Subway vehicle LED lighting system

Abstract

The utility model discloses a metro vehicle LED lighting system, and relates to the technical field of lighting control. The system comprises an input module, a direct current-direct current conversion module and an output control module, the input module is connected with the direct current-direct current conversion module, and the direct current-direct current conversion module is further connected with the output control module; the input module is used for accessing an alternating current signal and a direct current signal, the output control module is used for driving and output control of the direct current-direct current conversion module, and the direct current-direct current conversion module is used for performing voltage conversion processing on the input signal according to a control signal of the output control module and outputting a voltage value required by the LED illuminating lamp. And the LED brightness control of the metro vehicle is realized. According to the utility model, 220V alternating current signals and 110V direct current signals can be compatible, and the lighting control convenience and the lighting effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting control, and in particular to an LED lighting system for subway vehicles. Background Art

[0002] At present, LED lighting is widely used in subway vehicles, and the quality of subway vehicle lighting systems is directly related to the overall feeling and experience of passengers during subway travel.

[0003] LEDs offer significant advantages over traditional lighting. While traditional lighting consumes a lot of energy, LEDs offer exceptional energy-saving properties, significantly reducing the electricity consumption of vehicle lighting and contributing to energy conservation and emission reduction for the subway. In terms of service life, LEDs can operate stably for extended periods, reducing maintenance workload and operational impacts. In terms of lighting effectiveness, traditional lighting can suffer from issues such as uneven brightness and poor color rendering. LEDs, on the other hand, provide uniform, bright, and accurately colored light, improving operational service quality and providing passengers with a more comfortable visual experience while inside the vehicle. This also helps staff clearly observe the situation inside the vehicle. The operating environment of subway vehicles is complex, with factors such as vibration and temperature fluctuations placing high demands on the stability of lamps. LEDs offer excellent shock resistance and a wide temperature adaptability range, enabling them to maintain stable operation under a variety of harsh conditions.

[0004] However, current subway vehicle lighting systems still face several challenges. Under complex conditions such as vibration during train operation, the stability of current and voltage can sometimes be affected, causing flickering lighting, impacting the passenger experience and posing operational safety risks. Furthermore, the lack of compatibility between LED lighting driver technologies from different manufacturers presents challenges in the overall maintenance and upgrade of the subway system. Even with customized solutions, achieving uniform light distribution in the corners of some unusually shaped carriages remains challenging, resulting in certain blind spots.

[0005] Therefore, how to solve the compatible input of different voltage and current of subway vehicle lighting systems, optimize the lighting brightness control method, and improve the stability of the lighting system has become an urgent problem to improve operation quality and reduce maintenance costs. Utility Model Content

[0006] In order to overcome the above problems or at least partially solve the above problems, the present invention provides a subway vehicle LED lighting system that is compatible with 220V AC signals and 110V DC signals, thereby improving lighting control convenience and lighting effects.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] The utility model provides a subway vehicle LED lighting system, comprising an input module, a DC-DC conversion module and an output control module, wherein the input module is connected to the DC-DC conversion module, and the DC-DC conversion module is also connected to the output control module;

[0009] The input module is used to receive 220V AC signals and 110V DC signals. The output control module is used to drive and control the output of the DC-DC conversion module. The DC-DC conversion module is used to convert the input signal into voltage according to the control signal of the output control module, and output the voltage value required by the LED lighting to achieve brightness control of the subway vehicle LED.

[0010] The input module includes an AC input rectifier unit and a DC input boost unit. The AC input rectifier unit is used to receive a 220V AC signal and sort the 220V AC signal to obtain a corresponding DC signal. The DC input boost unit is used to receive a 110V DC signal and boost the 110V DC signal.

[0011] The AC input rectifier unit includes an L-type filter, an AC rectifier group, a power factor correction module circuit, and a first Π-type filter. After the 220V AC signal passes through the L-type filter, the power factor correction module circuit performs phase adjustment on the 220V AC signal. The AC rectifier group rectifies the adjusted 220V AC signal into a sinusoidal half-wave DC power. The sinusoidal half-wave DC power is filtered into a quasi-sinusoidal half-wave DC power by the first Π-type filter.

[0012] The above-mentioned DC input boost unit includes a D101 diode, a BD100 rectifier bridge, a boost circuit and a first filter capacitor group. The 110V DC signal passes through the D101 diode and the BD100 rectifier bridge in sequence, is boosted to the target voltage by the boost circuit, and then is filtered by the first filter capacitor group and output.

[0013] The input signal passes through the AC input terminal or the DC input terminal and enters the input module (the BOOST boost circuit can be selected), and after boosting, it enters the DC-DC conversion module (the FLYBACK conversion circuit is selected in this embodiment). After the output processing is completed, it is output to the drive terminal. The signal processing and protection are good, and then it is output to the output terminal to connect the LED light strip to complete the output control; the signal passes through the output control module, and the control output signal comes from the control chip (NT68168BTG can be selected), and then PWM is output to the DC-DC conversion module; the brightness control part (brightness control unit) (this embodiment adopts PWM mode) communicates wirelessly with the outside, and at the same time transmits the communication signal to the control chip (chip control unit). The control chip designs the output voltage to achieve stepless voltage and dimming to increase stability.

[0014] This system, through the cooperation of multiple modules such as input module, DC-DC conversion module and output control module, has compatible input of 220V AC and 110V DC, can control the brightness level, and can achieve compatible input of 220V AC and 110V DC; solve the problem of inconvenient brightness control of LED lighting system; at the same time, it adopts stepless voltage regulation and dimming, so the LED lighting system will not have flickering problems.

[0015] Furthermore, the DC-DC conversion module includes a voltage output value control unit and a high-voltage isolation circuit. The voltage output value control unit is connected to the output control module, and the high-voltage isolation circuit is connected to the voltage output value control unit for converting the voltage value required for the output LED lighting lamp.

[0016] Furthermore, the above-mentioned voltage output value control unit includes a flyback transformer, a second Π-type filter, an output voltage control circuit, a voltage feedback circuit and a second filter capacitor group. The DC signal is transformed into a DC signal with periodic jitter through the flyback transformer and the voltage feedback circuit, and then filtered into a flat DC signal through the second Π-type filter, and then transformed into a target voltage through the output voltage control circuit, and finally filtered through the second filter capacitor group to output the final target voltage.

[0017] Furthermore, the high-voltage isolation circuit includes a transformer, which isolates the high voltage and feeds back the voltage change to the output control module.

[0018] Furthermore, the output control module includes a chip control unit and a brightness control unit connected to the chip control unit. The chip control unit is also connected to the DC-DC conversion module.

[0019] The utility model has at least the following advantages or beneficial effects:

[0020] 1. It has compatible input of 220V AC and 110V DC, can control the brightness level, and can achieve compatible input of 220V AC and 110V DC;

[0021] 2. It can effectively solve the problem of inconvenient brightness and darkness control of LED lighting systems;

[0022] 3. Use stepless voltage and dimming to solve the flickering problem of LED lighting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the architecture of a subway vehicle LED lighting system according to an embodiment of the present utility model;

[0025] Figure 2 This is a circuit diagram of an input module in a subway vehicle LED lighting system according to an embodiment of the present utility model;

[0026] Figure 3 This is a circuit diagram of a DC-DC conversion module in a subway vehicle LED lighting system according to an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of an output control module in a subway vehicle LED lighting system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0032] In the description of the embodiments of the present invention, “a plurality of” means at least 2.

[0033] Example:

[0034] like Figure 1-Figure 4 As shown, the embodiment of the present invention provides a subway vehicle LED lighting system, comprising an input module, a DC-DC conversion module, and an output control module, wherein the input module is connected to the DC-DC conversion module, and the DC-DC conversion module is also connected to the output control module;

[0035] The input module is used to receive 220V AC signals and 110V DC signals. The output control module is used to drive and control the output of the DC-DC conversion module. The DC-DC conversion module is used to convert the input signal into voltage according to the control signal of the output control module, and output the voltage value required by the LED lighting to achieve brightness control of the subway vehicle LED.

[0036] The input module includes an AC input rectifier unit and a DC input boost unit. The AC input rectifier unit is used to receive a 220V AC signal and sort the 220V AC signal to obtain a corresponding DC signal. The DC input boost unit is used to receive a 110V DC signal and boost the 110V DC signal.

[0037] The AC input rectifier unit includes an L-type filter, an AC rectifier group, a power factor correction module circuit, and a first Π-type filter. After the 220V AC signal passes through the L-type filter, the power factor correction module circuit performs phase adjustment on the 220V AC signal. The AC rectifier group rectifies the adjusted 220V AC signal into a sinusoidal half-wave DC power. The sinusoidal half-wave DC power is filtered into a quasi-sinusoidal half-wave DC power by the first Π-type filter.

[0038] The DC input boost unit includes a D101 diode, a BD100 rectifier bridge, a boost circuit, and a first filter capacitor group. The 110V DC signal passes through the D101 diode and the BD100 rectifier bridge in sequence, is boosted to a target voltage by the boost circuit, and then filtered by the first filter capacitor group before being output. In some embodiments of the present invention, such as Figure 2 As shown, the above-mentioned L-type filter includes capacitors CC108, C100, and C245, and inductors L1, L2, and L3; the above-mentioned AC rectifier group includes a diode group D104 and a rectifier bridge BD100; and the above-mentioned power factor correction module circuit includes a variable resistor REL100 and a thermal resistor PTC100.

[0039] In some embodiments of the present invention, Figure 2 As shown, the boost circuit includes capacitor C104, BO control port and inductor L103; the first filter capacitor group includes capacitors CA198 and CE100; the DC signal first passes through diode D101 and rectifier bridge BD100, and the DC signal passing through the boost circuit of capacitor C104 and inductor L103 is boosted to the target voltage through the BO control port, and then filtered and output through the filter capacitor group composed of CA198 and CE100.

[0040] This system, through the cooperation of multiple modules such as input module, DC-DC conversion module and output control module, has compatible input of 220V AC and 110V DC, can control the brightness level, and can achieve compatible input of 220V AC and 110V DC; solve the problem of inconvenient brightness control of LED lighting system; at the same time, it adopts stepless voltage regulation and dimming, so the LED lighting system will not have flickering problems.

[0041] Furthermore, the DC-DC conversion module includes a voltage output value control unit and a high-voltage isolation circuit. The voltage output value control unit is connected to the output control module, and the high-voltage isolation circuit is connected to the voltage output value control unit for converting the voltage value required for the output LED lighting lamp.

[0042] Furthermore, the above-mentioned voltage output value control unit includes a flyback transformer, a second Π-type filter, an output voltage control circuit, a voltage feedback circuit and a second filter capacitor group. The DC signal is transformed into a DC signal with periodic jitter through the flyback transformer and the voltage feedback circuit, and then filtered into a flat DC signal through the second Π-type filter, and then transformed into a target voltage through the output voltage control circuit, and finally filtered through the second filter capacitor group to output the final target voltage.

[0043] In some embodiments of the present invention, Figure 3As shown, the above-mentioned flyback transformer includes Q114, Q116, Q118, Q120 MOSFET transistors and their peripheral circuit components and NP20TNS5T transformer, and also includes D111, D117 diodes; the above-mentioned second π-type filter includes C139, C140, C134, C135, C140, C294 capacitors, L105A inductor and C133, C136, CA103 capacitors; the above-mentioned output voltage control circuit includes REL101, D109, D The 114 diode, Q108 MOSFET, R106, R163, R152, R153, R155, and R154 resistors, and PTC102 are included. The voltage feedback circuit includes R164, R165, RA172, and RA173 resistors, CA106 and CA105 capacitors, R177, R178, R172, R176, R171, R179, and R180 resistors, and M101. The second filter capacitor group includes capacitors CA102 and CA101. The DC power passing through the filter circuit is transformed into periodically jittered DC power through a flyback transformer and the voltage feedback circuit. This power is then filtered into a flat DC power through a second π-type filter. The power is then transformed into a target voltage through an output voltage control circuit. Finally, the target voltage is output after filtering through the second filter capacitor group.

[0044] Furthermore, the high-voltage isolation circuit includes a transformer, which isolates the high voltage and feeds back the voltage change to the output control module. The high-voltage isolation circuit also includes resistors R175, R174, and R173, a capacitor C157, and diodes D119, D1120, D121, and D122.

[0045] Furthermore, the output control module includes a chip control unit and a brightness control unit connected to the chip control unit. The chip control unit is also connected to the DC-DC conversion module.

[0046] In the embodiments provided in this application, it should be understood that the disclosed methods and systems can also be implemented in other ways. The method and system embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of the methods and systems, methods, and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment, or a portion of code, and the module, program segment, or a portion of code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0047] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0049] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A subway vehicle LED lighting system, characterized in that: It includes an input module, a DC-DC conversion module and an output control module, wherein the input module is connected to the DC-DC conversion module, and the DC-DC conversion module is also connected to the output control module; The input module is used to receive 220V AC signals and 110V DC signals. The output control module is used to drive and control the output of the DC-DC conversion module. The DC-DC conversion module is used to perform voltage conversion processing on the input signal according to the control signal of the output control module, and output the voltage value required by the LED lighting to achieve brightness control of the subway vehicle LED; Wherein: the input module includes an AC input rectifier unit and a DC input boost unit, the AC input rectifier unit is used to receive a 220V AC signal and sort the 220V AC signal to obtain a corresponding DC signal; the DC input boost unit is used to receive a 110V DC signal and boost the 110V DC signal; The AC input rectifier unit includes an L-type filter, an AC rectifier group, a power factor correction module circuit, and a first Π-type filter. After the 220V AC signal passes through the L-type filter, the power factor correction module circuit performs phase adjustment on the 220V AC signal. The AC rectifier group rectifies the adjusted 220V AC signal into a sinusoidal half-wave DC power. The first Π-type filter filters the sinusoidal half-wave DC power into a quasi-sinusoidal half-wave DC power. The DC input boost unit includes a D101 diode, a BD100 rectifier bridge, a boost circuit and a first filter capacitor group. The 110V DC signal passes through the D101 diode and the BD100 rectifier bridge in sequence, is boosted to a target voltage by the boost circuit, and is then filtered by the first filter capacitor group before being output.

2. The subway vehicle LED lighting system according to claim 1, characterized in that: The DC-DC conversion module includes a voltage output value control unit and a high-voltage isolation circuit. The voltage output value control unit is connected to the output control module, and the high-voltage isolation circuit is connected to the voltage output value control unit, and is used to convert the voltage value required by the output LED lighting lamp.

3. The subway vehicle LED lighting system according to claim 2, characterized in that: The voltage output value control unit includes a flyback transformer, a second Π-type filter, an output voltage control circuit, a voltage feedback circuit and a second filter capacitor group. The DC signal is transformed into a DC signal with periodic jitter through the flyback transformer and the voltage feedback circuit, and then filtered into a flat DC signal through the second Π-type filter, and then transformed into a target voltage through the output voltage control circuit, and finally filtered through the second filter capacitor group to output the final target voltage.

4. The subway vehicle LED lighting system according to claim 2, characterized in that: The high-voltage isolation circuit includes a transformer, which isolates the high voltage and feeds back the voltage change to the output control module.

5. The subway vehicle LED lighting system according to claim 1, characterized in that: The output control module includes a chip control unit and a light and dark control unit connected to the chip control unit. The chip control unit is also connected to the DC-DC conversion module.

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