KR101305273B1 - Illumination control system for railway vehicles - Google Patents

Abstract

PURPOSE: A group lighting controller for railway vehicle is provided to confirm the operating status of first and second groups of LED bulbs installed to the railway vehicle in the center, thereby reducing maintenance costs. CONSTITUTION: A first group of light emitting diode (LED) lamps (25) is operated with a direct current (DC) power source (21). A second group of LED lamps (26,27) is operated with alternating current (AC) power sources (22,23). A lighting control module (24) outputs respectively a fixed voltage to the first and second groups of the LED lamps. The LED lamp comprises a pulse width modulation (PWM) control circuit. The PWM control circuit controls the illumination of the LED lamp. [Reference numerals] (24) Lighting control module; (31) Illumination sensor; (33) User device

Description

Group Control System for Railway Vehicles {Illumination Control System For Railway Vehicles}

The present invention relates generally to a group light control apparatus for a railway vehicle. More specifically, by providing a single device type lighting control module that controls the illuminance of the constant current control type LED lamps installed in a passenger car of a railroad vehicle by group, the existing lighting control equipment can be used as it is, but the unnecessary power is wasted. It relates to a new railway vehicle light control device that can reduce the cost.

At the moment, energy saving is very urgent in the country, and industrial electric bills are continuously increasing. In order to reduce electric charges, organizations that operate railroads or electric cars are also making great efforts to control the spiking of the platform and to save power.

In addition, carbon credit trading will be implemented from 2015.In addition, we are continuously reporting and checking whether carbon reduction targets are allocated to and comply with nationally energy-intensive institutions or companies. This is the current situation.

In order to reduce energy in railway or electric vehicle operating institutions, the amount of electricity consumed must be reduced, and efforts to reduce electric power consumed by electric vehicles are continuously required. Therefore, when designing a new electric vehicle, a power unit capable of saving energy by introducing various advanced technologies, an air conditioner, and an LED light emitting diode (LED) lamp are installed to reduce energy consumption compared to the past electric vehicles. However, in the existing electric vehicles it is very limited to apply this new design.

For example, the existing incandescent bulbs are replaced with LED bulbs or redesigned to increase the efficiency of the power supply.

In particular, the lighting design of the lamp (light) is usually designed with excessive illumination at the beginning of the design in consideration of the maintenance factor (MF). As the graph shows the relationship between the actual light and the design light in FIG. 1, the actual lamp has an excessive illuminance value LD at the initial stage of the design rather than the required illuminance value L0 of the lamp installed at a specific position. As time goes by, the actual illuminance gradually decreases (CD) and, as a result, becomes lower than the required illuminance value, it becomes the maintenance point T for replacing the lamp or the ballast. Therefore, a waste of light (W) is generated during a period having an over illuminance value higher than the required illuminance value, which is the same as waste of power, and thus a technique for reducing surplus power wasted by controlling the illuminance is required.

In general, a 28-watt constant current type of LED lamp is applied to a railroad car such as an electric vehicle. The reason is that the voltage fluctuation of the electric vehicle is very irregular and it is necessary to prevent flicker that may occur due to noise generated from various electronic devices around.

In the lighting control device 10 of the existing electric vehicle, as shown in FIG. 2, a group of two LED lamps 15 using the AC voltages 11 and 13 as a power source and a DC voltage 12 are supplied. Groups of LED lamps 17 to be used as are installed together, and these two or three groups are normally operated, but in an emergency, only the LED lamp group using DC voltage as a power source is configured to operate. This is because it is necessary to maintain the minimum constant illuminance as a basic safety measure for passenger safety in an emergency, so that only a small number of lamps are lit by the concept of an emergency light using only a DC voltage derived from a battery of an electric vehicle.

Typically, the LED lamps 15 and 17 convert the voltage from the AC or DC power source into a constant DC voltage using the AC / DC converter or the DC / DC converters 151 and 171, and then use the LED as the operating voltage. The light bulbs 152 and 172 are turned on. Recently, LED lamps, which have circuits configured to directly receive AC voltage, are commonly available in general products such as home appliances. However, LED lamps that directly use AC voltage can be used due to the characteristics and design regulations of voltage variations of electric vehicles. none.

On the other hand, a conventional LED lamp converter has a simple structure that converts a constant input AC voltage into a constant DC voltage, and thus it is relatively easy to design a dimming control. It is difficult to apply dimming control by applying it as it is. This is because the voltage of the electric vehicle does not have a constant value but a large variation. For example, the voltage of the electric vehicle may vary in the range of 90V to 265V in the case of AC voltage, and may vary in the range of 66V to 140V in the case of DC voltage. Therefore, the LED lamp converter installed in the electric vehicle is designed to maintain a constant illuminance of the LED lamp in spite of the voltage fluctuation range. For this reason, it is difficult to attach a dimming device to control the brightness of LED lamps in the way currently designed on electric vehicles, and some of the methods to control by attaching a communication device to the converter are currently being studied. It is not easy to apply.

Therefore, in a rail vehicle, there is still a need for a lighting control device technology that can save energy through the dimming control of a plurality of LED lamps and can be easily applied without significantly changing the existing structure.

The present invention has been made to solve the problems of the prior art described above and to provide a variety of additional advantages, in particular, by providing a lighting control module of a single device type to control the illuminance of the lamps installed in the carriage of the railway vehicle for each group of existing lighting It is an object of the present invention to provide a group lighting control device for a railway vehicle that can use the device and the wiring equipment as it is, while reducing unnecessary waste.

This object is achieved by a group light control apparatus for a railway vehicle provided according to the present invention.

According to an aspect of the present invention, there is provided a group lighting control apparatus for a railway vehicle, wherein the lighting of the first group of LED lamps operated by the DC voltage source and the second group of LED lamps operated by the AC voltage source in the railway vehicle. A lighting control device for a railway vehicle for controlling, comprising: a lighting control module configured to output a predetermined voltage to the LED lamps of the first and second groups after receiving and processing voltages from the DC and AC voltage sources, respectively, The LED lamp has a PWM control circuit for adjusting the illuminance by controlling the current after receiving a predetermined voltage output from the illumination control module, and the illumination control module, the DC voltage input from the DC voltage supply source AC to be converted to supply a predetermined DC voltage to the LED lamps of the first group, and is also input from the AC voltage source Converting a pressure to be configured to supply to the LED lamp of the second group of a predetermined DC voltage.

In one embodiment, the lighting control module is installed for each passenger car of the railway vehicle, the LED lamps of the first and second groups may each include a passenger lamp light of 5 to 20 LED bulbs.

In another embodiment, the lighting control modules installed in each of the passenger cars may be communicatively connected to a TCMS (Train Control Monitoring System) installed in the cab of the railway vehicle to transmit data and receive control signals therefrom.

In another embodiment, the lighting control modules installed for each passenger car can be configured to be communicatively connected to a user terminal installed in the cab of the railroad vehicle to transmit data to the user terminal and to receive and operate control signals therefrom. .

In another embodiment, the lighting control module receives the illuminance measurement value from the illuminance sensor installed in the railway vehicle, and performs dimming control of the LED lamps of the first and second groups based on the received measurement value. Can be configured.

In another embodiment, the power output from the first and second LED bulb group is detected in real time and transmitted to the TCMS or the user terminal, thereby real-time and using the power of each of the first and second LED bulb groups. If the LED bulb is abnormal while detecting the used power, the power consumption of the group decreases momentarily and then increases again, causing an abnormality in the LED bulb of the group. It can be detected that, and can be configured to immediately check the detection information related to this in the TCMS or the user terminal.

In another embodiment, the predetermined DC voltage output from the lighting control module to the LED lamps of the first and second groups has one of a plurality of voltage values different from each other in a predetermined range, and the LED lamp The PWM control circuit may be configured to adjust the illuminance of the LED lamp by changing the current based on the voltage value of the predetermined voltage output from the lighting control module.

The group lighting control device for a railway vehicle of the present invention having the above-described configuration provides a single device type lighting control module for controlling the illuminance of lamps installed in a passenger car of a railway vehicle for each group, while using existing lighting control equipment as it is. Since it is possible to reduce the wasted power, and also to check the operating state of the LED bulb of the first and second groups installed in the vehicle in the center, it provides a remarkable effect such as reducing the cost of maintenance.

1 is a schematic graph showing the relationship between actual illuminance and required illuminance of a general lighting device.
Figure 2 is a schematic diagram showing the voltage supply configuration of the LED lamp installed in the carriage of a conventional railway vehicle.
3 is a schematic diagram showing a voltage supply configuration in a group vehicle light control apparatus for a railway vehicle according to an embodiment of the present invention.
Figure 4 is a schematic diagram showing the overall configuration of a group lighting control device for a railway vehicle according to an embodiment of the present invention.
Figure 5 is a schematic block diagram showing a detailed configuration of the lighting control module of the group vehicle light control apparatus for a railway vehicle according to an embodiment of the present invention.
Figure 6 is a schematic block diagram for explaining the detailed configuration of the PWM control circuit built in the LED lamp of the group vehicle light control apparatus for a railway vehicle according to an embodiment of the present invention.
7 is a circuit diagram showing an example of the configuration of the DC channel portion of the group lighting control device for a railway vehicle according to an embodiment of the present invention.
8 is a circuit diagram showing an example of the configuration of the AC channel portion of the group lighting control device for a railway vehicle according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings illustrating the present invention with a specific example as follows.

In the group light control apparatus 20 for a railroad vehicle provided according to an aspect of the present invention, as illustrated in FIG. 3, a plurality of passenger cars B are connected to a power vehicle including a cab A in a row. In a railway vehicle, it is an apparatus for controlling the illuminance of a plurality of LED lamps installed in the carriage (B).

The lighting control device 20 includes an LED lamp group connected to a power supply for supplying a direct current (DC) voltage and an LED lamp group supplied with an operating voltage by a power supply for supplying an alternating current (AC) voltage separately. It can be applied to the existing lighting installation structure of the passenger car of the existing railway vehicle.

In other words, the present lighting control device 20 is connected to the first group of LED lamps 25 and the AC voltage sources 22 and 23 operated by the DC voltage source 21 as shown in FIGS. 3 and 4. And control the illumination of the second group of LED lamps 26, 27 operated by the same. The LED lamps 26 and 27 of the second group may be further divided into two sub-groups, which are divided into two channels and each receive power.

As shown in the illustrated example, the lighting control device 20 of the present invention may include a voltage source 21, 22, 23, an lighting control module 24, and an LED lamp 25, 26, 27.

The voltage sources 21, 22, 23 may comprise two or more independent different voltages, namely a DC voltage source 21 and two AC voltage sources 22, 23. This configuration corresponds to a structure that is provided for one conventional carriage.

The lighting control module 24 has three channels in the example shown. In the first channel 1CH, the lighting control module 24 receives a DC voltage from a DC voltage supply 21 for supplying a DC voltage that varies in the range of DC 66 to 140V, for example, between DC 60 to 70V. It can be configured to supply a variable output voltage to the LED lamp 25 of the first group. In this case, the output voltage may have a voltage value of, for example, 60V, 62V, 64V, 66V, 68V, or 70V.

When the output voltage is input to the first group of LED lamps 25, for example, a dimming control signal of a pulse width modulation (PWM) dimming method may be generated to adjust illumination of the LED lamp. LED lamp 25 is composed of a PWM control circuit 251 and the LED bulb 252. The PWM control circuit 251 may control the power supplied to the LED bulb 252 by generating a PWM signal that controls the value of the current based on the input voltage value, thereby adjusting the illuminance of the LED bulbs to an appropriate level. Can be controlled.

On the other hand, in the second channel and the third channel, the lighting control module 24 receives the AC voltage from the AC voltage source 22, 23 for supplying the AC voltage which varies in the range of AC 90 ~ 265V, for example, DC 60 It can be configured to supply an output voltage that varies between ˜70V to the LED lamps 26 and 27 of the second group. In this case, the voltage output from the lighting control module 24 may be, for example, any one of voltage values of 60V, 62V, 64V, 66V, 68V, or 70V.

When the output voltage is input to the LED lamps 26 and 27 of the second group, the illuminance of the LED lamps may be adjusted in a PWM dimming manner similar to the LED lamps 25 of the first group. That is, the LED lamps 26 and 27 of the second group may be similarly configured with the PWM control circuits 261 and 271 and the LED bulbs 262 and 272, and the PWM control circuits 261 and 271 are similarly input voltages. By generating a PWM signal that controls the value of the current based on the value, it is possible to control the power supplied to the LED bulbs 262 and 272, thereby controlling the illuminance of the LED bulbs to an appropriate level.

As illustrated in FIG. 4, the lighting control module 24 may be installed one for each of the plurality of passenger cars B of the railway vehicle. Each carriage B may be provided with, for example, 24 to 30 LED bulbs as lamps, and these LED bulbs may be divided into LED lamps 25, 26 and 27 of the first and second groups, respectively. Each group of LED bulbs can include 5-20 LED bulbs.

In this configuration, the electrical wiring structure of the first group of LED lamps 25 is electrically connected to the DC voltage source 21, and the second group of LED lamps 26 and 27 is connected to the AC voltage source ( 22 and 23, it can be seen that it is electrically connected.

According to the present invention, the operation of the lighting control module 24 may be performed automatically or manually. To this end, the lighting control module 24 includes an illuminance sensor 31, a TCMS (Train Control Monitoring System) 32, or The user terminal 33 may be connected in a wired or wireless communication manner.

In general, the TCMS 32 is a well-known system installed in the cab A of a railroad vehicle. The TCMS 32 collects and stores various kinds of information related to the operation of the railroad in real time, and displays it to the control unit on the ground or the driver in the cab and provides an automatic control signal. You can send to each part. According to the present invention, various data generated according to the operation of the lighting control modules 24 installed in each vehicle B may be transmitted and stored in real time to the TCMS 32, and appropriate control signals may be stored from the TCMS 32, respectively. It can be transmitted to the lighting control module 24. Communication between the TCMS 32 and the lighting control module 24 may be connected by, for example, a wired cable of the RS485 method or a network method, or may be connected by a wireless communication method of the Wi-Fi method.

In another embodiment of the present invention, the lighting control modules 24 installed for each passenger car B may be communicatively connected to the user terminal 33 installed in the cab A of the railroad car in a wired or wireless manner. In this case, the user terminal 33 includes a display for displaying predetermined information to the driver and input means for allowing the driver to manually input a control command, and the software configured to perform such an operation may be installed and driven. It may be a portable computer terminal. In this case, the driver can know the lighting state and illuminance level of the LED bulbs in the plurality of passenger cars B using the user terminal 33 in the cab A, and can manually control them if necessary.

In another embodiment of the present invention, the illumination control module 24 receives the illuminance measurement value from at least one illuminance sensor 31, which may be installed, for example, on the front of a railroad car or inside a passenger car, The dimming control of the LED lamps 25, 26, 27 of the first and second groups may be performed based on the measured value. Such a configuration can provide the advantage that the lighting conditions in the carriage can be optimally adjusted according to the brightness of the surrounding environment of the railway vehicle.

FIG. 5 shows a more detailed block diagram of the internal structure of the illumination control module 40, which is represented in FIG. 3 and FIG. 4 as one block, ie as an illumination control module 24 in the form of a single device. have.

In the example shown in FIG. 5, the lighting control module 40 has three channels for processing voltage and additional circuit means for controlling and communicating functions.

First, the lighting control module 40 is provided with a first channel that is composed of a circuit for controlling the illuminance of the LED bulb by receiving the DC power of the railway vehicle. Referring to the first channel, first, the input terminal 411 receives a DC voltage having a variation range of 66 to 140 V from the DC voltage source 21. The received DC voltage passes through the DC / DC filtering circuit 412 to remove noise, and then passes through the DC / DC converter circuit 413 to DC 70V where the LED bulb can operate. This may be output to the output terminal 417 as any one of a plurality of different voltage values varying in the range of 60 ~ 70V while passing through the voltage control circuit 416.

Here, the presence or absence of a signal output from the DC / DC converter circuit 413 may be detected by the sensor circuit 414, and if an abnormality occurs, another DC / DC converter circuit 415, which is a redundant circuit, may be operated. can do. Since the DC power of the railway vehicle input to the first channel is usually connected with the emergency power of the railway vehicle, it should always be operated. Therefore, it is preferable that the DC / DC converters 413 and 415 have the same circuits installed in duplicate so that the operation of the first channel is guaranteed.

Furthermore, the lighting control module 40 is provided with a second channel and a third channel, which are composed of a circuit for controlling the illuminance of the LED bulb by receiving AC power of the railway vehicle. It first receives an AC voltage having a variation range of 90 to 265 V from two AC voltage sources 22 and 23 at the two input terminals 421 and 431, respectively. The received AC voltage passes through rectifier circuits 422 and 432 to remove noise and is converted to DC 127-374V, which is then passed through DC / DC converter circuits 423 and 433 to an output signal of DC 70V. do. The output signal passes through the voltage control circuits 426 and 436, which may be output to the output terminals 427 and 437 as one of a plurality of different voltage values varying in the range of 60 to 70V.

Here, the presence or absence of a signal output from the DC / DC converter circuits 423 and 433 may be detected by the sensor circuits 424 and 434, and an abnormality may occur in any one of the DC / DC converter circuits 423 and 433. If so, the switching over circuit 425 may be operated. Furthermore, if the abnormality of the signal output from the rectifier circuits 422 and 432 can be detected by the other sensor circuits 428 and 438, and if an error occurs in any of the rectifier circuits 422 and 432, the switching is similarly performed. The over circuit 425 can be operated. The switching over circuit 425 serves to generate an output voltage only by the DC / DC converter circuit 423 or 433 of a channel in which no abnormality occurs when an abnormality occurs in either the second channel or the third channel. do.

Voltage values output from the voltage control circuits 416, 426, and 436 may be determined and controlled by the logic and watchdog circuit 440. Thus, when a command to adjust the illuminance is output from the logic and watchdog circuit 440, the voltage is regulated in the voltage control circuits 416, 426, 436 according to this command, and as a result, a PWM control circuit embedded in the LED lamp. The final illuminance control signal is generated at 251, 261, and 271 so that the output level of the LED bulb can be determined.

The logic and watchdog circuit 440 may receive failure information in the event of an abnormality from each sensor circuit 414, 424, 434, 428, 438, and from the illuminance sensor 31, which may be installed outside the railroad vehicle. Also, the measurement value may be received, the voltage of the output signal output from the output terminals 417, 427, and 437 may be sensed, and the received data may be transmitted to the TCMS 32 and the controller 450 of the cab.

The control unit 450 of the lighting control module 40 is responsible for controlling each part of the lighting control module 40 automatically or by a received control signal, and is a wired cable or a wireless communication module of, for example, a Wi-Fi method ( 460 may be controlled manually by communicating with the user terminal 33 of the cab.

As mentioned above, the PWM control circuits 251, 261, 271 of the LED lamps 25, 26, 27 are each between, for example, DC 60 to 70V in three channels output from the lighting control module 24. It is possible to receive a variable output voltage, for example, a voltage value of 60V, 62V, 64V, 66V, 68V, or 70V, and to control the illumination by supplying it to the LED bulbs 252, 262, 272. .

6, only the PWM control circuit 251 of the first channel is shown, but since its configuration is similar to the PWM control circuits 261 and 271 of the second and third channels, it will be apparent to those skilled in the art that the operation is similar. something to do.

As illustrated, the PWM control circuit 251 may include a determiner 2511, a calculator 2512, and an adjuster 2513. The determination unit 2511 determines what the voltage value received by the PWM control circuit 251 is. For example, it is possible to determine whether it is any one of 60V, 62V, 64V, 66V, 68V, or 70V or less than 60V. Based on the determination result, the calculator 2512 may calculate an output power value compared to the maximum power consumption value (for example, 28 watts) of the LED bulb 252.

For example, when DC 70V is input, the calculation unit 2512 may be manufactured, for example, using a component such as a microcomputer, and outputs 100% of the maximum power consumption value (for example, 28 watts) of the LED bulb 252. For example, it is possible to control the adjuster 2513, which may be manufactured with a component that generates a PWM signal to generate a PWM signal to be provided to. If DC 68V is input, it can be controlled to provide 90% of the output power of the maximum power consumption value. If DC 66V is input, it can be controlled to provide an output power of 80% of the maximum power consumption value. If DC 64V is input, it can be controlled to provide 70% of the output power of the maximum power consumption value. If DC 62V is input, it can be controlled to provide 60% of the output power of the maximum power consumption value. If DC 60V is input, it can be controlled to provide an output power of 50% of the maximum power consumption value. If less than 60V DC is input, the power can be turned off.

FIG. 7 shows a first channel for converting DC power. The first channel part in the lighting circuit module 24 and the PWM control circuit 251 included in the LED lamp are illustrated in the drawing. The enclosed portion corresponds to the PWM control circuit portion.

8 shows a second channel or a third channel for converting an AC power source. The second or third channel part of the lighting circuit module 24 and the PWM control circuits 261 and 271 included in the LED lamp are shown. In the drawing, a portion surrounded by a box with a blue thick line corresponds to a portion of a PWM control circuit.

The biggest feature of the lighting control device according to the present invention having the configuration as described above is to use the voltage without a communication line to control the illuminance of the lighting lamps such as LED bulbs installed in the passenger car in a group. In addition, the operating voltage required for each LED bulb is not converted by applying a number of DC / DC converters corresponding to each LED bulb, but is converted in a single device type lighting control module and supplied to a plurality of LED bulbs. In addition, in general, the AC and DC voltages are simultaneously supplied to control the lighting of the car, and in the emergency, only the DC voltage is supplied to control the lighting of the car. Furthermore, in conjunction with the external illuminance, the illuminance inside the passenger car can be automatically controlled, and the driver can manually operate it if necessary. In addition, the lighting control device is designed to be dimming control for dimming control for energy saving, it is possible to record and store the relevant information, and also to detect the output power to check the operating status of each LED bulb in real time It is possible to provide a variety of advantages, such as increased ease of maintenance.

In the above description, the present invention has been described through specific embodiments, but various modifications may be made to those skilled in the art by referring to and combining various features described herein. Therefore, it should be pointed out that the scope of the present invention should not be limited to the described embodiments, but should be interpreted by the appended claims.

20, 40: light control device
21: DC voltage source
22, 23: AC voltage source
24: light control module
25, 26, 27: LED lamp
31: Ambient light sensor
32: TCMS
33: user terminal
A: Cab
B: coach

Claims (7)

A lighting control device for a railway vehicle for controlling the lighting of a first group of LED lamps operated by a DC voltage source and a second group of LED lamps operated by an AC voltage source in a railway vehicle,
And a lighting control module configured to output a predetermined voltage to the LED lamps of the first and second groups after receiving and processing voltages from the DC and AC voltage sources, respectively.
The LED lamp is provided with a PWM control circuit for adjusting the illuminance by controlling the current after receiving a predetermined voltage output from the lighting control module, and
The lighting control module is configured to convert a DC voltage input from the DC voltage supply source to supply a predetermined DC voltage to the LED lamps of the first group, and also convert an AC voltage input from the AC voltage supply source to convert a predetermined DC voltage. Group light control device for a railway vehicle, characterized in that configured to supply a voltage to the LED lamp of the second group. The method of claim 1, wherein the lighting control module is installed for each passenger car (B) of the railroad vehicle, the first and second group LED lamps each comprises a carriage lamp of 5 to 20 LED bulbs, respectively. Group lighting control device for railway vehicles. The lighting control modules installed in each of the passenger cars B are communicatively connected to a TCMS (Train Control Monitoring System) installed in the cab A of the railroad vehicle to transmit data and receive a control signal therefrom. Group lighting control device for a railway vehicle, characterized in that the. The lighting control modules installed in each of the passenger cars B are communicatively connected to a user terminal installed in the cab A of the railroad vehicle so as to transmit data to the user terminal and receive a control signal therefrom. Group lighting control device for a railway vehicle, characterized in that configured. The method of claim 1, wherein the lighting control module receives the illumination measurement value from the illumination sensor installed in the railway vehicle, and controls the magnitude of the voltage output to the LED lamps of the first and second groups based on the received measurement value Group light control device for a railway vehicle, characterized in that configured to. 4. The method of claim 3, wherein the power output from the first and second LED bulb groups is detected in real time and transmitted to the TCMS or the user terminal, thereby real-time and cumulative data of the amount of power used for each of the first and second LED bulb groups. If an error occurs in the LED bulb during the detection of the used power (Watt), the power consumption of the group decreases momentarily and then increases again, indicating that an error has occurred in the LED bulb of the group. A group lighting control device for a railroad vehicle, which can be detected and configured to immediately detect detection information related thereto in the TCMS or the user terminal. The method according to claim 1, wherein the predetermined DC voltage output from the lighting control module to the LED lamp of the first and second groups has one of a plurality of voltage values different from each other in a predetermined range,
The PWM control circuit of the LED lamp is a group vehicle light control device for railway vehicles, characterized in that configured to adjust the illuminance of the LED lamp by changing the current based on the voltage value of a predetermined voltage output from the lighting control module.

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