JP2019009061A - Indicator lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indicator light lighting device having low apparent power and improving power factor. An indicator light lighting device 14 includes a current transformer 23, a surplus power consumption circuit 27, and a lighting control circuit 33. In the current transformer 23, the constant current power supply supplied from the constant current power supply device 11 is input to the primary side. The surplus power consumption circuit 27 is connected to the secondary side of the current transformer 23, and consumes surplus power for lighting the light emitting element 15 of the indicator lamp 13. The lighting control circuit 33 is connected to the secondary side of the current transformer 23 via the surplus power consumption circuit 27, and controls the lighting power supply supplied to the light emitting element 15. [Selection diagram] Fig. 1

Description

  Embodiments described herein relate generally to a marker lamp lighting device that lights a light emitting element of a marker lamp.

  In airports, a plurality of beacon lights are installed on runways, taxiways, etc., and beacon light systems are used to guide the aircraft by lighting control of these beacon lights.

  In this marker lamp system, a plurality of saturable insulation transformers are connected to the output side of a constant current power supply device that outputs a constant current power source, and a plurality of marker lamps are connected to each other via these isolation transformers.

  Conventionally, a light bulb has been mainly used as a light source of a marker lamp, but in recent years, light emitting elements such as LEDs have been used. The light emitting element is lit with a direct current, and a required light output can be obtained with a smaller current than a light bulb.

  For this reason, at airports, replacement with marker lamps using light-emitting elements is being promoted instead of marker lamps using light bulbs. In the case of replacing with a marker lamp using a light emitting element, a marker lamp lighting device for converting a constant current power source supplied from the constant current power source device into a power source necessary for lighting the light emitting element is required.

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

  However, when the current consumed by the light emitting element is small compared to the current transformed by the current transformer, the surplus current that is fed back by the switching operation of the switching element increases, that is, the reactive power increases, and the apparent power consumption Electricity is high and power factor deteriorates.

  Due to the high apparent power, it is not possible to reduce the capacity of the constant current power supply device and the wiring and insulation transformer for supplying the constant current power supply from this constant current power supply device to the marker lamp. It has become a hindrance to conversion.

JP-A-2006-149321

  The problem to be solved by the present invention is to provide a marker lamp lighting device that has low apparent power and can improve the power factor.

  The marker lamp lighting device of the embodiment includes a current transformer, a surplus power consumption circuit, and a lighting control circuit. In the current transformer, the constant current power supplied from the constant current power supply device is input to the primary side. The surplus power consumption circuit is connected to the secondary side of the current transformer and consumes surplus power for lighting the light emitting element of the marker lamp. The lighting control circuit is connected to the secondary side of the current transformer through a surplus power consuming circuit, and controls a lighting power source supplied to the light emitting element.

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

It is a circuit diagram of the marker lamp system provided with the marker lamp lighting device which shows one embodiment.

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

  FIG. 1 shows a marker lamp system 10. The marker lamp system 10 is, for example, an aerial marker lamp system. The marker lamp system 10 includes a constant current power supply (CCR) 11 that outputs an AC constant current power supply, an insulation transformer 12 as a saturable device whose primary side is connected to the output line of the constant current power supply 11, and the insulation A marker lamp 13 connected to the secondary side which is the output side of the transformer 12 is provided.

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

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

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

  Although not shown, a plurality of insulating transformers 12 are connected in series to the output side of the constant current power supply device 11, and a marker lamp 13 is connected to the output side of each insulating transformer 12. Further, in this embodiment, the marker lamp lighting device 14 and the light emitting element 15 are built in the lamp body of the marker lamp 13, but the marker lamp lighting device 14 is separately provided outside the lamp body of the marker lamp 13, and one lamp The light emitting elements 15 of the plurality of marker lamps 13 may be connected in series to the output side of the marker lamp lighting device 14.

  In addition, the indicator lamp lighting device 14 has a power line carrier communication unit 20 connected to the secondary side of the isolation transformer 12 via input units T1 and T2, and a circuit breaker 21, a current measurement circuit 22, and a current transformer. A series circuit of the transformer 23 is connected. Further, the marker lamp 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 marker lamp 13, and superimposes the signal on the AC waveform of the constant current power supply, thereby allowing the marker lamp on the constant current power supply device 11 side. A power line carrier communication method for communicating with the monitoring control device is used. The power line carrier communication unit 20 can communicate with the indicator light monitoring control device on the constant current power supply device 11 side. It only needs to be sent. The marker lamp monitoring and control device on the constant current power supply device 11 communicates with the marker lamp 13 to remotely monitor the marker lamp 13 and to remotely control the marker lamp 13. The power line carrier communication unit 20 is provided in the lighting circuit 24.

  The circuit breaker 21 is configured by, for example, a breaker, and is normally in a state of closing the secondary side of the insulation transformer 12, and in a state of opening the secondary side of the insulation transformer 12 by drive control of the lighting circuit 24 in the event of an abnormality Switch to.

  The current measurement circuit 22 measures the current value of the constant current power source 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 output from the secondary side of the isolation transformer 12 to the primary side, and transforms the current so that the current value of the constant current power source becomes a predetermined current value. To the lighting circuit 24. That is, the current transformer 23 reduces the constant current power output from the secondary side of the isolation transformer 12 to a current value necessary for lighting the light emitting element 15, and increases the voltage. For example, an input current of 6.6 A is used. Is converted 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 a 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. In the case of an analog variable resistance, the drive unit of the analog variable resistor is controlled by the control unit 29. As a result, the resistance value is variably adjusted. Also in the case of an electronic variable resistor, control is performed so that a current flows continuously as in the case of an analog variable resistor.

  The surplus power consumption circuit 27 is connected to the high-potential side and the low-potential side on the secondary side of the current transformer 23 via the diodes D1 and D2, and is 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 on the secondary side of the current 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. 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 have a resistance value corresponding to the dimming tap, and the constant-current power supply on the secondary side of the current transformer 23 is converted to a constant voltage.

  The variable resistor 28 of the surplus power consumption circuit 27 is variably controlled by the control unit 29 to have a resistance value corresponding 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 conducting member that conducts heat of the variable resistor 28 to the metal lamp body of the marker lamp 13 is used.

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

  Further, a rectifier 31 for full-wave rectification of an AC constant current power source and a smoothing circuit 32 for smoothing a power source 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 connection of VLED 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 operation power supply circuit 34 that generates an operation power supply (V5V) of 5V, and a control that generates a control power supply (V33) of 3.3V, for example, via the operation power supply circuit 34. A power circuit 35 is connected.

  In addition, the lighting control circuit 33 has a plurality of light emitting elements 15 connected to the output side, inputs power (VLED) from the output side of the smoothing circuit 32, and controls the lighting power 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 steps down the power supply voltage controlled by the surplus power consumption circuit 27, a switching element that performs constant current control of the power flowing through the light emitting element 15, and the like. Yes. The lighting control circuit 33 is controlled by the control unit 29.

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

  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 an 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 source detected by the current measurement circuit 22, the current value and voltage value of the lighting power source detected by the detection circuit 36, and based on these, The surplus power consumption circuit 27 and the lighting control circuit 33 are controlled.

  That is, the control unit 29 sends a control signal (DPWM) to the surplus power consumption circuit 27 in accordance with 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 The resistance value of the variable resistor 28 is controlled. As a result, the constant-current power supply on the secondary side of the current transformer 23 is made constant as a voltage corresponding to the resistance value of the variable resistor 28.

  Further, the control unit 29 generates a surplus power consumption circuit according to the current value (dimming tap) of the constant current power source detected by the current measurement circuit 22 and the current value and voltage value of the lighting power source 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 source controlled at a constant voltage in 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 changed to the current measuring circuit 22. The continuity of the switching element of the lighting control circuit 33 is controlled by PWM (pulse width modulation) so that the light output of the dimming tap according to the current value of the constant current power source measured in step 1 is obtained.

  In addition, the control unit 29 is connected to the power line carrier communication unit 20 (connection of S in FIG. 1), and uses the power supply path between the constant current power supply device 11 and the marker lamp 13, and the constant current power supply device 11 side. Communicating with other marker lamp monitoring and control devices.

  Next, the operation of the marker lamp system 10 will be described.

  When the constant current power supply 11 is turned on, a constant current power supply having a current value corresponding to the dimming tap is input to the primary side of the isolation transformer 12, and the current transformer 23 connected to the secondary side of the isolation transformer 12 etc. Each of the constant current power supplies is input to the. On the secondary side of the isolation transformer 12, a current starts to flow according to the load, and the voltage increases.

  In the current transformer 23 in which the constant current power source is input to the primary side, the current value of the constant current power source is transformed so as to be a current value necessary for lighting the light emitting element 15, that is, to reduce the current and increase the voltage. Is output from the secondary side.

  The constant current power output from the secondary side of the current transformer 23 becomes a constant voltage with a voltage corresponding to the resistance value of the variable resistor 28 of the surplus power consumption circuit 27.

  The AC constant current power source that has been converted to a constant voltage by the surplus power consumption circuit 27 is rectified by the rectifier 31 and smoothed by the smoothing circuit 32, and then the operation power source is generated by the operation power source circuit 34 and controlled by the control power source circuit 35. Power is generated. These power supplies are supplied to each component of the lighting circuit 24, and each component 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 is turned on.

  The control unit 29 controls the resistance value of the variable resistor 28 of the surplus power consumption circuit 27 in accordance with 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 made constant as a voltage corresponding to the resistance value of the variable resistor 28.

  Further, the control unit 29 generates 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 source controlled at a constant voltage in 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 changed to the current measuring circuit 22. The continuity of the switching element of the lighting control circuit 33 is controlled by PWM (pulse width modulation) so that the light output of the dimming tap according to the current value of the constant current power source measured in step 1 is obtained.

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

  In the case of a dimming tap at a low dimming level (5% dimming ratio of dimming tap 3, 1% dimming ratio of dimming tap 2, 0.2% dimming ratio of dimming tap 1), light emitting element 15 The amount of power consumed by the power transformer is very small, and the current flowing through the lighting control circuit 33 is small. However, the surplus power on the secondary side of the current transformer 23 is consumed by the variable resistor 28 of the surplus power consuming circuit 27. 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 (the dimming ratio of the dimming tap 5 is 100% and the dimming ratio of the 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 current transformer 23 decreases, but the number of turns of the current transformer 23 prevents the current from flowing to the variable resistor 28 of the surplus power consumption circuit 27 more than necessary. Appropriate variable control of the ratio and the resistance value of the variable resistor 28 by the control unit 29 can reduce the apparent power.

  In addition, the control unit 29 communicates with the marker lamp monitoring control device and the like on the constant current power supply device 11 side through the power line carrier communication unit 20, and transmits the status of the marker lamp 13 and the like to the marker lamp monitoring control device and the like, for example. be able to.

  Further, the control unit 29 monitors abnormalities such as an open or short circuit of the light emitting element 15 or a failure of the marker lamp lighting device 14 based on the detection by the detection circuit 36. When detecting the abnormality, the control unit 29 controls the circuit breaker drive circuit 37 and switches the circuit breaker 21 to the open state. When the secondary side of the saturable insulating 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 an abnormality such as an open or short circuit of the light emitting element 15 of the indicator lamp 13 or a failure of the indicator lamp lighting device 14 can be detected.

  Then, according to the marker lamp lighting device 14 of the present embodiment, by providing the surplus power consumption circuit 27 on the secondary side of the current transformer 23, surplus lighting for the light emitting element 15 on the secondary side of the current transformer 23 is achieved. Therefore, the apparent power can be lowered and the power factor can be improved.

  Since the apparent power can be reduced, the power capacity of the constant current power supply device 11, the insulating transformer 12, the wiring of the output line of the constant current power supply device 11 and the like can be reduced, and the size and cost can be reduced.

  In addition, since the surplus power consumption circuit 27 includes the variable resistor 28, the secondary side of the current transformer 23 can be made constant by the variable resistor 28, and the surplus power can be generated by the switching operation of the switching element for constant voltage. The influence of noise as in the case of returning can be eliminated. Therefore, it is possible to enable communication by the power line carrier communication method using the power supply path between the constant current power supply device 11 and the marker lamp 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 surplus power on the secondary side of the current transformer 23 changing according to the dimming ratio.

  The variable resistor 28 generates heat, but since the heat can be dissipated by the heat dissipating means 30, the variable resistor 28 can be protected.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Constant current power supply
13 Indicator light
14 Marking lamp lighting device
15 Light emitting element
20 Power line carrier communication section
23 Current transformer
27 Surplus power consumption circuit
28 Variable resistance
30 Heat dissipation means
33 Lighting control circuit

Claims (5)

A current transformer that a constant current power source supplied from a constant current power supply device inputs to the primary side;
A surplus power consuming circuit connected to the secondary side of the current transformer and consuming surplus power for lighting the light emitting element of the marker lamp;
A lighting control circuit that is connected to the secondary side of the current transformer via the surplus power consuming circuit and controls a lighting power source to be supplied to the light emitting element;
A marker lamp lighting device comprising: The marker lamp lighting device according to claim 1, wherein the surplus power consumption circuit includes a variable resistor connected to a secondary side of the current transformer. The marker lamp lighting device according to claim 2, wherein the surplus power consumption circuit changes a resistance value of the variable resistor according to a dimming ratio of the light emitting element. The marker lamp lighting device according to claim 2 or 3, further comprising a heat radiating unit that radiates heat generated by the variable resistor. 5. A power line carrier communication unit that enables communication with the outside by a power line carrier communication method using a power supply path connected to the constant current power supply device. 5. Sign lamp lighting device.

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