JP4183575B2 - Power supply system and power supply device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply system that converts an external power source such as a commercial power source and supplies power to a power-supplied power supply device having a load, and particularly has a power storage function inside, even when the external power source stops. The present invention relates to a power supply system having an uninterruptible function that continues to supply power.
[0002]
[Prior art]
Some computer devices that operate by inputting a commercial power source from the outside as a main power source have an extremely high necessity for securing an operating power source even when the main power source is stopped due to a power failure or the like. For example, a security device that monitors facilities and the like corresponds to this. FIG. 1 shows a configuration diagram of a conventional security device. 1 to 5, a solid line with an arrow represents a power line such as a main power source or a battery power source, and a dotted line with an arrow represents a signal line other than the power line.
[0003]
The security device 30 detects an intruder or fire in the facility by processing a detection signal from an externally connected device such as a sensor by the CPU 36, notifies the abnormality, or monitors the outside via a telephone line. Report to the center. Therefore, in a state where the operating power supply of the security device 30 cannot be obtained, all the monitoring functions are stopped, and the state of the facility to be monitored cannot be known.
[0004]
Accordingly, the security device 30 has a built-in battery 40 for securing an operating power supply even in the event of a power failure, and a commercial power supply 51 is input to a main power supply via a power supply device (adapter) 52 having an AC / DC conversion unit and the like. The power is input to the unit 31 as a main power source, and the battery power is input from the built-in battery 40. In the normal state, the main power source is used as the operating power source, and when the main power source is interrupted due to a power failure or the like, the built-in battery 40 is used as the operating power source. The security device 30 is connected to an external connection device (not shown) such as a sensor for detecting an intruder or a sensor circuit monitoring device. The external power output unit 38 supplies power to these devices. Is going.
[0005]
However, the number of externally connected devices that can be connected to the alarm device 30 is limited due to the relationship between the number of terminals and the total amount of power supplied. Therefore, when using an external connection device exceeding this limit, it is necessary to connect a power supply device provided separately to the external connection device and supply power directly from the power supply device. Further, in this case, since it is necessary to take measures against power failure for the externally connected device, the power supply device itself must also have a battery built therein. FIG. 2 shows a schematic diagram of such a power supply device and a security device. Since the security device 30 itself has the same configuration as that of the security device 30 shown in FIG. 1, the same functional parts are denoted by the same reference numerals and the description thereof is omitted.
[0006]
As shown in FIG. 2, by incorporating batteries 40 and 24 in the security device 30 and the power supply device 20, respectively, it is possible to secure the operating power of the externally connected device by the battery of the power supply device 20 even during a power failure. it can. As a similar adapter for supplying an uninterruptible power supply with a built-in battery, for example, the one disclosed in Patent Document 1 is known.
[0007]
As described above, when the power supply device 20 also has a built-in battery, it is possible to supply power to the security device 30 from the battery of the power supply device 20 in the event of a power failure, so the security device 30 and the power supply device 20 Both have a waste of having a battery. Since the battery is a component whose performance deteriorates with time and needs to be replaced periodically, it is desirable that the battery 40 of the security device 30 be omitted from the viewpoint of equipment cost.
[0008]
[Patent Document 1]
JP 2002-258993 A (paragraphs [0009] to [0017])
[0009]
[Problems to be solved by the invention]
On the other hand, the security device 30 incorporating the battery 40 includes a main power supply voltage monitoring unit 34, and constantly monitors the input power of the main power supply to detect a power failure. A battery power supply voltage monitoring unit 35 is provided to monitor the input voltage of the battery power supply and detect the remaining capacity of the battery 40. This is because when the built-in battery 40 of the security device 30 is exhausted due to a power failure, the security device becomes inoperable. Therefore, it is detected that a power failure has occurred and the remaining battery capacity has decreased to a predetermined level, This is because it is necessary to report.
[0010]
However, when the power supply from the power supply device 20 incorporating the battery 24 is input as the main power, the battery power of the power supply device 20 is still input to the main power input unit 31 even during a power failure. Therefore, the main power supply voltage monitoring unit 34 on the security device 30 side does not stop the input voltage of the main power supply input unit 31 and cannot detect a power failure.
[0011]
Further, in the uninterruptible power supply device such as the power supply device 20 described above, the remaining capacity of the battery 24 may be detected. In order to detect the remaining capacity of the battery 24 of the power supply device 20 described above, if the power supply device 20 itself has a battery power supply voltage monitoring function, the security device 30 has a function of reporting the detection signal to the monitoring center. It is necessary to take measures such as transmitting to the side. In this case, it is necessary to change the configuration of the security device 30 to newly have a function of inputting such a detection signal.
[0012]
Therefore, the manufacturer that manufactures the security device 30 differs depending on the number of externally connected devices necessary for the specifications desired by the user so that it can cope with any of the configurations shown in FIGS. It is necessary to prepare a type of security device. This leads to an increase in the manufacturing cost of the security device 30. Further, since the power supply device 20 side is also provided with a detection function and the like, there arises a problem that the cost of the power supply device 20 itself increases.
[0013]
In view of the above problems, the present invention supplies power to a power supply device such as a security device, and can effectively use the power failure detection function that the existing power supply device originally has, and An object of the present invention is to provide a power supply system including the power supply device and the power supply device.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, a power supply system according to the present invention includes a power supply device such as the security device, and a power supply device provided separately from the power supply device. The supply device supplies the power source converted from the external power source for the power source supply device and the battery power source to the power source supply device separately.
[0015]
FIG. 3 shows a principle diagram of the power supply system 10 according to the present invention. As shown in the figure, the power supply device 20 provided separately from the power supply device 30 outputs a main power that is converted by the power conversion unit 21 from the external power supply 51 to the power supply for the power supply device 30. A power output unit 22 is provided. In addition, the power supply device 20 includes a battery 24 that is charged by a power source that has been DC-converted by the power source converter 21, and a battery power source output unit 25 that outputs battery power.
[0016]
On the other hand, the power supply device 30 includes a main power input unit 31 that inputs the output power of the main power output unit 22 of the power supply device 20 and a battery power input unit 32 that also inputs the output power of the battery power output unit 25. The two power sources input by the input units 31 and 32 are input to the load 36, respectively.
[0017]
Furthermore, the power-supplied supply device 30 includes a main power supply voltage monitoring unit 34 that monitors input to the main power supply input unit 31. The main power supply voltage monitoring unit 34 may detect and monitor the absence of input to the main power supply input unit 31.
[0018]
With this configuration, the power supply device system 10 according to the present invention uses the main power supply voltage monitoring unit 34 included in the power supply device 30 while separating the power supply device 20 from the power supply device 30. Thus, it is possible to detect a power failure.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 4 is a configuration diagram of a power supply system according to the embodiment of the present invention. As illustrated, the power supply system 10 includes a power supply device 20 and a security device 30 that is a power supply device. In this embodiment, the power supply device is exemplified by a security device provided in the above-described external facility, but the present invention is not limited to this, and a device that needs battery backup during a power failure and The present invention can be widely applied to devices having a power input monitoring function such as a power failure detection device.
[0020]
The power supply apparatus 20 receives an AC power supply (commercial power supply) 51 that is an external power supply connected from the outside, and supplies power to an externally connected device (that is, the power supply apparatus 30). Each part of the power supply device 20 will be described below.
[0021]
The main power supply output unit 22 outputs the DC power converted from the external power supply 51 by the AC / DC conversion unit 21 serving as a power conversion unit as the main power supply. The main power output unit 22 is connected to a main power input unit 31 of the security device 30 described later.
[0022]
The charge / discharge switching unit 23 normally charges the battery 24 using the DC power converted by the AC / DC conversion unit 21 and supplies power to the battery power output unit 25 and the auxiliary power output unit 26. Do. When the power supply from the AC / DC converter 21 is stopped due to a power failure or the like, the connection between the battery 24 and the AC / DC converter 21 is released, and the battery power output unit 25 and the auxiliary power output unit 26 are opened. Supply power to
[0023]
The battery power output unit 25 outputs the power supplied from the charge / discharge switching unit 23 as a battery power. The battery power output unit 25 is connected to a battery power input unit 32 of the security device 30 described later.
[0024]
The auxiliary power output unit 26 outputs main power or battery power to an external connection device (not shown) other than the security device 30. Thereby, the power supply to the external connection device is continued even during a power failure. Examples of the external connection device include a sensor that detects intrusion of a human body, a sensor circuit monitoring device that relays detection signals of these sensors and transmits them to the CPU 36, and the like.
[0025]
The power supply device 20 may include an overload detection unit 27 and an overdischarge detection unit 28 for safety as illustrated.
The overload detection unit 27 monitors loads connected to the main power supply output unit 22, the battery power supply output unit 25, and the auxiliary power supply output unit 26, and stops power supply to these when an overload occurs.
The discharge amount of the overdischarge detection unit 28 and the battery 24 is monitored, and the discharge from the battery 24 is stopped when overdischarge occurs.
[0026]
The security device 30 operates by inputting power supplied from the power supply device 20. Further, when a detection signal from an external connection device (not shown) such as a personal sensor or a fire detection sensor is detected, an abnormality is reported to the monitoring center via a communication line 37 such as a telephone line. Each part of the security device will be described below.
[0027]
The main power input device 31 inputs power supplied from the main power output unit 22 of the power supply device 20.
The battery power input unit 32 inputs supply power from the battery power output unit 25 of the power supply device 20.
[0028]
The power switching unit 33 controls power supply to the CPU of battery power input from the battery power input unit 32.
The external power supply output unit 38 supplies power to an externally connected device (not shown) such as a sensor that detects intrusion of a human body.
[0029]
The main power supply voltage monitoring unit 34 monitors the input voltage of the main power supply input unit 31 and sends a main power supply voltage abnormality signal to the CPU 36 when the monitoring voltage falls below a predetermined value due to a power failure or the like.
The battery power supply voltage monitoring unit 35 monitors the input voltage of the battery power supply input unit 32, and sends a battery power supply voltage abnormality signal to the CPU 36 when the monitored voltage falls below a predetermined value.
[0030]
The CPU 36 serving as a load of the security device 30 operates by inputting the main power input from the main power input unit 31 and the battery power input from the battery power input unit 32, and operates as a main power voltage monitoring unit 34 and a battery. When an abnormal signal is received from the power supply voltage monitoring unit 35, a notification is sent to the monitoring center via a communication line 37 such as a telephone line. Alternatively, when an external connection device (not shown) as a sensor or a detection signal from the above-described sensor circuit monitoring device is received and there is an abnormality in the external facility, the communication line 37 is used. Report to the monitoring center.
[0031]
The security device 30 according to the present embodiment may be realized as follows using the configuration of the conventional security device 30 shown in FIG.
First, the built-in battery 40 of the conventional security device 30 is removed.
Then, the battery power output unit 25 of the power supply device 20 is connected to the connection port on the battery power input unit 32 side which has been used for connection between the battery 40 and the battery power input unit 32 in the related art.
[0032]
Thus, the security device 30 of the power supply system 10 according to the present invention can be realized without changing the existing configuration of the conventional security device 30 shown in FIG.
[0033]
Hereinafter, the operation of the power supply system 10 in the present embodiment will be described.
〔Normal time〕
When an external power supply 51 (commercial power supply) is supplied to the power supply device 20, a DC power supply is generated by the AC / DC conversion unit 21, and the security device is connected via the main power supply output unit 22 and the auxiliary power supply output unit 26. 30 and the externally connected device are supplied with main power. At the same time, the charge / discharge switching unit 23 charges the battery 24 with this DC power supply.
[0034]
The security device 30 supplies the main power from the main power input unit 31 to the CPU 36 and the external power output unit 38. Here, the security device 30 shown in FIG. 1 has a built-in battery by temporarily stopping the input of the main power supply at a predetermined timing such as when the power is turned on and monitoring the input voltage by the battery power input unit 32. It has a function to detect 40 unconnected. In the power supply system 10 using such a security device 30, it is necessary to constantly supply power to the battery power input unit 32. In this case, the power supply device 20 may charge the battery 24 at the charge / discharge switching unit 23 and supply power to the battery power input unit 32 via the battery power output unit 25. At this time, the security device 30 receives power supply from the main power input unit 31 and the battery power input unit 32, but the power supply switching unit 33 stops the power supply from the battery power input unit 32, and the main power input unit 31. Can be supplied to the CPU 36.
[0035]
[Operation when a power failure occurs (main power is stopped)]
Next, when the power supply from the external power source 51 is stopped due to a power failure or the like, the power supply by the main power output unit 22 of the power supply device 20 is stopped, and subsequently to the main power input unit 31 of the security device 30. The power supply of stops. This is detected by the main power supply voltage monitoring unit 34 and a signal indicating a power failure is sent to the CPU 36. Similarly, power supply from the external power source 51 to the charge / discharge switching unit 23 is also stopped.
[0036]
When the power supply from the external power supply 51 is stopped, the charge / discharge switching unit 23 terminates the charging to the battery 24 and discharges the battery power from the battery 24 to supply power to the battery power output unit 25 and the auxiliary power output unit 26. Supply.
In the security device 30, when the input of the main power supply is stopped, the power source switching unit 33 supplies the battery power input from the battery power input unit 32 to the CPU 36 and the external power output unit 38.
[0037]
[Operation when using battery (power failure)]
The power supply is performed using the battery 24 at the time of a power failure, and the operation when the battery capacity is reduced due to use will be described.
The battery power supply voltage monitoring unit 35 of the security device 30 constantly monitors the input voltage of the battery power supply input unit 32. At normal times, since the battery power input unit 32 is applied with a certain level of voltage from the commercial power supply, the battery power supply voltage monitoring unit 35 determines that it is normal.
[0038]
When a power failure occurs, the power supply is switched to the battery 24, so that the battery 24 is consumed due to the continuation of the power failure. When the input voltage of the battery power input unit 32 falls below a predetermined value, the battery power supply voltage monitoring unit 35 considers that the remaining battery capacity has decreased, and sends a battery power abnormality signal to the CPU 36. Upon receiving this signal, the CPU 36 will soon be unable to obtain its own operating power if the power failure is not restored, so that it is displayed via the display means (not shown) provided in the security device 30, Report to an external monitoring center via the telephone line 37.
[0039]
As described above, by configuring the power supply device system 10, the embodiment of the present invention produces the following effects.
[0040]
First, the power supply device 20 is separated from the security device 30, and the uninterruptible power supply can be directly supplied from the power supply device 20 side to the external connection device (not shown). Thereby, it becomes possible to easily cope with an increase in the number of externally connected devices that need to be supplied with an uninterruptible power supply.
[0041]
Second, it is possible to detect a power failure using the main power supply voltage monitoring unit 34 provided in the security device 30. And it becomes possible to perform battery remaining capacity detection using the battery power supply voltage monitoring part 35 with which the security device 30 is provided. Thereby, it becomes possible to cope with an increase in the number of externally connected devices without substantially changing the configuration of the conventional security device shown in FIG.
[0042]
As described above, the configuration of the power supply device is greatly simplified, and it is possible to correspond to the necessary supply amount of the uninterruptible power supply without changing the existing configuration of the security device that is the power supply device. 30 increase in manufacturing cost is prevented.
[0043]
In the power supply system according to the present embodiment, the AC power supply system is illustrated by converting an AC external power supply into a DC power supply, but the present invention is not limited to this. In addition, for example, a power supply system using a power supply device that converts an AC external power supply into an AC power supply of a desired voltage and supplies it, a DC external power supply to a DC power supply, or a DC external power supply to an AC power supply It can also be applied to a power supply system.
[0044]
【The invention's effect】
Use that requires an uninterruptible power supply without changing the existing configuration of the power supply device while effectively utilizing the power failure detection function originally provided by the existing power supply device such as a security device according to the present invention It becomes possible to cope with an increase in electric power.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a conventional security device.
FIG. 2 is a configuration diagram of a conventional power supply device that supplies power to a security device.
FIG. 3 is a principle diagram of a power supply system according to the present invention.
FIG. 4 is a configuration diagram of a power supply system according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Power supply system 20 ... Power supply apparatus 21 ... Power supply conversion part 22 ... Main power supply output part 24 ... Battery 25 ... Battery power supply output part 30 ... Security apparatus (power supply apparatus)
31 ... Main power input unit 32 ... Battery power input unit 34 ... Main power voltage monitoring unit 36 ... CPU (load)
51 ... External power supply

Claims (2)

A power supply system comprising: a power supply device; and a power supply device that is provided separately from the power supply device and operates by power supplied from the power supply device,
The power supply apparatus is
A main power input section;
And battery-power supply input section,
A main power supply monitoring unit that monitors the input to the main power input unit and detects a power failure and outputs a power failure occurrence;
A power switching unit that switches operating power to input from the battery power input unit when input to the main power input unit is stopped,
The power supply device
A power conversion unit for converting an external power source into a power source for the power supply device;
A main power output unit that is connected to a main power input unit of the power supply device and outputs the power converted by the power conversion unit;
A battery charged by a DC power source converted from the external power source;
A battery power output unit connected to a battery power input unit of the power supply device and outputting a battery power from the battery ;
When there is a power supply from the external power supply, the battery is charged with the DC power converted by the power conversion unit, and when the power supply from the external power supply is stopped, the battery power is discharged from the battery. Charging / discharging switching unit for supplying to the battery power output unit,
A power supply system comprising: The power supply apparatus is
Furthermore, it has a battery power monitoring unit that detects that the input voltage to the battery power input unit has become a predetermined value or less,
The power supply device
Charging the battery with the DC power source in the charge / discharge switching unit and supplying power to the battery power output unit;
The power supply system according to claim 1.

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