Centralized control type lighting circuit system
By adopting a boost voltage-regulating circuit module in the lighting circuit system, the problems of high switching power supply, inconvenient maintenance and easy damage to the lamps in the prior art are solved, and the effects of stabilizing power supply, reducing power loss and improving energy utilization are achieved.
Patent Information
- Application Number
- CN202421740562.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The switching power supply of filling lights and road lighting street lights in existing greenhouses is high and inconvenient for maintenance. The damage to the lamp is often caused by power supply problems, especially when operating at high altitudes, which is inefficient and dangerous.
A centralized lighting circuit system is designed, and the boost voltage stabilization circuit module is used as a centralized power supply power supply, including bridge rectifier circuit, transistor circuit, boost constant voltage driver chip and EMI filter. The boost voltage stabilization circuit module is used to boost 220V AC to 410V DC, and a stable output of large voltage and small current is performed.
It realizes convenient maintenance, avoids high-altitude operations, ensures stable work of LED lamps, reduces power losses, and improves energy utilization.
Smart Images
Figure CN222967115U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of circuits of electric lighting sources, in particular to a centralized control type lighting circuit system. Background Art
[0002] A large number of supplementary lights for greenhouse cultivation and road lighting street lamps are usually installed in greenhouse cultivation. Existing lamps are usually equipped with a switching power supply, which has a relatively high cost and is inconvenient for maintenance. In addition, most of the reasons for lamp failure are power supply problems. Moreover, the street lamps are installed at a relatively high position, and high-altitude operations are required for power supply maintenance, with low efficiency and high danger. In greenhouse cultivation, tens of thousands of W supplementary lights usually work together. The output voltage and output current will fluctuate instantaneously when the power supply is turned on, which is likely to damage the supplementary lights and increase the cost. Summary of the Invention
[0003] The purpose of the utility model is to provide a centralized control type lighting circuit system, aiming to overcome the above problems existing in the prior art.
[0004] To achieve the above purpose, the utility model provides the following technical solutions:
[0005] A centralized control type lighting circuit system includes a boost and voltage stabilization circuit module and several LED lamps. The above-mentioned LED lamps include an LED light source module and a linear constant current LED driving circuit; the negative pole of the above-mentioned LED light source module is connected to the linear constant current LED driving circuit, and its positive pole is connected to the positive output terminal of the above-mentioned boost and voltage stabilization circuit module.
[0006] Further, the above-mentioned boost and voltage stabilization circuit module includes a bridge rectifier circuit, a first triode circuit, a second triode circuit, and a boost type constant voltage driving chip of model MT9570;
[0007] The positive output terminal of the above-mentioned bridge rectifier circuit is grounded through a first capacitor, and is grounded after passing through a second inductor, the primary winding of a current transformer, a sixth diode, and a thirteenth polar capacitor. The positive pole of the thirteenth polar capacitor is the positive output terminal of the boost and voltage stabilization circuit module;
[0008] One end of the secondary winding of the above-mentioned current transformer is connected to the ZCD pin terminal of the above-mentioned boost type constant voltage driving chip through a twenty-second resistor, and is grounded after passing through a twentieth resistor, an eighth capacitor, and a reversely connected fourth diode; the other end of its secondary winding is grounded; the node between the twentieth resistor and the fourth diode is connected to the VCC terminal of the boost type constant voltage driving chip after passing through a third diode and the second triode circuit;
[0009] The node between the second inductor and the primary winding of the current transformer is grounded through the fourteenth resistor, the thirteenth resistor, the first triode circuit, and the sixth polarized capacitor, and the positive electrode of the sixth polarized capacitor is connected to the VCC terminal of the boost-type constant voltage driving chip.
[0010] Furthermore, the boost voltage stabilizing circuit module further includes a third triode circuit. The current output terminal of the third triode circuit is grounded through a sampling resistor and is connected to the CS pin of the boost-type constant voltage driving chip; its current input terminal is connected to the node between the primary winding of the current transformer and the sixth diode, and its control terminal is connected to the GATE pin of the boost-type constant voltage driving chip.
[0011] Furthermore, the boost voltage stabilizing circuit module further includes a spike absorption circuit, and the spike absorption circuit includes a thermistor, a second capacitor, and an eleventh capacitor;
[0012] The sixth diode, the thermistor, and the thirteenth polarized capacitor are connected in sequence; the positive electrode of the second capacitor is connected to the node between the second inductor and the primary winding of the current transformer, its negative electrode is connected to the node between the sixth diode and the thermistor, and the node between the sixth diode and the thermistor is grounded through the eleventh capacitor.
[0013] Furthermore, the linear constant current LED driving circuit includes at least one linear constant current LED driving chip of model MT7606; the DRN pin of the linear constant current LED driving chip is connected to the negative electrode of the LED light source module, its GND pin is grounded, and its CS pin is grounded through a pull-down resistor.
[0014] Furthermore, the boost voltage stabilizing circuit module further includes a two-stage composite EMI filter circuit and a surge protection circuit. The live wire and the neutral wire are connected to the input terminal of the two-stage composite EMI filter circuit, and the output terminal of the two-stage composite EMI filter circuit is connected to the input terminal of the bridge rectifier circuit;
[0015] The node between the two choke coils of the two-stage composite EMI filter circuit is connected to the ground wire through the surge protection circuit.
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0017] The present utility model adds a boost voltage stabilizing circuit module at the front end of the circuit. Taking the boost voltage stabilizing circuit module as a centralized power supply, it is convenient for maintenance and avoids working at heights. The boost voltage stabilizing circuit module boosts 220V alternating current into 410V direct current, and performs stable output of large voltage and small current, ensuring the stable operation of the linear constant current LED driving circuit, preventing the LED lamp from being damaged due to fluctuations in the input voltage, reducing power loss during transmission, and improving energy utilization efficiency. Brief Description of the Drawings
[0018] Figure 1 This is the circuit schematic diagram of the present utility model. Detailed Description of the Preferred Embodiment
[0019] The following describes the detailed embodiment of the present utility model with reference to the accompanying drawings. To fully understand the present utility model, many details are described below. However, for those skilled in the art, the present utility model can be implemented without these details.
[0020] As Figure 1 shown, a centralized control lighting circuit system includes a boost and voltage regulation circuit module 1 and an LED lamp 2. The number of LED lamps 2 is not limited to one, and in actual use, multiple LED lamps 2 are usually connected in parallel.
[0021] As Figure 1 shown, the LED lamp 2 includes an LED light source module 21 and a linear constant current LED driving circuit 22, and the negative pole of the LED light source module 21 is connected to the linear constant current LED driving circuit 22. The linear constant current LED driving circuit 22 has a relatively small structure volume. Preferably, the linear constant current LED driving circuit 22 is integrated on the light source board of the LED light source module 21.
[0022] As Figure 1 shown, the linear constant current LED driving circuit 22 includes three linear constant current LED driving chips U2 of model MT7606 connected in parallel with each other. Among them, the DRN pin (i.e., the Drian pin) of the linear constant current LED driving chip U2 is connected to the negative pole of the LED light source module 21, its GND pin is grounded, and its CS pin is grounded through a pull-down resistor. The pull-down resistor includes but is not limited to being composed of a fifth resistor R5 and a sixth resistor R5 connected in parallel, and the resistance values of the fifth resistor R5 and the sixth resistor R5 are both 20Ω. Of course, the number of linear constant current LED driving circuits 22 is not limited to three, and can be one, two, four, etc.
[0023] As Figure 1 shown, the positive pole of the LED light source module 21 is connected to the positive output terminal of the boost and voltage regulation circuit module 1.
[0024] Since the linear constant current LED driving circuit 22 is easily affected by voltage fluctuations, resulting in unstable operation of the LED lamp 2. Therefore, the present utility model adds a boost and voltage regulation circuit module 1 at the front end of the circuit, uses the boost and voltage regulation circuit module 1 as the centralized control power supply, which is convenient for maintenance. The boost and voltage regulation circuit module 1 boosts 220V alternating current to 410V direct current, and performs stable output of large voltage and small current, ensuring the stable operation of the LED light source module 21, reducing power loss during transmission, and improving energy utilization efficiency.
[0025] As Figure 1 shown in the figure, the boost and regulated voltage circuit module 1 includes a two-stage composite EMI filter circuit 11, a surge protection circuit 10, a bridge rectifier circuit 12, a first triode circuit 13, a second triode circuit 14, a boost type constant voltage drive chip U1 of model MT9570, and a second triode circuit 14.
[0026] As Figure 1 shown in the figure, the live wire L and the neutral wire N are connected to the input end of the two-stage composite EMI filter circuit 11, and the output end of the two-stage composite EMI filter circuit 11 is connected to the input end of the bridge rectifier circuit 12. The node between the two chokes of the two-stage composite EMI filter circuit 11 is connected to the ground wire G through the surge protection circuit 10.
[0027] As Figure 1 shown in the figure, the negative pole of the bridge rectifier circuit 12 is grounded. The positive output end of the bridge rectifier circuit 12 is grounded through the first capacitor C1, and is grounded after passing through the second inductor L2, the primary winding of the current transformer T1, the sixth diode C6, and the thirteenth polarized capacitor C13. The positive pole of the thirteenth polarized capacitor C13 is the positive output end of the boost and regulated voltage circuit module 1.
[0028] As Figure 1 shown in the figure, a zero-crossing detection circuit is connected to the ZCD pin of the boost type constant voltage drive chip U1. Specifically: one end of the secondary winding of the current transformer T1 is connected to the ZCD pin of the boost type constant voltage drive chip U1 through the twenty-second resistor R22, and is grounded after passing through the twentieth resistor R20, the eighth capacitor C8, and the reversely connected fourth diode D4; the other end of its secondary winding is grounded; the node between the twentieth resistor R20 and the fourth diode D4 is connected to the VCC end of the boost type constant voltage drive chip U1 through the third diode D3 and the second triode circuit 14. Among them, the current transformer T1 and the twenty-second resistor R22 form a zero-crossing detection circuit, and the current transformer T1, the twentieth resistor R20, the eighth capacitor C8, the fourth diode D4, and the third diode D3 form an auxiliary winding to supply power to the chip. The second triode circuit 14 is used to prevent the chip from being broken down due to too high input voltage.
[0029] As Figure 1 shown in the figure, a startup circuit is connected to the VCC end of the boost type constant voltage drive chip U1. Specifically: the node between the second inductor L2 and the primary winding of the current transformer T1 is grounded through the fourteenth resistor R14, the thirteenth resistor R13, the first triode circuit 13, and the sixth polarized capacitor C6, and the positive pole of the sixth polarized capacitor C6 is connected to the VCC end of the boost type constant voltage drive chip U1. Among them, the first triode circuit 13 is used to prevent the chip from being broken down due to too high input voltage.
[0030] As Figure 1As shown, the current output terminal of the third triode circuit 15 is grounded through a sampling resistor and connected to the CS pin of the boost-type constant voltage driving chip U1; its current input terminal is connected to the node between the primary winding of the current transformer T1 and the sixth diode D6, and its control terminal is connected to the GATE pin of the boost-type constant voltage driving chip U1. The above sampling resistor is composed of a first sampling resistor RS1 and a second sampling resistor RS2 connected in parallel.
[0031] As Figure 1 shown, the boost voltage stabilizing circuit module 1 further includes a spike absorption circuit 16 to make the output voltage more stable. The spike absorption circuit 16 includes a thermistor NTC1, a second capacitor C2, and an eleventh capacitor C11. Specifically: the sixth diode C6, the thermistor NTC1, and the thirteenth polarized capacitor C13 are connected in sequence. The positive electrode of the second capacitor C2 is connected to the node between the second inductor L2 and the primary winding of the current transformer T1, its negative electrode is connected to the node between the sixth diode C6 and the thermistor NTC1, and the node between the sixth diode C6 and the thermistor NTC1 is grounded through the eleventh capacitor C11. Preferably, the node between the second inductor L2 and the primary winding of the current transformer T1 is grounded through a seventh capacitor C7. More specifically, the model of the second diode D2 is 1N5408, the model of the sixth diode C6 is STTH8R06FP, the thermistor NTC1 is 2.5 - 9, the seventh capacitor C7 is 330 / 400V, the eleventh capacitor C11 is 330nF / 630V, and the thirteenth polarized capacitor C13 is 47uF / 450V.
[0032] The above is only the specific implementation manner of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modification made to the present utility model using this concept shall fall within the scope of infringement of the protection scope of the present utility model.
Claims
1. A centralized lighting circuit system, characterized in that: It comprises a boost voltage stabilizing circuit module (1) and a plurality of LED lamps (2), wherein the LED lamps (2) comprise an LED light source module (21) and a linear constant current LED drive circuit (22); the cathode of the LED light source module (21) is connected to the linear constant current LED drive circuit (22), and the anode of the LED light source module (21) is connected to the anode output terminal of the boost voltage stabilizing circuit module (1); The boost voltage stabilization circuit module (1) comprises a bridge rectifier circuit (12), a first triode circuit (13), a second triode circuit (14) and a boost constant voltage drive chip (U1) of model MT9570; The positive output end of the bridge rectifier circuit (12) is grounded via the first capacitor (C1), and is grounded via the second inductor (L2), the primary winding of the current transformer (T1), the sixth diode (C6) and the thirteenth polarity capacitor (C13), and the positive electrode of the thirteenth polarity capacitor (C13) is the positive output end of the boost voltage stabilization circuit module (1); One end of the secondary winding of the current transformer (T1) is connected to the ZCD pin end of the boost type constant voltage drive chip (U1) via a twenty-second resistor (R22), and is grounded after passing through a twentieth resistor (R20), an eighth capacitor (C8) and a reversely connected fourth diode (D4); the other end of the secondary winding is grounded; the node between the twenty-second resistor (R20) and the fourth diode (D4) is connected to the VCC end of the boost type constant voltage drive chip (U1) after passing through a third diode (D3) and a second triode circuit (14); A node between the second inductor (L2) and the primary winding of the current transformer (T1) is grounded via a fourteenth resistor (R14), a thirteenth resistor (R13), a first transistor circuit (13), and a sixth polarity capacitor (C6), and a positive electrode of the sixth polarity capacitor (C6) is connected to a VCC terminal of a boost type constant voltage drive chip (U1).
2. A centralized lighting circuit system according to claim 1, characterized in that: The boost voltage stabilization circuit module further comprises a third triode circuit (15), wherein a current output end of the third triode circuit (15) is grounded via a sampling resistor and connected to a CS pin end of a boost constant voltage drive chip (U1); Its current input end is connected to a node between a primary winding of a current transformer (T1) and a sixth diode (D6), and its control end is connected to a GATE pin end of a boost type constant voltage driving chip (U1).
3. A centralized lighting circuit system according to claim 1, characterized in that: The boost and voltage stabilization circuit module (1) further comprises a peak absorption circuit (16), wherein the peak absorption circuit (16) comprises a thermistor (NTC1), a second capacitor (C2) and an eleventh capacitor (C11); The sixth diode (C6), the thermistor (NTC1) and the thirteenth polarity capacitor (C13) are connected in sequence; the positive electrode of the second capacitor (C2) is connected to the node between the second inductor (L2) and the primary winding of the current transformer (T1), and the negative electrode thereof is connected to the node between the sixth diode (C6) and the thermistor (NTC1), and the node between the sixth diode (C6) and the thermistor (NTC1) is grounded via the eleventh capacitor (C11).
4. The centralized lighting circuit system according to claim 1, characterized in that: The boost voltage stabilization circuit module (1) further comprises a two-stage composite EMI filter circuit (11) and an anti-surge circuit (10); a live wire (L) and a neutral wire (N) are connected to the input end of the two-stage composite EMI filter circuit (11); and an output end of the two-stage composite EMI filter circuit (11) is connected to the input end of the bridge rectifier circuit (12); The node between the two choke coils of the two-stage composite EMI filter circuit (11) is connected to the ground line (G) via the surge protection circuit (10).
5. A centralized lighting circuit system according to any one of claims 1 to 4, characterized in that: The linear constant current LED driving circuit (22) comprises at least one linear constant current LED driving chip (U2) of model MT7606; the DRN pin end of the linear constant current LED driving chip (U2) is connected to the negative electrode of the LED light source module (21), the GND pin end thereof is grounded, and the CS pin end thereof is grounded via a pull-down resistor.