Power supply chip control method and device, equipment and storage medium

Abstract

The invention relates to the technical field of power supply chips, and provides a power supply chip control method, device and equipment and a storage medium, and the method comprises the steps: obtaining an input voltage signal of a power supply chip, carrying out the sampling and filtering of the input voltage signal, and obtaining a voltage signal average value, a voltage signal peak value and a voltage signal effective value; performing analog-to-digital conversion processing on the voltage signal average value through an analog-to-digital converter to generate a digital voltage average value, performing comparison operation on the digital voltage average value and the voltage signal peak value to obtain a voltage difference value, and generating a target output signal; and filtering the target output signal to obtain a filtered signal, and controlling the power supply chip according to the filtered signal. By performing filtering and analog-to-digital conversion on an input voltage signal of the power supply chip, a filtering signal is generated to control the power supply chip, so that the response speed and stability are improved, and the problems of low response speed and output voltage overshoot during high-frequency transient response or severe load change are solved.

Description

Technical Field

[0001] The present application relates to the technical field of power chips, and in particular to a power chip control method, device, equipment and storage medium. Background Art

[0002] With the rapid development and popularization of electronic devices, power chips are increasingly used in various electronic products. Modern power management systems not only require efficient and stable power supply capabilities, but also must have strong resistance to voltage fluctuations and interference to meet various complex application scenarios and users' higher demands for equipment performance. Therefore, how to effectively control the output of power chips to achieve optimal performance has become the focus of industry research and development.

[0003] Among the related technical means, the traditional voltage feedback control method mainly detects the output voltage and compares the detected voltage value with the preset reference voltage to generate an error signal. This error signal passes through several amplification and compensation circuits and is ultimately used to adjust the on-time of the switching power supply or the linear adjustment element to achieve voltage regulation control of the output voltage. Through this control method, the output voltage of the power chip can be effectively stabilized, thereby ensuring the normal operation of the load and avoiding equipment abnormalities or damage caused by voltage fluctuations.

[0004] For the above technical solution, the basic stability of the output voltage can be achieved through traditional voltage feedback control, but there are problems of slow response speed and output voltage overshoot in high-frequency transient response or drastic load changes. This is mainly because the analog voltage feedback path has limited response and cannot make timely adjustments to rapidly changing conditions, resulting in short-term instability of the output voltage, affecting the performance and safety of the equipment. Summary of the invention

[0005] In order to improve the problems of slow response speed and output voltage overshoot when responding to high-frequency transients or when the load changes drastically, the present application provides a power chip control method, device, equipment and storage medium, which can effectively improve the transient response speed and accuracy through digital signal processing and dynamic adjustment strategies, and provide more stable and reliable power output.

[0006] The present invention provides a power chip control method, the control method comprising: obtaining an input voltage signal of a power chip, sampling and filtering the input voltage signal to obtain a voltage signal average value, a voltage signal peak value and a voltage signal effective value; performing analog-to-digital conversion processing on the voltage signal average value through an analog-to-digital converter to generate a digital voltage average value, performing a comparison operation on the digital voltage average value and the voltage signal peak value to obtain a voltage difference value; performing pulse width modulation on the voltage difference using a pulse width modulation circuit to obtain an output pulse width signal and a reference sine signal, generating a pulse width drive signal based on the output pulse width signal, and performing a comparison operation on the pulse width drive signal and The reference sinusoidal signal is superimposed to obtain a superimposed signal, and a feedback signal is generated based on the superimposed signal; the superimposed signal is current detected according to the shunt resistor to obtain a current detection signal, the feedback signal is amplified by an error amplifier to obtain an error signal, the current detection signal and the error signal are fused to obtain a control signal; the control signal is amplified to obtain an amplified control signal, the effective value of the voltage signal is dynamically adjusted using the amplified control signal to obtain a target output signal; the target output signal is filtered to obtain a filtered signal, and the power chip is controlled according to the filtered signal.

[0007] As a preferred solution, the steps of acquiring the input voltage signal of the power chip, sampling and filtering the input voltage signal, and obtaining the voltage signal average value, the voltage signal peak value, and the voltage signal effective value include: collecting the input voltage signal of the power chip through a voltage sensor to obtain a continuous input voltage waveform signal; segmenting the input voltage waveform signal based on a Fourier transform algorithm to obtain a plurality of sampling point data; filtering each of the sampling point data using a Butterworth filter to obtain a plurality of filtered sampling point data; and weightedly accumulating all the filtered sampling point data in chronological order to obtain the voltage signal average value, the voltage signal peak value, and the voltage signal effective value.

[0008] As a preferred solution, the steps of performing analog-to-digital conversion processing on the average value of the voltage signal through an analog-to-digital converter to generate a digital voltage average value, and comparing the digital voltage average value with the voltage signal peak value to obtain a voltage difference value include: sampling and holding the voltage average value according to a sample-and-hold circuit to obtain a stable voltage value, performing piecewise approximation processing on the stable voltage value using a table lookup method to obtain a digital voltage approximation value and a precision compensation value; inputting the digital voltage approximation value and the precision compensation value into the analog-to-digital converter for mixed digital-analog correction to obtain a digital voltage average value; and performing real-time comparison of the digital voltage average value and the voltage signal peak value through a Hall effect comparator to generate a corresponding voltage difference value.

[0009] As a preferred solution, the steps of using a pulse width modulation circuit to perform pulse width modulation on the voltage difference to obtain an output pulse width signal and a reference sinusoidal signal, generating a pulse width drive signal based on the output pulse width signal, superimposing the pulse width drive signal and the reference sinusoidal signal to obtain a superimposed signal, and generating a feedback signal based on the superimposed signal include: inputting the voltage difference into a pulse width modulation circuit, performing real-time pulse width modulation processing on the voltage difference in the pulse width modulation circuit using a historical voltage difference as a modulation reference to generate an output pulse width signal; creating a reference sinusoidal signal matching the output pulse width signal by a sinusoidal wave generator, generating a pulse width drive signal based on the output pulse width signal by using an emitter follower, superimposing the pulse width drive signal with the reference sinusoidal signal in phase to generate a superimposed signal containing frequency and phase information; and gain-adjusting the superimposed signal by a differential amplifier, and using the adjusted superimposed signal as a feedback signal.

[0010] As a preferred scheme, the steps of performing current detection on the superimposed signal according to the shunt resistor to obtain a current detection signal, amplifying the feedback signal through the error amplifier to obtain an error signal, and fusing the current detection signal and the error signal to obtain a control signal include: performing current detection on the superimposed signal using the shunt resistor, and generating a current detection signal based on the detection result; inputting the current detection signal and the feedback signal into a phase-locked amplifier for synchronous phase-locked amplification, and outputting an error signal; and weightedly fusing the error signal and the current detection signal using a proportional-integral-differential control algorithm to obtain a control signal.

[0011] As a preferred solution, the step of amplifying the control signal to obtain an amplified control signal, and dynamically adjusting the effective value of the voltage signal using the amplified control signal to obtain a target output signal includes: using a differential amplifier to perform differential amplification and noise suppression on the control signal to obtain a primary amplified signal and a stable bias signal, and performing linear amplification and compensation correction on the primary amplified signal through an operational amplifier to obtain a corrected amplified signal; inputting the corrected amplified signal and the stable bias signal into a preset proportional-integral regulator to obtain an adjusted amplified control signal; performing real-time phase comparison and dynamic adjustment on the amplified control signal and the effective value of the voltage signal through a phase-locked loop circuit to obtain a real-time error signal and a transient response signal; smoothing the real-time error signal according to an adaptive filtering algorithm to obtain a smoothed voltage compensation value and a stable output signal, and performing power conversion and regulation on the smoothed voltage compensation value and the transient response signal through a power electronic converter to obtain an optimized control current vector; and performing cross-coupling feedback and error correction on the optimized control current vector and the stable output signal using a high-precision integrated current sensor to obtain a target output signal.

[0012] As a preferred scheme, the step of filtering the target output signal to obtain a filtered signal, and controlling the power chip according to the filtered signal includes: using an active low-pass filter to low-pass filter the target output signal to obtain a filtered signal; transmitting the filtered signal to a preset control module, and feedback-adjusting the input voltage of the power chip based on the filtered signal to achieve control of the power chip. The present application also provides a power chip control device, including: an acquisition module, used to acquire an input voltage signal of a power chip, sample and filter the input voltage signal to obtain a voltage signal average value, a voltage signal peak value and a voltage signal effective value; a comparison module, used to perform analog-to-digital conversion on the voltage signal average value through an analog-to-digital converter to generate a digital voltage average value, compare the digital voltage average value with the voltage signal peak value to obtain a voltage difference value; a modulation module, used to perform pulse width modulation on the voltage difference using a pulse width modulation circuit to obtain an output pulse width signal and a reference sine signal, generate a pulse width drive signal based on the output pulse width signal, and compare the pulse width drive signal with the voltage signal peak value to obtain a voltage difference value; A superposition operation is performed on a reference sinusoidal signal to obtain a superposition signal, and a feedback signal is generated based on the superposition signal; an amplification module is used to perform current detection on the superposition signal according to a shunt resistor to obtain a current detection signal, amplify the feedback signal through an error amplifier to obtain an error signal, and fuse the current detection signal and the error signal to obtain a control signal; an adjustment module is used to amplify the control signal to obtain an amplified control signal, and dynamically adjust the effective value of the voltage signal using the amplified control signal to obtain a target output signal; a control module is used to filter the target output signal to obtain a filtered signal, and control the power chip according to the filtered signal.

[0013] The present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor implements the power chip control method described above when executing the computer program.

[0014] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the processor executes the power chip control method as described above.

[0015] Compared with the prior art, the present application has the following beneficial effects: good stability and fast response speed. By sampling, filtering and analog-to-digital conversion of the input voltage signal of the power chip, the voltage average value, peak value and effective value are generated, and compared with the peak value of the voltage signal, the voltage difference is obtained, and pulse width modulation is used to achieve dynamic adjustment, generate feedback signals and control signals, and then adjust the effective value of the voltage signal, and finally improve the response speed and stability of the power chip, ensure that stable and reliable power output is provided under high-frequency transient response and load changes, improve the response speed and stability of the system, provide more stable and reliable power output, and improve the problems of slow response speed and output voltage overshoot when high-frequency transient response or drastic load changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0018] Figure 1 is a flow chart of a power chip control method provided by an embodiment of the present invention; Figure 2 is a schematic block diagram of the structure of a power chip control device provided by an embodiment of the present invention; Figure 3 It is a schematic block diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0019] Description of reference numerals: 10. Power chip control device; 11. Acquisition module; 12. Comparison module; 13. Modulation module; 14. Amplification module; 15. Adjustment module; 16. Control module; 20. Electronic device; 21. Memory; 22. Processor. DETAILED DESCRIPTION

[0020] 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 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.

[0021] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0022] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0023] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0024] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0025] Embodiment 1: like Figure 1 As shown, a power chip control method provided in an embodiment of the present application includes steps S100 to S600.

[0026] Step S100: acquiring an input voltage signal of a power chip, sampling and filtering the input voltage signal to obtain an average value of the voltage signal, a peak value of the voltage signal, and an effective value of the voltage signal.

[0027] In this step, when acquiring the input voltage signal, a high-precision sensor is used to sample the input voltage signal in real time to ensure the accuracy of the voltage signal. Specifically, the sampled input voltage signal is low-pass filtered to eliminate high-frequency noise interference and obtain the voltage signal average value, voltage signal peak value and voltage signal effective value.

[0028] For example, the input voltage signal sampling frequency is set to 100kHz to meet the requirements of most power management systems.

[0029] Step S200: performing analog-to-digital conversion processing on the average value of the voltage signal through an analog-to-digital converter to generate a digital voltage average value, and performing a comparison operation on the digital voltage average value and the peak value of the voltage signal to obtain a voltage difference value.

[0030] In this step, a high-precision analog-to-digital converter (ADC) is selected to convert the average value of the voltage signal to ensure the accuracy of the digital voltage average value. Specifically, the resolution of the analog-to-digital converter is set to 12 bits to capture subtle changes in the voltage signal. The generated digital voltage average value is quickly compared with the peak value of the voltage signal to obtain the voltage difference.

[0031] For example, using a 12-bit ADC, accurate digitization of the average value of a voltage signal can be achieved.

[0032] Step S300, use a pulse width modulation circuit to perform pulse width modulation on the voltage difference to obtain an output pulse width signal and a reference sinusoidal signal, generate a pulse width drive signal based on the output pulse width signal, perform a superposition operation on the pulse width drive signal and the reference sinusoidal signal to obtain a superposition signal, and generate a feedback signal based on the superposition signal.

[0033] In this step, a high-speed pulse width modulation circuit (PWM) is selected to process the voltage difference to ensure the accuracy and stability of the output signal. Specifically, the reference sinusoidal signal uses a sine wave with a frequency of 1kHz to ensure that the modulated output pulse width signal has good tracking performance. The superposition signal of the pulse width drive signal and the reference sinusoidal signal is used to generate a feedback signal for subsequent control links.

[0034] For example, using a high-speed PWM chip can achieve high-frequency pulse width modulation processing.

[0035] Step S400, performing current detection on the superimposed signal according to the shunt resistor to obtain a current detection signal, amplifying the feedback signal through the error amplifier to obtain an error signal, and fusing the current detection signal and the error signal to obtain a control signal.

[0036] In this step, current detection is performed through a shunt resistor, and the changes in the superimposed signal are monitored in real time. Specifically, a shunt resistor with an accuracy of 0.1% is selected to improve the accuracy of current detection. The feedback signal is amplified by an error amplifier to obtain an error signal. The current detection signal and the error signal are fused to obtain an accurate signal for control.

[0037] For example, using an error amplifier with a gain of 100 can significantly improve the amplification effect of the feedback signal.

[0038] Step S500: amplify the control signal to obtain an amplified control signal, and dynamically adjust the effective value of the voltage signal using the amplified control signal to obtain a target output signal.

[0039] In this step, a high-gain amplifier is selected to amplify the control signal to ensure the strength and stability of the amplified control signal. Specifically, the gain of the amplifier is set to 20 dB to achieve accurate adjustment of the effective value of the voltage signal to obtain the target output signal.

[0040] For example, by using an amplifier with adjustable gain, the amplification factor can be adjusted according to needs, thereby improving the flexibility of adjustment.

[0041] Step S600: filter the target output signal to obtain a filtered signal, and control the power chip according to the filtered signal.

[0042] In this step, a low-pass filter is used to filter the target output signal to remove high-frequency noise and obtain a smooth filtered signal. Specifically, the cutoff frequency of the filter is set to 10kHz to ensure the stability and purity of the filtered signal. The power chip is precisely controlled according to the filtered signal to achieve stable regulation of the output voltage.

[0043] For example, by using a low-pass filter with an adjustable cutoff frequency, the filtering effect can be adjusted according to actual needs.

[0044] In this embodiment, the input voltage signal is obtained, and the input voltage signal is sampled and filtered to obtain the voltage signal average value, the voltage signal peak value and the voltage signal effective value. Then, the voltage signal average value is converted by an analog-to-digital converter to generate a digital voltage average value, and the digital voltage average value is compared with the voltage signal peak value to obtain a voltage difference. Subsequently, the voltage difference is pulse-width modulated by a pulse width modulation circuit to obtain an output pulse width signal and a reference sinusoidal signal, and a pulse width drive signal is generated based on the output pulse width signal, and the pulse width drive signal is superimposed with the reference sinusoidal signal to obtain a superimposed signal, and a feedback signal is generated based on the superimposed signal. Then, the superimposed signal is current-detected according to the shunt resistor to obtain a current detection signal, and the feedback signal is amplified by the error amplifier to generate an error signal, and the current detection signal and the error signal are fused to obtain a control signal. Finally, the control signal is amplified to obtain an amplified control signal, and the amplified control signal is used to dynamically adjust the effective value of the voltage signal to obtain a target output signal; finally, the target output signal is filtered to obtain a filtered signal, and the power chip is controlled based on the filtered signal.

[0045] Through the control method of this embodiment, the response speed and stability of the system can be significantly improved when processing the input voltage signal. Through digital signal processing and dynamic adjustment strategies, the output voltage of the power chip can be kept stable in the case of high-frequency transient response and drastic load changes, avoiding equipment performance and safety issues caused by slow response speed and output voltage overshoot, thereby providing a more stable and reliable power output for various application scenarios and improving the problems of slow response speed and output voltage overshoot in high-frequency transient response or drastic load changes.

[0046] Embodiment 2: In step S100, an input voltage signal of a power chip is collected by a voltage sensor to obtain a continuous input voltage waveform signal.

[0047] The input voltage signal of the power chip is collected in real time through a high-precision voltage sensor to ensure that the input voltage waveform signal obtained has high accuracy and integrity. Specifically, the sampling frequency of the voltage sensor is set to 200kHz to ensure accurate capture of the voltage waveform.

[0048] For example, a high-precision ADC of model ADS1115 is used for sampling to ensure the accuracy of the input voltage waveform signal.

[0049] The input voltage waveform signal is processed segmentally based on the Fourier transform algorithm to obtain a number of sampling point data.

[0050] By performing Fourier transform on the input voltage waveform signal, it can be decomposed into different frequency components. Specifically, the continuous input voltage waveform signal is segmented into time windows of 1 ms each, and spectrum analysis is performed to obtain the sampling point data in each time period.

[0051] For example, the fft function in MATLAB is used to perform Fourier transform on the input voltage waveform signal to obtain the amplitude and phase of each frequency component.

[0052] The Butterworth filter is used to perform filtering operation on each sampling point data to obtain a number of filtered sampling point data.

[0053] By designing a second-order Butterworth filter, each sampling point data can be low-pass filtered to remove high-frequency noise and obtain a smooth voltage signal. Specifically, the cutoff frequency of the filter is set to 10kHz to ensure that the filtered signal is smooth.

[0054] For example, use the ButterworthFilter module in Simulink to filter the sampling point data.

[0055] All filtered sampling point data are weightedly accumulated in chronological order to obtain the voltage signal average value, voltage signal peak value and voltage signal effective value.

[0056] By weighted accumulation of the filtered sampling point data, the statistical characteristic value of the input voltage signal can be obtained. Specifically, each sampling point data is weighted according to the time weighting function, and the final voltage signal average value, peak value and effective value are accumulated.

[0057] For example, the numpy library in the Python programming language is used to perform weighted accumulation on the sampling point data.

[0058] In step S200, the voltage average value is sampled and held according to the sampling and holding circuit to obtain a stable voltage value, and the stable voltage value is segmented and approximated by a table lookup method to obtain a digital voltage approximation value and an accuracy compensation value.

[0059] The voltage average value is sampled and held in real time by a high-stability sample-and-hold circuit to ensure that the obtained voltage value is stable and unchanged. Specifically, a sample-and-hold circuit of model LF398 is used to ensure the accurate holding of the voltage average value.

[0060] For example, the LF398 sample-and-hold circuit is used to complete the sampling and holding of the voltage average value within 1 ms.

[0061] The digital voltage approximation value and the accuracy compensation value are input into the analog-to-digital converter for digital-analog mixed correction to obtain the digital voltage average value.

[0062] By inputting the digital voltage approximation value and the accuracy compensation value into a high-precision analog-to-digital converter, a mixed digital-analog correction of the voltage average value can be achieved to ensure the high accuracy of the digital voltage average value. Specifically, the resolution of the analog-to-digital converter is set to 16 bits to obtain an accurate digital voltage average value.

[0063] For example, a 16-bit analog-to-digital converter of model AD7606 is used to perform mixed digital-analog correction.

[0064] The Hall effect comparator is used to compare the digital voltage average value and the voltage signal peak value in real time to generate the corresponding voltage difference.

[0065] The Hall effect comparator can realize real-time comparison of the high-precision voltage average and peak values ​​to obtain the voltage difference. Specifically, the response time of the comparator is set to 10ns to ensure the real-time nature of the voltage difference.

[0066] For example, a high-speed Hall effect comparator such as the HMC761 is used for real-time comparison.

[0067] In step S300, the voltage difference is input into a pulse width modulation circuit, and the pulse width modulation circuit uses the historical voltage difference as a modulation reference to perform real-time pulse width modulation processing on the voltage difference to generate an output pulse width signal.

[0068] The voltage difference is modulated in real time by a high-speed pulse width modulation circuit to generate a corresponding output pulse width signal. Specifically, the modulation frequency of the pulse width modulation circuit is set to 100kHz to achieve the requirement of high-frequency modulation.

[0069] For example, a pulse width modulation controller of type TL494 is used to perform real-time modulation of the voltage difference.

[0070] A reference sine wave generator is used to create a reference sine signal that matches the output pulse width signal. An emitter follower is used to generate a pulse width drive signal based on the output pulse width signal. The pulse width drive signal is phase-superimposed with the reference sine signal to generate a superimposed signal containing frequency and phase information.

[0071] Through the sine wave generator and the emitter follower, accurate matching and driving of the output pulse width signal can be achieved. Specifically, the output frequency of the sine wave generator is set to 1kHz to ensure the accuracy of the reference sine signal.

[0072] For example, a sine wave generator of model XR2206 and an emitter follower of model BC547 are used for signal matching and driving.

[0073] The superimposed signal is gain-adjusted by a differential amplifier, and the adjusted superimposed signal is used as a feedback signal. The superimposed signal can be accurately gain-adjusted by a high-precision differential amplifier to ensure the stability of the feedback signal. Specifically, the gain of the differential amplifier is set to 20 dB to obtain the required feedback signal.

[0074] For example, a differential amplifier of type INA128 is used to perform signal gain adjustment.

[0075] In step S400, a shunt resistor is used to perform current detection on the superimposed signal, and a current detection signal is generated based on the detection result.

[0076] The superimposed signal is subjected to current detection by a high-precision shunt resistor to obtain a current detection signal. Specifically, a shunt resistor with a resistance value of 0.01Ω is selected to improve the accuracy of current detection.

[0077] For example, a high-precision shunt resistor is used for current sensing in RS-485.

[0078] The current detection signal and the feedback signal are input into the phase-locked amplifier for synchronous phase-locked amplification, and an error signal is output.

[0079] The phase-locked amplifier can realize synchronous amplification processing of the current detection signal and the feedback signal to obtain a high-precision error signal. Specifically, the phase-locked frequency of the phase-locked amplifier is set to 10kHz to ensure the synchronous amplification effect.

[0080] For example, a lock-in amplifier model SR830 is used to perform synchronous signal amplification.

[0081] The proportional-integral-differential control algorithm is used to perform weighted fusion of the error signal and the current detection signal to obtain the control signal.

[0082] Through the PID control algorithm, the error signal and the current detection signal can be weighted to generate a high-precision control signal. Specifically, the PID control parameters are set to Kp=1.0, Ki=0.1, Kd=0.01 to obtain an ideal control effect.

[0083] For example, use the PIDController module in Simulink to perform weighted fusion of signals.

[0084] In step S500, a differential amplifier is used to perform differential amplification and noise suppression processing on the control signal to obtain a primary amplified signal and a stable bias signal, and an operational amplifier is used to perform linear amplification and compensation correction on the primary amplified signal to obtain a corrected amplified signal.

[0085] The control signal is differentially amplified and noise suppressed by a high-precision differential amplifier to obtain a primary amplified signal and a stable bias signal. Specifically, the noise suppression ratio of the differential amplifier is set to 60 dB to ensure the purity of the signal.

[0086] For example, a high-precision differential amplifier model AD8421 is used for signal amplification and noise suppression.

[0087] The corrected amplified signal and the stable bias signal are input into a preset proportional-integral regulator to obtain an adjusted amplified control signal.

[0088] The corrected amplified signal can be further precisely adjusted by the preset proportional-integral regulator to obtain a stable amplified control signal. Specifically, the gain of the proportional-integral regulator is set to 30 dB to obtain an ideal adjustment effect.

[0089] For example, an operational amplifier of model LM358 is used for signal amplification and correction.

[0090] The phase of the amplified control signal and the effective value of the voltage signal is compared and dynamically adjusted in real time through a phase-locked loop circuit to obtain a real-time error signal and a transient response signal.

[0091] Through the phase-locked loop circuit, accurate phase comparison and adjustment of the amplified control signal and the effective value of the voltage signal can be achieved. Specifically, the operating frequency of the phase-locked loop is set to 20kHz to ensure the real-time performance of the phase comparison.

[0092] For example, a phase-locked loop circuit of type LM565 is used for phase comparison and adjustment.

[0093] The real-time error signal is smoothed according to the adaptive filtering algorithm to obtain a smooth voltage compensation value and a stable output signal. The smooth voltage compensation value and the transient response signal are converted and regulated by a power electronic converter to obtain an optimized control current vector.

[0094] The adaptive filtering algorithm can effectively remove noise, obtain a smooth voltage compensation signal, and realize efficient power conversion through the power electronic converter. Specifically, the window length of the adaptive filtering algorithm is set to 100ms to ensure the smoothness of the signal.

[0095] For example, a power electronic converter model APFC-300 is used to convert and regulate the signal.

[0096] A high-precision integrated current sensor is used to perform cross-coupling feedback and error correction on the optimized control current vector and the stable output signal to obtain the target output signal.

[0097] The high-precision integrated current sensor can achieve accurate measurement and feedback of the control current vector and output signal. Specifically, the accuracy of the integrated current sensor is set to 0.01% to ensure the accuracy of signal measurement.

[0098] For example, a high-precision integrated current sensor model LEM-200 is used for signal measurement and feedback.

[0099] In step S600, an active low-pass filter is used to perform low-pass filtering on the target output signal to obtain a filtered signal.

[0100] The target output signal is filtered by an active low-pass filter to remove high-frequency noise and obtain a smooth filtered signal. Specifically, the cutoff frequency of the active low-pass filter is set to 10kHz to ensure the purity of the filtered signal.

[0101] For example, an active low-pass filter of type MAX7401 is used to filter the signal.

[0102] The filtered signal is transmitted to the preset control module, and the input voltage of the power chip is feedback-regulated based on the filtered signal to achieve control of the power chip. Through the preset control module, accurate feedback regulation of the filtered signal can be achieved to ensure the stability of the input voltage of the power chip. Specifically, the feedback gain of the control module is set to 15dB to ensure stable voltage control.

[0103] For example, a control module model UC3854 is used for signal feedback regulation.

[0104] In this embodiment, the input voltage signal of the power chip is collected by a voltage sensor, and the input voltage waveform signal is processed in sections based on the Fourier transform algorithm, and the sampling point data is filtered by a Butterworth filter, and the filtered sampling point data is weighted and accumulated in time order to obtain the voltage signal average value, the voltage signal peak value and the voltage signal effective value. Then, the voltage average value is sampled and held by a sampling and holding circuit, and the table lookup method is used for segmented approximation processing, and the digital voltage approximation value and the precision compensation value are input into the analog-to-digital converter for digital-analog mixed correction to obtain the digital voltage average value. Then, the digital voltage average value and the voltage signal peak value are compared in real time by a Hall effect comparator to generate a voltage difference, and the voltage difference is input into a pulse width modulation circuit for real-time modulation, and a pulse width drive signal is generated by a sine wave generator and an emitter follower, and the pulse width drive signal is superimposed with the reference sine signal to generate a superimposed signal. Then, the superimposed signal is gain-adjusted by a differential amplifier as a feedback signal. The superimposed signal is detected by current detection using a shunt resistor, the current detection signal and the feedback signal are synchronously phase-locked and amplified by a phase-locked amplifier, the error signal and the current detection signal are weighted and fused using a PID control algorithm to obtain a control signal, and differential amplification and noise suppression are performed through a differential amplifier and an operational amplifier, and finally real-time phase comparison and dynamic adjustment are performed through a phase-locked loop circuit, and power conversion and regulation are performed based on an adaptive filtering algorithm and a power electronic converter to obtain a target output signal. Finally, the target output signal is filtered and processed by an active low-pass filter, and transmitted to a control module for feedback adjustment to achieve precise control of the power chip. Through the above steps, this embodiment achieves efficient and stable control of the power chip, especially in the case of high-frequency transient response and drastic load changes, significantly improving the response speed and stability of the system, and providing a more stable and reliable power output.

[0105] Embodiment 3: like Figure 2 As shown, the present application also provides a power chip control device 10 , including an acquisition module 11 , a comparison module 12 , a modulation module 13 , an amplification module 14 , a regulation module 15 and a control module 16 .

[0106] The acquisition module 11 is mainly used to acquire the input voltage signal of the power chip, sample and filter the input voltage signal, and obtain the voltage signal average value, voltage signal peak value and voltage signal effective value.

[0107] The comparison module 12 is mainly used to perform analog-to-digital conversion processing on the average value of the voltage signal through an analog-to-digital converter to generate a digital voltage average value, and compare the digital voltage average value with the peak value of the voltage signal to obtain a voltage difference.

[0108] The modulation module 13 is mainly used to perform pulse width modulation on the voltage difference using a pulse width modulation circuit to obtain an output pulse width signal and a reference sinusoidal signal, generate a pulse width drive signal based on the output pulse width signal, perform a superposition operation on the pulse width drive signal and the reference sinusoidal signal to obtain a superposition signal, and generate a feedback signal based on the superposition signal.

[0109] The amplification module 14 is mainly used to perform current detection on the superimposed signal according to the shunt resistor to obtain a current detection signal, amplify the feedback signal through the error amplifier to obtain an error signal, and fuse the current detection signal and the error signal to obtain a control signal.

[0110] The regulating module 15 is mainly used to amplify the control signal to obtain an amplified control signal, and dynamically adjust the effective value of the voltage signal using the amplified control signal to obtain a target output signal.

[0111] The control module 16 is mainly used to filter the target output signal to obtain a filtered signal, and control the power chip according to the filtered signal.

[0112] In this embodiment, the input voltage signal of the power chip is collected by the acquisition module 11, and the input voltage signal is sampled and filtered to obtain the voltage signal average value, voltage signal peak value and voltage signal effective value. The comparison module 12 performs analog-to-digital conversion on the voltage signal average value through an analog-to-digital converter to generate a digital voltage average value, and compares it with the voltage signal peak value to obtain a voltage difference. The modulation module 13 performs pulse width modulation on the voltage difference using a pulse width modulation circuit to generate an output pulse width signal and a reference sinusoidal signal, and generates a pulse width drive signal based on the output pulse width signal. The amplification module 14 performs current detection on the superimposed signal according to the shunt resistor to obtain a current detection signal, and amplifies the feedback signal through the error amplifier to generate an error signal, and then fuses the current detection signal and the error signal to obtain a control signal. The adjustment module 15 amplifies the control signal to generate an amplified control signal, and uses the signal to dynamically adjust the effective value of the voltage signal to obtain a target output signal. The control module 16 performs filtering on the target output signal to generate a filtered signal, and accurately controls the power chip according to the signal.

[0113] It should be noted that technicians in the relevant technical field can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described device and each module can refer to the corresponding process in a power chip control method in the aforementioned embodiment 1, and will not be repeated here.

[0114] Embodiment 4: like Figure 3 As shown, the present application also provides an electronic device 20, including a memory 21 and a processor 22, the memory 21 stores a computer program that can be run on the processor 22, and the processor 22 implements the power chip control method of Example 1 when executing the computer program.

[0115] In this embodiment, the processor 22 executes the computer program stored in the memory 21 to achieve accurate control of the power chip. The computer program includes the steps of obtaining the input voltage signal of the power chip, performing sampling and filtering, analog-to-digital conversion, pulse width modulation, current detection, error amplification and feedback control. Through these steps, the computer program can accurately control the output voltage of the power chip, effectively improve the response speed and stability of the system, and thus ensure the normal operation of the electronic device 20.

[0116] Embodiment 5: The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the processor executes the power chip control method as described in Example 1.

[0117] In this embodiment, the processor can execute various steps of the power chip control method through the computer program stored on the computer readable storage medium. The computer program includes the steps of obtaining the input voltage signal, sampling and filtering processing, analog-to-digital conversion, pulse width modulation, current detection, error amplification and feedback control. By executing these steps, the computer program can realize the precise control of the power chip, improve the working efficiency and stability of the power chip, and ensure the stable operation of the device under different working conditions.

[0118] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power chip control method, characterized in that: The control method comprises: Acquire an input voltage signal of a power chip, sample and filter the input voltage signal, and obtain an average value of the voltage signal, a peak value of the voltage signal, and an effective value of the voltage signal; Performing analog-to-digital conversion on the average value of the voltage signal by an analog-to-digital converter to generate a digital voltage average value, and performing a comparison operation on the digital voltage average value and the peak value of the voltage signal to obtain a voltage difference value; Performing pulse width modulation on the voltage difference by using a pulse width modulation circuit to obtain an output pulse width signal and a reference sinusoidal signal, generating a pulse width drive signal based on the output pulse width signal, performing a superposition operation on the pulse width drive signal and the reference sinusoidal signal to obtain a superposition signal, and generating a feedback signal based on the superposition signal; Performing current detection on the superimposed signal according to the shunt resistor to obtain a current detection signal, amplifying the feedback signal through an error amplifier to obtain an error signal, and fusing the current detection signal and the error signal to obtain a control signal; amplifying the control signal to obtain an amplified control signal, and dynamically adjusting the effective value of the voltage signal using the amplified control signal to obtain a target output signal; The target output signal is filtered to obtain a filtered signal, and the power chip is controlled according to the filtered signal.

2. The power chip control method according to claim 1, characterized in that: The step of acquiring the input voltage signal of the power chip, sampling and filtering the input voltage signal, and obtaining the average value of the voltage signal, the peak value of the voltage signal, and the effective value of the voltage signal includes: The input voltage signal of the power chip is collected by the voltage sensor to obtain a continuous input voltage waveform signal; Based on the Fourier transform algorithm, the input voltage waveform signal is processed in sections to obtain a plurality of sampling point data; Using a Butterworth filter to perform filtering operation on each of the sampling point data to obtain a plurality of filtered sampling point data; All the filtered sampling point data are weightedly accumulated in time sequence to obtain the voltage signal average value, voltage signal peak value and voltage signal effective value.

3. The power chip control method according to claim 1, characterized in that: The step of performing analog-to-digital conversion processing on the average value of the voltage signal by an analog-to-digital converter to generate a digital voltage average value, and performing a comparison operation on the digital voltage average value and the peak value of the voltage signal to obtain a voltage difference value comprises: The voltage average value is sampled and held according to a sample-and-hold circuit to obtain a stable voltage value, and the stable voltage value is subjected to segmented approximation processing by a table lookup method to obtain a digital voltage approximation value and an accuracy compensation value; Inputting the digital voltage approximation value and the accuracy compensation value into an analog-to-digital converter for digital-to-analog mixed correction to obtain a digital voltage average value; The digital voltage average value and the voltage signal peak value are compared in real time by a Hall effect comparator to generate a corresponding voltage difference value.

4. The power chip control method according to claim 1, characterized in that: The steps of using a pulse width modulation circuit to perform pulse width modulation on the voltage difference to obtain an output pulse width signal and a reference sinusoidal signal, generating a pulse width drive signal based on the output pulse width signal, performing a superposition operation on the pulse width drive signal and the reference sinusoidal signal to obtain a superposition signal, and generating a feedback signal based on the superposition signal include: The voltage difference is input into a pulse width modulation circuit, and the pulse width modulation circuit uses the historical voltage difference as a modulation reference to perform real-time pulse width modulation processing on the voltage difference to generate an output pulse width signal; A reference sinusoidal signal matching the output pulse width signal is created by a sinusoidal wave generator, a pulse width drive signal is generated based on the output pulse width signal by an emitter follower, and the pulse width drive signal is phase-superimposed with the reference sinusoidal signal to generate a superimposed signal containing frequency and phase information; The superimposed signal is gain-adjusted by a differential amplifier, and the adjusted superimposed signal is used as a feedback signal.

5. The power chip control method according to claim 1, characterized in that: The steps of performing current detection on the superimposed signal according to the shunt resistor to obtain a current detection signal, amplifying the feedback signal through an error amplifier to obtain an error signal, and fusing the current detection signal and the error signal to obtain a control signal include: Performing current detection on the superimposed signal using a shunt resistor, and generating a current detection signal based on the detection result; Inputting the current detection signal and the feedback signal into a phase-locked amplifier for synchronous phase-locked amplification, and outputting an error signal; The error signal and the current detection signal are weightedly fused using a proportional-integral-differential control algorithm to obtain a control signal.

6. The power chip control method according to claim 1, characterized in that: The step of amplifying the control signal to obtain an amplified control signal, and dynamically adjusting the effective value of the voltage signal using the amplified control signal to obtain a target output signal comprises: Using a differential amplifier to perform differential amplification and noise suppression processing on the control signal to obtain a primary amplified signal and a stable bias signal, and using an operational amplifier to perform linear amplification and compensation correction on the primary amplified signal to obtain a corrected amplified signal; Inputting the correction amplified signal and the stable bias signal into a preset proportional-integral regulator to obtain an adjusted amplified control signal; The amplified control signal and the effective value of the voltage signal are compared and dynamically adjusted in real time in phase through a phase-locked loop circuit to obtain a real-time error signal and a transient response signal; Smoothing the real-time error signal according to an adaptive filtering algorithm to obtain a smoothed voltage compensation value and a stable output signal, and performing power conversion and regulation on the smoothed voltage compensation value and the transient response signal through a power electronic converter to obtain an optimized control current vector; A high-precision integrated current sensor is used to perform cross-coupling feedback and error correction on the optimized control current vector and the stable output signal to obtain a target output signal.

7. The power chip control method according to claim 1, characterized in that: The step of filtering the target output signal to obtain a filtered signal, and controlling the power chip according to the filtered signal comprises: Using an active low-pass filter to perform low-pass filtering on the target output signal to obtain a filtered signal; The filtered signal is transmitted to a preset control module, and the input voltage of the power chip is feedback-regulated based on the filtered signal to achieve control of the power chip.

8. A power chip control device, characterized in that: include: An acquisition module is used to acquire an input voltage signal of a power chip, sample and filter the input voltage signal, and obtain an average value of the voltage signal, a peak value of the voltage signal, and an effective value of the voltage signal; A comparison module, configured to perform analog-to-digital conversion on the average value of the voltage signal through an analog-to-digital converter to generate a digital voltage average value, and compare the digital voltage average value with the peak value of the voltage signal to obtain a voltage difference value; A modulation module, configured to perform pulse width modulation on the voltage difference using a pulse width modulation circuit to obtain an output pulse width signal and a reference sinusoidal signal, generate a pulse width drive signal based on the output pulse width signal, perform a superposition operation on the pulse width drive signal and the reference sinusoidal signal to obtain a superposition signal, and generate a feedback signal based on the superposition signal; an amplification module, configured to perform current detection on the superimposed signal according to a shunt resistor to obtain a current detection signal, amplify the feedback signal through an error amplifier to obtain an error signal, and fuse the current detection signal and the error signal to obtain a control signal; an adjusting module, configured to amplify the control signal to obtain an amplified control signal, and dynamically adjust the effective value of the voltage signal using the amplified control signal to obtain a target output signal; The control module is used to filter the target output signal to obtain a filtered signal, and control the power chip according to the filtered signal.

9. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor implements the power chip control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, the processor is enabled to execute the power chip control method as claimed in any one of claims 1 to 7.

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