Intelligent isolation type LED driving ultra-low standby method

Abstract

The invention discloses an intelligent isolation type LED drive ultra-low standby method. The method comprises the following steps that S1, an intelligent control module detects a lamp turn-off control signal in real time; s2, when a lamp turn-off instruction is received, a voltage regulation instruction is sent to a primary main control chip through an isolation communication unit; s3, the primary main control chip executes output voltage reduction operation, so that the voltage of the LED load end is reduced to the lowest threshold value for maintaining the work of the intelligent control module; s4, synchronously cutting off a power supply loop of a power supply module of the high-power switch; s5, keeping the auxiliary power supply module working continuously; by synchronously cutting off the power supply circuit of the power supply module of the high-power switch, only the work of the auxiliary power supply module is kept, and the output voltage is reduced to the lowest threshold for maintaining the work of the intelligent control module, so that the unnecessary power consumption is effectively reduced. And if the power supply module adopts a flyback topological structure, the power supply module operates with low power consumption during standby, so that the standby energy consumption of the whole system is greatly reduced, the power consumption cost of a user is reduced, and the energy-saving requirement is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of LED driving, and particularly relates to an intelligent isolated LED driving ultra-low standby method. Background Art

[0002] In the field of modern lighting, LED driving technology has been continuously developed to meet the growing energy-saving and intelligent requirements. In the standby state, traditional LED driving power supplies often have relatively high power consumption problems. Usually, even when the lamp is turned off, some circuits in the driving power supply still continuously consume electrical energy, which not only causes energy waste but also increases the user's electricity cost in the long run. Some existing LED driving standby technologies fail to effectively solve the problem of reducing standby power consumption while ensuring the normal operation of the intelligent control function. On the one hand, when the lamp is turned off, in order to maintain the operation of the intelligent control module, the driving power supply cannot completely cut off unnecessary power supply circuits, resulting in relatively high standby power consumption; on the other hand, in terms of detecting the on and off signals of the lamp, the detection mechanism of traditional technologies is relatively single and difficult to meet the diverse requirements in complex scenarios. Summary of the Invention

[0003] The purpose of the present invention is to provide an intelligent isolated LED driving ultra-low standby method to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An intelligent isolated LED driving ultra-low standby method, including the following steps:

[0005] S1. The intelligent control module continuously detects the off control signal.

[0006] S2. When receiving the off command, send a voltage regulation command to the primary master chip through the isolation communication unit.

[0007] S3. The primary master chip performs an operation to reduce the output voltage, so that the voltage at the LED load end drops to the lowest threshold for maintaining the operation of the intelligent control module.

[0008] S4. Synchronously cut off the power supply circuit of the power module of the high-power switch.

[0009] S5. Keep the auxiliary power module working continuously, and restore the main power supply and standard output voltage when detecting the on signal.

[0010] Preferably, in step S2, the isolation communication unit adopts an optocoupler device, whose input end is connected to the PWM signal output end of the intelligent control module, and the output end is connected to the feedback pin of the primary master chip, avoiding instruction errors or losses caused by electrical interference and ensuring the reliable operation of the entire driving system in a complex electromagnetic environment.

[0011] Preferably, step S4 is implemented by an electromagnetic relay. The control coil of the relay is connected to the drive port of the intelligent control module, and the contact switch is connected in series in the AC input circuit of the high-power switching power supply module. The electromagnetic relay plays a key role in cutting off the power supply in the present invention. Its control coil is connected to the drive port of the intelligent control module.

[0012] Preferably, the electromagnetic relay is arranged behind the insurance device. When its contacts are disconnected, the phase wire connection of the high-power main power supply is completely cut off. In case of abnormal situations such as overload and short circuit in the circuit, the circuit is cut off in time to protect the safety of the entire system.

[0013] Preferably, the voltage reduction amplitude in step S3 is 20%-40% of the rated output voltage, which is specifically achieved by adjusting the feedback loop compensation network parameters of the primary main control chip. According to different lamp requirements and the working characteristics of the intelligent control module, the output voltage can be accurately adjusted to achieve the purpose of minimizing the standby power consumption on the premise of meeting the working requirements of the intelligent control module.

[0014] Preferably, the power supply module adopts a flyback topology structure, and its output terminal is connected to the power management chip of the intelligent control module, continuously providing a working voltage of 3.3V - 5V. In the standby state, even if only the intelligent control module is working, the power supply module can operate with low power consumption, further reducing the standby energy consumption of the entire system.

[0015] Preferably, a multi-level signal detection mechanism is set in step S1, which is built-in with a Bluetooth signal receiving module, a microwave radar sensor, and a physical switch quantity acquisition circuit, and can accurately detect the light-off control signal in various complex scenarios, providing a reliable signal source for the subsequent operation of reducing standby power consumption.

[0016] Preferably, a timed wake-up function is set in step S5. The main power supply is periodically started through the RTC clock module for device status self-check, ensuring that the lamp can work normally when needed, and can also detect potential problems in advance, reducing the device failure rate.

[0017] Preferably, the primary main control chip adopts a soft start method to reduce the output voltage in step S3, and the adjustment time is controlled within the range of 100ms - 500ms, ensuring the stability and reliability of the entire LED drive system during the process of reducing the output voltage, extending the service life of circuit components, and improving the overall performance of the system.

[0018] Preferably, a standby power consumption feedback mechanism is set. When an abnormality of the power supply module is detected, the main power supply is automatically restored, which can timely discover and handle potential problems of the power supply module, ensuring the safety and stability of the entire LED drive system in the standby state.

[0019] Compared with the prior art, the technical effects and advantages of the present invention: This intelligent isolated LED drive ultra-low standby method effectively reduces unnecessary power consumption by synchronously cutting off the power supply circuit of the power module of the high-power switch, only maintaining the operation of the auxiliary power module, and reducing the output voltage to the lowest threshold for maintaining the operation of the intelligent control module. If the power module adopts a flyback topology structure, it operates with low power consumption during standby, significantly reducing the standby energy consumption of the entire system, reducing the user's electricity cost, and meeting the energy-saving requirements.

[0020] The auxiliary power module is used to continuously supply power to the intelligent control module to ensure its normal operation in the standby state. At the same time, the optocoupler device realizes isolated communication, avoiding command errors or losses caused by electrical interference, ensuring the stable operation of the system in a complex electromagnetic environment, and maintaining the reliability of intelligent control.

[0021] A multi-level signal detection mechanism is set up, integrating a Bluetooth signal receiving module, a microwave radar sensor, and a physical switch quantity acquisition circuit, meeting the diverse switch control requirements in complex scenarios, being able to accurately detect the light-off control signal, and providing a reliable basis for reducing standby power consumption.

[0022] The electromagnetic relay is set behind the insurance device, which can not only cut off the connection of the high-power main power phase line to reduce standby power consumption, but also protect the system safety in case of circuit abnormalities; the primary main control chip adopts a soft start method to reduce the output voltage, avoiding voltage mutation impact on circuit components and extending the service life of components; setting a timed wake-up function and a standby power consumption feedback mechanism can detect potential problems in advance, timely handle power module abnormalities, ensure the normal use of the lamp, and improve the overall stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the first control diagram of the intelligent isolated LED drive ultra-low standby of the present invention;

[0024] Figure 2 It is the second control diagram of the intelligent isolated LED drive ultra-low standby of the present invention;

[0025] Figure 3 It is the third control diagram of the intelligent isolated LED drive ultra-low standby of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer toFigures 1 - 3 , the present invention provides a technical solution: an intelligent isolated LED drive ultra-low standby method, which includes the following steps:

[0028] S1. The intelligent control module uses a multi-level signal detection mechanism such as a built-in Bluetooth signal receiving module, a microwave radar sensor, and a physical switch quantity acquisition circuit to detect the light-off control signal in real time;

[0029] As Figure 1 shown, the LED drive circuit includes a main power supply input of 220V, which is connected to a high-power LED drive power supply and a dedicated power supply for the intelligent control module. A relay is connected in series in the main power supply circuit of the high-power LED drive power supply, and the control end of the relay is connected to the signal output end of the secondary intelligent module.

[0030] After receiving the light-off signal, the secondary intelligent module sends a signal to the primary main control chip through an optocoupler, and the primary main control chip controls the output voltage to decrease;

[0031] At the same time, the secondary intelligent module controls the relay to disconnect, cutting off the power supply of the high-power LED drive power supply, and only retaining the dedicated power supply for the intelligent control module to supply power to the secondary intelligent module and the primary main control chip.

[0032] When it is necessary to turn on the light, the secondary intelligent module receives the light-on instruction, sends a reset signal to the relay, the relay closes to connect the high-power LED drive power supply, and the primary main control chip restores the normal output voltage to drive the LED lamp to work normally. S2. When the intelligent control module receives the light-off instruction, it sends a voltage regulation instruction to the primary main control chip through an isolation communication unit using an optocoupler device, where the input end of the optocoupler device is connected to the PWM signal output end of the intelligent control module, and the output end is connected to the feedback pin of the primary main control chip;

[0033] The optocoupler device selects a high-speed optocoupler 6N137, which has high-speed signal transmission ability, short transmission delay time, and can meet the requirement of quickly transmitting the voltage regulation instruction. The input end of the 6N137 optocoupler is connected to the PWM signal output pin of the STM32F407 microcontroller. When receiving the light-off instruction, the microcontroller encodes the voltage regulation instruction by changing the duty cycle of the PWM signal. The output end of the optocoupler is connected to the feedback pin of the primary main control chip (model UCC28780) to achieve electrical isolation between the primary and secondary circuits, effectively avoiding interference and ensuring accurate transmission of the instruction; S3. The primary main control chip uses a soft start method to execute the output voltage reduction operation, and the adjustment time is controlled within the range of 100ms - 500ms. By adjusting the parameters of its own feedback loop compensation network, the output voltage reduction amplitude is 20% - 40% of the rated output voltage, so that the voltage at the LED load end drops to the lowest threshold to maintain the operation of the intelligent control module;

[0034] The primary master chip UCC28780 has a powerful voltage regulation function. When performing the operation of reducing the output voltage, it adopts a soft start method. By using the internal soft start circuit of the chip, the adjustment time is accurately controlled within the range of 100 ms - 500 ms. By adjusting the parameters of the resistors (such as using surface mount resistors with an accuracy of 1%) and capacitors (such as using ceramic capacitors with low ESR) in the internal feedback loop compensation network of the chip, the reduction amplitude of the output voltage is 20% - 40% of the rated output voltage. This can not only ensure that the voltage at the LED load end drops to the lowest threshold to maintain the operation of the intelligent control module, but also ensure the stability and reliability of the circuit. S4. By controlling the electromagnetic relay connected to the drive port of the intelligent control module, the power supply circuit of the power module of the high-power switch is cut off. The contact switch of this electromagnetic relay is connected in series in the AC input circuit of the high-power switch power module and is set behind the fuse device. When its contact is disconnected, the phase connection of the high-power main power supply is completely cut off;

[0035] The optocoupler uses a high-speed optocoupler (transmission delay < 10 μs) to minimize the signal transmission delay between the secondary and the primary, and at the same time achieve an electrical isolation withstand voltage ≥ 4 kV.

[0036] The relay uses a normally closed electromagnetic relay, which is set behind the fuse device of the high-power power supply to ensure complete isolation of the main power supply circuit during power-off and avoid leakage current loss.

[0037] The secondary intelligent module integrates a signal receiving unit (such as a wireless receiving module or GPIO input), a logic processing unit (microcontroller), and a dual-channel signal output unit (connected to the optocoupler and the relay respectively) to realize the generation and distribution of control signals.

[0038] The primary and the secondary are connected through an isolated communication bus (such as isolated CAN or I2C), which supports parameter configuration (such as setting the low-power threshold) and status feedback (such as reporting the power-off state) in the standby state. S5. Keep the auxiliary power module working continuously. This auxiliary power module adopts a flyback topology structure, and its output terminal is connected to the power management chip of the intelligent control module to continuously provide a working voltage of 3.3 V - 5 V. During this process, the main power supply is periodically started through the RTC clock module for device status self-check; when the intelligent control module detects a light-on signal, the main power supply is restored and the standard output voltage is provided. At the same time, a standby power consumption feedback mechanism is set up to automatically restore the main power supply and send a fault code when an abnormality in the power module is detected.

[0039] The auxiliary power supply module adopts a flyback topology structure, and this chip features high efficiency and low standby power consumption. The output terminal of the auxiliary power supply module is connected to the power management chip of the intelligent control module, continuously providing a stable working voltage of 3.3V - 5V for the intelligent control module. In the standby state, it operates with extremely low power consumption, further reducing the standby energy consumption of the entire system.

[0040] A current detection resistor (such as a constantan wire resistor) and a voltage detection circuit are set in the power supply module to monitor the working current and output voltage of the power supply module in real time. When it is detected that the power consumption of the power supply module abnormally increases (such as exceeding the set threshold) or the output voltage deviates, the electromagnetic relay is controlled by the STM32F407 microcontroller to restore the main power supply, and a fault code is sent to external devices through serial communication (such as using the MAX3232 chip for level conversion), facilitating technicians to conduct fault troubleshooting and repair.

[0041] When the user sends a light-off instruction through the intelligent terminal or the system detects that there is no current in the load for a long time (such as the load current < 5mA within 5 seconds), the logic processing unit of the secondary intelligent module generates two control signals:

[0042] One way is transmitted to the primary main control chip through an optocoupler, and the primary circuit immediately adjusts the PWM duty cycle, reducing the output voltage from 50V to 5V;

[0043] The other way directly drives the relay coil to lose power, the relay contacts disconnect, and the 220V input of the high-power power supply is cut off. At this time, only the module power supply (5V / 0.2A) supplies power to the secondary intelligent module and the primary main control chip, and the total standby power consumption is reduced to 0.3W.

[0044] Light-on recovery stage:

[0045] When a light-on signal is received, the secondary intelligent module sends a reset signal: the relay coil gets powered, the contacts close, and the high-power power supply resumes power supply; the primary main control chip synchronously resumes PWM output, and the output voltage rises to the normal working voltage within 200μs, and the LED light is normally lit.

[0046] Specifically, during use, the intelligent control module incorporates a Bluetooth signal receiving module, a microwave radar sensor, and a physical switch quantity acquisition circuit to form a multi-level signal detection mechanism. These components continuously monitor various signals in the environment, such as Bluetooth commands, microwave signal changes caused by human activities, and the actions of physical switches. Once a signal for turning off the light is detected, the intelligent control module immediately responds and provides a trigger signal for subsequent standby operations. When the intelligent control module receives the command to turn off the light, it uses an isolation communication unit composed of optocoupler devices to send a voltage regulation command to the primary master control chip. The input terminal of the optocoupler device is connected to the PWM signal output terminal of the intelligent control module, and the output terminal is connected to the feedback pin of the primary master control chip. Due to the electrical isolation characteristics of the optocoupler, it can effectively avoid electrical interference between the primary and secondary circuits while transmitting the command signal, ensuring that the command is accurately transmitted to the primary master control chip.

[0047] After receiving the voltage regulation command, the primary master control chip reduces the output voltage using a soft start method. This method controls the adjustment time within the range of 100 ms - 500 ms to avoid voltage mutations from impacting circuit components. By adjusting the parameters of its own feedback loop compensation network, the primary master control chip reduces the output voltage by 20% - 40% of the rated output voltage, thereby reducing the voltage at the LED load end to the lowest threshold for maintaining the operation of the intelligent control module and reducing energy consumption during standby. The intelligent control module controls the operation of the electromagnetic relay connected to its drive port. The contact switch of the electromagnetic relay is connected in series in the AC input circuit of the high-power switch power supply module and is located after the fuse device. When the intelligent control module issues a control signal, the contact of the electromagnetic relay disconnects, completely cutting off the phase connection of the high-power main power supply and causing the high-power switch power supply module to stop working, further reducing standby power consumption. The fuse device plays a protective role here to prevent abnormal current from damaging the electromagnetic relay and other circuit components.

[0048] After cutting off the power supply of the high-power power supply, the auxiliary power supply module continues to operate. The auxiliary power supply module adopts a flyback topology structure, and its output terminal is connected to the power management chip of the intelligent control module to provide a stable operating voltage of 3.3V - 5V for the intelligent control module, ensuring that the intelligent control module can still operate normally in the standby state. At the same time, with the help of the RTC clock module, the main power supply is periodically started for device status self-check to promptly detect potential fault hazards. When the intelligent control module detects a signal to turn on the light, it controls the electromagnetic relay to close, restoring the power supply of the high-power switch power supply module. At the same time, the primary master control chip restores the output voltage to the standard output voltage to enable the lamp to be normally lit. In addition, the system is equipped with a standby power consumption feedback mechanism. Once an abnormality in the power supply module is detected, such as excessive power consumption or abnormal voltage, etc., it will automatically restore the main power supply and send a fault code to facilitate technicians to conduct fault troubleshooting and maintenance to ensure the stable operation of the entire LED drive system.

[0049] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intelligent isolated LED drive ultra-low standby method, characterized in that It includes the following steps: S1. The intelligent control module detects the light-off control signal in real time; S2. When receiving the light-off instruction, send a voltage regulation instruction to the primary master chip through the isolation communication unit; S3. The primary master chip performs an operation to reduce the output voltage, so that the voltage at the LED load end drops to the voltage range required to maintain the operation of the intelligent control module; S4. When detecting the light-off signal, send the light-off signal to the primary relay through the optocoupler to synchronously cut off the power supply loop of the power module of the high-power switch. 2.S5. Keep the auxiliary power module working properly to continuously supply power to the intelligent module, and turn off the main power supply when detecting the light-off signal.

3. An intelligent isolated LED drive ultra-low standby method according to claim 1, characterized in that: In step S2, the isolation communication unit uses an optocoupler device, whose input end is connected to the PWM signal output end of the intelligent control module, and the output end is connected to the feedback pin of the primary master chip.

4. An intelligent isolation type LED driving ultra-low standby method according to claim 1, characterized in that: Step S4 is realized through an electromagnetic relay. The control coil of the relay is connected to the drive port of the intelligent control module, and the contact switch is connected in series in the AC input loop of the high-power switch power supply module.

5. An intelligent isolated LED drive ultra-low standby method according to claim 3, characterized in that: The electromagnetic relay is arranged after the fuse device, and when its contact is disconnected, the phase wire connection of the high-power main power supply is completely cut off.

6. An intelligent isolation type LED driving ultra-low standby method according to claim 1, characterized in that: In step S3, the amplitude of the output voltage reduction is 20%-40% of the rated output voltage, which is specifically realized by adjusting the parameters of the feedback loop compensation network of the primary master chip.

7. An intelligent isolation type LED drive ultra-low standby method according to claim 1, characterized in that: The power module adopts a flyback topology structure, and its output end is connected to the power management chip of the intelligent control module, continuously providing a working voltage of 3.3V - 5V.

8. An intelligent isolation type LED driving ultra-low standby method according to claim 1, characterized in that: In step S1, a multi-level signal detection mechanism is set, which is built-in with a Bluetooth signal receiving module, a microwave radar sensor, and a physical switch quantity acquisition circuit.

9. An intelligent isolation type LED driving ultra-low standby method according to claim 1, characterized in that: In step S5, a timed wake-up function is set, and the main power supply is periodically started through the RTC clock module to perform device status self-check.

10. An intelligent isolated LED driving ultra-low standby method according to claim 1, characterized in that: In step S3, the primary master chip adopts a soft start method to reduce the output voltage.

11. The intelligent isolation type LED drive ultra-low standby method according to claim 1, characterized in that: A standby power consumption feedback mechanism is set, and when the power module is detected to be abnormal, the main power supply is automatically restored.

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