JP6948006B2 - Indicator light lighting device - Google Patents

Description

An embodiment of the present invention relates to an indicator light lighting device for lighting a light emitting element of an indicator light.

At airports, a plurality of indicator lights are installed on runways, taxiways, etc., and an indicator light system that guides an aircraft by controlling the lighting of these indicator lights is used.

In this indicator light system, a plurality of saturable isolation transformers are connected to the output side of a constant current power supply device that outputs a constant current power supply, and a plurality of indicator lights are connected via these isolation transformers.

Conventionally, a light bulb has been the mainstream as a light source for an indicator lamp, but in recent years, a light emitting element such as an LED has been used. The light emitting element is lit by direct current, and the required light output can be obtained with a smaller current than that of a light bulb.

Therefore, at airports, the replacement of indicator lights using light bulbs with indicator lights using light emitting elements is being promoted. When replacing the indicator light with a light emitting element, an indicator light lighting device that converts the constant current power supply supplied from the constant current power supply device into the power source required for lighting the light emitting element is required.

In the indicator light lighting device, the constant current power supply output from the constant current power supply device is transformed into a desired current and voltage by a current change transformer, and the switching element of the load adjustment circuit provided on the secondary side of the current change transformer is switched. By operating and bypassing the surplus current for lighting the light emitting element and returning it to the constant current power supply side, the secondary side of the transmutation transformer is made constant voltage and the power required for lighting the light emitting element is supplied. ing.

However, when the current consumed by the light emitting element is smaller than the current transformed by the transmutation transformer, the surplus current fed back by the switching operation of the switching element increases, that is, the reactive power increases, which is apparent to the power consumption. The power is high and the power factor deteriorates.

Due to the high apparent power, it is not possible to reduce the capacity of the constant current power supply and the wiring and insulation transformer for supplying constant current power from this constant current power supply to the indicator light, resulting in miniaturization and low cost. It is a hindrance to the conversion.

Japanese Unexamined Patent Publication No. 2016-149321

An object to be solved by the present invention is to provide an indicator light lighting device having a low apparent power and an improved power factor.

The indicator light lighting device of the embodiment includes a current transformer, a surplus power consumption circuit , a lighting control circuit , a current measurement circuit, and a control unit . In the current transformer, the constant current power supply supplied from the constant current power supply device is input to the primary side. Excess power dissipation circuit comprises a variable resistor that will be connected to the secondary side of the current transformer transformer consumes power which becomes surplus lighting of the light emitting element of the marker lamp. The lighting control circuit is connected to the secondary side of the current transformer via a surplus power consumption circuit to control the lighting power supply supplied to the light emitting element. The current measuring circuit measures the current value input to the current transformer. The control unit controls the resistance value of the variable resistor according to the current value detected by the current measurement circuit.

According to the present invention, the apparent power is low, and it can be expected that the power factor is improved.

It is a circuit diagram of the indicator light system provided with the indicator light lighting device which shows one Embodiment.

Hereinafter, one embodiment will be described with reference to FIG.

FIG. 1 shows the indicator light system 10. The indicator light system 10 is, for example, an aviation indicator light system. The indicator light system 10 includes a constant current power supply (CCR) 11 that outputs an AC constant current power supply, an isolation transformer 12 as a saturable device in which the primary side is connected to the output line of the constant current power supply 11, and this isolation. It is equipped with an indicator light 13 connected to the secondary side, which is the output side of the transformer 12.

Then, the constant current power supply device 11 has a plurality of stages (for example, between 6.6A and 2.8A, or 5.0A to 3.0A) corresponding to a plurality of dimming taps by controlling the phase of a control element such as a thyristor. It outputs a constant current power supply with a current value of 2 to 5 steps between. For example, the dimming tap has 5 stages from 1 to 5, the dimming tap 5 has a constant current power supply of 6.6 A at a dimming ratio of 100%, and the dimming tap 4 has a constant current at a dimming ratio of 25%. The power supply is 5.2A, the dimming tap 3 has a constant current power supply of 4.1A with a dimming ratio of 5%, and the dimming tap 2 has a constant current power supply of 3.4A with a dimming ratio of 1%. The optical tap 1 has a dimming ratio of 0.2% and a constant current power supply of 2.8 A. The voltage of this constant current power supply is fixed (constant). Further, the constant current power supply device 11 includes a detection circuit that monitors changes in the output such as an output waveform (voltage waveform or current waveform) and detects an abnormality in the indicator light lighting device 14 and the light emitting element 15. This abnormality includes opening or short-circuiting of the light emitting element 15, failure of the indicator light lighting device 14, and the like.

Further, the isolation transformer 12 is a saturable device such as a rubber-coated isolation transformer, and the primary side, which is the input side, is connected in series with the output line of the constant current power supply device 11.

Further, the indicator light 13 includes an indicator light lighting device 14 connected to the secondary side of the isolation transformer 12, a plurality of light emitting elements 15 connected to the output side of the indicator light lighting device 14, and the indicator light lighting device 14 and the like. It is equipped with a lamp body that houses the light emitting element 15 and the like. For example, an LED is used for the light emitting element 15. Further, the indicator light 13 may be either an embedded type in which the lamp body is embedded in the road surface and installed, or a ground type in which the lamp body is installed on the ground.

Although not shown, a plurality of isolation transformers 12 are connected in series on the output side of the constant current power supply device 11, and indicator lights 13 are connected to the output side of each isolation transformer 12. Further, in the present embodiment, the indicator light lighting device 14 and the light emitting element 15 are built in the lamp body of the indicator light 13, but the indicator light lighting device 14 is separately placed outside the lamp body of the indicator light 13 and is one. A plurality of light emitting elements 15 of the indicator lights 13 may be connected in series on the output side of the indicator light lighting device 14.

Further, in the indicator light lighting device 14, the power line carrier communication unit 20 is connected to the secondary side of the isolation transformer 12 via the input units T1 and T2, and the circuit breaker 21 and the current measurement circuit 22 are transformed. The series circuit of the transformer 23 is connected. Further, the indicator light lighting device 14 includes a lighting circuit 24 to which the light emitting element 15 is connected.

The power line carrier communication unit 20 uses the power supply path between the constant current power supply device 11 and the indicator light 13, and superimposes a signal on the AC waveform of the constant current power supply to indicate the indicator light on the constant current power supply device 11 side. A power line carrier communication method is used to communicate with the monitoring and control device. The power line carrier communication unit 20 enables mutual communication with the indicator light monitoring and control device on the constant current power supply device 11 side, but at least the state of the indicator light 13 is checked with respect to the indicator light monitoring and control device on the constant current power supply device 11 side. I just need to be able to send it. Then, the indicator light monitoring / control device on the constant current power supply device 11 communicates with the indicator light 13 to remotely monitor the state of the indicator light 13 or remotely control the indicator light 13. The power line carrier communication unit 20 is provided in the lighting circuit 24.

The circuit breaker 21 is composed of, for example, a breaker, and is in a state where the secondary side of the isolation transformer 12 is always closed, and a state in which the secondary side of the isolation transformer 12 is opened by the drive control of the lighting circuit 24 in the event of an abnormality. Switch to.

The current measuring circuit 22 measures the current value of the constant current power supply output from the secondary side of the isolation transformer 12. The current measurement circuit 22 is provided in the lighting circuit 24.

The current transformer 23 inputs a constant current power supply output from the secondary side of the isolation transformer 12 to the primary side, transforms the current value of the constant current power supply so that the current value becomes a predetermined current value, and causes the secondary side. Outputs to the lighting circuit 24. That is, the current transformer 23 reduces the constant current power supply output from the secondary side of the insulating transformer 12 to the current value required for lighting the light emitting element 15 and raises the voltage. For example, the input current of 6.6 A. Is changed to an output current of about 1A.

Further, the lighting circuit 24 includes a surplus power consumption circuit 27 connected to the secondary side of the current transformer 23. The surplus power consumption circuit 27 includes a variable resistor 28 connected to the secondary side of the current transformer 23. The resistance value of the variable resistor 28 is adjusted by the control signal (DPWM) from the control unit 29. As the variable resistor 28, for example, an electronic variable resistor such as a MOSFET or an analog variable resistor is used. In the case of an electronic variable resistor, the resistance value is variably adjusted by controlling the gate voltage of the MOSFET by the control unit 29, and in the case of an analog variable resistor, the drive unit of the analog variable resistor is controlled by the control unit 29. As a result, the resistance value is variably adjusted. In the case of the electronic variable resistor, the current is controlled to flow continuously as in the analog variable resistor.

The surplus power consumption circuit 27 is connected to the high potential side and the low potential side of the secondary side of the current transformer 23 via diodes D1 and D2, and is also connected to the ground of the lighting circuit 24 via the resistor R1. ing. The anodes of the diodes D1 and D2 are connected to the high potential side and the low potential side of the secondary side of the transmutation transformer 23, and the cathodes of the diodes D1 and D2 are connected to the variable resistor 28 of the surplus power consumption circuit 27. Further, the anode of the Zener diode ZD1 is connected to the connection point of the cathodes of the diodes D1 and D2, and the cathode of the Zener diode ZD1 is connected to the ground of the lighting circuit 24 via the resistor R1.

The variable resistor 28 of the surplus power consumption circuit 27 is variably controlled by the control unit 29 to a resistance value according to the dimming tap, and the constant current power supply on the secondary side of the current transformer 23 is made constant voltage.

The variable resistor 28 of the surplus power consumption circuit 27 is variably controlled by the control unit 29 to a resistance value according to the dimming tap, and consumes surplus power for lighting the light emitting element 15 to generate heat. Therefore, a heat radiating means 30 for radiating the heat of the variable resistor 28 is provided. As the heat radiating means 30, for example, a heat conductive member that conducts heat of the variable resistor 28 to the metal lamp body of the indicator lamp 13 is used.

The surplus power consumption circuit 27 provided with the variable resistor 28 is a load adjustment circuit that prevents overvoltage on the secondary side of the transmutation transformer 23 and consumes surplus power for lighting the light emitting element 15.

Further, a rectifier 31 that full-wave rectifies an AC constant current power supply and a smoothing circuit 32 that smoothes the power supply voltage rectified by the rectifier 31 are connected to the output side of the surplus power consumption circuit 27.

On the output side of the smoothing circuit 32, the lighting control circuit 33 is connected to the high potential side (see VLED connection in FIG. 1), and the low potential side is connected to the ground of the lighting circuit 24. Further, on the output side of the smoothing circuit 32, for example, an operating power supply circuit 34 that generates an operating power supply (V5V) of 5V, and a control that generates a control power supply (V33) of, for example, 3.3V via the operating power supply circuit 34. The power circuit 35 is connected.

Further, in the lighting control circuit 33, a plurality of light emitting elements 15 are connected to the output side, and a power supply (VLED) is input from the output side of the smoothing circuit 32 to control the lighting power supply supplied to the plurality of light emitting elements 15. .. The lighting control circuit 33 includes, for example, a power supply voltage conversion circuit such as a step-down driver that lowers the constant voltage of the power supply voltage controlled by the surplus power consumption circuit 27, and a switching element that constantly controls the power supply flowing through the light emitting element 15. There is. Then, the lighting control circuit 33 is controlled by the control unit 29.

On the output side of the lighting control circuit 33, the voltage of the power supply connected to the high potential side and output by the lighting control circuit 33 is detected, and the load current flowing to the light emitting element 15 connected to the low potential side via the resistor R2. A detection circuit 36 for detecting the lighting current is connected. The detected value detected by the detection circuit 36 is input to the control unit 29.

Further, the lighting circuit 24 includes a circuit breaker drive circuit 37 that drives the circuit breaker 21. The circuit breaker drive circuit 37 switches the circuit breaker 21 to the open state under the control of the control unit 29.

Then, the control unit 29 inputs the current value (dimming tap) of the constant current power supply detected by the current measurement circuit 22, the current value and the voltage value of the lighting power supply detected by the detection circuit 36, and based on these, the control unit 29 inputs. It controls the surplus power consumption circuit 27 and the lighting control circuit 33.

That is, the control unit 29 sends a control signal (DPWM) to the surplus power consumption circuit 27 according to the current value (dimming tap) of the constant current power supply detected by the current measurement circuit 22, and the surplus power consumption circuit 27 Controls the resistance value of the variable resistor 28. As a result, the constant current power supply on the secondary side of the current transformer 23 is converted to a constant voltage as a voltage corresponding to the resistance value of the variable resistor 28.

Further, the control unit 29 is a surplus power consumption circuit according to the current value (dimming tap) of the constant current power supply detected by the current measurement circuit 22 and the current value and voltage value of the lighting power supply detected by the detection circuit 36. The power supply voltage conversion circuit of the lighting control circuit 33 is controlled so that the voltage of the power supply controlled by the constant voltage 27 becomes a voltage corresponding to the load voltage of the light emitting element 15, and the light output of the light emitting element 15 is the current measuring circuit 22. PWM (pulse width modulation) control is performed on the continuity of the switching element of the lighting control circuit 33 so that the light output of the dimming tap corresponds to the current value of the constant current power supply measured in 1.

Further, the control unit 29 is connected to the power line carrier communication unit 20 (connection of S in FIG. 1), uses the power supply path between the constant current power supply device 11 and the indicator light 13, and is on the constant current power supply device 11 side. Communicate with the indicator light monitoring and control device, etc.

Next, the operation of the indicator light system 10 will be described.

When the power of the constant current power supply device 11 is turned on, the constant current power supply of the current value corresponding to the dimming tap is input to the primary side of the insulation transformer 12, and the current source transformer 23 and the like connected to the secondary side of the insulation transformer 12 etc. A constant current power supply is input to each. On the secondary side of the isolation transformer 12, a current starts to flow according to the load, and the voltage rises.

In the current transformer 23 in which the constant current power supply is input to the primary side, the current value of the constant current power supply is changed to the current value required for lighting the light emitting element 15, that is, the current is reduced and the voltage is increased. It changes to and is output from the secondary side.

The constant current power supply output from the secondary side of the transmutation transformer 23 is converted to a constant voltage at a voltage corresponding to the resistance value of the variable resistor 28 of the surplus power consumption circuit 27.

After the AC constant current power supply rectified by the surplus power consumption circuit 27 is rectified by the rectifier 31 and smoothed by the smoothing circuit 32, the operating power supply circuit 34 generates the operating power supply and is controlled by the control power supply circuit 35. Power is generated. These power supplies are supplied to each configuration of the lighting circuit 24, and each configuration is activated.

Then, the control unit 29 is activated, and the lighting control circuit 33 operates. When the voltage on the output side of the lighting control circuit 33 reaches the forward voltage (VF) of the light emitting element 15, a current flows through the light emitting element 15 and the light emitting element 15 lights up.

The control unit 29 controls the resistance value of the variable resistor 28 of the surplus power consumption circuit 27 according to the current value (dimming tap) of the constant current power supply detected by the current measurement circuit 22. As a result, the constant current power supply on the secondary side of the current transformer 23 is converted to a constant voltage as a voltage corresponding to the resistance value of the variable resistor 28.

Further, the control unit 29 is a surplus power consumption circuit according to the current value (dimming tap) of the constant current power supply detected by the current measurement circuit 22 and the voltage value and current value of the lighting power supply detected by the detection circuit 36. The power supply voltage conversion circuit of the lighting control circuit 33 is controlled so that the voltage of the power supply controlled by the constant voltage 27 becomes a voltage corresponding to the load voltage of the light emitting element 15, and the light output of the light emitting element 15 is the current measuring circuit 22. PWM (pulse width modulation) control is performed on the continuity of the switching element of the lighting control circuit 33 so that the light output of the dimming tap corresponds to the current value of the constant current power supply measured in 1.

Then, in the surplus power consumption circuit 27, the variable resistor 28 consumes surplus power for lighting the light emitting element 15 to generate heat. The heat of the variable resistor 28 is thermally conducted to the metal lamp body of the indicator lamp 13 by the heat radiating means 30 and radiated.

In the case of a dimming tap at a low dimming stage (dimming ratio of dimming tap 3 5%, dimming ratio of dimming tap 2 1%, dimming ratio of dimming tap 1 0.2%), the light emitting element 15 The power consumed by is very small, and the current flowing through the lighting control circuit 33 is small, but the surplus power on the secondary side of the current transformer 23 is consumed by the variable resistor 28 of the surplus power consumption circuit 27, so the reactive power is approximately 0. The apparent power with respect to the power consumption is reduced, and the power factor is improved.

In the case of a dimming tap at a high dimming stage (dimming ratio of dimming tap 5 is 100%, dimming ratio of dimming tap 4 is 25%), the power consumed by the light emitting element 15 increases, and the lighting control circuit 33 Since the flowing current increases, the surplus power on the secondary side of the transmutation transformer 23 decreases, but the number of turns of the transmutation transformer 23 so that the current does not flow more than necessary in the variable resistor 28 of the surplus power consumption circuit 27. The apparent power can be reduced by appropriately controlling the ratio and the resistance value of the variable resistor 28 by the control unit 29.

Further, the control unit 29 communicates with the indicator light monitoring control device or the like on the constant current power supply device 11 side through the power line carrier communication unit 20, and transmits, for example, the state of the indicator light 13 to the indicator light monitoring and control device or the like. be able to.

Further, the control unit 29 monitors an abnormality such as an opening or short circuit of the light emitting element 15 or a failure of the indicator light lighting device 14 based on the detection by the detection circuit 36. When the control unit 29 detects an abnormality, it controls the circuit breaker drive circuit 37 and switches the circuit breaker 21 to the open state. When the secondary side of the saturable isolation transformer 12 is opened by the circuit breaker 21, the output waveform (voltage waveform or current waveform) of the constant current power supply device 11 changes. This change can be detected by the detection circuit of the constant current power supply device 11, and abnormalities such as opening or short circuit of the light emitting element 15 of the indicator light 13 and failure of the indicator light lighting device 14 can be detected.

Then, according to the indicator light lighting device 14 of the present embodiment, by providing the surplus power consumption circuit 27 on the secondary side of the current transformer 23, there is a surplus in lighting the light emitting element 15 on the secondary side of the current transformer 23. Since the power is consumed without returning, the apparent power can be lowered and the power factor can be improved.

By reducing the apparent power, the power capacity of the output line wiring of the constant current power supply device 11, the isolation transformer 12, and the constant current power supply device 11 can be reduced, and the size and cost can be reduced.

Moreover, since the surplus power consumption circuit 27 is provided with the variable resistor 28, the secondary side of the transmutation transformer 23 can be made constant voltage by this variable resistor 28, and the surplus power is reduced by the switching operation of the switching element for making the voltage constant. It is possible to eliminate the influence of noise as in the case of feedback. Therefore, it is possible to communicate by the power line carrier communication method using the power supply path between the constant current power supply device 11 and the indicator light 13.

Further, since the resistance value of the variable resistor 28 is changed according to the dimming ratio of the light emitting element 15, it is possible to appropriately cope with the change of the surplus power on the secondary side of the current transformer 23 according to the dimming ratio.

Further, although the variable resistor 28 generates heat, the heat can be dissipated by the heat radiating means 30, so that the variable resistor 28 can be protected.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

11 Constant current power supply
13 Indicator light
14 Indicator light lighting device
15 Luminescent element
20 Power line carrier communication unit
22 Current measurement circuit
23 Current transformer
27 Surplus power consumption circuit
28 Variable resistor
29 Control unit
30 Heat dissipation means
33 Lighting control circuit

Claims (4)

With a current transformer in which the constant current power supply supplied from the constant current power supply device is input to the primary side;
The current transformer has a variable resistor that will be connected to the secondary side of the transformer, and excess power dissipation circuit that consumes power which becomes surplus lighting of the light emitting element of the marker lamp;
With a lighting control circuit connected to the secondary side of the current transformer via the surplus power consumption circuit and controlling the lighting power supply supplied to the light emitting element;
With a current measurement circuit that measures the current value input to the current transformer;
A control unit that controls the resistance value of the variable resistor according to the current value detected by the current measurement circuit;
A marker light lighting device, characterized in that the device is provided with . The excess power consumption circuit, the label lamp lighting device according to claim 1, wherein changing the resistance value of the variable resistor in accordance with the dimming ratio of the light emitting element. The indicator light lighting device according to claim 1 or 2 , further comprising a heat radiating means for radiating heat generated by the variable resistor. The constant current power supply unit with an external communicable claims 1, characterized in that it comprises a power line communication unit to 3 any one described by power line carrier communication system using the power supply path connected between the Indicator light lighting device.

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