Power adapter parameter dynamic optimization method for prolonging service life of equipment

Abstract

The invention discloses a power adapter parameter dynamic optimization method for prolonging the service life of equipment, and relates to the technical field of adapter performance optimization, and the method comprises the steps: monitoring and recording the output voltage, current and power factor parameter changes of a power adapter in real time under static and dynamic load conditions by using a test instrument; identifying the trend and reason of abnormal parameter change; performing thermal design optimization and temperature management on the power adapter; performing over-power and over-current limitation on the pulses one by one; introducing a power factor correction circuit; optimizing the switching frequency and the design of an output filter; a load line adjusting circuit is introduced, and space is reserved for dynamic ripples when output current jumps; and evaluating whether the optimization effect reaches an expected target or not. By introducing the power factor correction circuit and the load line adjustment circuit, the power factor of the power adapter is improved, the harmonic pollution is reduced, the stability of the output voltage of the power adapter is improved, and the performance of the power adapter under the dynamic load condition is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of adapter performance optimization, and in particular to a method for dynamically optimizing parameters of a power adapter for extending the life of equipment. Background Art

[0002] With the popularity of electronic devices and the diversification of their functions, the stability and reliability of the performance of power adapters, as an important part of electronic devices, have become particularly important. In the design, production and use of power adapters, key parameters such as output voltage, current and power factor under various load conditions need to be monitored and recorded in real time to ensure that they meet technical specifications and to promptly discover and resolve potential performance problems. In addition, with the improvement of energy conservation, emission reduction and environmental awareness, the requirements for energy efficiency and harmonic pollution of power adapters are becoming higher and higher.

[0003] In traditional power adapter testing, parameter monitoring and recording often rely on manual operations, which are prone to large errors and low efficiency. At the same time, traditional methods often have difficulty accurately capturing and recording parameter changes under dynamic load conditions. During the use of the power adapter, abnormal changes in parameters may occur due to environmental factors, load changes, or device aging. Traditional methods often have difficulty in timely detecting and identifying these abnormal changes, which affects the stability and reliability of the power adapter. Summary of the invention

[0004] In order to solve the above technical problems, a method for dynamically optimizing power adapter parameters for extending the life of equipment is provided. This technical solution solves the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: A method for dynamically optimizing power adapter parameters for extending device life, comprising: Use test instruments to monitor and record the output voltage, current and power factor parameter changes of the power adapter under static and dynamic load conditions in real time; Compare monitoring data with the technical specifications of the power adapter, analyze whether parameter changes are within the preset range, and identify the trend and cause of abnormal parameter changes; By improving the heat dissipation design and introducing a temperature protection mechanism, the thermal design and temperature management of the power adapter are optimized; The pulse-by-pulse over-power and over-current limiting technology is used to limit the over-power and over-current of each pulse and to protect the output of the power adapter from overload. Introduce power factor correction circuit to improve the power factor of the power adapter and reduce the harmonic pollution of the power adapter; Optimize switching frequency and output filter design to balance switching loss and output filter size; Introduce load line adjustment circuit to leave room for dynamic ripple when output current jumps and reduce the peak value of dynamic ripple peak; Use the test instrument to re-monitor the parameter changes of the power adapter, compare the data before and after optimization, and evaluate whether the optimization effect has achieved the expected goal.

[0006] Preferably, the use of a test instrument to monitor and record in real time the output voltage, current and power factor parameter changes of the power adapter under static and dynamic load conditions specifically includes: Connect the positive and negative poles of the test instrument to the positive and negative output terminals of the power adapter respectively; The static load condition is a constant resistance load, and the dynamic load condition is a load change that simulates real operating conditions; Connect the preset static load to the power adapter; Turn on the power adapter and use the test instrument to monitor and record the output voltage, current and power factor parameters in real time. After the readings stabilize, record the stable values ​​of each parameter. Based on the preset dynamic load conditions, the load test equipment is used to simulate the load change process under real operating conditions; During the load change process, use the test instrument to monitor and record the changes in the output voltage, current and power factor parameters in real time, and record the time point, change range and change trend information of the parameters; The transient response characteristics of the power adapter under dynamic load conditions are analyzed, wherein the transient response characteristics include the recovery time of the output voltage, the fluctuation of the current and the variation range of the power factor.

[0007] Preferably, the thermal design optimization and temperature management of the power adapter by improving the heat dissipation design and introducing a temperature protection mechanism specifically include: Add heat sink and thermal conductive adhesive materials inside the power adapter to enhance the heat conduction between components and the heat sink; Aluminum is selected as the high thermal conductivity material for the heat sink and heat sink, and thermal conductive adhesive material is added between the contact surfaces to enhance the heat conduction between components and heat sink; Conduct thermal simulation tests to verify the effectiveness and reliability of the heat dissipation design, and test the temperature changes of the power adapter under at least one working environment by simulating its actual working environment; Optimize and adjust the heat dissipation design based on thermal simulation test results; Using temperature sensor elements, a temperature monitoring point is set inside the power adapter to monitor its working temperature in real time; Set temperature thresholds based on the rated operating temperature and heat dissipation capabilities of the power adapter; Determine whether the real-time operating temperature of the temperature monitoring point exceeds the temperature threshold. If so, the temperature protection mechanism is triggered, the AC input line of the power adapter is cut off, the output power is reduced and the modulation pulse output is forced to be turned off. If not, no output is made.

[0008] Preferably, the pulse-by-pulse overpower and overcurrent limiting technology is used to limit overpower and overcurrent on a pulse-by-pulse basis, and the output of the power adapter is overload protected, specifically including: A sampling resistor with a known resistance is connected in series with the primary winding, and the current and voltage values ​​of each pulse are obtained by detecting the voltage drop across the resistor. The product of the monitored current and voltage values ​​is output as the power value of each pulse; Based on the rated power and current limit of the power adapter, set the power safety threshold and current safety threshold; Determine whether the power value of each pulse monitored exceeds the set power safety threshold. If so, the output is an over-power situation, terminate the current pulse, use pulse width modulation technology to control the on-time of the power switch device by reducing the duty cycle of the pulse, and reduce the switching frequency to adjust the output power. If not, no output is made; Determine whether the current value of each pulse monitored exceeds the set current safety threshold. If so, the output is an overcurrent condition, and the control circuit is used to terminate the conduction pulse of the power switch device in advance to limit the current peak value within the pulse cycle. If not, no output is made; After confirming the cause of the overload and resolving it, manually restart the power adapter to restore output.

[0009] Preferably, the introduction of a power factor correction circuit to improve the power factor of the power adapter and reduce the harmonic pollution of the power adapter specifically includes: Introducing boost power factor correction circuit; A full-wave rectifier bridge consisting of four diodes is used to convert the sinusoidal AC voltage into a unipolar pulsating DC voltage; The boost inductor stores energy when the switch is turned on and releases energy when it is turned off. Calculate the inductance value of the boost inductor based on the input voltage range, output power, and switching frequency parameters; The switch tube uses a metal-oxide-semiconductor field-effect transistor, which is driven by a control signal and periodically turns on and off based on a preset cycle to control the charging and discharging process of the inductor; When the switch is turned off, the freewheeling diode provides a path for the inductor current, and the energy in the inductor is transferred to the output end; The output capacitor smoothes the output voltage and reduces the output voltage ripple, and the capacitance value of the output capacitor is determined based on the output voltage ripple requirement and the output power; The control circuit detects the input voltage, input current and output voltage signals, and generates a drive signal based on the hysteresis current control strategy to control the on and off of the switch tube to achieve power factor correction; The inductor current is compared with a preset reference current. When the inductor current exceeds the preset reference current upper limit, the switch tube is turned off. When the inductor current is lower than the preset reference current lower limit, the switch tube is turned on. The inductance value of the boost inductor is: , In the formula, is the inductance value of the boost inductor, is the minimum value of the input voltage, is the output power, is the switching frequency, is the output voltage; The capacitance value of the output capacitor is: , In the formula, is the capacitance value of the output capacitor, is the output voltage ripple, is the frequency of the input AC power.

[0010] Preferably, the optimizing the switching frequency and the output filter design, and balancing the switching loss and the output filter size specifically include: According to the topological structure of the switching power supply, analyze the influence of switching frequency on switching loss; Energy loss is generated during the switching process of the switch tube, and the loss is proportional to the switching frequency; The electronic filter is composed of inductors and capacitors, and the set frequency signal is filtered by using the characteristics of inductors and capacitors presenting different impedances to signals of different frequencies; Obtain the parameter values ​​of inductors and capacitors in electronic filters based on the selected switching frequency and output voltage ripple requirements; The conduction loss of the switch tube is obtained by calculating the product of the square of the root mean square current of the switch tube and the on-resistance of the switch tube. The switching loss of the switch tube is obtained by calculating the product of the switching frequency and the sum of the turn-on and turn-off energies of the switch tube.

[0011] Preferably, the introduction of the load line adjustment circuit to leave room for the dynamic ripple when the output current jumps and to reduce the peak value of the dynamic ripple peak specifically includes: Introducing an adjustable resistor at the output end, by changing the relationship between output current and output voltage, the output voltage is adjusted when the output current jumps, leaving room for dynamic ripple; Select the resistance range of the adjustable resistor based on the power level and output characteristics of the power adapter; Connect the adjustable resistor element to the output end of the power adapter, build a load line adjustment circuit, and conduct preliminary tests to verify the stability of the circuit and the suppression effect on dynamic ripple; Connect a ripple monitoring device to the output end of the power adapter to monitor the dynamic ripple of the output current when it changes in real time; Based on the monitoring results, a load line adjustment strategy is formulated. When the output current increases, the output voltage is reduced to reduce the rising edge of the dynamic ripple. When the output current decreases, the output voltage is raised to reduce the falling edge of the dynamic ripple. The microcontroller implements an automatic adjustment mechanism to adjust the load line in real time based on the change of output current, dynamically controlling the output voltage and ripple; Performing performance testing on the power adapter under at least one load condition to verify the load line adjustment circuit's suppression effect on dynamic ripple; Integrate proven and optimized load line regulation circuits into power adapters.

[0012] Compared with the prior art, the present invention has the following beneficial effects: By introducing power factor correction circuit and load line adjustment circuit, the power factor of the power adapter is improved, harmonic pollution is reduced, the output voltage stability of the power adapter is improved, and its performance under dynamic load conditions is improved. The pulse-by-pulse overpower and overcurrent limiting technology is adopted to accurately protect the output of the power adapter from overload, which helps to prevent the power adapter from being damaged under overload conditions while ensuring its stable operation under normal load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A flow chart of a method for dynamically optimizing power adapter parameters for extending the life of equipment according to the present invention; Figure 2 A flow chart of a method for real-time monitoring and recording of changes in output voltage, current and power factor parameters of a power adapter according to the present invention; Figure 3 A flow chart of a method for thermal design optimization and temperature management of a power adapter according to the present invention; Figure 4 The flowchart of the pulse-by-pulse over-power and over-current limiting technology method of the present invention is as follows; Figure 5 A flow chart of a method for introducing a power factor correction circuit according to the present invention; Figure 6 A flow chart of the method for optimizing switching frequency and output filter design, balancing switching loss and output filter size of the present invention; Figure 7This is a flow chart of the method for introducing a load line adjustment circuit of the present invention. DETAILED DESCRIPTION

[0014] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0015] Reference Figure 1 As shown, a method for dynamically optimizing power adapter parameters for extending device life includes: Use test instruments to monitor and record the output voltage, current and power factor parameter changes of the power adapter under static and dynamic load conditions in real time; Compare monitoring data with the technical specifications of the power adapter, analyze whether parameter changes are within the preset range, and identify the trend and cause of abnormal parameter changes; By improving the heat dissipation design and introducing a temperature protection mechanism, the thermal design and temperature management of the power adapter are optimized; The pulse-by-pulse over-power and over-current limiting technology is used to limit the over-power and over-current of each pulse and to protect the output of the power adapter from overload. Introduce power factor correction circuit to improve the power factor of the power adapter and reduce the harmonic pollution of the power adapter; Optimize switching frequency and output filter design to balance switching loss and output filter size; Introduce load line adjustment circuit to leave room for dynamic ripple when output current jumps and reduce the peak value of dynamic ripple peak; Use the test instrument to re-monitor the parameter changes of the power adapter, compare the data before and after optimization, and evaluate whether the optimization effect has achieved the expected goal.

[0016] Reference Figure 2 As shown, the test instrument is used to monitor and record the output voltage, current and power factor parameter changes of the power adapter under static and dynamic load conditions in real time, including: Connect the positive and negative poles of the test instrument to the positive and negative output terminals of the power adapter respectively; The static load condition is a constant resistance load, and the dynamic load condition is a load change that simulates real operating conditions; Connect the preset static load to the power adapter; Turn on the power adapter and use the test instrument to monitor and record the output voltage, current and power factor parameters in real time. After the readings stabilize, record the stable values ​​of each parameter. Based on the preset dynamic load conditions, the load test equipment is used to simulate the load change process under real operating conditions; During the load change process, use the test instrument to monitor and record the changes in the output voltage, current and power factor parameters in real time, and record the time point, change range and change trend information of the parameters; The transient response characteristics of the power adapter under dynamic load conditions are analyzed, wherein the transient response characteristics include the recovery time of the output voltage, the fluctuation of the current and the variation range of the power factor.

[0017] Based on the preset dynamic load conditions, load test equipment (such as a programmable load simulator) is used to simulate the load changes under real operating conditions. These changes may include sudden increases or decreases in load, periodic changes, etc. The transient response characteristics include the output voltage recovery time (i.e. the time required from the start of load change to the output voltage returning to a stable value), the current fluctuation (i.e. the change of current value during load change) and the power factor change range (i.e. the maximum and minimum values ​​of the power factor during load change).

[0018] Reference Figure 3 As shown in the figure, by improving the heat dissipation design and introducing a temperature protection mechanism, the thermal design optimization and temperature management of the power adapter include: Add heat sink and thermal conductive adhesive materials inside the power adapter to enhance the heat conduction between components and the heat sink; Aluminum is selected as the high thermal conductivity material for the heat sink and heat sink, and thermal conductive adhesive material is added between the contact surfaces to enhance the heat conduction between components and heat sink; Conduct thermal simulation tests to verify the effectiveness and reliability of the heat dissipation design, and test the temperature changes of the power adapter under at least one working environment by simulating its actual working environment; Optimize and adjust the heat dissipation design based on thermal simulation test results; Using temperature sensor elements, a temperature monitoring point is set inside the power adapter to monitor its working temperature in real time; Set temperature thresholds based on the rated operating temperature and heat dissipation capabilities of the power adapter; Determine whether the real-time operating temperature of the temperature monitoring point exceeds the temperature threshold. If so, the temperature protection mechanism is triggered, the AC input line of the power adapter is cut off, the output power is reduced and the modulation pulse output is forced to be turned off. If not, no output is made.

[0019] Temperature sensor elements are set at key locations inside the power adapter (such as near heat-generating components such as power tubes and transformers) to monitor their operating temperature in real time. A reasonable temperature threshold is set based on the rated operating temperature and heat dissipation capacity of the power adapter. This threshold should be lower than the tolerance temperature of the components to ensure that the temperature protection mechanism can be triggered when the temperature is reached or exceeded.

[0020] Reference Figure 4 As shown, the pulse-by-pulse over-power and over-current limiting technology is adopted to limit the over-power and over-current of each pulse, and the overload protection of the output of the power adapter is provided. Specifically, the following are included: A sampling resistor with a known resistance is connected in series with the primary winding, and the current and voltage values ​​of each pulse are obtained by detecting the voltage drop across the resistor. The product of the monitored current and voltage values ​​is output as the power value of each pulse; Based on the rated power and current limit of the power adapter, set the power safety threshold and current safety threshold; Determine whether the power value of each pulse monitored exceeds the set power safety threshold. If so, the output is an over-power situation, terminate the current pulse, use pulse width modulation technology to control the on-time of the power switch device by reducing the duty cycle of the pulse, and reduce the switching frequency to adjust the output power. If not, no output is made; Determine whether the current value of each pulse monitored exceeds the set current safety threshold. If so, the output is an overcurrent condition, and the control circuit is used to terminate the conduction pulse of the power switch device in advance to limit the current peak value within the pulse cycle. If not, no output is made; After confirming the cause of the overload and resolving it, manually restart the power adapter to restore output.

[0021] After detecting overpower or overcurrent, the power adapter enters a protection state and stops supplying power to the load. The display panel or indicator light displays an overload warning, prompting the user to check whether there is a fault in the load or the power adapter itself. The user needs to confirm the cause of the overload and resolve it, such as replacing an oversized load, repairing a short circuit, etc. After resolving the cause of the overload, the user manually presses the restart button or restarts the power adapter through a software command to restore normal output.

[0022] Reference Figure 5 As shown, the power factor correction circuit is introduced to improve the power factor of the power adapter and reduce the harmonic pollution of the power adapter. Specifically, it includes: Introducing boost power factor correction circuit; A full-wave rectifier bridge consisting of four diodes is used to convert the sinusoidal AC voltage into a unipolar pulsating DC voltage; The boost inductor stores energy when the switch is turned on and releases energy when it is turned off. Calculate the inductance value of the boost inductor based on the input voltage range, output power, and switching frequency parameters; The switch tube uses a metal-oxide-semiconductor field-effect transistor, which is driven by a control signal and periodically turns on and off based on a preset cycle to control the charging and discharging process of the inductor; When the switch is turned off, the freewheeling diode provides a path for the inductor current, and the energy in the inductor is transferred to the output end; The output capacitor smoothes the output voltage and reduces the output voltage ripple, and the capacitance value of the output capacitor is determined based on the output voltage ripple requirement and the output power; The control circuit detects the input voltage, input current and output voltage signals, and generates a drive signal based on the hysteresis current control strategy to control the on and off of the switch tube to achieve power factor correction; The inductor current is compared with a preset reference current. When the inductor current exceeds the preset reference current upper limit, the switch tube is turned off. When the inductor current is lower than the preset reference current lower limit, the switch tube is turned on. The inductance value of the boost inductor is: , In the formula, is the inductance value of the boost inductor, is the minimum value of the input voltage, is the output power, is the switching frequency, is the output voltage; The capacitance value of the output capacitor is: , In the formula, is the capacitance value of the output capacitor, is the output voltage ripple, is the frequency of the input AC power.

[0023] A boost power factor correction circuit is introduced into the power adapter. This circuit structure can effectively shape the input current into a sine wave with the same waveform as the input voltage, thereby improving the power factor and reducing harmonic pollution. The hysteresis current control strategy is a simple and effective current control method. By comparing the inductor current with the preset reference current to generate the on and off signals of the switch tube, this process realizes the precise control of the input current waveform, thereby improving the power factor.

[0024] Reference Figure 6 As shown, optimizing the switching frequency and output filter design, balancing the switching loss and output filter size specifically include: According to the topological structure of the switching power supply, analyze the influence of switching frequency on switching loss; Energy loss is generated during the switching process of the switch tube, and the loss is proportional to the switching frequency; The electronic filter is composed of inductors and capacitors, and the set frequency signal is filtered by using the characteristics of inductors and capacitors presenting different impedances to signals of different frequencies; Obtain the parameter values ​​of inductors and capacitors in electronic filters based on the selected switching frequency and output voltage ripple requirements; The conduction loss of the switch tube is obtained by calculating the product of the square of the root mean square current of the switch tube and the on-resistance of the switch tube. The switching loss of the switch tube is obtained by calculating the product of the switching frequency and the sum of the turn-on and turn-off energies of the switch tube.

[0025] Based on the trade-off between switching loss and output filter size, a switching frequency value is initially set. This value should not only meet the output voltage ripple requirements, but also control the switching loss within an acceptable range. After the simulation verification is passed, the actual circuit is built for experimental testing. During the test, the focus should be on switching loss, output voltage ripple and filter performance. According to the test results, the switching frequency and filter parameters are fine-tuned to ensure that the final design meets all requirements.

[0026] Reference Figure 7 As shown, a load line adjustment circuit is introduced to leave room for dynamic ripple when the output current jumps and reduce the peak value of the dynamic ripple peak. Specifically, the following are included: Introducing an adjustable resistor at the output end, by changing the relationship between output current and output voltage, the output voltage is adjusted when the output current jumps, leaving room for dynamic ripple; Select the resistance range of the adjustable resistor based on the power level and output characteristics of the power adapter; Connect the adjustable resistor element to the output end of the power adapter, build a load line adjustment circuit, and conduct preliminary tests to verify the stability of the circuit and the suppression effect on dynamic ripple; Connect a ripple monitoring device to the output end of the power adapter to monitor the dynamic ripple of the output current when it changes in real time; Based on the monitoring results, a load line adjustment strategy is formulated. When the output current increases, the output voltage is reduced to reduce the rising edge of the dynamic ripple. When the output current decreases, the output voltage is raised to reduce the falling edge of the dynamic ripple. The microcontroller implements an automatic adjustment mechanism to adjust the load line in real time based on the change of output current, dynamically controlling the output voltage and ripple; Performing performance testing on the power adapter under at least one load condition to verify the load line adjustment circuit's suppression effect on dynamic ripple; Integrate proven and optimized load line regulation circuits into power adapters.

[0027] Write a control program for the microcontroller to implement an automatic adjustment mechanism based on output current changes. The program should be able to read the output current value in real time, calculate and adjust the resistance of the adjustable resistor according to the preset load line adjustment strategy, so as to dynamically control the output voltage and ripple. Integrate the microcontroller into the load line adjustment circuit to ensure its correct connection with the adjustable resistor and the output end of the power adapter.

[0028] Furthermore, the present solution also proposes a computer-readable storage medium on which a computer-readable program is stored. When the computer-readable program is called, the above-mentioned method for dynamically optimizing power adapter parameters for extending the life of the device is executed.

[0029] It is understandable that the storage medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state drive (SSD).

[0030] In summary, the advantages of the present invention are: by introducing a power factor correction circuit and a load line adjustment circuit, the power factor of the power adapter is improved, harmonic pollution is reduced, the output voltage stability of the power adapter is improved, and its performance under dynamic load conditions is improved. By adopting pulse-by-pulse overpower and overcurrent limiting technology, the output of the power adapter can be accurately protected from overload, which helps to prevent the power adapter from being damaged under overload conditions while ensuring its stable operation under normal load conditions.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for dynamically optimizing power adapter parameters for extending device life, characterized in that: include: Use test instruments to monitor and record the output voltage, current and power factor parameter changes of the power adapter under static and dynamic load conditions in real time; Compare monitoring data with the technical specifications of the power adapter, analyze whether parameter changes are within the preset range, and identify the trend and cause of abnormal parameter changes; By improving the heat dissipation design and introducing a temperature protection mechanism, the thermal design and temperature management of the power adapter are optimized; The pulse-by-pulse over-power and over-current limiting technology is used to limit the over-power and over-current of each pulse and to protect the output of the power adapter from overload. Introduce power factor correction circuit to improve the power factor of the power adapter and reduce the harmonic pollution of the power adapter; Optimize switching frequency and output filter design to balance switching loss and output filter size; Introduce load line adjustment circuit to leave room for dynamic ripple when output current jumps and reduce the peak value of dynamic ripple peak; Use the test instrument to re-monitor the parameter changes of the power adapter, compare the data before and after optimization, and evaluate whether the optimization effect has achieved the expected goal.

2. A method for dynamically optimizing power adapter parameters for extending device life according to claim 1, characterized in that: The use of a test instrument to monitor and record in real time the output voltage, current and power factor parameter changes of the power adapter under static and dynamic load conditions specifically includes: Connect the positive and negative poles of the test instrument to the positive and negative output terminals of the power adapter respectively; The static load condition is a constant resistance load, and the dynamic load condition is a load change that simulates real operating conditions; Connect the preset static load to the power adapter; Turn on the power adapter and use the test instrument to monitor and record the output voltage, current and power factor parameters in real time. After the readings stabilize, record the stable values ​​of each parameter. Based on the preset dynamic load conditions, the load test equipment is used to simulate the load change process under real operating conditions; During the load change process, use the test instrument to monitor and record the changes in the output voltage, current and power factor parameters in real time, and record the time point, change range and change trend information of the parameters; The transient response characteristics of the power adapter under dynamic load conditions are analyzed, wherein the transient response characteristics include the recovery time of the output voltage, the fluctuation of the current and the variation range of the power factor.

3. A method for dynamically optimizing power adapter parameters for extending device life according to claim 2, characterized in that: The thermal design optimization and temperature management of the power adapter by improving the heat dissipation design and introducing a temperature protection mechanism specifically include: Add heat sink and thermal conductive adhesive materials inside the power adapter to enhance the heat conduction between components and the heat sink; Aluminum is selected as the high thermal conductivity material for the heat sink and heat sink, and thermal conductive adhesive material is added between the contact surfaces to enhance the heat conduction between components and heat sink; Conduct thermal simulation tests to verify the effectiveness and reliability of the heat dissipation design, and test the temperature changes of the power adapter under at least one working environment by simulating its actual working environment; Optimize and adjust the heat dissipation design based on thermal simulation test results; Using temperature sensor elements, a temperature monitoring point is set inside the power adapter to monitor its working temperature in real time; Set temperature thresholds based on the rated operating temperature and heat dissipation capabilities of the power adapter; Determine whether the real-time operating temperature of the temperature monitoring point exceeds the temperature threshold. If so, the temperature protection mechanism is triggered, the AC input line of the power adapter is cut off, the output power is reduced and the modulation pulse output is forced to be turned off. If not, no output is made.

4. A method for dynamically optimizing power adapter parameters for extending equipment life according to claim 3, characterized in that: The pulse-by-pulse overpower and overcurrent limiting technology is used to limit overpower and overcurrent on a pulse-by-pulse basis, and the output of the power adapter is overload protected, specifically including: A sampling resistor with a known resistance is connected in series with the primary winding, and the current and voltage values ​​of each pulse are obtained by detecting the voltage drop across the resistor. The product of the monitored current and voltage values ​​is output as the power value of each pulse; Based on the rated power and current limit of the power adapter, set the power safety threshold and current safety threshold; Determine whether the power value of each pulse monitored exceeds the set power safety threshold. If so, the output is an over-power situation, terminate the current pulse, use pulse width modulation technology to control the on-time of the power switch device by reducing the duty cycle of the pulse, and reduce the switching frequency to adjust the output power. If not, no output is made; Determine whether the current value of each pulse monitored exceeds the set current safety threshold. If so, the output is an overcurrent condition, and the control circuit is used to terminate the conduction pulse of the power switch device in advance to limit the current peak value within the pulse cycle. If not, no output is made; After confirming the cause of the overload and resolving it, manually restart the power adapter to restore output.

5. A method for dynamically optimizing power adapter parameters for extending equipment life according to claim 4, characterized in that: The introduction of the power factor correction circuit to improve the power factor of the power adapter and reduce the harmonic pollution of the power adapter specifically includes: Introducing boost power factor correction circuit; A full-wave rectifier bridge consisting of four diodes is used to convert the sinusoidal AC voltage into a unipolar pulsating DC voltage; The boost inductor stores energy when the switch is turned on and releases energy when it is turned off. Calculate the inductance value of the boost inductor based on the input voltage range, output power, and switching frequency parameters; The switch tube uses a metal-oxide-semiconductor field-effect transistor, which is driven by a control signal and periodically turns on and off based on a preset cycle to control the charging and discharging process of the inductor; When the switch is turned off, the freewheeling diode provides a path for the inductor current, and the energy in the inductor is transferred to the output end; The output capacitor smoothes the output voltage and reduces the output voltage ripple, and the capacitance value of the output capacitor is determined based on the output voltage ripple requirement and the output power; The control circuit detects the input voltage, input current and output voltage signals, and generates a drive signal based on the hysteresis current control strategy to control the on and off of the switch tube to achieve power factor correction; The inductor current is compared with a preset reference current. When the inductor current exceeds the preset reference current upper limit, the switch tube is turned off. When the inductor current is lower than the preset reference current lower limit, the switch tube is turned on. The inductance value of the boost inductor is: , In the formula, is the inductance value of the boost inductor, is the minimum value of the input voltage, is the output power, is the switching frequency, is the output voltage; The capacitance value of the output capacitor is: , In the formula, is the capacitance value of the output capacitor, is the output voltage ripple, is the frequency of the input AC power.

6. A method for dynamically optimizing power adapter parameters for extending device life according to claim 5, characterized in that: The optimization of switching frequency and output filter design, and balancing switching loss and output filter size specifically include: According to the topological structure of the switching power supply, analyze the influence of switching frequency on switching loss; Energy loss is generated during the switching process of the switch tube, and the loss is proportional to the switching frequency; The electronic filter is composed of inductors and capacitors, and the set frequency signal is filtered by using the characteristics of inductors and capacitors presenting different impedances to signals of different frequencies; Obtain the parameter values ​​of inductors and capacitors in electronic filters based on the selected switching frequency and output voltage ripple requirements; The conduction loss of the switch tube is obtained by calculating the product of the square of the root mean square current of the switch tube and the on-resistance of the switch tube. The switching loss of the switch tube is obtained by calculating the product of the switching frequency and the sum of the turn-on and turn-off energies of the switch tube.

7. A method for dynamically optimizing power adapter parameters for extending device life according to claim 6, characterized in that: The introduction of the load line adjustment circuit to leave room for the dynamic ripple when the output current jumps and to reduce the peak value of the dynamic ripple peak specifically includes: Introducing an adjustable resistor at the output end, by changing the relationship between output current and output voltage, the output voltage is adjusted when the output current jumps, leaving room for dynamic ripple; Select the resistance range of the adjustable resistor based on the power level and output characteristics of the power adapter; Connect the adjustable resistor element to the output end of the power adapter, build a load line adjustment circuit, and conduct preliminary tests to verify the stability of the circuit and the suppression effect on dynamic ripple; Connect a ripple monitoring device to the output end of the power adapter to monitor the dynamic ripple of the output current when it changes in real time; Based on the monitoring results, a load line adjustment strategy is formulated. When the output current increases, the output voltage is reduced to reduce the rising edge of the dynamic ripple. When the output current decreases, the output voltage is raised to reduce the falling edge of the dynamic ripple. The microcontroller implements an automatic adjustment mechanism to adjust the load line in real time based on the change of output current, dynamically controlling the output voltage and ripple; Performing performance testing on the power adapter under at least one load condition to verify the load line adjustment circuit's suppression effect on dynamic ripple; Integrate proven and optimized load line regulation circuits into power adapters.

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