Intelligent LED lighting power supply system

Abstract

The invention relates to the technical field of illumination power supply, and discloses an intelligent LED illumination power supply system, and a control method of the intelligent LED illumination power supply system comprises the steps: dynamically adjusting a driving current outputted to an LED lamp bead group based on a preset current detection circuit; the PWM duty ratio is controlled according to the LED working state feedback to realize voltage regulation; the power supply voltage is monitored based on the microcontroller unit, and automatic compensation is carried out when the voltage is abnormal so as to ensure continuous and stable operation of the LED lighting system. By dynamically adjusting various parameters in the LED lighting system, the overall working efficiency of the LED lamp can be improved, the energy consumption loss caused by voltage change is reduced, meanwhile, it is guaranteed that the system can still achieve stable operation when the external power supply condition is unstable, and the continuity of power supply and the reliability of equipment are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting power supply, and in particular to an intelligent LED lighting power supply system. Background Art

[0002] An intelligent LED lighting power supply system generally refers to a technology or system design method that ensures that LED lamps can maintain continuous and stable light output. Its purpose is to maximize the efficiency and life of the lighting system without sacrificing the lighting effect; however, this system faces the problem of how to solve the high energy consumption and unsatisfactory energy efficiency ratio in practical applications, because the efficient operation of LED lighting depends on a continuous and stable power supply.

[0003] In actual usage scenarios, it may be affected by factors such as grid fluctuations, system heat dissipation performance, and the lamp's own electrical conversion efficiency. In the long run, this may cause the operating temperature of the lighting equipment to rise and ultimately reduce its stability and reliability. Therefore, research on how to balance the power output of LEDs, improve power conversion efficiency, and optimize thermal management has become the key to improving the efficiency and continuous power supply capabilities of smart LED lighting power supply systems. Summary of the invention

[0004] The purpose of the present invention is to provide an intelligent LED lighting power supply system, which solves the problem that the intelligent LED lighting power supply system in the background technology has too high energy consumption in practical applications, resulting in poor energy efficiency and long-term power supply stability.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] An intelligent LED lighting power supply system, wherein the control method of the intelligent LED lighting power supply system comprises the following steps:

[0007] S1: Dynamically adjust the drive current output to the LED lamp bead group based on a predetermined current detection circuit;

[0008] S2: Control PWM duty cycle to achieve voltage regulation based on LED working status feedback;

[0009] S3: Based on the microcontroller unit, the power supply voltage is monitored and automatic compensation is performed when the voltage is abnormal to ensure the continuous and stable operation of the LED lighting system.

[0010] Preferably, the step S1 specifically includes:

[0011] S101: Detect and record the initial current value passing through the current detection circuit;

[0012] S102: Compare the detected initial current value with a preset target current value;

[0013] S103: If the detected initial current value is lower than the target current value, increase the driving current;

[0014] S104: if the detected initial current value is higher than the target current value, reducing the driving current;

[0015] S105: Repeatedly adjust until the drive current is stabilized near the target current value.

[0016] Preferably, the step S2 specifically includes:

[0017] S201: monitor the actual working state of the LED lamp bead group and obtain relevant parameters of the state;

[0018] S202: Determine whether the acquired parameters meet the expected ideal state;

[0019] S203: adjusting the duty cycle of the PWM signal to adjust the actual voltage to be close to the target voltage level;

[0020] S204: continuously feeding back the actual state to the control system to maintain voltage stability;

[0021] S205: Achieve stable voltage supply until the LED working state returns to normal.

[0022] Preferably, the step S3 specifically includes:

[0023] S301: The microcontroller periodically checks the voltage input of the current power supply;

[0024] S302: Compare the voltage measured in real time with a reference safety range;

[0025] S303: If the detection voltage is lower than the set lower limit or exceeds the set upper limit, the automatic compensation mechanism is triggered;

[0026] S304: Starting a compensation algorithm to correct the power output to offset the impact of voltage changes;

[0027] S305: until the power supply voltage returns to a normal range to ensure the continuous stability of the LED system.

[0028] 5. The intelligent LED lighting power supply system according to claim 1, characterized in that the specific step of S1 further comprises:

[0029] S4: Collect LED driving current signal based on the resistor voltage division principle;

[0030] S5: converting the collected current signal into a voltage signal and inputting it into a comparator;

[0031] S6: Compare the voltage signal with a preset reference voltage, and adjust the PWM generator frequency according to the comparison result;

[0032] S7: Use the adjusted PWM signal to control the LED drive current to achieve closed-loop feedback adjustment of the current.

[0033] Preferably, the specific step S6 includes:

[0034] S601: Outputting a high level or a low level to a control logic unit based on the result obtained by signal comparison;

[0035] S602: When the output is at a high level, it is determined that the collected current is higher than a set safety value, and the control logic unit reduces the PWM duty cycle until it is lower than a set safety threshold;

[0036] S603: On the contrary, when the output is at a low level, indicating that the current is lower than the lower limit of the safety range, the duty cycle of the PWM signal generator is increased to restore it to the safety range;

[0037] S604: Execute the above adjustment operation until the current falls within the target current range.

[0038] Preferably, the specific steps of S604 include:

[0039] A1: Continuously compare and dynamically adjust based on the current signal monitored in real time;

[0040] A2: When it is detected that the difference between the adjusted current value and the target setting value is within the preset error range, the adjustment is stopped;

[0041] A3: If the adjusted current exceeds the preset allowable fluctuation value, it will enter the overload protection mode;

[0042] A4: After activating the overload protection mechanism, wait for the system to cool down and then readjust the current until it returns to the calibrated level.

[0043] Preferably, A4 includes the following process:

[0044] A401: Based on the temperature control sensing device, it is determined whether the current module's operating temperature has dropped to a temperature range that allows restarting.

[0045] A402: If the system temperature drops but does not reach the safety index required for re-operation, the protection mode will continue;

[0046] A403: Once the working environment meets the startup specifications, the overload state will be automatically released and the control system will be restarted to restore the PWM duty cycle to the state at the time of interruption;

[0047] A404: After the system is back online, the current and thermal stability will be continuously monitored to ensure the reliability of the equipment during long-term operation and to prevent increased losses caused by repeated starts and stops.

[0048] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0049] 1. The current flowing through the LED lamp bead group is monitored in real time through a predetermined current detection circuit, and the driving current output to the LED lamp bead group is dynamically adjusted according to the change of the load, so that the LED can reduce unnecessary power consumption while ensuring the brightness.

[0050] 2. Use a closed-loop control system to monitor and respond to changes in the working status of the LED lamp group in a timely manner, automatically adjust the duty cycle of the PWM (pulse width modulation) signal to control the voltage input of the LED, thereby ensuring a stable current supply regardless of load changes and improving system efficiency.

[0051] 3. A monitoring module executed by a microcontroller unit (MCU) is added to periodically check and adjust the power supply voltage level. Once the system detects that the voltage in the power supply line fluctuates or drops due to other factors, it can immediately start the automatic compensation program to correct the insufficient voltage to ensure that the entire intelligent LED lighting system can work stably and continuously in a complex working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a flow chart of an intelligent LED lighting power supply system;

[0053] Figure 2 It is a flowchart of the specific steps of S1;

[0054] Figure 3 It is a flowchart of the specific steps of S2;

[0055] Figure 4 It is a flowchart of the specific steps of S3;

[0056] Figure 5 It is a further flow chart of the specific steps of S1;

[0057] Figure 6 It is the specific flow chart of S6;

[0058] Figure 7 is a flowchart of the specific steps of S604;

[0059] Figure 8 This is a flowchart of the specific steps of A4. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Reference Figure 1-8 As shown, an intelligent LED lighting power supply system of the present invention is described, which relates to a control method that effectively improves the efficiency of LED lighting and ensures long-term reliability. The system aims to solve the defects of traditional constant output LED systems, such as high energy consumption, low power supply efficiency, and inability to ensure long-term stable operation.

[0062] The first link of this control method is to dynamically adjust the power supply level value transmitted to the LED lamp combination based on the preset current detection link. The main function of this link is to accurately measure the current, and change the output drive level according to the demand in the real-time environment. This technical means can dynamically adjust the current level required by the LED according to the changes in the intensity of different ambient light. For example, at night, the power is reduced to extend the service life of the lamp source or reduce energy consumption. When the light is sufficient, the output is appropriately increased to make the lamp more eye-catching and clear, so that the entire lighting area can be used more reasonably. At the same time, it can also effectively prevent the problem of excessive heating and reduced electrical life of the lamp caused by excessive power supply, and further save electricity resources.

[0063] The second link is to adjust and optimize the voltage level applied to the port by monitoring the working status of the driven light-emitting diode and sending a signal to the main control board to change the pulse width modulation switch ratio coefficient. This process is similar to the control system of a car engine, which uses feedback information to adjust the fuel (i.e. voltage) supply. The advantage of this is that the power supply can be used more efficiently. In this link, the control system will conduct precise analysis based on the specific parameter data fed back, and finally determine the appropriate output voltage range. If abnormal fluctuations or instability of the external input power supply occur, corrective measures will be taken quickly to ensure that the entire system can smoothly transition to an ideal state of operation.

[0064] The third link uses an embedded computer as the main monitor to read the battery power status at any time. When a sudden power outage or other accidental events cause the voltage to drop, it will immediately intervene to restore the original state, thereby ensuring that the entire LED device can maintain continuous normal light emission at any time. Specifically, the microcontroller will play a core role in the real-time monitoring system. When it senses that there is a problem with the power supply or other situations that affect normal operation, it will immediately activate the corresponding emergency program for remedial treatment. This not only means that the equipment itself has a stronger ability to resist risks in the external environment and a wider range of adaptability, but more importantly, it can discover and solve problems in the first place, reducing the time users wait for maintenance while also avoiding additional costs.

[0065] The above operations are explained with examples from practical applications. For example, in an LED road sign on a city road, when the system is in a period of time when no one is using it late at night, the detector may find that there are only a few pedestrians or no pedestrians passing through the road section, and reduce the overall power supply. At this time, the microcontroller will reduce the current supplied to the LED lamp group according to the actual situation, and reduce the brightness to meet the required standards. If there is a sudden rainstorm, the surface of the street lamp is prone to accumulate water vapor to form a light-guiding film effect to enhance the brightness. At this time, the micro-control board will timely reduce the PWM value to reduce power consumption and maintain a stable operating state. When the external city power grid is out of power or the voltage fluctuates, the main control CPU will immediately draw power from the built-in battery to supplement the gap, so that the lamp will not go out instantly and cause visual impact to traffic participants. Through such comprehensive application, the method can maintain stable and continuous lighting in a variety of extreme situations, thereby significantly improving the energy efficiency and operational reliability of the system. Therefore, an intelligent LED lighting power supply system provides an efficient, stable and responsive technical solution, overcoming the defects existing in the existing LED lighting system.

[0066] In some embodiments, Figure 2 As shown in the figure, the first step is to detect and record the initial current value through the current detection circuit. The purpose of this step is to monitor the real-time working status of the system and ensure that the LED lighting device can adjust the output according to external conditions to maintain consistent brightness. For example, in a smart lamp, the microcontroller first uses a built-in or external current sensor to monitor the current flow of the LED lamp and saves the detected instantaneous value for subsequent calculations.

[0067] In the second step, the system compares the collected initial current value with the set target current value. This process is mainly to determine the deviation of the actual current value from the standard, so as to determine the next action. For example, as mentioned in the application of smart lights in the previous article, if the system sets the target to 250mA constant output at this time, and the detection result shows that the current has decayed to 245mA, then the subsequent action decision will be implemented based on this result.

[0068] The next step is to control the driving current in the circuit based on the above difference judgment. If the actual observed data falls in a smaller direction than expected, it means that the system needs to increase the current drive so that the light can return to the ideal brightness performance. Let's take this setting for analysis. Based on the fact that the detected current intensity of 245mA is less than the ideal value of 250mA, the internal parameter adjustment mechanism of the device will increase the driving intensity to compensate for this deviation.

[0069] Finally, when the actual value exceeds the preset limit, the excitation level should be reduced in the opposite direction to achieve dynamic stability of the entire system. This is the core intention of the fourth step. For example, when the sensor shows that 255mA is passing through the device, which exceeds the upper and lower limits of the established indicators, the control system will reduce the current supply to ensure stability near the established range. This process is repeated until the error is within the allowable range, ensuring that the current supply continues to maintain a position close to the preset value to maintain the consistency and reliability of the LED lighting. Through the execution cycle of the above four specific operation links, the precise control and processing tasks of the key elements in the power supply solution can be effectively completed, so that the entire device can work well in a variety of environments.

[0070] In some embodiments, Figure 3 As shown, the first step is to monitor the working status of the LED lamp group and obtain relevant parameters. This step involves continuously collecting and measuring the working current, voltage and other factors that may affect stability, such as temperature, of each LED or LED group under actual operating conditions. For example, in a certain LED lighting power supply system, the controller will continuously monitor the voltage output value and current value of the entire system to ensure that these data are within a reasonable range.

[0071] The second step is to compare the collected parameters with the preset or ideal values ​​to determine whether they meet the standards. The goal here is to verify whether the actual operating data matches the ideal state or threshold predetermined during the system design phase. Assuming that in this case, the ideal voltage is set to a fixed 12 volts, any changes below or above this value need to be marked and further processed.

[0072] Finally, after the above judgment, if the system finds that the actual situation deviates, it will enter the third step - according to the actual situation, fine-tune the duty cycle of the PWM signal used to adjust the output power intensity so that the actual output voltage value is as close to the desired target level as possible. In this case, if the monitoring finds that the actual voltage drops to less than the target value, the PWM duty cycle is increased to increase the energy obtained by the LED lamp until the voltage stabilizes and rises back to the 12-volt standard line. By continuously iterating this closed-loop control process, the system can ensure that a consistent and reliable voltage is provided for a long time until the LED group finally resumes its operation as before and no significant deviation occurs. Throughout the process, the system will continue to collect new parameter information to repeat this judgment and correction behavior to ensure that any changes can be quickly corrected.

[0073] In some embodiments, Figure 4 As shown, first, the microcontroller periodically checks the voltage input of the current power supply. This step means that when the system is running, the microcontroller is responsible for monitoring whether the voltage of the power input is in a stable state at a certain time interval to detect abnormalities in the power supply system in time. For example, the microcontroller of a smart LED desk lamp is set to read the voltage value provided by the AC / DC power adapter every five seconds to verify the input voltage.

[0074] Next, the voltage measured in real time is compared with the preset safe voltage range. This step means comparing the latest input voltage reading obtained with the pre-set standard reference value (the so-called safe operating range, for example, between plus or minus 5% of the rated value) to determine the next step of operation. For example, if the set standard voltage range fluctuates 1V above or below 5 volts, when the measured value exceeds the range, it will be considered that a deviation has occurred, and the next step will be taken to deal with the abnormal situation.

[0075] If the test result shows that the power input voltage value is not within the pre-defined allowable variation range (i.e. the voltage is too low or too high), the automatic protection measures are activated. In other words, when an abnormal signal appears in the power supply, the system will immediately start the automatic adjustment function based on this judgment, in order to prevent damage to the LED or affect the normal use of the lamp due to unstable power supply. For example, in a handheld LED searchlight powered by a lithium-ion battery, its monitoring circuit can quickly respond to the potential drop caused by excessive discharge of the lithium battery, and quickly make adjustments to respond, so that the lighting equipment can provide continuous, reliable and effective lighting effects under any conditions.

[0076] Then, the remedial plan is implemented to adjust the output value of the power supply end to correct the change problem found in the monitoring. Specifically, the corresponding control logic or specific hardware means are used, such as the use of boost and buck conversion circuits, to provide a stable and appropriate power supply current to the LED load, reducing or even eliminating the adverse changes in the brightness of the light caused by external environmental factors. Taking the LED light group in the taillight of a car as an example, the internal voltage of the car may fluctuate due to starting the engine or charging. Therefore, in order to ensure a lasting light effect, the built-in algorithm must be used to dynamically change the current and regulate the current driving conditions behind each light source, so that it can remain always bright even when the voltage is unstable.

[0077] Continue to maintain the monitoring process until the power supply returns to the expected value and reaches the acceptable range specified by the system. This part means that on the basis of completing the previous action, it is necessary to further ensure that the power supply condition has returned to normal and meets the original set requirements, so that the entire LED circuit can work smoothly and without fluctuations for a long time. Still taking the example of the vehicle warning indicator light, after the vehicle system stabilizes after a short fluctuation, the monitoring and compensation system will continue to observe whether the voltage remains within the ideal range for a period of time, and continue the protection behavior until it is confirmed that no additional voltage adjustment is required. Ultimately, this approach of ensuring that lighting fixtures always show consistent output power in different working environments and that the intensity of the change will not be offset can ensure the reliability and long life of the lighting system while meeting the daily application needs of users.

[0078] In some embodiments, Figure 5 As shown, the specific steps of the present invention for dynamically adjusting the drive current output to the LED lamp bead group based on a predetermined current detection circuit are described. First, the drive current information of the LED is collected based on the principle of resistor voltage division. This stage mainly uses a precision resistor network connected to the current path required to drive the LED. Since the current flowing through this resistor is the same as the LED current or is in a fixed ratio, the current size can be measured by measuring the change in the voltage across the detection resistor.

[0079] After that, the collected information is converted into a form that is convenient for electronic component operation and analysis, that is, from the original state to a message of a meter voltage state, and input into a special device, namely a comparison device, for further information analysis. This usually means that after pre-processing such as amplification, the voltage drop on the resistor is converted so that it can be compared with the set reference voltage for subsequent accurate and effective judgment and analysis.

[0080] Next, the standard potential value obtained is evaluated against the predetermined value and the working efficiency of the pulse width modulation device is fine-tuned according to the difference. This process refers to comparing the data obtained and processed in the early stage with a pre-set standard parameter. If the current voltage is higher, it may indicate that the LED is receiving more energy than expected; if the measured voltage is lower, it may indicate that the energy supplied to the LED may not be enough to maintain the set target intensity. According to the result of this comparison, the pulse width modulation signal is corrected to form the working rhythm of the device.

[0081] The last step is to use the modified PWM indication to control the LED power transmission intensity. In this cyclic adjustment process, the self-monitoring mechanism of the power transmission value stability is adjusted to achieve the required constant flow supply requirements. This step refers to the final pulse frequency generated after the adjustment determined in the previous step to guide the operation of the power driver. For example, the adjustment frequency can determine the brightness intensity of the LED. Therefore, when a higher light intensity output is required, it may be possible to increase the cycle frequency of the switch to allow more electricity to flow into the light source. This completes the entire closed-loop self-feedback adjustment process for managing the power supply of the LED string based on circuit adjustment under predetermined conditions.

[0082] As an example, if an LED lamp group needs a stable 2A working driving current to ensure a fixed lighting brightness, the above four processes can automatically ensure that the average conduction through the entire light-emitting diode module remains within the ideal design range even when the input power supply fluctuates greatly. Assuming that the voltage input is reduced due to environmental conditions, the actual power provided by the original constant current source is also weakened. The differential voltage on the detection impedance element is reduced and fed back into the controller. The comparison module will find that there is a gap with the target calibration and increase the duty factor of the switching device to compensate for the original decline and restore the original power distribution level. Through continuous cycles, the system will maintain the required stable current supply to the LED lamp group.

[0083] In some embodiments, Figure 6 As shown, the specific steps of adjusting the PWM generator frequency based on the comparison results described in the steps of the present invention are described. Based on the result obtained by signal comparison, a high level or a low level is output to the control logic unit; this step is the starting point of the entire adjustment mechanism. In this step, the actual measured current signal is compared with the preset threshold through a pre-set reference point. After the comparison, a logical value will be obtained. If the actual measured current exceeds the maximum allowable safety threshold, the comparator will send an indicative signal to the control logic unit. This output can be in a digital or analog form, and directly reflects whether the actual circuit operation state exceeds the expected safety limit.

[0084] When the output is high, it is determined that the collected current is higher than the set safety value, and the control logic unit reduces the PWM duty cycle until it is lower than the set safety threshold; in this step, after detecting the excessive current, the indication value obtained by the above comparison (such as a high level or other similar logic signal representation) notifies the control module (such as an MCU microcontroller unit) to start the correction mechanism, that is, to change the duty cycle of the pulse width modulation (PWM) output to change the circuit conditions and thus affect the total power consumption level of the load. In this process, the periodic switching time is usually adjusted to reduce the conduction time relatively, that is, the total current supply decreases within a certain period of time, thereby effectively controlling the working current of devices such as LEDs so that it does not exceed the preset safety standard to ensure the safe and reliable operation of the equipment and protect related hardware.

[0085] On the contrary, when the output is a low level, indicating that the current is lower than the lower limit of the safety range, the duty cycle of the PWM signal generator is increased to restore it to the safe range; on the contrary, if the comparison result shows that the current operating current is insufficient and fails to reach the preset working range bottom line, the switch connection ratio is increased by changing the pulse width to increase the power supply, thereby increasing the power of the driving load such as the LED lamp and returning to the normal working range to ensure the stability of the system operation performance.

[0086] The above adjustment operation is performed until the current falls within the target current range. After the entire process is completed, the monitoring feedback and correction actions are repeated until the actual working parameters can finally meet the predetermined standard range to achieve the purpose of stable and precise control of the power supply effect. This is like a person trying to adjust the temperature of the heating furnace in the room. At first, he will make a quick adjustment based on the difference between the indoor temperature and the expected value, and then slowly adjust it to the most ideal temperature setting. In this process, he will continue to try repeatedly to achieve precise control. Similarly, in this application scenario, the system will timely feedback and adjust the pulse mode according to the real-time monitoring situation to dynamically maintain the required current stability.

[0087] In some embodiments, Figure 7 As shown, the operational details of executing the above-mentioned adjustment operation until the current falls within the target current range in the steps of the present invention are as follows: the specific steps of continuously comparing and dynamically adjusting based on the current signal monitored in real time refer to the process of continuously collecting the actual current intensity information flowing through the system through the built-in current detection device or sensor during the operation of the system, and comparing it with the pre-defined target current setting value, and fine-tuning the system power supply parameters or controlling the working state of the LED lamp in real time according to the difference to affect the current in the circuit, thereby gradually approaching the target setting value.

[0088] Subsequently, when it is detected that the difference between the adjusted current value and the target setting value is within the preset error range, the adjustment is stopped. This means that once the difference between the actual current value obtained after adjustment and the target current setting expected by the system is less than or equal to the predetermined allowable deviation (for example, ±1% or a specific absolute value such as ±0.02A), the system will suspend any form of parameter correction activity to ensure stable power supply within the safety error threshold without the need for further adjustment.

[0089] The third part, the description of entering the overload protection mode if the adjusted current exceeds the preset allowable fluctuation value, means that if the system finds that the actual operating data exceeds the acceptable maximum fluctuation range or fails to effectively return to the ideal current range within a period of time during the adjustment process, the overload avoidance process is automatically activated to prevent component damage or safety accidents.

[0090] The last description, i.e. starting the overload protection mechanism and waiting for the system to cool down before readjusting the current until it returns to the calibrated level, means that when the system encounters an emergency situation such as overheating and takes protective action, it will not resume work immediately, but will give itself time to cool down until it returns to a normal temperature operating environment and then continue to implement necessary power output adjustments according to the original procedure to ensure that the power supply can be stabilized above the design standard smoothly, reliably and effectively, or this result can be achieved quickly in a very short time.

[0091] For example, if an LED lamp has a set target current of 0.2 amps and the system allows a maximum of ±0.01 amps (i.e., ±5% floating). If the current of the system is detected to be 0.21A, which exceeds the specified allowable error, the current will be automatically adjusted to be closer to the standard value, and fine-tuned until it is detected that 0.21 amps are reduced to the safe range of 0.19A to 0.21A specified by the system and stops operating. If it is suddenly found during the adjustment process that the power supply reaches a dangerous level of 0.24A or more, it will immediately switch to the pre-programmed protection logic to stop supplying the bulb and may dissipate heat through the heat sink until the temperature drops to the pre-defined critical value. Normal current distribution will be gradually restored until the normal operating level is fully restored. This ensures that the lighting circuit will maintain optimal efficiency under any circumstances while avoiding potential fault hazards, creating a lasting and stable light source environment for the end user.

[0092] In some embodiments, Figure 8As shown, the description of the present invention further includes the following process of waiting for the system to cool down after the step of starting the overload protection mechanism: obtaining whether the operating temperature of the current module has dropped to a temperature range that allows restart based on the temperature control sensing device. This step involves using a temperature sensing device (such as a thermistor or a temperature sensor) to obtain the current temperature data of the system in real time. The data is used to determine whether the system has cooled sufficiently to a level that can be safely turned on again. For example, in one embodiment, if the temperature sensor detects that the operating temperature of the power module drops below a preset temperature, such as below 60°C, it means that the system temperature is low enough to ensure safe startup.

[0093] If the system temperature does not drop to the safety level required to restart operation, it will continue to maintain protection mode. This means that the system will continue to remain in a protective shutdown state until its operating temperature drops to the specified limit, thereby preventing damage or other hazards that may be caused by continued operation of the equipment due to excessive temperature. If the temperature does not reach the expected safety range, the system will not restart; instead, it will continue to monitor the temperature until the condition is met.

[0094] Once the working environment meets the startup specifications, the overload state will be automatically released and the control system will be restarted to restore the PWM duty cycle to the state when it was interrupted. When the temperature control sensing device confirms that the current module's operating environment has reached the predefined allowable range, the system will automatically remove the overload protection state and restore the normal operation management of the controlled object; specifically, in the intelligent LED lighting power supply system, it automatically connects the power supply and transmits power to the LED module, and restores the pulse width modulation (PWM) signal to the percentage set before the interruption.

[0095] After the system is back online, the current and thermal stability will be continuously monitored to ensure the reliability of the equipment during long-term operation and prevent the increase of losses caused by repeated start-stop. In order to ensure that the LED lighting power supply system will not overheat during the restoration process and to ensure that the power supply stability is not affected, there will be a task specially designed to regularly detect the power input and load conditions. For example, by monitoring the input current of the LED driver circuit to ensure that it does not exceed the specified safety limit, and by continuously observing the module temperature to ensure that the system operates in a stable and acceptable operating temperature range, avoiding the problem of reduced efficiency or more frequent switching of the on and off modes caused by temperature fluctuations. In this way, the stability of the power supply system during long-term operation is effectively enhanced, and various wear and loss caused by repeated switching can also be reduced. In order to explain the role of each technical feature, this description covers all four steps and their functional descriptions, and uses a specific example to illustrate them.

[0096] In general, the control methods of the intelligent LED lighting power supply system include:

[0097] Step 1: Dynamically adjust the driving current: The current flowing through the LED lamp bead group is monitored in real time through a predetermined current detection circuit, and the driving current output to the LED lamp bead group is dynamically adjusted according to the change of the load, so that the LED can reduce unnecessary power consumption while ensuring the brightness.

[0098] Step 2: Feedback control of PWM duty cycle to achieve voltage regulation: Use a closed-loop control system to monitor and respond promptly to changes in the working status of the LED lamp group, automatically adjust the duty cycle of the PWM (pulse width modulation) signal to control the voltage input of the LED, thereby ensuring a stable current supply regardless of load changes and improving system efficiency.

[0099] Step 3: Automatic power supply voltage compensation mechanism: A monitoring module executed by the microcontroller unit (MCU) is introduced to periodically check and adjust the power supply voltage level. Once the system detects that the voltage in the power supply line fluctuates or drops due to other factors, it can immediately start the automatic compensation program to correct the insufficient voltage to ensure that the entire intelligent LED lighting system can work stably and continuously in a complex working environment.

[0100] In summary, the method proposed in the present invention effectively solves the problem that the traditional LED power supply system has high energy consumption, which affects the lighting efficiency and the sustainability of long-term operation. By dynamically adjusting various parameters in the LED lighting system, it can not only improve the overall working efficiency of the LED lamp and reduce the energy loss caused by voltage changes, but also ensure that the system can achieve stable operation when the external power supply conditions are unstable, thereby enhancing the sustainability of power supply and equipment reliability.

[0101] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent LED lighting power supply system, characterized in that: The control method of the intelligent LED lighting power supply system comprises the following steps: S1: Dynamically adjust the drive current output to the LED lamp bead group based on a predetermined current detection circuit; S2: Control PWM duty cycle to achieve voltage regulation based on LED working status feedback; S3: Based on the microcontroller unit, the power supply voltage is monitored and automatic compensation is performed when the voltage is abnormal to ensure the continuous and stable operation of the LED lighting system.

2. The intelligent LED lighting power supply system according to claim 1, characterized in that: The step of S1 specifically includes: S101: Detect and record the initial current value passing through the current detection circuit; S102: Compare the detected initial current value with a preset target current value; S103: If the detected initial current value is lower than the target current value, increase the driving current; S104: if the detected initial current value is higher than the target current value, reducing the driving current; S105: Repeatedly adjust until the drive current is stabilized near the target current value.

3. The intelligent LED lighting power supply system according to claim 1, characterized in that: The steps of S2 specifically include: S201: monitor the actual working state of the LED lamp bead group and obtain relevant parameters of the state; S202: Determine whether the acquired parameters meet the expected ideal state; S203: adjusting the duty cycle of the PWM signal to adjust the actual voltage to be close to the target voltage level; S204: continuously feeding back the actual state to the control system to maintain voltage stability; S205: Achieve stable voltage supply until the LED working state returns to normal.

4. The intelligent LED lighting power supply system according to claim 1, characterized in that: The steps of S3 specifically include: S301: The microcontroller periodically checks the voltage input of the current power supply; S302: Compare the voltage measured in real time with a reference safety range; S303: If the detection voltage is lower than the set lower limit or exceeds the set upper limit, the automatic compensation mechanism is triggered; S304: Starting a compensation algorithm to correct the power output to offset the impact of voltage changes; S305: until the power supply voltage returns to a normal range to ensure the continuous stability of the LED system.

5. The intelligent LED lighting power supply system according to claim 1, characterized in that: The specific steps of S1 also include: S4: Collect LED driving current signal based on the resistor voltage division principle; S5: converting the collected current signal into a voltage signal and inputting it into a comparator; S6: Compare the voltage signal with a preset reference voltage, and adjust the PWM generator frequency according to the comparison result; S7: Use the adjusted PWM signal to control the LED drive current to achieve closed-loop feedback adjustment of the current.

6. The intelligent LED lighting power supply system according to claim 5, characterized in that: The specific steps of S6 include: S601: Outputting a high level or a low level to a control logic unit based on the result obtained by signal comparison; S602: When the output is at a high level, it is determined that the collected current is higher than a set safety value, and the control logic unit reduces the PWM duty cycle until it is lower than a set safety threshold; S603: On the contrary, when the output is at a low level, indicating that the current is lower than the lower limit of the safety range, the duty cycle of the PWM signal generator is increased to restore it to the safety range; S604: Execute the above adjustment operation until the current falls within the target current range.

7. The intelligent LED lighting power supply system according to claim 3, characterized in that: The specific steps of S604 include: A1: Continuously compare and dynamically adjust based on the current signal monitored in real time; A2: When it is detected that the difference between the adjusted current value and the target setting value is within the preset error range, the adjustment is stopped; A3: If the adjusted current exceeds the preset allowable fluctuation value, it will enter the overload protection mode; A4: After activating the overload protection mechanism, wait for the system to cool down and then readjust the current until it returns to the calibrated level.

8. The intelligent LED lighting power supply system according to claim 7, characterized in that: The A4 includes the following process: A401: Based on the temperature control sensing device, it is determined whether the current module's operating temperature has dropped to a temperature range that allows restarting. A402: If the system temperature drops but does not reach the safety index required for re-operation, the protection mode will continue; A403: Once the working environment meets the startup specifications, the overload state will be automatically released and the control system will be restarted to restore the PWM duty cycle to the state at the time of interruption; A404: After the system is back online, the current and thermal stability will be continuously monitored to ensure the reliability of the equipment during long-term operation and to prevent increased losses caused by repeated starts and stops.

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