A high-power LED circuit system capable of supporting five-way dimming

Abstract

The application discloses a high-power LED circuit system capable of supporting five-way dimming, and the high-power LED circuit system can output five-way different voltages and currents, can support different lamp beads to be mixed and used in series and parallel, can realize five-way dimming, can be favorable for providing an ideal light supplement mode for plants, and can make the plants grow more healthily, can be favorable for the plants to freely grow from seedling raising to flowering and fruiting periods without being moved in fixed positions, is favorable for user installation, can reduce energy consumption, can realize high efficiency and energy saving, can reduce use cost, and can solve the problems of fixed spectrum and incapability of full-period regulation in a plant production period.

Description

Technical Field

[0001] This invention relates to the field of plant lighting technology, and in particular to a high-power LED circuit system that supports five-way dimming. Background Technology

[0002] Plants cannot grow without light; light is essential for photosynthesis. However, in greenhouses, light is blocked, preventing plants from receiving sufficient light and thus affecting their normal growth and development. Therefore, plant lighting sources have emerged, and among the many plant lighting sources available, LEDs are widely used in plant cultivation due to their rich wavelength range and high degree of adjustability.

[0003] Existing plant supplemental lighting circuits typically only output one channel with a fixed spectrum and limited functionality. They can only adjust the spectrum and light intensity of the plant during a certain period and cannot provide supplemental lighting throughout the entire growth cycle to offer the most ideal illumination. This results in the plant not being able to fully utilize the light provided by the outside environment, causing excessive energy consumption and increasing operating costs. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a dimmable circuit system that is highly applicable, efficient, and capable of outputting five different voltages and currents.

[0005] To address the aforementioned technical problems, this invention provides a high-power LED circuit system supporting five-way dimming, comprising:

[0006] A constant current power supply module, which converts the input AC voltage into DC voltage and controls the output current of the constant current voltage module through a current loop;

[0007] The first output harness is connected to the output terminal of the constant current power supply module to form the first output;

[0008] A constant voltage power supply module converts the input AC voltage into DC voltage and controls the output voltage of the constant current voltage module through a voltage loop;

[0009] Four constant voltage BUCK power supplies are connected to the output terminals of the constant voltage power supply module;

[0010] The second output harness is connected to the four constant voltage BUCK power supplies to form a common positive output.

[0011] The four BUCK output harnesses are respectively connected to the four constant voltage BUCK power supplies to form four negative outputs;

[0012] The four PWM dimming lights are respectively connected to the four constant voltage BUCK power supplies;

[0013] The control power MCU1 is connected to the constant current power supply module through the first dimming light, and is also connected to the four PWM dimming light through the BUCK dimming*4 optocoupler;

[0014] Communication MCU2 is connected to control power MCU1. Communication MCU2 receives external dimming signals and transmits them to control power MCU1.

[0015] The lighting control board has its input and output terminals connected to the positive and negative output terminals of the first output harness, respectively. The input and output terminals of the lighting control board are also connected to the second output harness and the four-way BUCK output harness, respectively.

[0016] In one embodiment of the present invention, the constant current power supply module includes a first rectifier filter circuit, a PFC1 circuit, an LLC1 circuit, and a first synchronous rectifier circuit. The input AC voltage is converted into DC after passing through the first rectifier filter circuit, the PFC1 circuit, the LLC1 circuit, and the first synchronous rectifier circuit.

[0017] In one embodiment of the present invention, the constant current power supply module is a 480W constant current power supply, which converts the input 120-277V AC voltage into +54V and -54V DC voltage.

[0018] In one embodiment of the present invention, the constant voltage power supply module includes a second rectifier filter circuit, a PF2 circuit, an LLC2 circuit, and a second synchronous rectifier circuit. The input AC voltage is converted into DC after passing through the second rectifier filter circuit, the PFC1 circuit, the LLC1 circuit, and the second synchronous rectifier circuit. The voltage loop controls the output voltage of the constant current voltage module.

[0019] In one embodiment of the present invention, the constant voltage power supply module is a 210W constant voltage power supply, which converts the input 120-277V AC voltage into +48V and -48V DC.

[0020] In one embodiment of the present invention, an LDO chip module is also included, which is connected to the second output harness and steps down the voltage of the second output harness to power the BUCK dimming*4 optocoupler.

[0021] In one embodiment of the present invention, the first BUCK output harness has a voltage of 44V, a current of 2.6A, and a total power of 115W; the second BUCK output harness has a voltage of 36V, a current of 1.3A, and a total power of 47W; the third BUCK output harness has a voltage of 40V, a current of 0.7A, and a total power of 28W; and the fourth BUCK output harness has a voltage of 25V, a current of 0.7A, and a total power of 18W.

[0022] In one embodiment of the present invention, the communication MCU2 receives an external dimming signal through a cascaded input / output port. The external dimming signal generates an I / O level that the communication MCU2 can recognize through a 0-10V conversion module. The I / O level is transmitted to the control power MCU1 through optocoupler isolation.

[0023] In one embodiment of the present invention, the communication MCU2 is connected to the control power MCU1 via optocoupler isolation.

[0024] In one embodiment of the present invention, the constant current power supply module supplies power to the control power MCU1, and the constant voltage power supply module supplies power to the communication MCU2.

[0025] The technical solution of the present invention has the following advantages compared with the prior art:

[0026] The high-power LED circuit system of this invention, which supports five-way dimming, can output five different voltages and currents, and can support the mixing and use of different LED beads to achieve five-way dimming. This is beneficial for providing ideal supplemental lighting for plants, enabling them to grow healthier. It also allows plants to grow freely in a fixed location from seedling to flowering and fruiting without being moved, which is convenient for users to install, reduces energy consumption, achieves high efficiency and energy saving, lowers operating costs, and solves the shortcomings of fixed spectrum in the plant production cycle, which cannot be adjusted throughout the entire cycle.

[0027] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0028] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0029] Figure 1 This is a schematic diagram of a high-power LED circuit system that supports five-way dimming in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the constant current power supply module and the first output wiring harness in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the constant voltage power supply module in an embodiment of the present invention;

[0032] Figure 4This is a schematic diagram of the four-channel constant voltage power supply module, the second output harness, the four-channel BUCK output harness, the LDO chip module, and the four-channel PWM dimming light in an embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the control power MCU1, BUCK dimming*4 optocoupler, and first dimming line in an embodiment of the present invention;

[0034] Figure 6 This is a circuit diagram of the control power MCU1 in this embodiment of the invention;

[0035] Figure 7 This is a circuit diagram of the 210W dimming optocoupler in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the communication MCU2, 0-10V conversion module, optocoupler isolation, and 5-channel LED display lights in this embodiment of the invention;

[0037] Figure 9 This is a circuit diagram of the 0-10V conversion module in an embodiment of the present invention;

[0038] Figure 10 This is a circuit diagram of the 5-channel LED display and the stepless knob in an embodiment of the present invention;

[0039] Figure 11 This is a circuit diagram of the communication MCU2 in this embodiment of the invention;

[0040] Figure 12 This is a circuit diagram of the 38 decoder and the display screen in an embodiment of the present invention;

[0041] Figure 13 This is a schematic diagram of the lighting control board in an embodiment of the present invention. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0043] Reference Figure 1-13 As shown, this embodiment discloses a high-power LED circuit system that supports five-channel dimming, which includes a constant current power supply module, a first output harness, a constant voltage power supply module, four constant voltage BUCK power supplies, a second output harness, four BUCK output harnesses, four PWM dimming lines, a control power supply MCU1, a communication MCU2, and a lamp control board.

[0044] The constant current power supply module converts the input AC voltage into DC voltage and controls the output current of the constant current voltage module through a current loop.

[0045] Reference Figure 2 The constant current power supply module includes a first rectifier and filter circuit, a PFC1 circuit, an LLC1 circuit, and a first synchronous rectifier circuit. The input AC voltage is converted into DC after passing through the first rectifier and filter circuit, the PFC1 circuit, the LLC1 circuit, and the first synchronous rectifier circuit. Optionally, the constant current power supply module is a 480W constant current power supply. The 480W constant current power supply converts the input 120-277V AC voltage into +54V and -54V DC, which conforms to the SELV safety voltage range. The maximum output current can reach 10A. After a series of circuit topology conversions, the power supply efficiency is as high as 95%. The current loop controls the output current of the power supply, and it is programmable. It outputs a total of 5 core wires, with the first output wire harness (refer to...) Figure 2 The 480W output harness has two output wires and a three-core dimming wire. The three-core dimming wire is used to provide 12V voltage and dimming control, and has a high-precision and high-depth dimming range of 0-100%.

[0046] The first output harness is connected to the output terminal of the constant current power supply module to form the first output, which includes positive and negative output terminals. It only transmits current and voltage and is connected to the lighting control board.

[0047] The constant voltage power supply module converts the input AC voltage to DC voltage and controls the output voltage of the constant current voltage module through a voltage loop. (Refer to...) Figure 3 The constant voltage power supply module includes a second rectifier and filter circuit, a PF2 circuit, an LLC2 circuit, and a second synchronous rectifier circuit. The input AC voltage is converted into DC after passing through the second rectifier and filter circuit, the PFC1 circuit, the LLC1 circuit, and the second synchronous rectifier circuit. The voltage loop controls the output voltage of the constant current voltage module. Optionally, the constant voltage power supply module is a 210W constant voltage power supply, which converts the input 120-277V AC voltage into +48V and -48V DC. It outputs a total of 5 cores, including two main current lines: LED+48V and LED-48V, which meet the SELV safety voltage range. The maximum output current can reach 4.37A. After a series of circuit topology conversions, the power supply efficiency is as high as 95%. It also outputs a three-core dimming line, which is used to provide the voltage for CAN12#2. The DIM+ / DIM- power lines are used to control the power supply to receive a signal from MCU-1 to shut it down, realizing the power-on and power-off function and reducing power consumption.

[0048] Reference Figure 4 The four constant voltage BUCK power supplies are connected to the output terminals of the constant voltage power supply module; the second output harness (refer to...) Figure 4 The LED+48V output is connected to the four constant voltage BUCK power supplies to form a common positive output; the four BUCK output harnesses (refer to...) Figure 4LED-48V-1, LED-48V-2, LED-48V-3, and LED-48V-4 are respectively connected to the four constant voltage BUCK power supplies to form four negative outputs; the four PWM dimming lights are respectively connected to the four constant voltage BUCK power supplies.

[0049] Among them, four constant voltage BUCK power supplies (refer to) Figure 4 The 210W four-channel BUCK power supply has its input connected to the +48V and -48V DC outputs of the 210W constant voltage power supply. Optionally, it also includes an LDO chip module, which is connected to the second output harness and steps down the voltage of the second output harness to power the BUCK dimming*4 optocoupler. Specifically, the LDO chip module converts +48V to 12V.

[0050] The four-channel constant voltage BUCK power supply uses four constant current BUCK chips, has fewer external circuit parameters, is stable and efficient, and is a low-side BUCK circuit topology. It can provide +48V, has fewer connection lines, and has high output reliability.

[0051] Reference Figure 5-7 The control power MCU1 is connected to the constant current power supply module via the first dimming line (480W dimming line), and also connected to the four PWM dimming lines via BUCK dimming*4 optocouplers. The four PWM dimming lines receive dimming commands from the control power MCU1, transmit them through the optocouplers, and send them to the IC dimming pins of (LED PWM-1 / LED PWM-2 / LED PWM-3 / LED PWM-4) respectively, so as to adjust the current, change the power, and thus change the spectrum.

[0052] The first output LED-48-1 has a voltage of 44V, a current of 2.6A, and a total power of 115W. The LED PWM-1 is its dimming light source, which supports full-range dimming from 0-100% and has an efficiency of up to 97%.

[0053] The output LED-48-2 is the second channel, with a voltage of 36V, a current of 1.3A, and a total power of 47W. The LED PWM-2 is its dimming light, which supports full-range dimming from 0-100% and has an efficiency of up to 97%.

[0054] The output LED-48-3 is the third channel, with a voltage of 40V, a current of 0.7A, and a total power of 28W. The LED PWM-3 is its dimming light, which supports full-range dimming from 0-100% and has an efficiency of up to 96%.

[0055] The output LED-48-4 is the fourth channel, with a voltage of 25V, a current of 0.7A, and a total power of 18W. The LED PWM-4 is its dimming light, which supports full-range dimming from 0-100% and has an efficiency of up to 96%.

[0056] The constant current power supply module supplies power to the control power MCU1. Specifically, it is powered by... Figure 2 The 480W CAN12V to 5V three-core dimming wire converts the CAN 5V to power MCU-1. MCU1, controlling the power supply, sends commands to the 480W constant current power supply, allowing for adjustable current through the dimming wire, achieving deep dimming from 0-100%. It sends four signals (PWM1 / PWM2 / PWM3 / PWM4) via a BUCK dimming*4 optocoupler to the dimming pins of four ICs (LED PWM-1 / LED PWM-2 / LED PWM-3 / LED PWM-4), achieving deep dimming from 0-100%. MCU-1 connects to the 210W three-core dimming wire and sends an ON / OFF command, transmitted via an optocoupler, to control the switching of the 210W constant voltage power supply, achieving low power consumption for the entire 210W constant voltage power supply.

[0057] Reference Figure 8-11 The communication MCU2 is connected to the control power MCU1. The communication MCU2 receives external dimming signals and transmits them to the control power MCU1. Specifically, the communication MCU2 receives external dimming signals through a cascaded input / output port. The external dimming signals are converted into I / O levels recognizable by the communication MCU2 via a 0-10V conversion module. These I / O levels are transmitted to the control power MCU1 via optocoupler isolation. The control power MCU1 then sends instructions to process various commands, such as dimming, light-off standby, etc. The cascaded signal passes through the P1 terminal, is followed by an LM321 operational amplifier and an LM293 operational amplifier, and then enters the communication MCU2 to achieve cascaded dimming. The communication MCU2 is connected to the control power MCU1 via optocoupler isolation. The constant voltage power supply module supplies power to the communication MCU2.

[0058] Reference Figure 10-11 The communication MCU-2 connects to 5 LED indicators and a stepless rotary knob via an ADC2 interface for dimming. This ensures all LEDs are lit during normal operation and remain off during malfunctions.

[0059] Reference Figure 12 The MCU-2 microcontroller connects to the 38 decoder and display screen via the (CD_A / CD_B / CD_C) interface. The 38 decoder converts a 3-bit binary number into eight different outputs, transforming the input (CD_A / CD_B / CD_C) signals into eight output signals (A / B / C / D / E / F / G / DP). The power percentage value is displayed in real-time on the screen for easy viewing by the customer.

[0060] The UV control switch is connected to MCU-1, and by implementing a separate fourth UV indicator (LED-48-4), it reminds the customer whether the UV is turned on or off.

[0061] Reference Figure 13 The input and output terminals of the lighting control board are respectively connected to the positive and negative output terminals of the first output harness. Figure 2 The input and output terminals of the lighting control board are connected to the second output harness (+54V and -54V) to power the LED chips. Figure 4 It connects to +48V and four BUCK output harnesses (LED-48-1 / LED-48-2 / LED-48-3 / LED-48-4) for use with LED chips. The number of lighting control boards can be increased or decreased as needed.

[0062] When using the circuit system of this invention to supplement light for plants, the following advantages are available:

[0063] 1. Wide input voltage: Supports a full range of AC input voltage from 120V to 277V, suitable for markets in Asia, Europe, and America. It is highly versatile. All five outputs are within the SELV safe voltage range, which can protect the equipment and prevent human injury.

[0064] II. The power supply outputs five different voltages and currents, with a maximum current of 10A, which can support the connection of different LED beads for mixed string use.

[0065] All three and five power outputs are dimmable, with a high-precision and deep dimming range of 0-100%;

[0066] IV. This circuit adopts a PFC+LLC+BUCK architecture, which has high power factor and high efficiency, with a maximum efficiency of 97%.

[0067] 5. It features a real-time display interface for single-channel dimming power, making it convenient for customers to operate and use;

[0068] VI. It is compatible with stepless knobs and controllers on the market for dimming communication, and can be cascaded. One controller can control multiple plant supplemental lighting power supplies, which is convenient to use.

[0069] 7. The circuit uses multiple high-precision MCUs and optocouplers for isolation and control, which can achieve stable signal transmission, stable product operation, and low failure rate.

[0070] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A high-power LED circuit system supporting five-way dimming, characterized in that, include: A constant current power supply module, which converts the input AC voltage into DC voltage and controls the output current of the constant current voltage module through a current loop; The first output harness is connected to the output terminal of the constant current power supply module to form the first output; A constant voltage power supply module converts the input AC voltage into DC voltage and controls the output voltage of the constant current voltage module through a voltage loop; Four constant voltage BUCK power supplies are connected to the output terminals of the constant voltage power supply module; The second output harness is connected to the four constant voltage BUCK power supplies to form a common positive output. The four BUCK output harnesses are respectively connected to the four constant voltage BUCK power supplies to form four negative outputs; The four PWM dimming lights are respectively connected to the four constant voltage BUCK power supplies; The control power MCU1 is connected to the constant current power supply module through the first dimming light, and is also connected to the four PWM dimming light through the BUCK dimming*4 optocoupler; Communication MCU2 is connected to control power MCU1. Communication MCU2 receives external dimming signals and transmits them to control power MCU1. The lighting control board has its input and output terminals connected to the positive and negative output terminals of the first output harness, respectively. The input and output terminals of the lighting control board are also connected to the second output harness and the four-way BUCK output harness, respectively. The LDO chip module is connected to the second output harness and steps down the voltage of the second output harness to power the BUCK dimming*4 optocoupler.

2. The high-power LED circuit system supporting five-way dimming according to claim 1, characterized in that, The constant current power supply module includes a first rectifier and filter circuit, a PFC1 circuit, an LLC1 circuit, and a first synchronous rectifier circuit. The input AC voltage is converted into DC after passing through the first rectifier and filter circuit, the PFC1 circuit, the LLC1 circuit, and the first synchronous rectifier circuit.

3. The high-power LED circuit system supporting five-way dimming according to claim 2, characterized in that, The constant current power supply module is a 480W constant current power supply, which converts the input 120-277V AC voltage into +54V and -54V DC.

4. The high-power LED circuit system supporting five-way dimming according to claim 1, characterized in that, The constant voltage power supply module includes a second rectifier and filter circuit, a PF2 circuit, an LLC2 circuit, and a second synchronous rectifier circuit. The input AC voltage is converted into DC after passing through the second rectifier and filter circuit, the PFC1 circuit, the LLC1 circuit, and the second synchronous rectifier circuit. The voltage loop controls the output voltage of the constant current voltage module.

5. The high-power LED circuit system supporting five-way dimming according to claim 4, characterized in that, The constant voltage power supply module is a 210W constant voltage power supply, which converts the input 120-277V AC voltage into +48V and -48V DC.

6. The high-power LED circuit system supporting five-way dimming according to claim 1, characterized in that, The first of the four BUCK output harnesses has a voltage of 44V, a current of 2.6A, and a total power of 115W; the second has a voltage of 36V, a current of 1.3A, and a total power of 47W; the third has a voltage of 40V, a current of 0.7A, and a total power of 28W; and the fourth has a voltage of 25V, a current of 0.7A, and a total power of 18W.

7. The high-power LED circuit system supporting five-way dimming according to claim 1, characterized in that, The communication MCU2 receives external dimming signals through cascaded input / output ports. The external dimming signals are converted into I / O levels that can be recognized by the communication MCU2 through a 0-10V conversion module. The I / O levels are transmitted to the control power MCU1 through optocoupler isolation.

8. The high-power LED circuit system supporting five-way dimming according to claim 1, characterized in that, The communication MCU2 is connected to the control power MCU1 via optocoupler isolation.

9. The high-power LED circuit system supporting five-way dimming according to claim 1, characterized in that, The constant current power supply module supplies power to the control power MCU1, and the constant voltage power supply module supplies power to the communication MCU2.

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