A direct current power supply lighting dimming module

Abstract

The present application relates to the technical field of direct current power supply lighting, and particularly relates to a direct current power supply lighting dimming module, which comprises a direct current input module, a power electronic coupling conversion module, a power coupling signal output module, a signal input module and a power signal coupling driving module, the power electronic coupling conversion module is electrically connected with the direct current input module, the power coupling signal output module and the power signal coupling driving module respectively, the signal input module is electrically connected with the power signal coupling driving module, when direct current is input into the dimming interior, the direct current is converted into a power coupling signal with a coupling signal through the power electronic coupling conversion module, and the power coupling signal is output onto a lamp through the power coupling signal output module; the dimming signal is recognized through the power signal coupling driving module, is converted into a driving signal, and the power electronic coupling conversion module emits a high voltage and a low voltage with a low frequency and an amplitude of ±5V, so that the brightness of a lamp of a certain loop of a direct current lighting power supply system is adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of direct current power supply lighting technology, in particular to a direct current power supply lighting dimming module. BACKGROUND

[0002] The direct current centralized lighting technology is a new type of dimming technology that the distributed AC / DC rectifier in the traditional LED lamp drive is centrally placed in the power supply cabinet, and the low frequency rise and fall of the high voltage direct current is used to couple the dimming information and transmit it to the decoding chip on the lamp drive for dimming. However, the current direct current centralized lighting technology faces a pain point in industrialization: there is a lack of a device that can quickly adjust the brightness of the lamps in a certain loop of the direct current lighting power supply system. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a direct current power supply lighting dimming module that can adjust the brightness of the lamps in a certain loop of the direct current lighting power supply system.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is:

[0005] A direct current power supply lighting dimming module, comprising a direct current input module, a power electronic coupling conversion module, a power coupling signal output module, a signal input module and a power signal coupling driving module, the power electronic coupling conversion module is electrically connected with the direct current input module, the power coupling signal output module and the power signal coupling driving module, the signal input module is electrically connected with the power signal coupling driving module, and the power coupling signal output module is electrically connected with the lamps of the external device.

[0006] The present application has the following advantages:

[0007] The direct current enters the inside of the dimming module through the direct current input module, the dimming signal is input into the inside of the dimming module from the signal input module, when the direct current is input into the inside of the dimming module, it is converted into a power coupling signal with a coupling signal by the power electronic coupling conversion module, and output to the lamps through the power coupling signal output module; the dimming signal is recognized by the power signal coupling driving module and converted into a driving signal, the power electronic coupling conversion module outputs a high voltage and a low voltage with a low frequency and an amplitude of ±5V, thereby realizing the coupling output of power and signal, and further realizing the brightness adjustment of the lamps in a certain loop of the direct current lighting power supply system. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1Module connection block diagram of a direct current power supply lighting dimming module according to the present application;

[0009] Figure 2 Circuit principle diagram of a power electronic coupling conversion module, a power coupling signal output module, a power signal coupling driving module and a fourth auxiliary module of a direct current power supply lighting dimming module according to the present application;

[0010] Figure 3 Circuit principle diagram of a direct current input module of a direct current power supply lighting dimming module according to the present application;

[0011] Figure 4 Circuit principle diagram of a signal input module of a direct current power supply lighting dimming module according to the present application;

[0012] Figure 5 Circuit principle diagram of a signal input module of a direct current power supply lighting dimming module according to the present application;

[0013] Figure 6 Circuit principle diagram of a first auxiliary module of a direct current power supply lighting dimming module according to the present application;

[0014] Figure 7 Circuit principle diagram of a second auxiliary module of a direct current power supply lighting dimming module according to the present application;

[0015] Figure 8 Circuit principle diagram of a third auxiliary module of a direct current power supply lighting dimming module according to the present application;

[0016] Figure 9 Structure schematic diagram of a specific embodiment of a direct current power supply lighting dimming module according to the present application;

[0017] Figure 10 BUCK topology structure of a power electronic coupling conversion module of a direct current power supply lighting dimming module according to the present application;

[0018] Figure 11 BOOST topology structure of a power electronic coupling conversion module of a direct current power supply lighting dimming module according to the present application;

[0019] Label explanation:

[0020] 1. Dimming module; 101. Direct current input module; 102. Power electronic coupling conversion module; 103. Power coupling signal output module; 104. Signal input module; 105. Power signal coupling driving module;

[0021] 2. Strong current cable;

[0022] 3. RS485 signal line;

[0023] 4. Intelligent driving module;

[0024] 5. Lamp. DETAILED DESCRIPTION

[0025] To make the technical contents, purposes and effects of the present application clear, the following will be described in detail in combination with the embodiments and the accompanying drawings.

[0026] Please refer to Figure 1 The technical scheme provided by the present application is as follows:

[0027] A direct current power supply lighting dimming module, comprising a direct current input module, a power electronic coupling conversion module, a power coupling signal output module, a signal input module and a power signal coupling driving module, the power electronic coupling conversion module is electrically connected with the direct current input module, the power coupling signal output module and the power signal coupling driving module respectively, the signal input module is electrically connected with the power signal coupling driving module, and the power coupling signal output module is electrically connected with the lamp of external device.

[0028] From the above description, the beneficial effects of the present application are as follows:

[0029] The direct current enters the inside of the dimming module through the direct current input module, and the dimming signal is input into the inside of the dimming module from the signal input module, when the direct current is input into the inside of the dimming module, the direct current is converted into the power coupling signal with the coupling signal through the power electronic coupling conversion module, and then is output to the lamp through the power coupling signal output module; the dimming signal is recognized through the power signal coupling driving module, and is converted into the driving signal, the power electronic coupling conversion module outputs the high voltage and the low voltage with the low frequency and the amplitude of ±5V, so that the power and the signal are coupled and output, and then the brightness of the lamp of the certain loop of the direct current lighting power supply system is adjusted.

[0030] Further, the BUCK topology structure of the power electronic coupling conversion module comprises a filter capacitor C101, a reactor L101, a resistor R101, a dummy load Rf1, a diode D101, a relay S1 and a field effect tube Q101, the gate of the field effect tube Q101 is electrically connected with the power coupling signal driving module, the drain of the field effect tube Q101 is electrically connected with one end of the relay S1, the source of the field effect tube Q101 is electrically connected with the other end of the relay S1, the cathode of the diode D101 and one end of the reactor L101 respectively, the other end of the reactor L101 is electrically connected with one end of the filter capacitor C101 and one end of the dummy load Rf1 respectively, the other end of the filter capacitor C101 is electrically connected with one end of the resistor R101, and the other end of the resistor R101 is electrically connected with the other end of the dummy load Rf1 and the anode of the diode D101 respectively.

[0031] Further, the boost topology of the power electronic coupling conversion module includes a filter capacitor C201, an inductor L201, a resistor R201, a dummy load Rf2, a diode D201, and a field effect transistor Q201, a gate of the field effect transistor Q201 is electrically connected with the power coupling signal driving module, a drain of the field effect transistor Q201 is electrically connected with one end of the inductor L201 and an anode of the diode D201 respectively, a source of the field effect transistor Q201 is electrically connected with one end of the resistor R201 and one end of the dummy load Rf2 respectively, a cathode of the diode D201 is electrically connected with one end of the filter capacitor C201 and the other end of the dummy load Rf2 respectively, the other end of the filter capacitor C201 is electrically connected with the other end of the resistor R201.

[0032] Please refer to Figures 1 to 10 , the embodiment one of the present application is:

[0033] Please refer to Figure 1 A direct current power supply lighting dimming module, comprising a direct current input module 101, a power electronic coupling conversion module 102, a power coupling signal output module 103, a signal input module 104 and a power signal coupling driving module 105, the power electronic coupling conversion module 102 is electrically connected with the direct current input module 101, the power coupling signal output module 103 and the power signal coupling driving module 105 respectively, the signal input module 104 is electrically connected with the power signal coupling driving module 105, and the power coupling signal output module 103 is electrically connected with the external lamp 5.

[0034] Please refer to Figure 2 The power electronic coupling conversion module 102 includes a resistor R4 (100Ω), a resistor R7 (100kΩ), a capacitor C1 (1μF), a capacitor C19 (1nF), an inductor L1 (220μH), a diode D1 (STTH8IL06FP), a fuse F3 (8A, 250V) and a field effect transistor Q3 (47N60), a gate of the field effect transistor Q3 is electrically connected with one end of the resistor R7 and the power signal coupling driving module 105 respectively, a source of the field effect transistor Q3 is electrically connected with the other end of the resistor R7 and one end of the capacitor C19 respectively, a drain of the field effect transistor Q3 is electrically connected with one end of the fuse F3 and one end of the resistor R4 respectively, the other end of the resistor R4 is electrically connected with the other end of the capacitor C19, the other end of the fuse F3 is electrically connected with one end of the inductor L1 and an anode of the diode D1 respectively, a cathode of the diode D1 is electrically connected with one end of the capacitor C1 and the power coupling signal output module 103 respectively, the other end of the capacitor C1 is electrically connected with the other end of the inductor L1 and the power coupling signal output module 103 respectively.

[0035] Capacitor C1, inductor L1, diode D1, field effect transistor Q3 constitute a buck structure, which is to adjust the light signal coupled to the power line, to output low frequency, amplitude of ± 5V high voltage and low voltage; resistor R4 and capacitor C19 constitute an RC absorption circuit, absorbing voltage spikes during the switching process of field effect transistor Q3; the role of fuse F3 is to protect the entire power supply system when diode D1 or field effect transistor Q3 fails.

[0036] Please refer to Figure 2 , the power signal coupling drive module 105 includes resistor R1 (resistance value is 1kΩ), resistor R3 (resistance value is 10Ω), resistor R6 (resistance value is 0Ω), capacitor C21 (capacitance value is 1μF), voltage regulator Z1 (voltage value is 12V) and chip U6 (model is EG3001), the second pin of the chip U6 is electrically connected with one end of the resistor R1, the other end of the resistor R1 is electrically connected with the signal input module 104, the fifth pin of the chip U6 is respectively electrically connected with the anode of the voltage regulator Z1 and the power electronic coupling conversion module 102, the cathode of the voltage regulator Z1 is electrically connected with the power electronic coupling conversion module 102, the sixth pin of the chip U6 is electrically connected with one end of the resistor R6, the other end of the resistor R6 is electrically connected with the power electronic coupling conversion module 102, the seventh pin of the chip U6 is electrically connected with one end of the resistor R3, the other end of the resistor R3 is electrically connected with the power electronic coupling conversion module 102, the eighth pin of the chip U6 is electrically connected with one end of the capacitor C21, the other end of the capacitor C21 is grounded.

[0037] Resistor R1, resistor R3, resistor R6, capacitor C21 and chip U6 constitute the driving circuit of field effect transistor Q3, which is to convert the dimming signal into a driving signal that can drive the field effect transistor to work, and the voltage regulator Z1 prevents the driving signal from damaging the field effect transistor due to excessively high voltage.

[0038] Please refer to Figure 2 , the power coupling signal output module 103 includes resistor R5 (resistance value is 150kΩ), resistor R17 (resistance value is 150kΩ), resistor R21 (resistance value is 150kΩ), resistor R29 (resistance value is 150kΩ) and pressure sensitive resistor RV1 (resistance value is 471kΩ), one end of the pressure sensitive resistor RV1 is respectively electrically connected with one end of the resistor R5, one end of the resistor R17 and the power electronic coupling conversion module 102, the other end of the pressure sensitive resistor RV1 is respectively electrically connected with one end of the resistor R21, one end of the resistor R29 and the power coupling signal output module 103, the other end of the resistor R5 is electrically connected with the other end of the resistor R21, the other end of the resistor R17 is electrically connected with the other end of the resistor R29.

[0039] The pressure sensitive resistor RV1 is used as a protection device to protect the semiconductor device in the power electronic coupling conversion module, avoiding the damage of the instantaneous voltage pulse on the power line to the device, and the resistors R5, R17, R21 and R29 are used as discharge resistors to quickly discharge the residual voltage of the capacitor C1 in the power electronic coupling conversion module when the dimming module stops working.

[0040] Please refer to Figure 3 The DC input module 101 includes a connector P1 (a straight pin connector with a specification parameter of 2.54mm2*20P), the ninth pin, the tenth pin, the eleventh pin, the twelfth pin, the thirteenth pin and the fourteenth pin of the connector P1 are electrically connected with the power electronic coupling conversion module 102, and the seventeenth pin, the eighteenth pin, the nineteenth pin, the twentieth pin, the twenty-first pin, the twenty-second pin, the twenty-third pin and the twenty-fourth pin of the connector P1 are grounded.

[0041] The connector P1 is an input and output interface of the dimming module, responsible for inputting the dimming signal and the power signal into the module for processing, and re-outputting the power signal coupled with the dimming signal to the power line after processing.

[0042] Please refer to Figure 4 The signal input module 104 includes a chip U3 (model STM8S003), and the sixteenth pin of the chip U3 is electrically connected with the power signal coupling driving module 105.

[0043] Please refer to Figure 4The signal input module 104 further comprises a resistor R14 (10kΩ), a resistor R19 (10kΩ), a resistor R20 (10kΩ), a resistor R24 (4.7kΩ), a capacitor C4 (100nF), a capacitor C6 (100nF), a capacitor C8 (100μF), a capacitor C9 (100nF), and a light emitting diode LED1 (green color), the fifth pin of the chip U3 is electrically connected with one end of the resistor R24, the other end of the resistor R24 is electrically connected with the cathode of the light emitting diode LED1, the anode of the light emitting diode LED1 is electrically connected with one end of the resistor R19, the other end of the resistor R19 is electrically connected with one end of the capacitor C6 and the fourth pin of the chip U3 respectively, the other end of the capacitor C6 is electrically connected with the seventh pin of the chip U3, and the other end of the capacitor C6 and the seventh pin of the chip U3 are grounded, the eighth pin of the chip U3 is electrically connected with one end of the capacitor C8, the other end of the capacitor C8 is electrically connected with one end of the capacitor C9, and the other end of the capacitor C8 and one end of the capacitor C9 are grounded, the other end of the capacitor C9 is electrically connected with the ninth pin of the chip U3, the nineteenth pin of the chip U3 is electrically connected with one end of the resistor R20, one end of the resistor R14, and one end of the capacitor C4 respectively, the other end of the resistor R20 is electrically connected with the other end of the capacitor C4, and the other end of the resistor R20 and the other end of the capacitor C4 are grounded.

[0044] Please refer to Figure 5 The signal input module 104 further comprises a resistor R36 (100kΩ), a resistor R37 (1kΩ), a resistor R38 (1kΩ), a resistor R41 (47kΩ), a resistor R43 (10kΩ), a resistor R44 (1kΩ), a resistor R45 (47kΩ), a resistor R46 (1kΩ), a resistor R47 (1kΩ), a resistor R48 (100kΩ), a resistor R49 (10kΩ), a resistor R102 (0Ω), a resistor R103 (0Ω), a capacitor C13 (100pF), a capacitor C11 (100nF), a capacitor C18 (100pF), a capacitor C12 (100nF), a voltage stabilizing tube TVS1 (SMF6.5CA), a voltage stabilizing tube TVS2 (SMF6.5CA), a voltage stabilizing tube TVS3 (SMF6.5CA), an optical coupler OC1 (TLP291), an optical coupler OC3 (TLP291), an optical coupler OC4 (TLP291), and a chip U4 (MAX485SE).

[0045] The first pin of the chip U4 is electrically connected with one end of the resistor R36 and the second end of the optoelectronic coupler OC1 respectively, the second pin of the chip U4 is electrically connected with one end of the resistor R49, the third end of the optoelectronic coupler OC3 and the third pin of the chip U6 respectively, the fourth pin of the chip U6 is electrically connected with one end of the resistor R46 and the fourth end of the optoelectronic coupler OC4 respectively, the other end of the resistor R49 is electrically connected with the third end of the optoelectronic coupler OC4, the fifth pin of the chip U4, one end of the capacitor C18, the anode of the voltage stabilizing tube TVS3, the anode of the voltage stabilizing tube TVS2, the direct current input module 101 and the electric connection respectively, the second end of the optoelectronic coupler OC4 is electrically connected with one end of the resistor R48 and the second pin of the chip U3 respectively, the other end of the resistor R48 is electrically connected with one end of the resistor R47, one end of the capacitor C12 and one end of the resistor R38 respectively, the first end of the optoelectronic coupler OC4 is electrically connected with the other end of the resistor R47, the first end of the optoelectronic coupler OC3 is electrically connected with one end of the resistor R44, the other end of the resistor R44 is electrically connected with the first pin of the chip U3, the second end of the optoelectronic coupler OC3 is grounded, the fourth end of the optoelectronic coupler OC3 is electrically connected with one end of the resistor R37, the other end of the resistor R46, the other end of the resistor R36, the eighth pin of the chip U4, one end of the capacitor C11 and the direct current input module 101 respectively, the seventh pin of the chip U4 is electrically connected with one end of the resistor R41, one end of the resistor R43, one end of the capacitor C13 and one end of the resistor R102 respectively, the sixth pin of the chip U4 is electrically connected with the other end of the resistor R43, one end of the resistor R45, the other end of the capacitor C18 and one end of the resistor R103 respectively, the other end of the resistor R41 is electrically connected with the other end of the capacitor C11 and the other end of the capacitor C13 respectively, the other end of the resistor R102 is electrically connected with the cathode of the voltage stabilizing tube TVS3, the cathode of the voltage stabilizing tube TVS1 and the direct current input module 101 respectively, the other end of the resistor R103 is electrically connected with the anode of the voltage stabilizing tube TVS1, the cathode of the voltage stabilizing tube TVS2 and the direct current input module 101 respectively.

[0046] The chip U4 is a chip with the model number RS485, which functions to convert external dimming signals into signals recognizable by a single-chip microcomputer, and the optoelectronic couplers OC1, OC3 and OC4 are arranged to electrically isolate external signals from the dimming module, thereby ensuring stable operation of the module.

[0047] Please refer to Figure 6, the direct current power supply lighting dimming module further comprises a first auxiliary module, the first auxiliary module comprises a fuse F2 (the current value is 0.1A, the voltage value is 24V), a capacitor C25 (the capacitance value is 2.2uF), a capacitor C26 (the capacitance value is 1uF) and a chip U7 (the model is 78L05), the first pin of the chip U7 is electrically connected with one end of the capacitor C26, the other end of the capacitor C26 is electrically connected with the second pin of the chip U7 and one end of the capacitor C25 respectively, the other end of the capacitor C25 is electrically connected with the third pin of the chip U7 and one end of the fuse F2 respectively, the other end of the fuse F2 is electrically connected with the direct current input module 101.

[0048] The chip U7, the capacitor C25, the capacitor C26 and the fuse F2 constitute a linear voltage reduction source, and the chip U4 of the signal input module is powered.

[0049] Please refer to Figure 7 , the direct current power supply lighting dimming module further comprises a second auxiliary module, the second auxiliary module comprises a capacitor C3 (the capacitance value is 100uF), a capacitor C14 (the capacitance value is 100uF), a capacitor C15 (the capacitance value is 100nF), a capacitor C16 (the capacitance value is 100uF), a capacitor C17 (the capacitance value is 100nF), a fuse F1 (the current value is 0.1A, the voltage value is 24V) and a chip U5 (the model is 78L05), the first pin of the chip U5 is electrically connected with one end of the capacitor C17 and one end of the capacitor C16 respectively, the second pin of the chip U5 is electrically connected with the other end of the capacitor C16, the other end of the capacitor C17, one end of the capacitor C14, one end of the capacitor C15 and one end of the capacitor C3 respectively, the third pin of the chip U5 is electrically connected with the other end of the capacitor C14, the other end of the capacitor C15 and one end of the fuse F1 respectively, the other end of the fuse F1 is electrically connected with the other end of the capacitor C3.

[0050] The chip U5, the capacitor C3, the capacitor C14, the capacitor C15, the capacitor C17, the fuse F1 constitute a linear voltage reduction source, and the internal devices of the dimming module are powered.

[0051] The direct current power supply lighting dimming module further comprises a third auxiliary module, the third auxiliary module comprises a resistor R39 (the resistance value is 10kΩ), a resistor R40 (the resistance value is 4.7kΩ) and a photoelectric coupler OC2 (the model is TLP291), and the specific connection relationship between the devices of the third auxiliary module please refer to Figure 8 ;

[0052] The direct current power supply lighting dimming module further comprises a fourth auxiliary module, which comprises a resistor R2 (1Ω in resistance value), a resistor R8 (100kΩ in resistance value), a resistor R9 (100MΩ in resistance value), a resistor R10 (2kΩ in resistance value), a resistor R11 (1kΩ in resistance value), a resistor R12 (2kΩ in resistance value), a resistor R13 (100kΩ in resistance value), a resistor R15 (4.7kΩ in resistance value), a resistor R16 (NC in resistance value), a resistor R18 (1kΩ in resistance value), a resistor R22 (10kΩ in resistance value), a resistor R23 (100kΩ in resistance value), a resistor R25 (1kΩ in resistance value), a resistor R26 (10kΩ in resistance value), a resistor R27 (100kΩ in resistance value), a resistor R28 (1Ω in resistance value), a resistor R32 (4.7kΩ in resistance value), a resistor R33 (100kΩ in resistance value), a capacitor C2 (100nF in capacitance value), a capacitor C5 (100nF in capacitance value), a capacitor C7 (10nF in capacitance value), a capacitor C20 (10nF in capacitance value), a capacitor C22 (1μF in capacitance value), a diode D2 (NC in capacitance value), a voltage stabilizer Z2 (5.1V in voltage value), a voltage stabilizer Z3 (5.1V in voltage value), a triode Q7 (MNBT5551 in model), an inverter U1A (LM2904 in model), an inverter U1B (LM2904 in model) and an inverter U2B (LM2903 in model), and the specific connection relationship between each component of the fourth auxiliary module is shown in the fourth auxiliary module of the direct current power supply lighting dimming module. Figure 2 ;

[0053] The resistor R8, the resistor R9, the resistor R10, the resistor R11, the resistor R12, the resistor R13, the capacitor C5, the capacitor C2, the voltage stabilizer Z2 and the inverter U1A constitute a differential amplification circuit, which is responsible for detecting the size of the current when the dimming module works; the resistor R2, the resistor R15, the resistor R16, the resistor R18, the resistor R22, the resistor R23, the resistor R25, the resistor R26, the resistor R27, the resistor R28, the resistor R32, the resistor R33, the capacitor C7, the capacitor C20, the capacitor C22, the diode D2, the voltage stabilizer Z3, the triode Q7 and the inverter U2B constitute a short circuit protection circuit, which sends a signal to turn off the field effect tube drive when the dimming module output is short-circuited, so that the circuit is not damaged.

[0054] The specific connection relationship between each component of the fourth auxiliary module is shown in the fourth auxiliary module of the direct current power supply lighting dimming module. Figure 10The BUCK topology of the power electronic coupling conversion module 102 comprises a filter capacitor C101, an inductor L101, a resistor R101, a dummy load Rf1, a diode D101, a relay S1 and a field effect transistor Q101, the gate of the field effect transistor Q101 is electrically connected with the power coupling signal driving module, the drain of the field effect transistor Q101 is electrically connected with one end of the relay S1, the source of the field effect transistor Q101 is electrically connected with the other end of the relay S1, the cathode of the diode D101 and one end of the inductor L101 respectively, the other end of the inductor L101 is electrically connected with one end of the filter capacitor C101 and one end of the dummy load Rf1 respectively, the other end of the filter capacitor C101 is electrically connected with one end of the resistor R101, and the other end of the resistor R101 is electrically connected with the other end of the dummy load Rf1 and the anode of the diode D101 respectively.

[0055] The dimming module based on the BUCK topology has the circuit characteristic of realizing direct-current voltage reduction, and therefore the coupling carrier signal waveform is a concave waveform.

[0056] The working principle is as follows: (1) when dimming is not needed, the relay S1 is closed, and the field effect transistor Q101 is short-circuited and shielded; (2) when a carrier signal needs to be sent, the relay S1 is opened, and the field effect transistor Q101 is driven by the dimming module controller, and a small-amplitude and low-frequency fluctuation voltage waveform in the rated direct-current voltage range is modulated to realize signal waveform superposition; (3) the input voltage of the corresponding carrier receiving and driving power supply integrated module can accept the voltage amplitude variation (peak-to-peak value of about 10V, frequency of about 10Hz), which can identify the signal and will not cause light source brightness flicker due to the fluctuation. Since the relay cannot be made small in size, it will cause the dimming module to have a large size, but the safety advantage of this topology is that when a fault breakdown occurs, more than 95% of the cases will cause MOSFET short circuit. This circuit ensures that even when the semiconductor switch is short-circuited, only a mild fault of being unable to dim will occur, without affecting the safety of the upper bus.

[0057] By connecting the dimming module 1 designed in the scheme in series on the direct-current bus in the power distribution cabinet, the dimming module 1 can receive the weak-current dimming command from the control center in the power distribution cabinet and convert it into a dimming signal coupled on the strong-current circuit, which is decoupled, received and responded by the intelligent driving of the lamp 5;

[0058] Please refer to Figure 9The dimming module 1 is electrically connected with the strong current cable 2 and the RS485 signal line 3 respectively, the output end of the dimming module 1 is electrically connected with the lamp 5 through the intelligent driving module 4, 200V-300V direct current is input to the dimming module 1 through the strong current cable 2, and the dimming signal based on the MODBUS protocol is also input to the dimming module 1 through the RS485 signal line 3; the dimming signal is coupled to the output cable of the dimming module 1 through the dimming module 1, the dimming signal is decoupled and interpreted through the intelligent driving module 4, and then the brightness of the lamp 5 is adjusted by changing the duty cycle of the PWM waveform of the output voltage of the intelligent driving module 4.

[0059] The dimming module 1 designed in the scheme has the advantages that all the lamps 5 on a certain lighting power supply loop are controlled to dim through the distributed dimming module 1, and the dimming is realized by attaching the signal to the direct current power network, so that the advantages of 'not increasing the communication cable and not increasing the alternating coupling / decoupling equipment' are achieved; for the distributed dimming module 1, the advantages are that all the dimming modules 1 synchronously receive the upper dimming instruction, only a part of the specified modules respond to the dimming instruction, and the intelligent drive on the loop controlled by the module is issued, so that the dimming is realized, and the advantages are: (1) the dimming instruction is avoided to be issued to all the intelligent drives, so that the error probability is reduced; (2) compared with the centralized dimming mode, the cost is low, the bus voltage in the large current state does not need to be uniformly raised and lowered to send the dimming digital signal, only the voltage on the self loop is controlled, so that the rated current demand of the equipment is greatly reduced, and the cost performance of the equipment is improved; (3) when the distributed dimming module 1 is damaged, only the power supply on a single loop is affected, and the power-off area is smaller than that of the centralized dimming mode.

[0060] Please refer to Figure 11 Embodiment two of the present application is:

[0061] The difference between the embodiment two and the embodiment one is that the BOOST topological structure of the power electronic coupling conversion module 102 includes a filter capacitor C201, a reactor L201, a resistor R201, a dummy load Rf2, a diode D201 and a field effect tube Q201, the gate of the field effect tube Q201 is electrically connected with the power coupling signal driving module, the drain of the field effect tube Q201 is electrically connected with one end of the reactor L201 and the anode of the diode D201 respectively, the source of the field effect tube Q201 is electrically connected with one end of the resistor R201 and one end of the dummy load Rf2 respectively, the cathode of the diode D201 is electrically connected with one end of the filter capacitor C201 and the other end of the dummy load Rf2 respectively, and the other end of the filter capacitor C201 is electrically connected with the other end of the resistor R201.

[0062] The circuit characteristic of a dimming module based on the BOOST topology is to boost the DC voltage, resulting in a convex waveform for the coupled carrier signal. This topology eliminates the need for relays, effectively reducing module size. When dimming is not required, the FET Q201 is deactivated. However, the voltage drop loss of the diode D201 during long-term operation leads to low efficiency. Furthermore, if the FET Q201 breaks down, the short-circuit fault cannot be eliminated, causing the DC bus voltage to drop due to the short circuit, posing a safety concern. Therefore, a dimming module based on the BUCK topology is a safer choice.

[0063] In summary, the present invention provides a DC-powered lighting dimming module, in which DC power enters the dimming module through a DC power input module, and a dimming signal is input from a signal input module into the dimming module. After DC power is input into the dimming module, it is converted into an electric coupling signal with a coupling signal through a power electronic coupling conversion module, and is output to the lamp through a power coupling signal output module; the dimming signal is identified by a power signal coupling drive module and converted into a drive signal, and the power electronic coupling conversion module emits a low-frequency high voltage and low voltage with an amplitude of ±5V, thereby realizing the coupling output of power and signal, and further realizing the brightness adjustment of the lamps in a certain circuit of the DC lighting power supply system.

[0064] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A DC powered lighting dimming module, characterized in that: The system comprises a DC input module, a power electronic coupling conversion module, a power coupling signal output module, a signal input module and a power signal coupling drive module. The power electronic coupling conversion module is electrically connected to the DC input module, the power coupling signal output module and the power signal coupling drive module respectively. The signal input module is electrically connected to the power signal coupling drive module. The power coupling signal output module is electrically connected to an external lamp. The BUCK topology structure of the power electronic coupling conversion module includes a filter capacitor C101, an inductor L101, a resistor R101, a dummy load Rf1, a diode D101, a relay S1 and a field effect transistor Q101, wherein the gate of the field effect transistor Q101 is electrically connected to the power coupling signal driving module, the drain of the field effect transistor Q101 is electrically connected to one end of the relay S1, the source of the field effect transistor Q101 is electrically connected to the other end of the relay S1, the cathode of the diode D101 and one end of the reactor L101 respectively, the other end of the reactor L101 is electrically connected to one end of the filter capacitor C101 and one end of the dummy load Rf1 respectively, the other end of the filter capacitor C101 is electrically connected to one end of the resistor R101, and the other end of the resistor R101 is electrically connected to the other end of the dummy load Rf1 and the anode of the diode D101 respectively; The BOOST topology structure of the power electronic coupling conversion module includes a filter capacitor C201, an inductor L201, a resistor R201, a dummy load Rf2, a diode D201 and a field effect transistor Q201. The gate of the field effect transistor Q201 is electrically connected to the power coupling signal driving module, the drain of the field effect transistor Q201 is electrically connected to one end of the inductor L201 and the anode of the diode D201, respectively, the source of the field effect transistor Q201 is electrically connected to one end of the resistor R201 and one end of the dummy load Rf2, the cathode of the diode D201 is electrically connected to one end of the filter capacitor C201 and the other end of the dummy load Rf2, and the other end of the filter capacitor C201 is electrically connected to the other end of the resistor R201.

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