JP3264678B2 - DC power supply evaluation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an evaluation system for measuring and evaluating characteristics of a DC power supply.

[0002]

2. Description of the Related Art There are a large number of electronic devices or devices incorporating electronic devices for industrial use, OA use, or home use, and the types of DC power supply devices used for these devices are numerous. However, with the improvement of the performance of electronic equipment or electronic devices, large output,
Along with the demand for multiple outputs and miniaturization, high efficiency (suppression of heat generation), prevention of noise generation, and stability of output with respect to input and load fluctuations are desired.

In general, a stabilized DC power supply combines a rectifying and smoothing circuit with a stabilizing circuit such as a dropper system such as a constant voltage diode, a series control circuit, or a parallel control circuit, a chopper circuit, or a switching DC-DC converter. The design is performed by combining a rectifying circuit and a stabilizing circuit according to the specifications from the main device while balancing the conflicting requirements.

In recent years, switching regulators combining a rectifier circuit and a high-frequency switching type DC-DC converter, which are excellent in terms of high efficiency, small size and light weight, have become mainstream. It is becoming more complicated, for example, a combination of series control circuits.

[0005] When a failure occurs in the DC power supply, not only the main unit goes down, but also precious records in the memory may be damaged. In addition, DC power supplies for equipment installation are rarely used with no load, and the minimum load and the maximum load (rated load or close to it) are specified in the specifications. The power may be turned on with no load, or the circuit may be short-circuited erroneously after assembly. Serious accidents such as damage, burnout, smoking, and ignition may occur.

As described above, the inspection of the DC power supply is one of the important inspection items, but before, for example, the output voltages V0, V1, and V when the input voltage is the rated value, the maximum value, and the minimum value, respectively.
2 was measured, and the input fluctuation rate was determined as (V1−V0) / V0 × 100% (V2−V0) / V0 × 100%, and the result was used to evaluate the input fluctuation specification.

However, the standards of the Japan Electronic Machinery Manufacturers Association (E
IAJ) Test method of RC-9002 single output type DC stabilized power supply (switching method) ", the output voltage EO at the rated input / output and the input voltage are changed within the input voltage range, and the maximum The value E1 and the minimum value E2 are measured, and the input fluctuation is (E1-E0) V and (E2-E0) V, respectively, or the input fluctuation rate is (E1-E0) / E0 × 100% (E2-E0) / E0 × 100%.

Therefore, instead of the three-point measurement as before, many measurements must be performed within the input voltage range, and the input / output voltage, current, and power are changed while changing the input voltage (AC) or the output load. It takes time to measure and calculate the fluctuation rate, efficiency, etc. by calculation, and it is easy to make mistakes because the operation is troublesome.

For this reason, for example, Japanese Patent Application Laid-Open No. 64-83160
As shown in the official gazette, input conditions by the control device,
There have been proposals of setting a load condition, measuring while changing the set condition sequentially, and recording the measured value in a predetermined format, such as a proposal for shortening the required time without manual operation.

[0010]

Generally, such an automatic inspection apparatus has a limited number of items, and its main purpose is to determine whether or not its performance is within an allowable range. It is valid. However, as the proposal suggests a noise contamination prevention plan in which the input conditions are changed and the measurement is continued when the noise contamination is detected, it is generally difficult to prevent noise contamination, and the reliability as an evaluation system is uncertain. However, it was difficult to expect, and high-precision measurement could not be expected.

Therefore, even if it is effective for process inspection, whether the prototype or product conforms to the design specifications and has satisfactory performance, or does it have the designed margin including out of the rated range? However, it was unsuitable for examining prototypes or for type inspection to check the stability in that case and whether the quality was excessive.

[0012] Further, since such a test has a very wide range of measurement items, there are many measurement data and characteristic data obtained by calculation, and the measurement data must be highly accurate and have minimal error mixing. Furthermore, since there are many items, data, and results, erroneous determination is likely to occur, and there is a problem that determination is difficult unless a skilled technician is used.

[0013] The present invention has been made in view of the above points, and it is possible to obtain reliable data in a short time without manual operation, and to obtain the result data in a form that can be easily determined. It is another object of the present invention to be able to make a determination without error.

[0014]

In order to achieve the above object, the present invention provides a DC power supply evaluation system for measuring input / output data of a DC power supply under a set load condition and evaluating its characteristics. A stabilized AC power supply unit for supplying AC power of a set supply voltage value to the DC power supply device, and control means for controlling the following units.

Further, according to the first aspect of the present invention, the supply voltage value of the stabilized AC power supply unit is changed so as to sequentially change from a minimum value to a maximum value of a specified measured input voltage range by a predetermined step value. Supply voltage setting means, load condition setting means for setting load conditions so that the load current or load power of the DC power supply device has a designated value, and supply voltage setting means for setting each supply voltage value. Measuring means for measuring the input voltage and the output voltage of the DC power supply device, and data output means for displaying or printing characteristic data of the output voltage with respect to the input voltage under the set load condition or graph thereof as measured data by the means. the provided, it is raised by a predetermined step value from the lowest value of the measured input voltage range in which the supply voltage setting means is first specified supply voltage value to its maximum value, the following And means for lowering at step value of the up minimum from the maximum value, the supply voltage setting
Means are a plurality of voltage value selection keys and a candidate value
A value selected from among the specified supply voltage value or measurement
Means for determining the minimum and maximum values of the input voltage range
And a plurality of voltage step value selection keys and their operation
The value selected from the candidate values is determined as the voltage step value.
The voltage value selection key or voltage step value
When the selection key is not operated, measure each characteristic
If the value corresponding to the most used measurement condition is set
The standard value of the above supply voltage value or measured input voltage range.
Determined as the minimum and maximum values or the above voltage step values
Means for setting a plurality of load conditions.
Key and the value selected from the candidate values by the operation
The minimum value including zero of the specified load or measured load range
And a plurality of load steps
A value selection key and a selection from the candidate values
Means to determine the specified value as the specified load step value
The load selection key or load step value selection key
If it is not created, use it most when measuring each characteristic.
Above the standard value that has been set to a value corresponding to the measurement conditions used.
The minimum and maximum values, including zero, of the load or measured load range
Means for determining the value as a large value or a load step value .

According to a second aspect of the present invention, the supply voltage value of the stabilized AC power supply is set so as to sequentially change from a minimum value to a maximum value of a specified measured input voltage range by a predetermined step value. Supply voltage setting means, load condition setting means for setting the load conditions so that the load current or load power of the DC power supply device has a specified value, and each supply voltage value set by the supply voltage setting means. Measuring means for measuring the input voltage, input current, input power and output voltage of the DC power supply device for each, and measuring data by the means for the input current, input power and input power with respect to the input voltage under the set load conditions. As characteristic data such as apparent power, output power, conversion efficiency, VA efficiency, power factor or the like obtained by calculation from output voltage or each measurement data by the means, or a graph thereof, The German or in combination of two or more, and a data output means for printing displayed or the same paper on the same screen provided, the supply voltage determining means is a plurality of voltage
A value selection key and a selection from the candidate values
Value to the specified supply voltage value or the maximum of the measured input voltage range.
Means for determining the low and high values and a plurality of voltage steps.
Value selection key and select from candidate values by the operation
Means for determining the value obtained as the voltage step value,
The voltage value selection key or voltage step value selection key is
If not, it is used most when measuring each characteristic.
Supply a standard value with a value corresponding to the measurement conditions
Voltage value or the lowest and highest values of the measured input voltage range or
Has means for determining the voltage step value.
The load condition setting means includes a plurality of load selection keys and their operations.
The value selected from the candidate values by the specified load or
Are determined as the minimum and maximum values including zero in the measurement load range.
Means, a plurality of load step value selection keys,
Negative value specified by the value selected from the candidate values by the operation
Means for determining as load step value, and load selection key
Or when the load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Means for determining the value as a loop value .

According to a third aspect of the present invention, there is provided a supply voltage setting means for setting a supply voltage value in a stabilized AC power supply unit to a specified value, and wherein the load current of the DC power supply device is zero or a specified measurement load current range. Load condition setting means for variably setting load conditions so as to sequentially change from a minimum value to its maximum value at a predetermined step value, and for each load current value according to load conditions sequentially set by the load condition setting means. Measuring means for measuring the input voltage and output voltage of the DC power supply device, and data output means for displaying or printing the measured data as characteristic data of the output voltage with respect to the load current at the set supply voltage or a graph thereof ,
The supply voltage setting means includes a plurality of voltage value selection keys,
The value selected from the candidate values by the operation
Supply voltage or the lowest and highest values of the measured input voltage range
A plurality of voltage step value selection keys,
The value selected from the candidate values by the operation is
Means for determining as the tap value, and the voltage value selection key or
If the voltage step value selection key is not operated,
It corresponds to the measurement conditions most used when measuring the characteristics.
The supply voltage value or the standard value
Minimum and maximum values of input voltage range or above voltage steps
Means for determining as a value, the load condition setting means
Are multiple load selection keys and whether the
The selected value from the specified load or measured load range
Means for determining the minimum and maximum values including b
Of the load step value selection key
The value selected from among the specified load step value
Means for determining and the load selection key or load step value
When the selection key is not operated, measure each characteristic
If the value corresponding to the most used measurement condition is set
Including the above load or zero of the measured load range
Procedure to determine minimum and maximum values or load step values
And a step .

According to a fourth aspect of the present invention, there is provided a supply voltage setting means for setting a supply voltage value in a stabilized AC power supply to a designated value, and a supply voltage setting means for setting a supply voltage value between a minimum value and a maximum value of the designated measured load power range. A load condition setting means for variably setting the load condition so that the load power of the DC power supply device becomes zero, or
The input voltage of the DC power supply for each load power value according to the load condition sequentially set by the load condition setting means,
Measuring means for measuring the input current, input power and output voltage respectively, and measuring data by the means from the input current, input power and output voltage with respect to the load power at the set supply voltage or each measuring data by the means. Apparent power, output power, conversion efficiency, V
A A data output means for displaying on the same screen or printing on the same paper surface as characteristic data such as efficiency and power factor or a graph thereof alone or in combination of two or more is provided.
The supply voltage setting means includes a plurality of voltage value selection keys,
Specify the value selected from the candidate values by the operation
Supply voltage value or the minimum and maximum values of the measured input voltage range
And a plurality of voltage step value selection keys
And the value selected from the candidate values by the operation
Means for determining as a step value, and the voltage value selection key
Or when the voltage step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Set the standard value with the corresponding value
Are the minimum and maximum values of the measured input voltage range or the voltage
Means for determining as a step value,
The setting means consists of a plurality of load selection keys and the candidate value
A value selected from among the specified load or measured load range
Means to determine minimum and maximum values including zero in the box
And a plurality of load step value selection keys
Load step specified value selected from candidate values
Means for determining the value, and the load selection key or load switch.
If the step value selection key is not operated,
The value corresponding to the measurement condition most used for measurement is
The set standard value is compared to the above load or measurement load range.
B) as the minimum and maximum values including the
Means for determining

According to a fifth aspect of the present invention, there is provided a supply voltage setting means for setting a supply voltage value in a stabilized AC power supply unit to a specified value, and wherein the load current of the DC power supply device is zero or in a specified measurement load current range. Load condition setting means for variably setting load conditions so as to sequentially change from a minimum value to its maximum value at a predetermined step value, and for each load current value according to load conditions sequentially set by the load condition setting means. Measuring means for measuring the ripple voltage and the ripple noise voltage on the output of the DC power supply, and displaying or printing the measured data as characteristic data of the ripple voltage and the ripple noise voltage with respect to the load current at the set supply voltage or a graph thereof. Data output means and supply voltage setting
The setting means has multiple voltage value selection keys and
Supply voltage value or measured is specified whether we selected value among the values
Means for determining the minimum and maximum values of the constant input voltage range
And a plurality of voltage step value selection keys and their operation
The value selected from the candidate values is determined as the voltage step value.
The voltage value selection key or voltage step value
When the selection key is not operated, measure each characteristic
If the value corresponding to the most used measurement condition is set
The standard value of the above supply voltage value or measured input voltage range.
Determined as the minimum and maximum values or the above voltage step values
Means for setting a plurality of load conditions.
Key and the value selected from the candidate values by the operation
The minimum value including zero of the specified load or measured load range
And a plurality of load steps
A value selection key and a selection from the candidate values
Means to determine the specified value as the specified load step value
The load selection key or load step value selection key
If it is not created, use it most when measuring each characteristic.
Above the standard value that has been set to a value corresponding to the measurement conditions used.
The minimum and maximum values, including zero, of the load or measured load range
Means for determining the value as a large value or a load step value .

According to a sixth aspect of the present invention, there is provided a supply voltage setting means for setting a supply voltage value in a stabilized AC power supply unit to a specified value, and a load current or load power of the DC power supply unit is set to a specified value. Load condition setting means for setting a load condition, and a measuring means for measuring the output voltage of the DC voltage device at a specified time interval set according to the total measurement time during the specified total measurement time, supply voltage that is set to the measured data, provided a data output means for displaying or printing the characteristic data or the graph of the output voltage with respect to the elapsed time in the load conditions, the supply voltage setting
Means are a plurality of voltage value selection keys and a candidate value
A value selected from among the specified supply voltage value or measurement
Means for determining the minimum and maximum values of the input voltage range
And a plurality of voltage step value selection keys and their operation
The value selected from the candidate values is determined as the voltage step value.
The voltage value selection key or voltage step value
When the selection key is not operated, measure each characteristic
If the value corresponding to the most used measurement condition is set
The standard value of the above supply voltage value or measured input voltage range.
Determined as the minimum and maximum values or the above voltage step values
Means for setting a plurality of load conditions.
Key and the value selected from the candidate values by the operation
The minimum value including zero of the specified load or measured load range
And a plurality of load steps
A value selection key and a selection from the candidate values
Means to determine the specified value as the specified load step value
The load selection key or load step value selection key
If it is not created, use it most when measuring each characteristic.
Above the standard value that has been set to a value corresponding to the measurement conditions used.
The minimum and maximum values, including zero, of the load or measured load range
Means for determining the value as a large value or a load step value .

[0021] In the invention of claim 6, as shown in Claim 16, when displaying or printing a graph of characteristic data, the time axis switching means for setting the time axis in accordance with the specified linear scale or a logarithmic scale Should be provided.

According to a seventh aspect of the present invention, there is provided a supply voltage setting means for setting a supply voltage value in a stabilized AC power supply section to a specified value, and a load current of a specified output of a multi-output DC power supply is zero or zero. Load condition setting that variably sets the load conditions so that the specified load value ranges from the minimum value to the maximum value of the specified measurement load current range in order, and sets the specified load conditions for other outputs Means,
Measuring means for measuring the output voltage of the DC power supply for each load current value according to the load condition sequentially set to the output specified by the load condition setting means, and converting the measured data to the rate of change of each output voltage. provided a data output means for displaying or printing the characteristic data or the graph of load fluctuation characteristics or other mutual variation characteristics of the output of the specified output for the load current of the specified output in terms to the set supply voltage The supply voltage setting means
Number of voltage value selection keys and their operation
Selected value to specified supply voltage value or measured input voltage
Means for determining the lowest and highest values of the range;
Voltage step value selection key
For determining a value selected from the above as a voltage step value
And the above voltage value selection key or voltage step value selection key
When it is not operated, it is best to measure each characteristic.
A standard value with a value corresponding to the measurement conditions used
The supply voltage value or the minimum value of the measured input voltage range and
Means for determining the maximum value or the voltage step value.
The load condition setting means has a plurality of load selection keys,
Specify the value selected from the candidate values by the operation
And maximum values including zero of the applied load or measured load range
And multiple load step value selection keys
And the value selected from the candidate values by the operation
Means for determining the obtained load step value, and the load
Selection key or load step value selection key is not operated
Is used when measuring each characteristic.
The standard value with the value corresponding to the condition
Is the minimum and maximum value including zero of the measured load range or load
Means for determining a step value .

In the invention of claims 3 to 5 and 7, when the output voltage measured at the time of measuring the output voltage of the DC power supply falls below a predetermined limit voltage, as described in claim 11 , Provide a shortcut means to end the measurement even if the load current or load power has not reached its maximum value, or to change the setting of the supply voltage by the stabilized AC power supply unit and proceed to the measurement under the next input voltage condition Good.

Further, as shown in claim 12, the load condition setting means, sequentially in a predetermined step value to a maximum value of load current or the load power at the set supply voltage from a minimum value of zero or measured load range When measuring while changing the measurement, if the measurement is performed once, the load condition at the time of performing each subsequent measurement is determined by the output voltage and load current value or load power value measured immediately before each measurement in a predetermined step. It is good to set with the value calculated by the value added by the value.

According to the present invention, the first supply voltage value is always supplied to the stabilized AC power supply unit in accordance with the measurement cycle, the application time, and the first and second supply voltage values different from each other. Supply voltage setting means for repeating setting and setting the second supply voltage value only for the application time in the measurement cycle;
Load condition setting means for setting load conditions so that the load current or load power of the DC power supply becomes a specified value, and input voltage of the DC power supply at a dynamically changing supply voltage set by the supply voltage setting means And measurement means for measuring and storing the waveforms of the output voltage and the output voltage, and data output means for displaying or printing the stored measurement data on one frame as a waveform diagram of the input voltage and the output voltage under the set load conditions. And the supply voltage setting means is provided with a plurality of
Voltage value selection key and select from candidate values by the operation
The specified value is the specified supply voltage value or the measured input voltage range.
Means for determining the lowest and highest values of
Step value selection key and its operation select from among candidate values
Means for determining the selected value as a voltage step value;
Operates the voltage value selection key or voltage step value selection key
If not, use it most when measuring each characteristic.
The standard value that has set the value corresponding to the measurement condition
Supply voltage value or minimum and maximum values of measured input voltage range
Means for determining the value or the voltage step value.
The load condition setting means includes a plurality of load selection keys and
Specified the value selected from the candidate values by the operation of
The minimum and maximum values including zero of the load or measured load range
And multiple load step value selection keys
And the value selected from the candidate values by the operation
Means for determining the obtained load step value, and the load
Selection key or load step value selection key is not operated
Is used when measuring each characteristic.
The standard value with the value corresponding to the condition
Is the minimum and maximum value including zero of the measured load range or load
Means for determining a step value .

According to a ninth aspect of the present invention, the supply voltage setting means according to the eighth aspect of the present invention is provided with means for setting the second supply voltage value to zero.

In the invention of claims 8 and 9, claim 1
As shown in FIG. 3 , the application time is defined as one cycle or half cycle of the AC power supplied from the stabilized AC power supply unit. At the initial setting unless otherwise specified, the application time is set to one unit, and the addition key and the subtraction are set. It is preferable to provide dynamic load time setting means capable of correcting the application time by one unit or an integral multiple thereof by a correction means such as a key or a numeric keypad.

Further, as shown in claim 17, stabilizing the AC power supply unit for supplying AC power frequency, the first and second
When a measurement condition changing means is provided, the operator can arbitrarily change the supply voltage value or the load conditions set by the load condition setting means or the measurement conditions such as the measurement period and the application time during the execution of the measurement, display or printing. Good.

In the first to ninth aspects of the present invention, the first aspect
As shown in FIG. 0, a frequency switching key for alternately switching the frequency of the AC power supplied from the stabilized AC power supply unit to 50 Hz and 60 Hz, and a frequency switching key of 50 Hz or 60 Hz which is predetermined when the frequency switching key is not operated. It is preferable to provide a means for setting one of them.

Further, as shown in Claim 14, it may be provided with scaling means for enlarging or reducing either or both scales of the horizontal and vertical axes of the graph data output means for displaying or printing. Further, as shown in claim 15 , after the data output means displays a plurality of characteristic data based on each measurement data as a graph on the same screen or in the same frame, from among various input / output items of the characteristic data, It is preferable to provide output data selection means for selectively displaying or printing only required graphs or required items of data.

[0031]

In the DC power supply evaluation system constructed as described above, the stabilized AC power supply unit operates in accordance with an instruction from the control means for controlling the entire system. To the DC power supply,
The load condition setting means sets the load condition so that the output current or the output power becomes a predetermined value. The measuring means measures input / output data of the DC power supply under the supply voltage and load conditions, and the data output means displays or prints characteristic data of the DC power supply or a graph thereof from the measured data.

Therefore, according to the first aspect of the present invention, under a predetermined load condition set by the load condition setting means, the supply voltage setting means sets a predetermined step between the minimum value and the maximum value of the specified measurement input voltage range. The supply voltage values are set so as to sequentially change with the values, and the input voltage and the output voltage of the DC power supply are automatically measured by the measuring means for each supply voltage value. Then, the data output means automatically outputs characteristic data of the output voltage with respect to the input voltage under the designated load condition or a graph thereof.

Further, the supply voltage setting means sets a supply voltage value which rises from the lowest value to the highest value of the measurement input voltage range specified by the predetermined step value, and then falls from the highest value to the lowest value. Thus, the characteristic data of the output voltage with respect to the increase / decrease of the input voltage under the designated load condition or a graph thereof can be obtained.

According to a second aspect of the present invention, under a predetermined load condition set by the load condition setting means, the supply voltage setting means sets a predetermined step value between a minimum value and a maximum value of the specified measured input voltage range. The supply voltage values are set so as to change sequentially, and the measuring means measures the input voltage, the input current, the input power and the output voltage of the DC power supply for each of the supply voltage values, and the data output means from the measured data. By calculation, characteristic data such as apparent power, output power, conversion efficiency, VA efficiency, power factor, etc. are automatically obtained.
Each characteristic data or its graph with respect to the input voltage under the specified load condition is automatically obtained. Further, the output can be made singly or in combination of two or more according to the purpose, so that it is easy to see.

According to a third aspect of the present invention, at a predetermined supply voltage value set by the supply voltage setting means, the load condition setting means sets a predetermined range between the minimum value and the maximum value of the specified measured load current range. The load conditions are set so that the load current changes sequentially with the step value, and the measuring means automatically measures the input voltage and the output voltage of the DC power supply for each load current, and the supply specified by the data output means. Characteristic data of the output voltage with respect to the load current at the voltage value or a graph thereof is output.

According to a fourth aspect of the present invention, at a predetermined supply voltage value set by the supply voltage setting means, the load condition setting means sets a predetermined step value between the minimum value and the maximum value of the specified measured load power range. The load condition is set so that the load power changes to zero or the load power becomes zero, and the measuring means determines the input voltage, input current, input power and output voltage of the DC power supply for each load power value under each load condition. Are automatically measured, and the data output means automatically obtains characteristic data such as apparent power, output power, conversion efficiency, VA efficiency, and power factor from the measured data by calculation, and is specified by the data output means. The respective characteristic data or the graph thereof for the load power at the supplied supply voltage value is automatically obtained.
In addition, the output can be made singly or in combination of two or more according to the purpose.

According to a fifth aspect of the present invention, at a predetermined supply voltage value set by the supply voltage setting means, the load condition setting means sets a predetermined range between the minimum value and the maximum value of the specified measured load current range. The load conditions are set so that the load current changes sequentially with the step value, and the measuring means automatically measures the ripple voltage and the ripple noise voltage on the output of the DC power supply for each load current, and the data output means The characteristic data of the ripple voltage and the ripple noise voltage with respect to the load current at the specified supply voltage value or the graph thereof is automatically output.

According to a sixth aspect of the present invention, the supply voltage setting means and the load condition setting means respectively set the designated supply voltage value and the load condition according to the load current or the load power, and the measuring means designates the designated total number. During the measurement time, the measurement of the output voltage of the DC power supply device is repeated at a time interval specified or designated according to the total measurement time, and by the data output means,
The characteristics of the output voltage with respect to the elapsed time under the set supply voltage and load conditions, that is, the characteristic data of the change with time of the output voltage or its graph is automatically output.

In the present invention, by providing the time axis switching means (claim 16 ), the time axis of the characteristic data graph can be set to a linear scale or a logarithmic scale according to the purpose. The presence or absence of an abnormality can be easily known.

According to a seventh aspect of the present invention, at a predetermined supply voltage value set by the supply voltage setting means, the load condition setting means sets the load current of the designated output of the multi-output DC power supply to zero or the designated measurement. The load conditions are variably set so that the load current range changes from the minimum value to the maximum value in a predetermined step value, and the load conditions specified for the other outputs are set. The measuring means automatically measures the output voltage of the DC power supply for each current. The data output means converts the measurement data into the fluctuation rate of each output voltage, and the load fluctuation characteristic of the output voltage of the specified output with respect to the load current of the specified output at the set supply voltage or the output of the other output. The characteristic data of the mutual variation characteristic of the output voltage or its graph is automatically output.

By providing the shortcut means (claim 11 ), when the load current or the load power increases, for example, an overcurrent prevention circuit or the like is activated, and the output voltage applied to the load is reduced in advance. When the voltage becomes equal to or lower than the predetermined limit voltage, the measurement is completed or the conditions are changed to proceed to the next measurement. Therefore, useless measurement time is prevented and an excessive load is not continuously applied to the DC power supply device.

When the load conditions are sequentially changed, 1
When the temperature measurement is performed, the load condition at the time of performing each subsequent measurement is determined by the output voltage measured immediately before each measurement and the load current value or the value obtained by adding the load power value by a predetermined step value. Set with the calculated value (Claim 12 )
Thus, the load condition can be set more accurately.

According to an eighth aspect of the present invention, in a predetermined load condition set by the load condition setting means, the supply voltage setting means always sets the first supply voltage value and sets the first supply voltage value for the specified application time. Setting a second supply voltage value different from the supply voltage value is repeated at a specified measurement cycle. The measuring means measures and stores the waveforms of the input voltage and the output voltage of the DC power supply at the dynamically changing supply voltage, respectively, and the data output means converts the stored measurement data to the input / output voltage under the set load condition. Since the waveform is output on one frame, the response characteristic of the output voltage to the instantaneous fluctuation of the input voltage can be obtained.

According to a ninth aspect of the present invention, the responsiveness of the output voltage at the momentary power failure of the input power source is achieved by the operation of the means for setting the second supply voltage value provided to the supply voltage setting means to zero. Is obtained.

According to the eighth and ninth aspects of the present invention, by providing the dynamic load time setting means (claim 13 ), the application time is set to one unit (one cycle or half cycle of AC power) at the time of initial setting. Modification means such as a key makes it possible to make corrections one unit at a time or in integral multiples thereof, which facilitates setting and correction.

Further, a measurement condition changing means is provided.
17 ) By doing so, the operator can arbitrarily change the measurement conditions even during measurement, display, or printing. Therefore, change the measurement conditions while checking the displayed waveform of the input / output voltage to check for abnormalities. If there is something wrong, you can print.

The invention of claim 1 to 8, a plurality of voltage values selection key, voltage step value selection key and load selection key, negative
And load step value selection key, the lowest value of the supply voltage or the measured input voltage range specified a value selected from among the candidate values and Wakashi maximum value or the specified load by the operation
Or means to determine the minimum and maximum values including zero of the measured load range , their voltage value selection key , and voltage step.
Flop value selection key and load selection key, load step selected key
Key is not operated when measuring each characteristic.
Also, since there is provided a means for determining each value as a standard value in which a value corresponding to the measurement condition used is set, it is easy to set or correct each value constituting the measurement condition together with each key and each means. In particular, under the standard measurement conditions, the measurement can be started immediately when the power of the evaluation system is turned on.

[0048] Further, in the invention of claims 1 to 9, when as shown in claim 10, stabilizing the AC power supply unit provided with frequency switching key is the frequency of the AC power 50
The operability when alternately switching between Hz and 60 Hz is improved.

Further, a scale changing means is provided.
14 ) By doing so, it is possible to enlarge or reduce the scale of one or both of the horizontal axis and the vertical axis of the graph output by the data output means. Further, by providing the output data selection means (claim 15 ), after the data output means displays a plurality of characteristic data graphs arranged in the same screen or superimposed in the same frame, the data output means is required according to the situation. Only graph or item data can be selectively displayed or printed.

Each of the means described in claim 14 and 15 together with the time axis switching means (claim 16 ) can delete unnecessary portions from the displayed or printed characteristic graph,
Line organize such as to enlarge the portion of the required or the problem
What can be displayed or printed is converted into easily graph determined easily viewable.

[0051]

FIG. 1 shows a DC power supply evaluation system (hereinafter simply referred to as an "evaluation system") according to the present invention.
FIG. 2 is a block diagram showing a configuration of an evaluation system related to.

This evaluation system 10 includes an AC stabilized power supply 1 which is a stabilized AC power supply, a controller 2 which is a control means for controlling the entire system and is a supply voltage setting means and a load condition setting means, and a controller 2. A built-in memory 3, an operation unit 4 for an operator to input various data and instructions to the evaluation system 10, a display unit 5 as a data output unit, a recording unit 6, and a device to be evaluated supplied with AC stabilized power AC power meter 7 as a measuring means for measuring an input voltage (AC) input to DC power supply device 11
And two sets of power testers 8a and 8b, which are measuring means for measuring the output voltages (DC) of the two outputs A and B of the DC power supply 11, respectively.

The stabilized AC power supply 1 has, for example, a set frequency of 50 Hz or 6 output from an internal oscillator (not shown).
It comprises a noiseless, low distortion, programmable AC stabilized power supply that amplifies the voltage and power of a 0 Hz reference sine wave signal to a supply voltage value set by the controller 2 and supplies it to the DC power supply 11.

The AC power meter 7 and the two sets of power testers 8a and 8b,
Input voltage of the DC power supply 11 and 2
The output voltages of the outputs A and B are measured, and the measured data is output to the controller 2.

Since the input of the DC power supply 11 is AC power with a noiseless and low distortion rate, the voltage measurement method of the AC power meter 7 may be any type such as a rectification type, a PP type, a power meter type, and an effective value type. However, if stable high-precision measurement data can be obtained, and if noise is mixed in the measurement data of the power supply testers 8a and 8b, the noise is nothing but the DC power supply 11 itself.

The controller 2 comprises a personal computer (hereinafter, referred to as a "personal computer"). An operation unit 4 composed of a keyboard and a display unit 5 composed of a CRT display are integrated with the main body of the personal computer. , AC power meter 7, power supply testers 8a, 8b
And a recording unit 6 including a printer, a plotter, and the like, respectively, an IEEE-488 bus (GPIB), an RS232
It is connected to the personal computer by cables such as C and Centronics.

The memory 3 of the controller 2 stores measurement and processing routines for each characteristic as an evaluation menu of the evaluation system 10. The input / output rating specifications and measurement items of various DC power supply units are previously transmitted from the operation unit 4. It is registered as a list.

The rated specification of the DC power supply 11 is, for example, input AC 100 V ± 15%, outputs A and B are DC 24 V and DC 5 V, respectively, and output fluctuation characteristics (hereinafter referred to as “input fluctuation characteristics”) with respect to the input voltage are ± 3. %, ± 1%
It is.

After the DC power supply 11 is connected to the evaluation system 10, the input fluctuation characteristic measurement is selected from the menu, and then the input / output rated specifications of the corresponding DC power supply are read from the registration list. The measurement conditions based on the specifications are set.

FIG. 2 is a flow chart showing an example of an output voltage input fluctuation characteristic measurement routine in a related evaluation system. FIG. 3 is a diagram showing one example of the output voltage output fluctuation input voltage characteristic data obtained by the routine. This is an output example. FIGS. 4 and 5 are diagrams showing one display example of the graph of the characteristic data. The horizontal axis represents the input voltage (AC), and FIG.
The output voltage (DC) is plotted on the vertical axis, and the scales of the vertical axes are different between FIG. 4 and FIG.

The input fluctuation characteristic measurement routine will be described with reference to the flowchart shown in FIG. First, the operator operates the DC power supply 1 from the operation unit 4 (keyboard of the personal computer).
When the machine number 1 is designated, and then the program for measuring the input fluctuation characteristics is read and started, the display unit 5 displays a graph frame of the scale shown in FIG. 4 based on the read specifications.

That is, the horizontal axis indicates the rated input voltage (AC1
00V) of 50% to 150%, and the vertical axis indicates a range of voltage values (0 V to 30 V) with a sufficient margin with respect to the maximum rated value of the output voltage (24 V × 1.03 = 24.72 V). A graph frame is displayed.

Next, a minimum value and a maximum value of the measurement input voltage range and a step value for dividing the range are determined from function keys (not shown) which are keys for selecting a plurality of voltage values and step values of the operation unit 4 (keyboard). Enter each. In the lower part of the CRT screen of the display unit 5, corresponding values of the function keys are displayed at positions corresponding to the respective keys according to the input data.

For example, from the left side, the input rated voltage (AC10
. 0, 95, 50, 55, 60... 95 for the lowest value input of the measurement input voltage range, 105, 110, 115... 150 for the highest value input, and 1 for the step value input. , 2, 2.5, 5, and 10 are displayed, and if the corresponding key is pressed and input, the value is set by the controller 2 according to the input data.

In any case, when no designation is made, that is, when the function key is not pressed (the CR key is pressed), the standard values, for example, the minimum value and the maximum value are 85% and 1 respectively.
The controller 2 sets 15% and the step value 5%.

That is, the controller 2 determines the values selected by operating the respective selection keys as the minimum value, the maximum value, and the step value. When the selection key is not operated, the controller 2 automatically determines the standard value. It is also a means to determine.

Subsequently, the rated loads (generally resistances) of the outputs A and B are set in the power supply testers 8a and 8b based on the rated specifications and the set values, respectively. Is set as the first set value of the supply voltage, and the process proceeds to the measurement cycle.

Here, a minimum value of 75% (75 V) and a maximum value of 125% (1%) are set with a 10% margin on both sides of the rated input voltage range ± 15% as the measured input voltage range.
25 V) is input as 5% (5 V) as a step value, so the initial set value of the supply voltage is 75% (75 V).
V), then 80%, 85% ... 120%, 125%
Are sequentially set.

In the measurement cycle, data obtained by measuring the set supply voltage value, that is, the input voltage by the AC power meter 7 and the output voltage of the output A applied to the load by the power supply tester 8a are stored in the memory 3 and initialized. The plot is displayed in the graph frame displayed on the display unit 5 at the scale set at the time.

Next, it is determined whether or not the input voltage Vin is the highest value. If not, the input voltage Vin is reduced to the step value Δ
The measurement cycle is increased by V (5 V), and the flow returns to the measurement cycle to repeat the measurement. When the input voltage Vin is determined to be the highest value, the graph displayed on the display unit 5 is as shown in FIG. 4, and the horizontal axis is 50% to 150% and the vertical axis is 0 V to 30 V. The graph is formed in the range of 75% to 125% on the horizontal axis. In addition, the frame shown by the broken line is from 85% on the horizontal axis.
This is a frame indicating a rating of 115% and a vertical axis of 24 V ± 3%, and is displayed together with a graph frame from the time of initial setting.

Next, the operator is inquired as to whether or not to change the scale of the graph, and if so, the vertical or horizontal axis or both axes are changed based on the designated scale based on the data stored in the memory 3. Redisplay the graph.

For example, if it is not clear from the graph shown in FIG. 4, if the operation unit 4 instructs the vertical axis to be enlarged five times around the rated output of 24 V, the controller 2 which is also the scale changing means operates. Then, the graph as shown in FIG. 4 is displayed again.

Next, an inquiry is made to the operator as to whether or not to print the graph, and when the graph is to be printed, the displayed graph is printed out on paper as it is by the recording unit 6 comprising a printer or a plotter.
If not, the printing is omitted. That is, if the graph shown in FIG. 5 is acceptable, printing is performed, and if the graph is not satisfactory, the printing is omitted.

Next, an inquiry is made to the operator as to whether or not to perform re-measurement. In the case of re-measurement, the measurement conditions to be changed which are instructed by the operator are read and set again, and the process returns to the measurement cycle. For example, FIG.
If the graph shown in is unsatisfactory and the step value should be the finest, the step value should be 2.5%, 2% or 1%.
Then, re-measure and confirm the displayed graph before printing.

When the measurement of the output A and the data output thereof are completed, the output B is measured in the same manner by the power supply tester 8b, and the output voltage range, that is, the scale of the vertical axis is different, but the processing is performed in exactly the same manner. Alternatively, if the output voltage of the output B is measured by the power supply tester 8b and stored in the memory 3 simultaneously with the measurement of the output A by the power supply tester 8a, the time for repeating the measurement cycle can be saved.

Normally, the characteristic data shown in FIG. 3 does not need to be displayed. However, when an abnormality is recognized in the graph, it may be displayed to investigate the cause. Also, they can be displayed side by side on the same screen of the display unit 5 together with the characteristic graph,
The data may be printed on the same sheet by the recording unit 6 together with the characteristic graph B.

The first aspect of the evaluation system according to the first aspect of the present invention
Since the configuration of the embodiment is the same as the related evaluation system shown in FIG. 1, the reference numerals are used as they are, and the description is omitted. The difference between the first embodiment and the related evaluation system is that the supply voltage value set by the controller 2 serving as the supply voltage setting means is a predetermined step value from the lowest value of the specified measured input voltage range to its highest value. And then descend at that step value from the highest value to the lowest value.

FIG. 6 is a flow chart showing an example of an output voltage fluctuation characteristic measurement routine for input voltage up / down in the first embodiment. FIG. 7 shows output voltage fluctuations of outputs A and B obtained by the routine. It is an example of one output of characteristic data. FIGS. 8 and 9 are diagrams showing one display example of the graph of the characteristic data.

The rated specification of the DC power supply device 11 of the first embodiment is, for example, an input AC 100 V ± 20%, and the output voltage / current specifications of the outputs A and B are respectively 5.1 V DC / output.
3A and DC24V / 3A, input fluctuation specification is ± 1%
And ± 3%, the load conditions were 1.7
Ω and 8Ω resistance.

The minimum value of the measurement input voltage range is zero,
The highest value is 130%, which is the rating 20% plus 10% margin
(130V), and the step value is 5% of the standard value. The measurement of zero input voltage itself is not meaningful, but when the input voltage occurs when the output voltage rises and disappears when the output voltage goes down, it is common to set the lowest value to zero in most cases. There is also an advantage that it is not necessary to reset the minimum value.

The flow chart shown in FIG. 6 shows that the input voltage Vin
Is the same as the flow chart of the first embodiment shown in FIG. 2 except for a loop in which the value reaches the maximum value Vinmax and then decreases to the minimum value Vinmin with the step value ΔV, and therefore the description is omitted. FIG. 8 is an example in which the graphs of the characteristic data of the outputs A and B shown in FIG. 7 are displayed in the same frame at the same scale, and FIG. 9 is output by the controller 2 which is also the output data selecting means and the scale changing means. This is an example in which only A is selected, and the scale on the vertical axis is enlarged to display fine fluctuations easily.

The characteristic graphs shown in FIGS. 8 and 9 and FIG.
As is clear from the characteristic data shown in FIG.
In the range of 70% to 130% including the margin, of course, the output voltages of the outputs A and B are within the rated input fluctuation range ± 120%.
Within 1%, ± 3%.

The output voltages of the outputs A and B tend to decrease when the input voltage is less than 60%, and in particular, the input voltage is 35% to 40% in the up direction and 30% in the down direction.
It can be seen that in the range of ２５25%, the tendency to decrease more rapidly is exhibited. Such a phenomenon can be captured only by measuring the input fluctuation characteristics due to the up / down.

FIG. 10 is a block diagram showing a second embodiment of the evaluation system according to the second aspect of the present invention. The same parts as those of the related evaluation system shown in FIG. Omitted.

The difference between the evaluation system 20 and the related evaluation system is that the DC power supply 21 which is the device to be evaluated
Has three outputs A, B, and C, so that the measuring means is also provided with three sets of power testers 8a, 8b, and 8c.

The rated specification of the DC power supply 21 of the second embodiment is that the input AC is 100 V ± 20%, and the output A,
B and C are DC5.1V / 3A, DC24V / 3A, DC
24V / 2A, the load resistance is 1.7
Ω, 8Ω, and 12Ω. The AC power meter 7 is also the same as the related evaluation system as a device, and can measure the input voltage, current, power, and its frequency. Output to controller 2.

Therefore, the measurement data is based on the input voltage Vi.
n, input current Iin, input power Win and outputs A, B,
Since there are six types of output voltages Va, Vb, and Vc of C,
The input fluctuation characteristic with respect to the input voltage Vin is also determined by the input current Ii.
n, input power Win, and output voltages Va, Vb, and Vc, as well as apparent power VAi calculated from measurement data.
n, output power Wa, Wb, Wc, total output power Wout, conversion efficiency Wef, VA efficiency VAef, power factor PF, etc. Also vary widely.

The calculation formula of each characteristic obtained by calculation from the measured data is shown below. However, the load resistances of the outputs A, B, and C are Ra, Rb, and Rc. Apparent power VAin = Vin × Iin Power factor PF = Win / VAin Output power of output A Wa = Va × Va / Ra Output power of output B Wb = Vb × Vb / Rb Output power of output C Wc = Vc × Vc / Rc Total output power Wout = Wa + Wb + Wc Conversion efficiency Wef = Wout / Win VA efficiency VAef = Wout / VAin

After connecting the DC power supply 21 to the evaluation system 20, select the input fluctuation characteristic measurement from the menu of the evaluation system, and then read the input / output rating specification of the corresponding DC power supply from the registration list. Then, measurement conditions based on the specifications are set. Among many characteristic correlation graphs, three sets of input voltage characteristics (1) input current characteristics (2) input power, apparent power, total output power characteristics (3) conversion efficiency, VA efficiency, and power factor characteristics An example will be described in which a graph of the input fluctuation characteristics of FIG.

FIG. 11 is a flow chart showing an example of a routine for measuring the input fluctuation characteristics of the input current, the input / output power and the respective efficiencies in the second embodiment. FIG. 12 shows one output of each characteristic data obtained by the routine. FIG. 13 is a diagram showing a display example of a graph of the characteristic data.

In the second embodiment, the output voltages Va of the outputs A, B, and C need not be measured after the output A is measured as in the related evaluation system. , Vb, Vc need to be measured simultaneously and output to the controller 2. In each of the three graphs 1, 1 and 2, the horizontal axis represents the same input voltage range of 50% to 150%, and is simultaneously displayed (or printed) on the same screen (or the same paper). You.

The vertical axis of graph 1 showing the input current Iin characteristic of the graph frame initially displayed in the graph shown in FIG. 13 is in A (ampere) unit, and its range is determined as follows.

At the time of initial setting, since the maximum value of the input current Iin is unknown, the unknown power factor and the conversion efficiency are respectively set to general values, for example, if the DC power supply 21 is a switching regulator, the power factor PF = Assuming 0.5 and the conversion efficiency Wef = 0.8, the rated total output power Wout, ie, Wout = 5.1 × 3 + 24 × 3 + 24 × 2 = 135.3 (W) is converted to the assumed value 0.8 of the conversion efficiency Wef. Divided by the input power Wi
An assumed value of 169.1 W for n is obtained and further divided by the assumed value of the rated input voltage Vin = 100 V and the assumed value of the power factor PF of 0.5 to obtain an assumed value of 3.4 A for the input current Iin.

The range of the input current Iin is about 1.5 to 2 times the assumed value 3.4 A, for example, 0 to 5 A. The vertical axis of the graph 2 showing the characteristics of the input power Win, the apparent power VAin, and the total output power Wout is in units of W, and ranges from about 3 to 5 times the already obtained rated total output power Wout = 135.3 W, for example, 0 to 500 W. And The vertical axis of the graph 3 showing the characteristics of the conversion efficiency Wef, the VA efficiency VAef, and the power factor PF is in units of%, and since the efficiency and the power factor are less than 1, the range is 0 to 100%.

The input fluctuation characteristic measurement routine will be described with reference to the flowchart shown in FIG. Here, as the measured input voltage range, a margin of 10% is provided on both sides of the rated input voltage range ± 20%, and the minimum value is 70% (70%).
V), a maximum value of 130% (130V) is input, and a standard step value, for example, 5% is automatically set without inputting a step value.

Therefore, the initial set value of the supply voltage is 7
0% (70V), then 75%, 80% ... 125
% And 130% are sequentially set.

When a measurement start instruction is input from the operation unit 4, the power supply testers 8a, 8b, and 8c perform initial settings such as setting rated loads of 1.7Ω, 8Ω, and 12Ω, respectively, and then proceed to a measurement cycle.

In the measurement cycle, the input voltage Vin changes from the initially set minimum value Vinmin (70 V) to the maximum value Vmin.
The input voltage Vin, the current Iin, and the power Win are measured by the AC power meter 7 at each voltage step until the voltage reaches the maximum value inmax (130 V).
, The output voltages Va, Vb, and Vc of the outputs A, B, and C are respectively measured. The controller 2 stores and calculates the input measurement data in the memory 3 and displays the data on the display unit 5. Display a plot in the graph frame.

When the measurement cycle is completed, a graph as shown in FIG. FIG.
3 shows input current characteristics, graph 2 shows apparent power characteristics, input power characteristics, and total output power characteristics in order from the top, and graph 3 shows conversion efficiency, power factor, and VA efficiency in order from the top.

To change the scale to make the graph easier to see, the required graph 1, graph 2, and graph 3 may be specified and the horizontal axis or vertical axis scale may be indicated. As shown in FIG. In the same case, that is, if the parameters are the same, it is even better to change them simultaneously.

As described above, if a graph display, particularly a graph of a related characteristic, is displayed on the same screen, it becomes easy to judge the characteristic at a glance, and the evaluation can be easily performed even by a non-skilled engineer.

As described in the related evaluation system, when further examination is required, for example, when an abnormality is found or felt in a graph, all data is displayed or printed as a table as shown in FIG. , It is possible to obtain more detailed information than a graph. FIG.
2 are input data Vin, input current Iin, and input power W which are measurement data in the third embodiment.
2 shows the output voltage Vout, which is not displayed, the apparent power VAin, the total output power Wout, the W (conversion) efficiency, the VA efficiency, and the power factor obtained by calculating the measured data.

If the measurement data is stored in an external storage device such as a hard disk or a floppy disk together with the measurement conditions and the like, it can be output again as a graph or a table and reconsidered when a problem occurs later.

As described above, when inputting the minimum value and the maximum value or the step value of the measurement input voltage range, the numerical keys (also called numeric keys) of the keyboard (operation unit 4) are used.
However, if a function is selected from each of the candidate values prepared in advance and designated by a function key (selection key), a means for setting each value is provided, so that the operation is facilitated. In addition, when there is no input using the function keys, a means for automatically setting each standard value is provided, so that operability is further improved.

A third aspect of the evaluation system according to the third aspect of the present invention.
Since the configuration of the embodiment is also the same as the related evaluation system shown in FIG. 1, the reference numerals are used as they are and the description is omitted. The third embodiment differs from the related evaluation system in that the controller 2 which is both the supply voltage setting means and the load condition setting means changes the supply voltage value to a specified (stepwise) value and the load condition. Since the load current is variably set so as to sequentially change from a minimum value to a maximum value of the specified measurement load current range at zero or a predetermined step value, the display unit 5 serving as data output means and the recording unit 6 displays or prints characteristic data or a graph of the output voltage with respect to the load current at the set supply voltage.

The rated specification of the DC power supply 11 of the third embodiment is that the input AC is 100 V ± 15%, and the outputs A, B
Are DC20V / 0.5-4A, DC5.1V /
3A, the output fluctuation characteristics with respect to the input voltage, that is, the rated input fluctuation characteristics are ± 10% and ± 2%.

FIG. 14 is a flowchart showing an example of a routine for measuring the load fluctuation characteristics of the output voltage in the third embodiment.
FIGS. 15 and 16 are diagrams showing examples of graphs displaying the overload characteristic and the load fluctuation characteristic of the output A, respectively. The horizontal axis represents the output current Iout, and the vertical axis represents the output voltage Vout. The scales of the horizontal axis and the vertical axis are different between 15 and FIG.

Initially, only the graph frame of the scale shown in FIG. 15 is displayed on the display unit 5 based on the read specifications. That is, the vertical axis indicates the rated output voltage (20
V) is 1.2 to 2 times the range of, for example, 30 V, and the horizontal axis shows a graph frame in the range up to the measured maximum load current value set with a sufficient margin for the rated current.

Next, the maximum value and the zero of the load current (here, the minimum value is automatically set to zero) from a plurality of function keys (not shown) which are selection keys for the maximum load and the step value of the operation unit 4 (keyboard). ) To the maximum value.

In the lower part of the CRT screen of the display unit 5, at the position corresponding to each key of the function key according to the input data, for example, with respect to the maximum output rated current (DC4A) of the output A from the left side. If the maximum value of the load is input, 110%, 125%, 150%, 200%, 250
%, 300%, 400% is 1 if step value input
Since%, 2%, 2.5%, 5%, 10%, and 20% are displayed, if the corresponding key is pressed and input, the controller 2 as the maximum value determining means and the step value determining means displays the values. The value is set according to the input data.

In any case, when no designation is made, that is, when the function key is not pressed (the CR key is pressed), the controller 2 sets standard values, for example, 250% and 1%, respectively, to measure overload characteristics. Is done. These standard values differ for each evaluation menu and are set in advance. For the output B, a rated load (5.1 V / 3 A = 1.7Ω) is set based on the rated specifications.

The supply voltage value is set to a rated input voltage range of ± 15% by key input according to the relevant evaluation system.
85% (85V) and 115% (115
V), since the step value is set to 15% (15V),
The initial supply voltage value is 85%, and thereafter 100%, 115
% Is set sequentially.

FIG. 14 shows a routine for measuring the load fluctuation characteristics.
This will be briefly described according to the flowchart shown in FIG. When the operator reads out and starts this program, it first performs initialization, and then determines whether or not the input voltage Vin has exceeded the maximum value. If not, the load current is zero, that is, the load resistance of the power supply tester 8a is reduced. Set to ∞ and enter the load change cycle.

In the load change cycle, first, the input voltage Vi
n, the output voltage Vout is measured and output to the controller 2. The controller 2 stores the measurement data in the memory 3 and outputs the output voltage Vout of the output A according to the scale of the graph frame displayed on the display unit 5. Is plotted.

Next, the controller 2 serving as a shortcut means determines whether or not the measured output voltage Vout is equal to or less than a limit voltage (here, 0.5 V) preset to, for example, 0.2 V to 0.5 V. Then, it is determined whether or not the set load current Iout has reached the maximum value. If none is found, change the load and return to measurement (load change cycle), and if any one is acceptable, go to reset the supply voltage. If the load current is at the maximum value,
Since all the measurements under the input condition (supply voltage) have been completed, the next measurement may be performed with the input condition changed without any problem.

If the output voltage is equal to or lower than the limit voltage, the DC power supply 11 is in an overload state and the output voltage is gradually reduced, or an overload prevention circuit for preventing the output voltage is activated. is there. In the former case, which does not have a prevention circuit, the DC power supply may overheat or run away due to thermal runaway. Must be set on the eyes.

An example of an irreversible overload protection circuit is a fuse, the output of which remains off until it is replaced. If it is reversible, the output will immediately return to a stable state once the cause of the overload is removed. At present, most of them have a reversible overload prevention circuit in preparation for a load short circuit accident, but there is a large difference depending on the characteristics of the DC power supply itself and the type of the prevention circuit.

That is, when the output current increases and exceeds a certain limit point, for example, as shown in FIG. 3, the output voltage and the output current rapidly converge to zero. "U-shape" characteristic, in which only the output voltage drops according to the load, changing from the limit point to the constant current characteristic (also called the drooping characteristic)
And others. A switching regulator is an example of the “U-shaped” characteristic, and a dropper type such as a constant-voltage / constant-current DC power supply is an example of the “U-shaped” characteristic.
Except for special examples such as a constant-voltage / constant-current DC power supply, the limits are often unknown, and even when indicated in the specifications, they are merely reference values or average values.

Therefore, in order to know the overload characteristic in particular, it is necessary to set the maximum value of the load current to be large and to take a small step value. Will continue. In the third embodiment, when the output voltage becomes equal to or lower than the limit voltage, the shortcut means operates, and even if the load current does not reach the maximum value, the measurement under the input condition is terminated and the measurement is advanced to the next input condition. Therefore, there is a great effect that the measurement time is shortened without overloading the DC power supply device.

When the above two determinations are both negative and the load is changed, a load resistance corresponding to a new load current obtained by adding a step value to the previous load current is set in the power supply tester 8a, and the output voltage is changed. Return to measurement. In the first measurement, the load current is zero, that is, the load resistance ∞. However, since the load current is not zero after the second measurement, the controller 2 determines the output voltage V
The load resistance obtained by dividing in by the new load current may be set in the power supply tester 8a as the next load condition.

Conventionally, the rated value of the output A has been adopted as the output voltage. However, if the output voltage fluctuates depending on the load, a predetermined load current cannot be obtained. According to the present invention, the load resistance is obtained by dividing the output voltage measurement value obtained in the previous measurement by the new load current each time, so that the error in the load current is greatly reduced.

If any one is acceptable, a new supply voltage (input condition) obtained by adding a step value to the supply voltage is set in the AC stabilized power supply 1, and whether or not the input voltage Vin exceeds the maximum value is determined. Return to the determination of. When it is determined that the input voltage Vin exceeds the maximum value, the graph displayed on the display unit 5 becomes as shown in FIG.
Within the graph frame of 30 V, a graph of the overload characteristic is formed in a range of 0 to 5.7 A (limit point) on the horizontal axis. In addition, the frame shown by the broken line is 0.5 A to 4 A on the horizontal axis and 20 V ± on the vertical axis.
This is a frame indicating a rating of 10%, and is displayed together with a graph frame from the time of initial setting.

Next, the operator is inquired as to whether or not to print the graph of the overload characteristic, and in the case of printing, the displayed graph is printed on the paper as it is by the recording unit 6 comprising a printer or a plotter. Print out, otherwise omit printing.

Next, an inquiry is made to the operator as to whether or not to edit the output data to form a graph of the load fluctuation characteristics, and when an instruction to edit the data is input, the operator places a focus on the frame indicated by the dashed line indicating the rating. In addition to changing the scale to make it easier to see, the controller 2 serving as output data editing means operates to erase data outside the rated output current range from the graph, and
After the graph of the load fluctuation characteristic as shown in (1) is formed and displayed again on the display unit 5, the process returns to the determination of whether or not to print the data.

If the output data has not been edited, the operator is next inquired of whether or not to perform re-measurement. In the case of re-measurement, the measurement conditions to be changed which are instructed by the operator are read and set again, and the process returns to the measurement cycle.
When the measurement of the output A and the output of the data are completed, the output B is also measured in the same manner by the power supply tester 8b.
The processing is exactly the same.

As described above, "setting the supply voltage value to a specified value" is not necessarily limited to setting to a specific one value, but may be a plurality of specified values or a minimum value and a maximum value. The interval may be changed sequentially with a predetermined step value.

A fourth aspect of the evaluation system according to the fourth aspect of the present invention.
Since the configuration of the embodiment is the same as that of the second embodiment shown in FIG. 10, the reference numerals are used as they are and the description is omitted. The rated specifications of the DC power supply 21 are the same as in the second embodiment.
The input AC is 100V ± 20%, and the outputs A, B, and C are DC 5.1V / 3A, DC24V / 3A, DC2, respectively.
4V / 2A, AC power meter 7 is also a power tester 8
a to 8c are the same as in the second embodiment.

The method of setting the measured data, the characteristic data obtained by calculation and its calculation formula, or the output characteristic graph, its frame, range, and scale is the same as in the second embodiment. Therefore, all the overlapping description will be omitted.

This fourth embodiment is different from the second embodiment in which the input fluctuation characteristics are measured. In order to measure the load fluctuation characteristics, the load resistance Ra, which is the load condition of the outputs A, B and C, is used.
Rb and Rc are both variably set at the same time, and each time the output voltages Va, Vb and Vc are simultaneously measured and output to the controller 2.

FIG. 17 is a flowchart showing an example of a routine for measuring load fluctuation characteristics of input current, input / output power, and efficiency in the fourth embodiment. FIG. 18 is an output example of each characteristic data obtained by the routine. FIG. 19 is a diagram showing a display example of a graph of the characteristic data.

The routine for measuring the load fluctuation characteristics is shown in FIG.
This will be briefly described according to the flowchart shown in FIG. First, a measurement condition is designated by a selection key of the operation unit 4. Display 5
In the lower part of the CRT screen are displayed 100%, 105%, 110%... 150% with respect to the rated total output power (135.3 W) from the left as candidate values of the measured maximum load power. Here, a standard value, for example, 120% (162.4 W) is adopted without designating with the selection key. Next, step value candidates 1%, 2%, 2.5%, 5%, 10%, 2
Although 0% is displayed, a standard value, for example, 10% is adopted here. Similarly, a rated input voltage of 100 V is input as the supply voltage.

When a measurement start instruction is input from the operation unit 4, the supply voltage 100V is set to the AC stabilized power supply 1, and the output power of each of the power testers 8a, 8b, 8c is set to zero, that is, the load resistance is set to ∞. And then enters the load change cycle.

In the load change cycle, the input voltage Vin, the current Iin, and the power Win are calculated by the AC power meter 7.
The output voltages Va, Vb, and Vc of the outputs A, B, and C are measured by the power testers 8a, 8b, and 8c, respectively. The controller 2 stores the input measurement data in the memory 3 and calculates the data. A plot is displayed in a graph frame displayed on the display unit 5. Next, it is determined whether or not each of the measured output voltages Va, Vb, and Vc is equal to or lower than a preset limit voltage. Subsequently, the total output power Wout obtained by the calculation is the maximum measurement value (16).
2.4 W) is determined.

If none of the above is true, the load resistance corresponding to each new load power obtained by adding each step value, that is, 10% of each rated power, to each load power of the outputs A, B, and C is supplied to the power supply tester 8a. , 8b, and 8c, respectively, and return to the next measurement. The load resistance at that time is obtained by dividing the square of the voltage by the load power, and the rated output voltage may be used as the voltage. However, the output voltage just measured (the previous output voltage If you use), accuracy is good.

If any one of the judgments is acceptable, the load change cycle is completed, and a graph as shown in FIG. 19 shows the input current characteristics, graph 2 shows the apparent power characteristics, input power characteristics, and total output power characteristics in order from the top, and graph 3 shows the conversion efficiency, power factor, and VA efficiency in order from the top. .

The output characteristic measurement routine shown in the flow chart of FIG. 17 shows an example in which one supply voltage is used as an input condition. However, as in the third embodiment, the rated input voltage and its minimum Value, the highest value, ie AC80V, 100V, 12
In many cases, the measurement is performed with respect to 0 V while changing the conditions. For this reason, a large number of graphs are required even if the result data and the graphs are easy to determine the combination.
The three graphs shown in FIG. 9 are only a part of them.

Therefore, when the load fluctuation cycle is completed, all the graphs are displayed on the same screen in a reduced scale, or the entire list is displayed, and the operator is provided with
It inquires which graph to select and display singly or in combination, and if specified, the controller 2 as output data selection means displays data of the specified graph or item on the same screen. If a graph display, especially a graph of a related characteristic is selected and displayed on the same screen, the characteristic can be easily determined at a glance, and the evaluation can be easily performed by a non-skilled technician.

Next, an inquiry is made as to whether or not the displayed data is to be printed, and printing is performed according to the instruction or printing is omitted. Further, it is inquired whether or not to edit the displayed characteristic data, and if the editing is instructed, the controller 2 as the output data editing means deletes the data outside the rated full output power range from the graph, and if necessary. For example, after the graph whose scale is changed to make it easier to see is displayed again on the display unit 5, the process returns to the determination of whether or not to print the data.

If the output data has not been edited, an inquiry is made to the operator as to whether or not to perform re-measurement.
In the case of re-measurement, the measurement conditions to be changed which are instructed by the operator are read and set again, and the process returns to the measurement cycle. When further examination is required, for example, when an abnormality is found or felt in the graph, by displaying or printing all data as a table as shown in FIG. 18, more detailed information than the graph can be obtained.

The characteristic data shown in FIG. 18 are the input current Iin and input power W which are the measurement data in the fourth embodiment.
in, apparent data VAin, total output power Wout, W (converted) obtained by calculating from input data Vin, output data Vout, and their measured data and measurement data not displayed.
Efficiency, VA efficiency, power factor, and rated output power of 135.3 W
FIG. 6 shows an example of printing on the display unit 5 or printing by the recording unit 6 using the ratio RL (%) of the total output power Wout to the variable as a variable. If the measurement data is stored in an external storage device such as a hard disk or a floppy disk together with the measurement conditions and the like, a graph or a table can be output again and reconsidered if a problem occurs later.

The fifth aspect of the evaluation system according to the fifth aspect of the present invention.
The configuration of the embodiment and the DC power supply are the same as the related evaluation system 10 shown in FIG. 1 and the DC power supply 11 of the third embodiment, respectively, and thus the description is omitted. In the fifth embodiment, for example, the input voltage is set to the rated value and the upper and lower limits, respectively, the ripple voltage and the ripple noise voltage are measured while changing the load current, and the characteristics are evaluated from the change and the like.

FIG. 21 is an explanatory diagram showing an example of a ripple voltage and a ripple noise voltage. Generally, the ripple voltage is AC
The influence of the alternating voltage of the power supply appears mainly in the DC output as a power supply frequency or a frequency component that is twice the power supply frequency. However, unlike the dropper method, the chopper method and the switching method use the higher frequency component as a higher frequency component. The superimposed and the superimposed AC voltage PP is the ripple voltage. The effect of noise generated by chopping or switching also appears on the DC output and becomes a noise voltage.
The P voltage is a ripple noise voltage, and a voltage obtained by removing a noise component from the ripple noise voltage by an LP filter is measured as a ripple voltage.

FIG. 20 is a flowchart showing an example of a routine for measuring the load fluctuation characteristics of the ripple voltage and the ripple noise voltage in the fifth embodiment. FIG. 22 is a diagram showing an example of a display of a characteristic graph obtained by the routine. Where the horizontal axis is% scale with respect to the rated load current, and the vertical axis is in mV.

Ripple and ripple noise voltage measurement are selected from the evaluation menu, and the input / output rated specifications of the corresponding DC power supply are read from the registration list. Then, the measurement conditions are set based on the specifications, and the display section is displayed. In FIG. 5, the horizontal axis is the rated load current, and the vertical axis is the scale with the maximum value of the ripple noise voltage as the maximum value, and the graph frame of the characteristic graph shown in FIG. 22 is displayed.

Next, measurement conditions are input from the operation unit 4 using the selection keys. If the maximum value of the load current is the rated value, the input is omitted, and the step value, the input voltage (supply voltage) and the step value Enter For example, when the output A of the DC power supply 11 is measured, the output rated value is DC2.
Since it is 0V / 4A, the step value of the load current is the standard value 1
0% (0.4A), input voltage rated value AC100V
Input voltage is minimum 85V, rated value 100 from ± 15%
V, maximum value 115V, and therefore its step value 15V
And

The flow chart of the ripple voltage / ripple noise voltage measurement routine shown in FIG. 20 is almost the same as the overload characteristic routine of the third embodiment shown in FIG. 14 except for the measurement data. I do. When an instruction to start measurement is input from the operation unit 4, the rated load of the output B (5.1V / 3A = 1.7Ω) is set in the power tester 8b, and the minimum value of the input rated voltage is set in the AC stabilized power supply 1. Is set as the first set value of the supply voltage.

Next, it is determined whether or not the input voltage Vin has exceeded the maximum value, the load resistance of the power supply tester 8a is set to ∞, and a load fluctuation cycle is started. First, the output voltage Vout, the ripple voltage Vr, the ripple noise voltage Vrn is measured and output to the controller 2, and the controller 2 stores the measured data in the memory 3 and removes the output voltage,
The plot is displayed according to the scale of the graph frame displayed on the display unit 5.

Next, it is determined whether or not the measured output voltage Vout is equal to or lower than a preset limit voltage (for example, 0.5 V) and whether or not the load current Iout has reached the maximum value. If neither is true, the load is changed and the process returns to the measurement, and the load change cycle is repeated. If either one is acceptable, a new supply voltage (input condition) obtained by adding a step value to the supply voltage is set in the AC stabilized power supply 1, and the process returns to the determination of the input voltage Vin.

When it is determined that the input voltage Vin has exceeded the maximum value, the horizontal axis 0 to 100 on the same screen on the display unit 5
%, The ripple voltage V is plotted in a graph frame of 0 to 20 mV on the vertical axis.
Three characteristic graphs in which r and ripple noise voltage Vrn are indicated by a solid line and a broken line are formed independently for each input voltage.

Next, an inquiry is made as to whether or not to print the characteristic graph. After processing according to the instruction, the operator is inquired as to whether or not to combine the characteristic graph. If the operator determines that the characteristic graphs having different input voltages are not overlapped even on the same frame and instructs the combination, the controller 2 combines the characteristic graphs and performs the ripple as shown in FIG. After displaying the graph of the voltage and the ripple noise voltage on the display unit 5, the process returns to the determination of whether or not to print.

In this synthesized characteristic graph, generally, when the input voltage is low, the ripple voltage and the ripple noise voltage are both high, and when the input voltage is high, the ripple voltage and the ripple noise voltage are both low and do not overlap each other. Since Vrn is always higher than the ripple voltage Vr shown by the solid line (matched in the dropper method without noise), it is easy to discriminate.

The description of the routine after the re-measurement determination will be omitted. However, when the measurement of the output A and the data output thereof are completed, the output B is similarly measured by the power supply tester 8b and processed in exactly the same manner.

The sixth aspect of the evaluation system according to the sixth aspect of the present invention.
The configuration of the embodiment and the DC power supply are the same as the related evaluation system 10 shown in FIG. 1 and the DC power supply 11 of the first embodiment, respectively, and thus the description is omitted. In the sixth embodiment, for example, the input voltage is set to either the rated value or the upper and lower limit values, the output voltage is measured at predetermined intervals, and the initial drift characteristic is evaluated from the change.

The sixth embodiment differs from the related evaluation system in that, for example, the timer provided in the controller 2 outputs the output voltage Va according to a signal output at predetermined intervals within a designated total measurement time. , Vb, and that the controller 2 as the time axis switching means can switch and set the time axis of the characteristic graph to a linear scale or a logarithmic scale by operating a key or the like.

FIG. 23 is a flowchart showing one example of a routine for measuring the initial drift characteristic of the output voltage in the sixth embodiment. FIG. 24 is an example of output of characteristic data obtained by the routine, and FIGS. FIG. 2 is a diagram showing a display example of a characteristic graph, and the time axis of the same characteristic graph is shown in FIG.
5 is a linear scale in minutes, and FIG. 26 is a logarithmic scale in seconds.

Select the initial drift characteristic measurement from the evaluation menu, read out the input / output rating specification of the corresponding DC power supply from the registration list, and input the measurement condition. Based on the specification and the input condition, the measurement condition is determined. The display unit 5 displays the graph frame of the characteristic graph shown in FIG. 25, with the horizontal axis representing the time axis of the linear scale, and the vertical axis representing the voltage fluctuation rate centered on zero as a% scale.

The measurement conditions to be input are input voltage Vin,
The total measurement time Tmax, the allowable fluctuation range, and the like. The candidate values of the input voltage Vin are, for example, 70%, 80%,
90% ... 130%, but here the standard value is 100%
And The total measurement time Tmax is the candidate value 6 minutes, 15
Minute, 30 minutes, 60 minutes, and 120 minutes are set to a general standard value of 30 minutes. If the allowable fluctuation range is not specified,
± 3% is set as a standard value at 1% on one scale with some allowance.

Although the interval (time interval) can be designated, it is usually automatically set according to the total measurement time. Further, the fluctuation rate of the output voltage is based on the output voltage Vs of each output immediately after the DC power supply 11 is turned on, and the fluctuation rate = (Vt−Vs) / Vs × 100% from the output voltage Vt after the lapse of the time T. Is calculated.

The routine for measuring the initial drift characteristic will be briefly described with reference to the flowchart shown in FIG. When the operation is started, first, initial setting is performed.
The graph frame of the characteristic graph shown in FIG. In other words, the horizontal time axis is 5 minutes per scale from zero to Tmax 30 minutes, and the vertical axis is 1% per scale with the voltage fluctuation rate centered on zero.
Is displayed up to ± 3%.

Next, the output voltages Va and Vb are measured and output to the controller 2, and the voltage fluctuation rates are calculated and stored, respectively, and are plotted and displayed on the display unit 5. Next, it is determined whether or not the content (elapsed time) T of the timer has reached the total measurement time Tmax. If not, an interval ΔT is added to the content of the timer to make T = T + ΔT, and the next signal is output from the timer. The measurement of Va and Vb is repeated at the same time. If the fluctuation rate exceeds ± 3% during the measurement, one scale is automatically switched from 1% to 2% to make the display range ± 6%, so that most drifts can be covered.

When the elapsed time T reaches the total measurement time Tmax, the display unit 5 displays the characteristic graph shown in FIG. Here, solid lines and broken lines indicate outputs A and B, respectively.
Of the output voltages Va and Vb. Next, data editing is performed, including time axis switching between a linear scale and a logarithmic scale and a scale change. In this example, the time axis is switched to a logarithmic scale in units of seconds, and the fluctuation rate is changed from 1% per scale to 0.1%.
The scale is enlarged to 5%, and the characteristic graph shown in FIG. 26 is displayed again.

As shown in FIGS. 25 and 26, when a plot is displayed during measurement, the progress of time and the remaining time can be easily understood by using the linear scale. In addition, the logarithmic scale is superior in that it is easy to find when there is an abnormality in the initial drift characteristic, and therefore is suitable for printing in the recording unit 6 and leaving a record. Furthermore, if the time axis can be switched even during measurement, an abnormality can be found in real time. The description of the routine after data selection is omitted. However, since this initial drift characteristic is mainly for evaluating the fluctuation of the output voltage due to the temperature rise after the power supply of the DC power supply 11 is turned on, it is generally not possible to change the conditions immediately after the end of the measurement and perform the measurement again. If the re-measurement is necessary, the power of the DC power supply 11 is turned off, and the measurement is performed again after sufficiently cooling to room temperature.

The characteristic data shown in FIG. 24 shows an example in which measurement data is sampled and output every 1.5 minutes of elapsed time, and the measurement is performed in units of seconds. Therefore, this does not mean that the measurement was performed alternately or randomly for 1 minute or 2 minutes.

A seventh aspect of the evaluation system according to the seventh aspect of the present invention.
The configuration of this embodiment is the same as that of the second embodiment shown in FIG. The rated specification of the DC power supply 21 is input AC 100 V ± 20%, and output A,
B and C are DC5V / 3A and DC18V / 0.5, respectively.
A, DC 24V / 3A.

In the seventh embodiment, a load condition is variably set such that an output A is specified first so that the load current sequentially changes from zero to 120% of the rated load current at a predetermined step value. Load conditions are set for B and C such that the rated load current flows. Each time the load current of the output A changes, the output voltage of each output is measured and the rate of change is obtained, and data on the load change characteristics of the output A and the mutual change characteristics of the outputs B and C are obtained. Next, after specifying the output B and performing the same processing,
Further, by specifying the output C, the respective load fluctuation characteristics and mutual fluctuation characteristics are obtained.

FIG. 27 is a flow chart showing an example of a load variation and mutual variation characteristic measurement routine in the seventh embodiment. FIG. 28 is an output example of characteristic data obtained by the routine, and FIGS. It is a diagram which shows the example of a display of a characteristic graph, respectively. As the measurement conditions, the input voltage Vi
n is 100% (100V) of the standard value, and the load current range is 120% of the rated load current of each output specified from zero.
Up to the candidate values 1%, 2%, 5%, 10
%, Select a standard value of 5% from 20%.

When the fluctuation range of the output voltage is specified,
One scale may be selected so that the value falls within the maximum positive / negative frame. However, when it is not specified, the candidate values of one scale are 0.5%, 1%, 2%, 4%, 8%, and 16%. % Out of
Here, 16% is selected with sufficient margin, but 4% is selected.
Automatic correction may be performed when% and 8% are selected and exceeded.

In the seventh embodiment, the rate of change of each output is based on each output voltage Vr when the load condition is set so that all outputs are at the rated load current, when the load condition is arbitrary. Is calculated from the output voltage V of the following equation: fluctuation rate = (V−Vr) / Vr × 100%.

That is, in the output example of the characteristic data shown in FIG. 28, since the outputs B and C are rated loads, each output voltage Vr when the output A is at the rated load (current 100%).
Indicates that the output A is 5.079 V, the output B is 17.896 V,
Output C is 24.020V.

The load variation and mutual variation characteristic measurement routine will be briefly described with reference to the flow chart shown in FIG. 27, taking as an example the case where output A is designated. When the process is started, first, initial settings are performed. After the outputs A, B, and C are loaded with the rated loads of 1.667Ω, 36Ω, and 8Ω, respectively, and the reference output voltage Vr is measured, only the output A is open, that is, ∞. And the horizontal axis of the display unit 5 is 0 to 12
0%, the vertical axis is ± 48 at 16% per scale centered at zero
The graph frame of% is displayed.

In the measurement cycle, each output voltage Va, V
After measuring and storing b and Vc, the fluctuation rate is calculated from the measured data and the reference output voltage, and is plotted and displayed in the graph frame of the display unit 5. Next, when the load current I of the output A is 1
It is determined whether or not the measured maximum value Imax of 20% has been reached,
If not, a step value ΔI = 0.15A is added and I = I
+ ΔI, reset the load resistance corresponding thereto, and return to the output voltage measurement.

[0172] If now the measured maximum value Imax, determines whether to perform data editing watches characteristic graph displayed on the display unit 5. Scale 8% 16% 1 graduation in this example
A characteristic graph showing that redisplay performed Lumpur changes 29, output A, B, solid lines the variation rate and C, the dotted line are indicated by broken lines. Further, it is determined whether or not to perform data selection. In the characteristic graph shown in FIG. 30, only the output C is selected and displayed again without changing the scale.

After determining whether or not to print the characteristic data and the characteristic graph, it is determined whether or not to perform re-measurement. First, if an input is made so as to designate the output B and the output C following the output A, this determination automatically proceeds to re-measurement, changes the instruction output, and returns to the initial setting. If remeasurement is unnecessary, go to the end.

FIG. 31 is a block diagram showing a configuration of an eighth embodiment of the evaluation system according to the present invention.
The same reference numerals are given to the same portions as those of the related evaluation system shown in FIG.

The difference between the evaluation system 30 and the related evaluation system is that the waveforms of the AC input voltage of the DC power supply 31 and the DC output voltages of the outputs A and B are stored and displayed under the control of the controller 2. Oscilloscope 9
And a transformer 32 for insulating the AC input in a DC manner. The stored waveform data can be output to the controller 2.

The rated specifications of the DC power supply device 31 of the eighth embodiment are as follows: input AC 100 V ± 20%;
Is DC5.1V / 3A and DC24V / 3A,
It is the same as the DC power supply 11 of the second embodiment, and the rated load resistance is 1.7Ω and 8Ω, respectively.

FIG. 32 is a flow chart showing an example of a dynamic input fluctuation characteristic measurement routine according to the eighth embodiment.
3 is an explanatory diagram showing an example of a dynamically fluctuating input voltage waveform, and FIG. 34 is an output in which the input voltage shown in FIG. 33 and the output voltage waveform generated thereby are displayed on the display unit 5 or printed by the recording unit 6. It is an example.

Select the dynamic input fluctuation characteristic measurement from the evaluation menu, read out the input / output rating specification of the corresponding DC power supply from the registration list, and enter the measurement conditions. Based on the specifications and the input conditions, The measurement conditions are set, and the display unit 5 displays time on the horizontal axis and voltage on the vertical axis.
The graph frames of four characteristic graphs are displayed in an array as shown in FIG. Since the horizontal axis is set to, for example, 50 ms on one scale, a waveform phenomenon for 0.5 seconds is displayed in the graph frame, and the scale of the oscilloscope is similarly set by the instruction of the controller 2.

Hereinafter, together with a ninth embodiment to be described later, all times are set to AC regardless of whether the frequency is 50 Hz or 60 Hz.
A description will be given in units of a cycle of AC power supplied from the stabilized power supply 1 to the DC power supply device 31.

The measurement conditions to be input are the power supply frequency, the first
And the second supply voltage values V1 and V2, the measurement period and the application time of V2, the load conditions of the outputs A and B, and the like. The power supply frequency is initially set to 50 Hz or 60 Hz, for example, 50 Hz as the standard value in the AC stabilized power supply 1 by the controller 2, but can be switched by operating a function key of the operation unit 4 which is a frequency switching key. .

A first supply voltage value V1 which is always set;
The second supply voltage value V2 set only for the application time in the specified measurement cycle is selected from candidate values 70%, 80%... 130% similarly to the setting of the supply voltage value already described. As the standard values, the lower limit value (V1 = 80%) and the upper limit value (V2 = 120%) of the rated input voltage range of the DC power supply 31 are initialized. There are two types of measurement cycles, for example, 20 cycles and 50 cycles, but 20 cycles are initially set as a standard value by the controller 2 and can be switched by a function key as cycle switching means.

In the eighth embodiment, for example, in the eighth embodiment, one cycle is set as a unit, and one unit, that is, one cycle, is initially set by the controller 2 as the dynamic load time setting means. , Can be corrected by ± 1 cycle using a subtraction key or the like. By operating the addition key or the subtraction key by designating with the numeric keypad, the correction may be made more significantly and quickly. The load conditions of the outputs A and B can be set in the same manner as the setting of the load conditions described above. However, a rated load determined from a rated voltage and a rated current is initially set as a standard value.

A routine for measuring the dynamic input fluctuation characteristic, that is, the response characteristic of the output voltage to the instantaneous fluctuation of the AC voltage will be described with reference to the flowchart shown in FIG. When started, first, the waveform of the input / output voltage under the measurement conditions set to the respective standard values is displayed on the oscilloscope 9 and at the same time is also displayed on the upper left graph frame of the display unit 5.

The oscilloscope 9 is composed of, for example, a three-phenomenon synchroscope having a digital waveform memory, and starts sweeping in response to a start signal from the controller 2. The input voltage is stepped down by a transformer 32 which also serves as DC isolation, and the output voltages of the outputs A and B are, for example, 1 graduation 1V, 5
V, each of them is input, A / D converted, and stored in a built-in memory. The stored waveform data is displayed on the CRT of the oscilloscope 9 and output to the controller 2 to be displayed on the four graph frames of the display unit 5 in a cyclic manner, for example, in the order of upper left, upper right, lower left, and lower right every time measurement is performed. Is displayed.

The operator observes the displayed waveform to determine the presence / absence and the degree of the abnormality, and immediately prints the image, changes the measurement conditions and re-measures and arranges a plurality of characteristic graphs, and then prints. Decide whether to print at all and instruct. Next, in accordance with an instruction as to whether or not to perform re-measurement, the process proceeds to an end if no, and to a condition change routine if re-measurement.

Since the condition changing routine is clear from the flowchart, it will be briefly described. The frequency (50/60 Hz) and the measurement cycle (20/50 cycles) are switched if necessary according to the operator's instruction to be input next, and the addition key or the subtraction key is operated to correct the application time next time. ± 1
Modify each unit (one cycle). Further, the first supply voltage value V1 and the second supply voltage value V2 are switched if necessary.

In the next voltage exchange, the values of the first and second supply voltage values are exchanged. That is, if the first and second supply voltage values up to that point are Vx and Vy, the first voltage is exchanged and the first voltage value is exchanged. And the second supply voltage values are Vy and Vx. Since V1 <V2 was automatically set at the time of the initial setting, a response characteristic to an instantaneous boost of the input voltage was obtained. In order to obtain a response characteristic to an instantaneous step-down, the first and second supply voltage values may be changed so as to satisfy V1> V2, but it takes twice. According to this voltage exchange, it is possible to switch between the instantaneous step-up mode and the instantaneous step-down mode with one simple operation. Upon completion of the above condition change routine, the process returns to the previous state, and the waveforms of the input and output voltages under the changed measurement conditions are displayed.

As described above, the dynamic input fluctuation characteristic (along with the instantaneous power failure characteristic described later) can be obtained in a very short time (about 0.5 seconds), and the scale of the output voltage waveform can be enlarged if necessary. Can be measured, but it is mainly to observe the presence / absence of the abnormality of the waveform and the degree thereof. Therefore, the measurement condition is changed and the measurement is repeated. Therefore, the effect of providing the measurement condition changing means (controller 2) which can change the measurement conditions by a simple operation even during the execution of the measurement, display or printing is great.

Note that the input voltage waveforms shown in FIG. 33 each have a measurement cycle of 20 cycles,
(A) and (B) are examples of instantaneous boosting in which the second supply voltage value V2 is higher than the first supply voltage value V1, and FIGS.
(D) shows an example of the instantaneous step-down of V2 <V1. FIGS. 33A and 33C show waveform examples when the application time is one cycle, and FIGS. 33B and 33D show waveform examples when the application time is 10 cycles.

In the display example of the display unit 5 shown in FIG. 34 or the print example by the recording unit 6, (A) to (D) of FIG.
33 shows output examples of input / output voltage waveforms obtained when voltages having the waveforms shown in FIGS. 33A to 33D are input.

A ninth aspect of the evaluation system according to the ninth aspect of the present invention.
The configuration and the DC power supply of the embodiment are the same as those of the eighth embodiment shown in FIG.
Since they are the same as in the embodiment, the reference numerals are used as they are, and the description is omitted. The difference between the ninth embodiment and the eighth embodiment is that
By constantly setting the second supply voltage value V2 to zero, the response characteristic of the output voltage to the momentary power failure is measured.

FIG. 35 is a flow chart showing an example of the output voltage response characteristic to the instantaneous power failure of the power supply in the ninth embodiment, that is, an example of a routine for measuring the instantaneous power failure response characteristic. FIG. 36 shows an example of the input voltage waveform due to the instantaneous power failure. FIG. 37 shows an output example in which the input voltage shown in FIG. 36 and the output voltage waveform generated thereby are displayed on the display unit 5 or printed by the recording unit 6. When the instantaneous power failure response characteristic measurement is selected from the evaluation menu and the measurement conditions are input, four graph frames are displayed on the display unit 5 as in the eighth embodiment.

The measurement conditions to be input are a power supply frequency, a supply voltage value, a measurement cycle, a power failure time, a load condition, a phase mode, and a designation of a display position. Among them, the power supply frequency, the measurement cycle, and the load condition are the same as those in the eighth embodiment, and the power outage time is the same as the application time, and the supply voltage value is the same as the first supply voltage value V1, so that the description is omitted. . However, since the value corresponding to the second supply voltage value V2 is a power failure, that is, zero, no input or change is required, and the power failure time is one half cycle.
Unit.

The phase mode is the phase of the input voltage at the start of the power failure. In modes 1 to 4, the phases are 0 °, 90 °, and 180 °, respectively, with the origin being the zero crossing when the input voltage rises.
The power failure is set to start at {, 270}. For example, a phase mode is designated by a numeric keypad, and the mode 1, ie, 0, is initially set as a standard value. The display position can be changed by displaying the waveform displayed on the oscilloscope 9 on the display unit 5.
The upper left, the upper right, the lower left, and the lower right are designated by the ten keys 1 to 4 respectively, or are changed cyclically according to the change designation. Sometimes the upper left (mode 1) is set.

The measurement routine of the instantaneous power failure response characteristic is as follows.
A description will be given with reference to the flowchart shown in FIG. 35.
Since it is completely the same as the eighth embodiment shown in FIG. 2, the description is omitted. The correction of the power outage time is the same as the correction of the application time in the eighth embodiment except that the correction is performed in units of ± 0.5 cycle since the half cycle is one unit, and the voltage change is also performed by the first supply voltage value V1. Is the same as the change in

The phase mode can be changed, if necessary, by designating 1 to 4 using the numeric keypad. The response characteristics due to the change in the phase mode hardly change when the power failure time is relatively long, but the response characteristics due to the phase mode change remarkably as the power failure time becomes shorter depending on the DC power supply 31. It is effective to change the phase mode by the controller 2 or the like. The same can be said for the eighth embodiment.

Changing the display position, that is, designating or changing the display position, is equivalent to displaying the waveform immediately before the display unit 5 when the next waveform after changing the measurement conditions is displayed. The waveform in the frame is erased, and the next waveform is displayed. If the display position is changed, the next waveform is displayed in the changed graph frame, and the previous waveform remains. Therefore, if the previous waveform is normal and does not need to be recorded, it can be deleted without changing the display position, and when a waveform abnormality is recognized, the position is changed and left, and four cases are prepared. At this time, printing may be performed by the recording unit 6.

Alternatively, the waveform displayed on the oscilloscope 9 may not be transferred to the display unit 5 each time, but may be displayed on the display unit 5 when there is a problem. At this time, the display devices may be specified or arranged in order. The same effect can be obtained by applying this display position change to the eighth embodiment together with the phase mode change.

Note that the input voltage waveform shown in FIG. 36 is a case where the measurement cycle is 20 cycles, and that the input voltage Vin is 80% in (A) and (B) of FIG. ) And (D)
Is 120%, and the power outage time and the phase mode are respectively
(A) of this figure is 0.5 cycles, mode 1, and (B) of this figure is 2.5 cycles, mode 2, (C) of the figure is 5 cycles,
Mode 3, FIG. 4D shows an example of 7.5 cycles and mode 4.

In the display example of the display unit 5 shown in FIG. 37 or the print example by the recording unit 6, (A) to (D) of FIG.
Are output examples of input / output voltage waveforms obtained when voltages having the waveforms shown in FIGS. 36A to 36D are input.

As described above, the evaluation system according to the present invention sets a value corresponding to the measurement condition most used when each characteristic is measured as a standard value, and practically applies the value to almost any measurement condition. Since the configuration is such that it can be easily changed, the measurement time is greatly reduced and the working efficiency is improved.

Further, since setting, change, and correction of various measurement conditions are performed by selection or switching by keys, a short time is required, and at the same time, a mistake and a time for re-measurement due to the mistake are greatly reduced. . In addition, the provision of the shortcut means prevents an excessive current from flowing for a long time and damages the DC current device even when a setting error or an increase in load occurs, thereby cutting unnecessary measurement time.

Furthermore, by providing means such as scale change, data selection, data editing, time axis switching, etc., after confirming a large amount of characteristic data obtained by characteristic measurement, a necessary characteristic graph can be displayed in a graph that is easy to see. The problem can be easily found because the data is summarized or the characteristic data is printed. On the other hand, if a large amount of measurement data and characteristic data are recorded on a disk or the like, it can be redisplayed and examined again later if a problem occurs.

[0204]

As described above, the DC power supply evaluation system according to the present invention can obtain reliable data in a short time without manual operation, and can obtain result data in a form that can be easily determined. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of first, third, fifth and sixth embodiments of the present invention.

FIG. 2 is a flowchart showing an example of an output voltage input fluctuation characteristic measurement routine in a related evaluation system.

FIG. 3 is a diagram illustrating an output example of input fluctuation characteristic data of an output voltage.

FIG. 4 is a diagram showing a display example of a graph of the characteristic data shown in FIG. 3;

FIG. 5 is a diagram showing another display example of the graph of the characteristic data shown in FIG. 3;

FIG. 6 is a flowchart illustrating an example of an output voltage fluctuation characteristic measurement routine for input voltage up / down according to the first embodiment.

FIG. 7 is a diagram illustrating an example of output of output voltage fluctuation characteristic data with respect to input voltage up / down.

8 is a diagram showing a display example of a graph of the characteristic data shown in FIG. 7;

FIG. 9 is a diagram showing another display example of the graph of the characteristic data shown in FIG. 7;

FIG. 10 is a block diagram showing the configuration of the second, fourth and seventh embodiments of the present invention.

FIG. 11 is a flowchart illustrating an example of a routine for measuring input fluctuation characteristics of input current, input / output power, and efficiencies of the second embodiment.

FIG. 12 is a diagram illustrating an output example of input fluctuation characteristic data of input current, input / output power, and respective efficiencies.

FIG. 13 is a diagram showing a display example of a graph of the characteristic data shown in FIG. 12;

FIG. 14 is a flowchart illustrating an example of an output voltage load fluctuation characteristic measurement routine according to the third embodiment.

FIG. 15 is a diagram showing a display example of a load fluctuation characteristic graph of an output voltage.

FIG. 16 is a diagram showing another display example of the load fluctuation characteristic graph of the output voltage.

FIG. 17 is a flowchart showing an example of a routine for measuring load fluctuation characteristics of input current, input / output power, and efficiencies of the fourth embodiment.

FIG. 18 is a diagram showing an output example of input current, input / output power, and load fluctuation characteristic data of each efficiency.

FIG. 19 is a diagram showing a display example of a graph of the characteristic data shown in FIG. 18;

FIG. 20 is a flowchart illustrating an example of a load fluctuation characteristic measurement routine of a ripple voltage and a ripple noise voltage according to the fifth embodiment.

FIG. 21 is an explanatory diagram illustrating an example of a ripple voltage and a ripple noise voltage.

FIG. 22 is a diagram illustrating a display example of a load fluctuation characteristic graph of a ripple voltage and a ripple noise voltage.

FIG. 23 is a flowchart showing an example of an output voltage initial drift characteristic measurement routine of the sixth embodiment.

FIG. 24 is a diagram illustrating an output example of initial drift characteristic data of an output voltage.

FIG. 25 is a diagram showing a display example of a graph of the characteristic data shown in FIG. 24;

26 is a diagram showing another display example of the graph of the characteristic data shown in FIG. 24.

FIG. 27 is a flowchart showing an example of a load variation and mutual variation characteristic measurement routine of the output voltage of the seventh embodiment.

FIG. 28 is a diagram illustrating an example of output of load fluctuation and mutual fluctuation characteristic data of an output voltage.

FIG. 29 is a diagram showing a display example of a graph of the characteristic data shown in FIG. 28;

FIG. 30 is a diagram showing another display example of the characteristic data graph shown in FIG. 28;

FIG. 31 is a block diagram showing the configuration of the eighth and ninth embodiments of the present invention.

FIG. 32 is a flowchart showing an example of a dynamic input fluctuation characteristic measurement routine of the eighth embodiment.

FIG. 33 is an explanatory diagram showing an example of a dynamically changing input voltage waveform.

34 is a diagram showing a display example of an input / output voltage waveform based on the input voltage having the waveform shown in FIG. 33.

FIG. 35 is a flowchart illustrating an example of an output voltage response characteristic measurement routine for an instantaneous power failure according to the ninth embodiment.

FIG. 36 is an explanatory diagram illustrating an example of a waveform of an instantaneous power failure of an input voltage.

FIG. 37 is a diagram showing an example of a display of an input / output voltage waveform based on the input voltage having the waveform shown in FIG. 36;

[Explanation of symbols]

1 AC stabilized power supply (stabilized AC power supply section) 2 Controller (control means, supply voltage setting means, load setting means, other means) 3 Memory 4 Operation section 5 Display section (data output section) 6 Recording section (data output section) Means) 7 AC power meter (measuring means) 8a, 8b, 8c Power tester (measuring means) 9 Oscilloscope 10, 20, 3
0 Evaluation system 11, 21, 31 DC power supply 32 Transformer

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01R 31/00 G05F 1/10

Claims (17)

(57) [Claims] 1. An input voltage of a DC power supply and a set negative
The output voltage under load conditions is measured and the DC power supply
DC power supply evaluation system for evaluating the characteristics of
The AC power of the set supply voltage value is supplied to the DC power supply.
And the regulated AC power supply to supply the measured
So that it changes in a predetermined step value
Supply voltage setting means for setting the supply voltage value of the AC power supply unit
And the load current or load power of the DC power supply is specified.
Load condition setting procedure for setting the load condition
And for each supply voltage value set by said supply voltage setting means,
Measure the input voltage and output voltage of the DC power supply respectively.
Measuring means, and measuring data obtained by the measuring means under the set load conditions.
Characteristic data of the output voltage with respect to the input voltage
A data output means for displaying or printing as a rough; and a control means for controlling the respective means, wherein the supply voltage setting means first specifies the supply voltage value.
From the lowest value to the highest value of the measured input voltage range
Increase at a predetermined step value, and then from the highest value
Means for lowering at the above step value to the minimum valueAnd The supply voltage setting means includes a plurality of voltage value selection keys and an operation thereof.
Supply specified value selected from candidate values by operation
As the minimum or maximum value of the voltage value or the measured input voltage range
Determination means, a plurality of voltage step value selection keys,
The value selected from the candidate values by the operation of
Means for determining the voltage value as the
If the pressure step value selection key is not operated,
Corresponding to the most commonly used measurement conditions
The set standard value is set to the supply voltage value or measurement input.
Minimum and maximum values of the force voltage range or the voltage step value
When Means for determining The load condition setting means includes a plurality of load selection keys and an operation thereof.
Load selected value from candidate values by operation
Or as the minimum and maximum values including zero of the measurement load range
Determination means, a plurality of load step value selection keys,
Specified the value selected from the candidate values by the operation of
Means for determining as a load step value;
Key or load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Means for determining as a loop value Characterized by
Power supply evaluation system. 2. An input voltage, an input current and an input voltage of a DC power supply.
Measure the input power and the output voltage under the set load conditions.
DC power supply to evaluate the characteristics of the DC power supply
In the evaluation system, the AC power of the set supply voltage value is supplied to the DC power supply device.
And the regulated AC power supply to supply the measured
So that it changes in a predetermined step value
Supply voltage setting means for setting the supply voltage value of the AC power supply unit
And the load current or load power of the DC power supply is specified.
Load condition setting procedure for setting the load condition
And for each supply voltage value set by said supply voltage setting means,
The input voltage, input current, input power and output of the DC power supply
Measuring means for measuring force voltages, and measuring data obtained by the measuring means with the set load conditions
Current, input power and output for input voltage at
From the voltage or each measurement data by the means
Apparent power, output power, conversion efficiency, VA efficiency, power
Rate or other characteristic data or their graphs,
Display on the same screen or paper on two or more combinations
Data output means for printing on a surface, and control means for controlling each of the meansAnd The supply voltage setting means includes a plurality of voltage value selection keys,
In the candidate value by the operation The value selected from
Supply voltage or the lowest and highest values of the measured input voltage range
A plurality of voltage step value selection keys,
The value selected from the candidate values by the operation is
Means for deciding as a tap value, and the voltage value selection key or
If the voltage step value selection key is not operated,
It corresponds to the measurement conditions most used when measuring the characteristics.
The supply voltage value or the standard value
Minimum and maximum values of the input voltage range or the above voltage steps
Means for determining as a value, The load condition setting means includes a plurality of load selection keys and an operation thereof.
Load selected value from candidate values by operation
Or as the minimum and maximum values including zero of the measurement load range
Determination means, a plurality of load step value selection keys,
Specified the value selected from the candidate values by the operation of
Means for determining as a load step value;
Key or load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Means for determining as a loop value Characterized by
Power supply evaluation system. 3. An input voltage of a DC power supply and a set negative voltage.
The output voltage under load conditions is measured and the DC power supply
DC power supply evaluation system for evaluating the characteristics of
The AC power of the set supply voltage value is supplied to the DC power supply.
The specified stabilized AC power supply and the supply voltage value of the stabilized AC power supply are specified.
Supply voltage setting means for setting the load current of the DC power supply to zero or a designated measurement
Specified between the minimum value and the maximum value of the load current range
Variable setting of the load condition so that it changes sequentially with the step value
Load condition setting means, and load conditions sequentially set by the load condition setting means.
The input voltage of the DC power supply for each load current value
And a measuring means for measuring the output voltage and a load at the set supply voltage.
Output voltage vs. current characteristic data or its graph
Data output means for displaying or printing the data, and control means for controlling each of the means.And The supply voltage setting means includes a plurality of voltage value selection keys,
The value selected from the candidate values by the operation
Supply voltage or the lowest and highest values of the measured input voltage range
A plurality of voltage step value selection keys,
The value selected from the candidate values by the operation is
Means for deciding as a tap value, and the voltage value selection key or
If the voltage step value selection key is not operated,
It corresponds to the measurement conditions most used when measuring the characteristics.
The supply voltage value or the standard value
Minimum and maximum values of the input voltage range or the above voltage steps
Means for determining as a value, The load condition setting means includes a plurality of load selection keys and an operation thereof.
Load selected value from candidate values by operation
Or as the minimum and maximum values including zero of the measurement load range
Determination means, a plurality of load step value selection keys,
Specified the value selected from the candidate values by the operation of
Means for determining as a load step value;
Key or load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Means for determining as a loop value Characterized by
Power supply evaluation system. 4. An input voltage, an input current and an input voltage of a DC power supply device.
Measure the input power and the output voltage under the set load conditions.
DC power supply to evaluate the characteristics of the DC power supply
In the evaluation system, the AC power of the set supply voltage value is supplied to the DC power supply device.
The specified stabilized AC power supply and the supply voltage value of the stabilized AC power supply are specified.
Means for setting the supply voltage to the specified value, and from the minimum value to the maximum value of the specified measured load power range.
Between the steps in a predetermined step value, or
The negative power is applied so that the load power of the DC power supply becomes zero.
Load condition setting means for variably setting load conditions, and load conditions sequentially set by the load condition setting means
The input power of the DC power supply is
Voltage, input current, input power and output voltage, respectively.
Measuring means, and each measurement data by the means, the set supply voltage
Current, input power and output for load power at
From the voltage or each measurement data by the means
Apparent power, output power, conversion efficiency, VA efficiency, power
Rate or other characteristic data or their graphs,
Display on the same screen or paper on two or more combinations
Data output means for printing on a surface, and control means for controlling each of the meansAnd The supply voltage setting means includes a plurality of voltage value selection keys,
The value selected from the candidate values by the operation
Supply voltage or the lowest and highest values of the measured input voltage range
A plurality of voltage step value selection keys,
The value selected from the candidate values by the operation is
Means for deciding as a tap value, and the voltage value selection key or
If the voltage step value selection key is not operated,
It corresponds to the measurement conditions most used when measuring the characteristics.
The supply voltage value or the standard value
Minimum and maximum values of the input voltage range or the above voltage steps
Means for determining as a value, The load condition setting means includes a plurality of load selection keys and an operation thereof.
Load selected value from candidate values by operation
Or as the minimum and maximum values including zero of the measurement load range
Determination means, a plurality of load step value selection keys,
Specified the value selected from the candidate values by the operation of
Means for determining as a load step value;
Key or load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Means for determining as a loop value Characterized by
Power supply evaluation system. 5. An input voltage of the DC power supply and a set negative voltage.
Measures ripple voltage and ripple noise voltage under load conditions
DC power supply to evaluate the characteristics of the DC power supply
In the evaluation system of (1), the AC of the supply voltage value set for the DC power supply
A stabilized AC power supply for supplying power and the supply voltage value in the stabilized AC power supply are designated.
Supply voltage setting means for setting the load current of the DC power supply to zero or a designated measurement
Specified between the minimum value and the maximum value of the load current range
Variable setting of the load condition so that it changes sequentially with the step value
Load condition setting means, and load conditions sequentially set by the load condition setting means.
For each load current value, the output of the DC power supply
Measuring method for measuring the measured ripple voltage and ripple noise voltage
And a load at the set supply voltage.
Characteristic data of ripple voltage and ripple noise voltage with respect to current
Data to be displayed or printed as data or its graph
Output means; and control means for controlling each of the means.Provided, The supply voltage setting means includes a plurality of voltage value selection keys,
The value selected from the candidate values by the operation
Supply voltage or the lowest and highest values of the measured input voltage range
A plurality of voltage step value selection keys,
The value selected from the candidate values by the operation is
Means for deciding as a tap value, and the voltage value selection key or
If the voltage step value selection key is not operated,
It corresponds to the measurement conditions most used when measuring the characteristics.
The supply voltage value or the standard value
Minimum and maximum values of the input voltage range or the above voltage steps
Means for determining as a value, The load condition setting means includes a plurality of load selection keys and an operation thereof.
Load selected value from candidate values by operation
Or as the minimum and maximum values including zero of the measurement load range
Determination means, a plurality of load step value selection keys,
Specified the value selected from the candidate values by the operation of
Means for determining as a load step value;
Key or load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Step Means for determining as a value Characterized by
Power supply evaluation system. 6. An input voltage of a DC power supply and a set negative
The output voltage under load conditions is measured and the DC power supply
DC power supply evaluation system for evaluating the characteristics of
The AC of the supply voltage value set for the DC power supply
A stabilized AC power supply for supplying power and the supply voltage value in the stabilized AC power supply are designated.
Supply voltage setting means for setting the load value or the load current of the DC power supply
Load condition setting procedure for setting the load condition
Column and the specified or said total during the specified total measurement time
At a time interval set according to the measurement time, the DC voltage
Measuring means for measuring the output voltage of the apparatus; and measuring the measured data to the set supply voltage and load conditions.
Characteristic data of the output voltage with respect to the elapsed time in
Data output means for displaying or printing as a graph, and control means for controlling each of the means.Provided, The supply voltage setting means includes a plurality of voltage value selection keys,
The value selected from the candidate values by the operation
Supply voltage or the lowest and highest values of the measured input voltage range
A plurality of voltage step value selection keys,
The value selected from the candidate values by the operation is
Means for deciding as a tap value, and the voltage value selection key or
If the voltage step value selection key is not operated,
It corresponds to the measurement conditions most used when measuring the characteristics.
The supply voltage value or the standard value
Minimum and maximum values of the input voltage range or the above voltage steps
Means for determining as a value, The load condition setting means includes a plurality of load selection keys and an operation thereof.
Load selected value from candidate values by operation
Or as the minimum and maximum values including zero of the measurement load range
Determination means, a plurality of load step value selection keys,
Specified the value selected from the candidate values by the operation of
Means for determining as a load step value; The load selection key
Key or load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Means for determining as a loop value Characterized by
Power supply evaluation system. 7. An input voltage of a DC power supply and a set negative
The output voltage under load conditions is measured and the DC power supply
Evaluation System for Multi-Output DC Power Supply Unit
An AC of a supply voltage value set for the DC power supply device.
A stabilized AC power supply for supplying power and the supply voltage value in the stabilized AC power supply are designated.
Supply voltage setting means for setting the load current to a specified value;
Is the minimum to maximum of the specified measured load current range
Up to the specified step value so that
Variable setting of load conditions and designation of other outputs
Load condition setting means for setting the specified load condition, and the output specified by the load condition setting means in order.
For each load current value according to the load condition set next,
Measuring means for measuring the output voltage of each power supply unit, and converting the measured data into the rate of change of
Negative of the specified output at the set supply voltage
Load fluctuation characteristics of the specified output against load current or other
As characteristic data of output mutual fluctuation characteristics or its graph
Data output means for displaying or printing, and control means for controlling each of the means.Provided, The supply voltage setting means includes a plurality of voltage value selection keys,
The value selected from the candidate values by the operation
Supply voltage or the lowest and highest values of the measured input voltage range
A plurality of voltage step value selection keys,
The value selected from the candidate values by the operation is
Means for deciding as a tap value, and the voltage value selection key or
If the voltage step value selection key is not operated,
Measure characteristics Corresponding to the most commonly used measurement conditions
The supply voltage value or the standard value
Minimum and maximum values of the input voltage range or the above voltage steps
Means for determining as a value, The load condition setting means includes a plurality of load selection keys and an operation thereof.
Load selected value from candidate values by operation
Or as the minimum and maximum values including zero of the measurement load range
Determination means, a plurality of load step value selection keys,
Specified the value selected from the candidate values by the operation of
Means for determining as a load step value;
Key or load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Means for determining as a loop value Characterized by
Power supply evaluation system. 8. An input voltage of the DC power supply and a set negative
The output voltage under load conditions is measured and the DC power supply
DC power supply evaluation system for evaluating the characteristics of
The AC of the supply voltage value set for the DC power supply
The stabilized AC power supply that supplies electric power and the stabilized AC power supply
Period, application time, different first and second supply voltages
The first supply voltage value is always set according to the value.
The second supply voltage value for the application time in the measurement cycle.
Supply voltage setting means for repeating setting, and a load current or a load power of the DC power supply is designated.
Load condition setting procedure for setting the load condition
And a dynamically changing supply power set by the supply voltage setting means.
Of the input and output voltages of the DC power supply at
Measuring means for measuring and storing each shape, and storing the stored measurement data in the set load condition
Frame as input and output voltage waveforms in
Data output means to be displayed or printed on the top,
Control means for controlling the step;Is established, The supply voltage setting means includes a plurality of voltage value selection keys,
In the candidate value by the operation The value selected from
Supply voltage or the lowest and highest values of the measured input voltage range
A plurality of voltage step value selection keys,
The value selected from the candidate values by the operation is
Means for deciding as a tap value, and the voltage value selection key or
If the voltage step value selection key is not operated,
It corresponds to the measurement conditions most used when measuring the characteristics.
The supply voltage value or the standard value
Minimum and maximum values of the input voltage range or the above voltage steps
Means for determining as a value, The load condition setting means includes a plurality of load selection keys and an operation thereof.
Load selected value from candidate values by operation
Or as the minimum and maximum values including zero of the measurement load range
Determination means, a plurality of load step value selection keys,
Specified the value selected from the candidate values by the operation of
Means for determining as a load step value;
Key or load step value selection key is not operated
Are the most commonly used measurement conditions when measuring each characteristic.
Load or measure the standard value with the corresponding value set
Load range minimum and maximum including zero or load step
Means for determining as a loop value Characterized by
Power supply evaluation system. 9. The DC power supply evaluation system according to claim 8, wherein said supply voltage setting means is provided with means for setting said second supply voltage value to zero. system. 10. A frequency switching key for alternately switching the frequency of AC power supplied from said stabilized AC power supply unit between 50 Hz and 60 Hz, and a frequency of 50 Hz or 60 Hz which is predetermined at an initial setting when said frequency switching key is not operated. evaluation system of the DC power supply device according to any one of claims 1 to 9 provided with means for setting the other hand to. 11. When the output voltage measured at the time of measuring the output voltage of the DC power supply device falls below a predetermined limit voltage, the measurement is performed even if the load current or the load power has not reached its maximum value. 8. Shortcut means for ending the operation or changing the setting of the supply voltage by the stabilized AC power supply unit and proceeding to the measurement under the next input voltage condition is provided. DC power supply evaluation system. 12. When the load condition setting unit measures the load current or the load power at the set supply voltage while sequentially changing the load current or the load power from zero or a minimum value to a maximum value of a measurement load range by a predetermined step value, Once the measurement has been performed, the value obtained by adding the load conditions at the time of each subsequent measurement to the output voltage and load current value or load power value measured immediately before each measurement by a predetermined step value The evaluation system for a DC power supply device according to any one of claims 3 to 5 or 7, wherein the evaluation system is a unit that sets the value using a value calculated by: 13. The unit of the application time is one cycle or half cycle of the AC power supplied from the stabilized AC power supply unit. At an initial setting unless otherwise specified, the application time is set to one unit and an addition key is set. 10. The DC power supply apparatus evaluation system according to claim 8, further comprising a dynamic load time setting unit capable of correcting the application time by one unit or an integral multiple thereof by a correction unit such as a subtraction key, a numeric keypad, or the like. 14. The data output means according to claim 1, further comprising a scale changing means for enlarging or reducing one or both of a horizontal axis and a vertical axis of a graph displayed or printed. 3. The evaluation system for a DC power supply according to claim 1. 15. After the data output means displays a plurality of characteristic data based on each of the measurement data as a graph on the same screen or in the same frame, a graph or a necessary graph is selected from various input / output items of the characteristic data. The DC power supply evaluation system according to any one of claims 1 to 9, further comprising output data selection means for selectively displaying or printing only required item data. 16. The evaluation of a DC power supply according to claim 6, further comprising time axis switching means for setting a time axis to a linear scale or a logarithmic scale according to designation when displaying or printing the graph of the characteristic data. system. 17. A method for measuring the frequency of the AC power supplied by the stabilized AC power supply unit, the first and second supply voltage values, or the load conditions set by the load condition setting means, or the measurement conditions such as the measurement period and the application time. 10. The DC power supply evaluation system according to claim 8, further comprising a measurement condition changing means which can be arbitrarily changed by an operator even during execution of display or printing.