2159 results about "Pulse width modulated" patented technology

Disclosed in the present invention are a grid-connect control method and apparatus for a grid-connect inverter. The method comprises: on the basis of a control structure of a grid-connect inverter in a dp domain, passing a deviation signal of a power outer loop through power outer loop controllers, so as to generate reference values of a current inner loop, and comparing the reference values of the current inner loop with an actual output current, so as to obtain error signals, wherein the control structure comprises a PQ power control outer loop and a current control inner loop, and the actual output current is obtained by means of performing phase tracking, on the basis of a synchronous reference frame phase-locked loop, on the voltage of a point of common coupling; and adjusting the error signals by means of a current inner loop controller, so as to generate modulation signals, performing pulse width modulation (PWM) on the modulation signals, so as to generate an on-off signal of an inverter bridge power semiconductor device, and controlling the state of connection and disconnection between the grid-connect inverter and a power grid on the basis of the on-off signal. In the present embodiment, the connection and disconnection between a grid-connect inverter and a power grid are controlled, so as to improve the stability of the grid-connect inverter in weak power grids.

A tracking and adaptive compensation method for power fluctuation of a pulse load of a ship is provided. The method includes: based on a microgrid topology model of the ship, a pulse load model of the pulse load, and an interharmonic power and pulse parameter relationship model, performing power fluctuation tracking, frequency selection and a power spectrum analysis to obtain filtering parameters of a low-pass filter and filtering parameters of a band-pass filter; performing waveform adaptation to eliminate a phase delay caused by the low-pass filter and the band-pass filter, and obtaining a control command for a power compensation strategy; and generating, by a power loop, a pulse width modulation (PWM) signal to control a switching tube in a bidirectional direct current (DC) / DC converter of each of an energy storage battery pack and a supercapacitor of a hybrid energy storage system.

The invention relates to the technical field of motor control, and discloses a hybrid excitation synchronous motor control strategy optimization method and device. The method comprises the following steps: performing mathematical modeling on permanent magnet flux linkage, exciting current and rotor parameters of the hybrid excitation synchronous motor to obtain a state observer equation; collecting current parameters and position parameters, and performing filtering processing to obtain motor operation state parameters; inputting a five-layer deep neural network for current and rotating speed parameter prediction to obtain an optimal current parameter and an optimal rotating speed prediction parameter; constructing a multi-objective function, and solving to obtain a current reference value; inputting the current reference value into a cascade PI controller, and performing voltage regulation through feedforward decoupling control and a space vector pulse width modulation technology to obtain a control voltage signal; and performing performance calculation control parameter optimization on the control voltage signal to obtain a target control parameter, thereby improving the control precision of the hybrid excitation synchronous motor.

The invention provides an intelligent harmonic dynamic compensation method and system for a data center. According to the method, server heat source surface temperature field distribution is monitored in real time through a distributed optical fiber temperature measurement array, and a dynamic impedance spectrum is generated; when the temperature gradient exceeds the flash evaporation critical value of the fluorinated cooling liquid, an active filter is activated to carry out dynamic impedance matching compensation on high-frequency harmonic current in the liquid cooling tank cabinet, and a pulse width modulation control signal of a circulating pump is generated; the compensation power of the filter and the turbulence intensity of the cooling liquid are synchronously adjusted by analyzing the coupling relation between the flowing vortex intensity of the cooling liquid and the dielectric polarization loss; when phase mismatch of a temperature field is caused by heat dissipation of multiple heat sources, a multi-band compensation strategy is reconstructed by utilizing frequency domain characteristics of a pulse width modulation signal and a compensation power historical value, and a cooling liquid branch flow distribution ratio and a filter frequency response curve are cooperatively adjusted. According to the technical scheme, the thermal stability and the electrical safety of the data center cooling machine room are improved.

A method of balancing voltages on flying capacitors in a multilevel power converter is provided (along with an associated controller). The power converter includes one or more flying capacitors. Pairs of switches in the power converter are controlled by pulse width modulated (PWM) control signals. The different pairs of switches are controlled by PWM control signals having a phase / timing shift between them. To balance the voltage on the one or more flying capacitors, one set of pulses can be widened or narrowed while another set is widened or narrowed. To change their widths, one edge of each pulse is modulated, while the other edge is unchanged. More specifically, the leading edge of one set of pulses is modulated, while the trailing edge of the other set of pulses is modulated.

Some examples relate to a circuit including a plurality of input pins, a plurality of output pins, a pulse width modulated (PWM) controller, and an inductor-open detection circuit. The PWM controller has a plurality of inputs and a plurality of outputs. The plurality of inputs of the PWM controller are coupled to the plurality of input pins, and the plurality of outputs of the PWM controller are coupled to the plurality of output pins. The inductor-open detection circuit has an input coupled to a pin of the plurality of input pins, and has an output coupled to the PWM controller.

The invention relates to the technical field of vibration and noise control, discloses a new energy automobile motor high-frequency vibration and noise active suppression system and method, and aims to solve the problems of poor high-frequency vibration and noise suppression effect, real-time performance, adaptive capacity and system cost complexity of an existing new energy automobile motor. The method comprises the following steps: acquiring and preprocessing motor operation state data, extracting high-frequency harmonic characteristics, and generating predicted harmonic characteristics in combination with working condition prediction; and superposing the self-adaptive compensation quantity to a motor voltage instruction, and driving an inverter through pulse width modulation to realize active suppression of high-frequency vibration and noise. The system comprises a data acquisition preprocessing module, a harmonic feature extraction module, a working condition sensing prediction module, a self-adaptive compensation quantity generation module and a pulse width modulation correction module. By the adoption of the technical scheme, efficient, real-time and self-adaptive suppression of high-frequency vibration and noise of the motor can be achieved, the level of the high-frequency vibration and noise is remarkably reduced, the driving comfort is improved, and the complexity and cost of the system are optimized.

The invention discloses a direct-current voltage self-balancing method in the high-low voltage ride-through process of a high-voltage frequency converter, and the method comprises the steps: obtaining an electric signal of the high-voltage frequency converter, calculating the Lyapunov index of a system in real time based on the electric signal, so as to quantify the chaotic state of the system, and generating a real-time Lyapunov index sequence; according to the real-time Lyapunov index sequence, the gradient of the real-time Lyapunov index sequence relative to a preset system state variable is determined, and a Lyapunov gradient field is constructed; using the Lyapunov gradient field to generate a basic control quantity through nonlinear mapping; and converting the basic control quantity into a pulse width modulation parameter to form a PWM control signal set to be applied to the high-voltage frequency converter. According to the method, the Lyapunov gradient field is constructed to provide prospective direction guidance for control, so that the chaotic oscillation is quickly suppressed, and the dynamic stability of the system under power grid disturbance is remarkably improved.

The invention relates to the technical field of mode control, and discloses a metro operation dual-mode control method and system based on pulse width modulation coding. The method comprises the following steps: defining an initialization voltage range through a power supply measurement module, and adopting a dual redundancy measurement module to realize manual control and automatic operation channel voltage dual-path calibration; the signal collector collects a real-time current signal, and the signal comparator performs anomaly detection to generate a mode selection control signal; the pulse width modulation encoder calculates a duty ratio parameter and generates a current-limiting pulse width modulation signal; the multiple protectors judge the fault state, and the delay controller adjusts the disconnection time sequence of the relay; the time sequence controller establishes a mode switching rule, and the relay linkage controller optimizes an output state; the data collector extracts operation parameters, and the communication interface completes data electrical isolation transmission. Seamless switching between the manual control mode and the automatic operation mode is achieved through the pulse width modulation coding technology, and the stability and reliability of the system in the mode switching process are ensured.

The invention relates to the technical field of permanent magnet synchronous motor control. The invention provides a permanent magnet synchronous motor adaptive high-order terminal sliding mode observer control method. The method comprises the following steps: establishing an expansion equation of a motor under an alpha-beta two-phase static coordinate system; designing a high-order terminal sliding mode surface based on the extension equation; designing a self-adaptive gain; designing a current signal control law and a back electromotive force signal control rate of the high-order terminal sliding mode surface based on the adaptive gain, the expansion equation and the high-order terminal sliding mode surface; obtaining constraint conditions of the adaptive gain and the control gain k; defining an expression of the adaptive gain; designing an adaptive high-order terminal sliding mode observer based on a current signal control law and a back electromotive force signal control rate; acquiring an electrical angular speed and a rotor electrical angle based on an orthogonal component phase-locked loop method; and controlling the operation of the motor based on field-oriented control and space vector pulse width modulation. According to the invention, the control system can maintain robustness and high-precision output at the same time under the high dynamic response requirement.

A controller for controlling a multi-phase power conversion system includes a pulse width modulation (PWM) comparator configured to generate a PWM signal based on a ramp signal, a voltage reference signal and a feedback voltage from the power conversion system. A circuit may be configured to generate, based on the PWM signal, PWM signals by delaying the PWM signal with different delay times, and feed the PWM signals to respective switching power converters of the multi-phase power conversion system, to regulate an output voltage of the power conversion system. Each switching power converter may include a control circuit configured to adjust a pulse width of a received PWM signal based on a reference current and an output current of a corresponding switching power converter, to generate an adjusted PWM signal, based on which, an output voltage of the corresponding switching power converter is regulated.

The invention provides a power distribution network single-high-frequency resonance rapid tracking and adaptive suppression method, a multi-mode dynamic cooperative adaptive suppression system is established based on a PCCVF adaptive method, and the damping characteristics of a power distribution network are remodeled by injecting compensation current into a power distribution network system so as to realize broadband resonance suppression of the power distribution network. The compensation current injection method comprises the following steps: step 1, detecting resonant frequency deviation of a power distribution network through real-time FFT (Fast Fourier Transform); 2, performing dynamic phase angle correction based on a phase prediction residual error of real-time frequency deviation; step 3, constructing a layered impedance remodeling module, and ensuring stable power transmission; 4, establishing a frequency-variable impedance model of the power distribution network based on resonance energy spectral density analysis, dynamically optimizing parameters through fuzzy logic of a bell-shaped membership function, and feeding harmonic compensation current into the power distribution network by using a space vector pulse width modulation technology; according to the invention, single high-frequency resonance can be effectively suppressed, the response and tracking performance of the system is improved, and the spectrum analysis efficiency and bandwidth occupation are optimized.

The present disclosure provides a method for driving a cholesteric liquid crystal display device. The method includes the following steps: utilizing a driving circuit section to sequentially activate each scanning electrode within a display panel; utilizing the driving circuit section to apply first alternating-current (AC) voltage pulses to pixel circuits on an activated scanning electrode during a first stage within a pulse-width modulation (PWM) scanning procedure of an activated scanning electrode; and utilizing the driving circuit section to apply second AC voltage pulses to the pixel circuits on the activated scanning electrode during a second stage of the PWM scanning procedure. A first voltage amplitude and a first period of the first AC voltage pulses are different from a second voltage amplitude and a second period of the second AC voltage pulses, respectively.

A method comprises: providing, in an onboard charger of an electric vehicle, a direct current (DC) to DC stage including a dual-active bridge having switches arranged in multiple legs, each of the multiple legs controlled by a corresponding one of pulse width modulation (PWM) signals; and dynamically modulating the PWM signals to improve zero voltage switching (ZVS) in the onboard charger.

The invention relates to the technical field of digital control switching power supplies, and particularly discloses a switching power supply dynamic response adjusting system based on digital control, which comprises a digital controller, a multi-channel analog-to-digital conversion module, a parameter identification module, a self-adaptive control law adjusting module, a pulse width modulation driving module and a stability monitoring module. On-line identification of key parameters of a system is realized by constructing a nonlinear state space model and combining an extended Kalman filtering algorithm, dynamic compensation is carried out for non-minimum phase characteristics such as a right half plane zero point, and a self-adaptive control law adjustment module optimizes a control strategy in real time according to an updated model. A Lyapunov stability criterion and a predictive control mechanism are introduced, the robustness and response speed of the system are improved, and a stability monitoring module identifies an abnormal state through sliding window variance analysis and peak detection and triggers a fault-tolerant mechanism to guarantee safe operation of the system.

The embodiment of the invention provides an excitation signal generation method and system and a digital eddy current sensor, and the method comprises the steps: outputting a square wave signal through a pulse width modulation assembly of a microcontroller unit, and enabling the frequency and resolution of the square wave signal to be adaptive to eddy current probes with different inductance values; inputting the square wave signal into a low-pass filter for filtering, and setting the cut-off frequency of the low-pass filter, the suppression times of higher harmonics and the attenuation slope so as to output a sine wave signal with a target total harmonic distortion range; the amplitude of the sine wave signal is collected in real time, and the pulse width modulation duty ratio and the passband gain of a low-pass filter are dynamically adjusted in combination with a digital control algorithm, so that the sine wave signal is subjected to self-adaptive adjustment and correction and is output; and taking the sine wave signal as an excitation source of an eddy current probe, and driving the eddy current probe to carry out nondestructive testing. According to the invention, the excitation signal which gives consideration to high-frequency signal generation, deep harmonic suppression and digital adaptive adjustment can be generated.

The invention belongs to the field of electrical variable measurement, and particularly relates to a single battery equalization management method for a lithium battery BMS (Battery Management System) protection board, which comprises the following steps of: acquiring voltage, temperature, total current and cycle index of each single battery in real time; based on a second-order equivalent circuit model and an extended Kalman filtering algorithm, multi-source information is fused, and the health state and the charge state are estimated with high precision; constructing a dynamic equilibrium trigger threshold fusing the charge state standard deviation, the range and the health state attenuation factor; a bidirectional flyback or multi-winding transformer active equalization strategy is selected according to the inconsistent distribution characteristics and the temperature field, and equalization current is accurately controlled through pulse width modulation; and continuously monitoring the efficiency, the temperature rise rate and the convergence in the equalization process, and dynamically optimizing the equalization parameters by using the fuzzy logic controller until the inconsistency reaches the standard. According to the technical scheme, accurate, self-adaptive, high-efficiency and safe single battery equalization management can be realized, the service life of the battery pack is effectively prolonged, and the operation reliability of the system is improved.

The invention provides a motor drive control method and system for a high-speed hair dryer. The method comprises the following steps: acquiring a real-time sampling value of bus voltage; when the real-time sampling value reaches a preset voltage threshold value, performing vector operation on a torque current integral value of the motor current, and determining an initial position angle of a rotor; performing Clark transformation on the three-phase winding endpoint voltage according to the initial position angle of the rotor to generate a voltage component; determining a wind power interference coefficient of the torque current according to the voltage component, and determining a corresponding wind power state identifier in combination with a preset threshold value; configuring a sliding-mode observer according to a starting parameter group of a motor starting control mode corresponding to the wind power state identifier, and determining a rotor motion state parameter by performing phase tracking on output of the sliding-mode observer; and generating a three-phase pulse width modulation driving signal through the rotor motion state parameters to perform driving control on the motor. According to the scheme, the starting reliability and control precision of the motor can be remarkably improved, and the service life of the blowing cylinder is effectively prolonged.

The invention relates to an FOC control method based on an automobile air conditioner module motor without a Hall sensor, and belongs to the technical field of automobile electronics. The method comprises the following steps: injecting double-frequency voltage pulses into a stator in stages to position a rotor; collecting current through a sampling resistor and filtering to construct a rotor flux linkage distribution model, and presetting rectangular axis current in combination with noise reduction of a miniature acoustic sensor and air speed gear of an air conditioner; an extended Kalman filter observer is adopted to reversely deduce the load torque, and the torque change rate is monitored to trigger instantaneous load impact protection; the voltage space vector amplitude is corrected through voltage feed-forward compensation, a resistor-capacitor series filter circuit is additionally arranged, and phase dislocation pulse width modulation is adopted for resisting interference; and establishing a motor efficiency-rotating speed-load three-dimensional optimization method, starting dynamic flux-weakening control, and estimating the winding temperature through the stator resistance to adjust the flux-weakening depth. Accurate starting and dynamic load adaptation of the Hall-sensor-free motor are achieved, starting out-of-step and noise exceeding are avoided, and stable air volume of an automobile air conditioner and long-term reliable operation of the motor are guaranteed.

The invention relates to a heat dissipation optimization method and system for an air conditioner control panel, and belongs to the technical field of energy-saving air conditioner heat dissipation. Comparing the real-time temperature data with a preset temperature threshold value, and determining a heat dissipation mode; when the real-time temperature data is lower than a first threshold value, a first-stage heat dissipation mode is started, a heat dissipation fan is controlled to operate at the lowest rotating speed, and a basic heat conduction path of a cooling fin is activated; when the real-time temperature data is between a first threshold value and a second threshold value, a second-stage heat dissipation mode is started, the rotating speed of a heat dissipation fan is adjusted to be in linear proportion to the real-time temperature data, and an expansion heat conduction path of a cooling fin is started to increase the heat dissipation area; and when the real-time temperature data exceeds a second threshold value, starting a three-stage heat dissipation mode, switching to phase change material auxiliary heat dissipation, controlling a heat dissipation fan to operate at the maximum rotating speed, dynamically adjusting the heat conduction efficiency of a heat dissipation sheet through a pulse width modulation signal, and triggering a temperature alarm signal.

The invention relates to a distributed photovoltaic power station main converter and a control method thereof, and belongs to the field of photovoltaic power generation. The main current transformer comprises a T-type three-level current transformer and a Buck-Boost current transformer; the T-type three-level converter comprises three bridge arms, two output capacitors and the like; each bridge arm is provided with four power switch tubes; the two output capacitors are connected in series, and the connection point is called as the midpoint O of the T-type three-level converter. And one end of a direct-current inductor of the Buck-Boost converter is connected with the midpoint O. The T-type three-level converter adopts PI control and a carrier pulse width modulation strategy to realize alternating current side current harmonic wave minimization of the T-type three-level converter; the Buck-Boost converter adopts a PI control method to realize neutral-point potential automatic balance control. The method is small in current harmonic wave, low in cost and simple to control, and can realize quick and automatic balance of the neutral-point potential, thereby effectively coping with the influence of illumination and power grid voltage fluctuation on system control, and realizing quick and stable control of the distributed photovoltaic power station.

The invention discloses an adaptive current decoupling control method for a sliding mode of a permanent magnet synchronous motor, and the method comprises the steps: designing an extended state observer to observe a d-q axis current and a voltage disturbance term, carrying out the difference between a current observation value and a reference current, and inputting the difference into a non-singular integral terminal sliding mode controller, thereby obtaining a d-q axis voltage; and then the observed d-q axis voltage disturbance term is superposed to form a total d-q axis voltage. And then identifying the d-q axis inductance and permanent magnet flux linkage of the permanent magnet synchronous motor by using a recursive least square method with dynamic forgetting and adaptive regularization factors, and sending the d-q axis inductance into the extended state observer to realize a closed-loop adaptive extended state observer. And after coordinate transformation and space vector pulse width modulation are carried out on the d-q axis total voltage, the d-q axis total voltage is used for driving an inverter to control the permanent magnet synchronous motor. The method improves the current decoupling effect and anti-disturbance capability of the permanent magnet synchronous motor, adaptively adjusts the parameters of the controller according to the change of working conditions, and improves the robustness of the system.

An example system includes a DC / DC converter interposed between a battery pack and an electrical load of a vehicle, the DC / DC converter having a first power supply phase and a second power supply phase; and a controller, including: a power request circuit structured to interpret a power request for the electrical load; a power provision circuit structured to determine a current value for each of a plurality of power supply phases; and a power command circuit structured to provide a phase power command value in response to the current value for each of the plurality of power supply phases, the phase power command value including a duty cycle command for each of the plurality of power supply phases; and wherein each of the power supply phases are responsive to the phase power command value to provide pulse width modulated (PWM) electrical power to the electrical load.

The invention relates to the technical field of power conversion, in particular to a collaborative optimization control method, system and equipment of a multi-mode power conversion device and a storage medium. The method comprises the following steps: constructing a double-layer collaborative architecture by collecting multi-source heterogeneous operation parameters, obtaining a device operation state, power grid dynamic characteristics and environment change information, establishing a cross-level communication protocol to realize data synchronization, and outputting a real-time working condition feature vector; deploying a dynamic mode switching engine based on a real-time working condition feature vector, triggering multi-mode operation strategy reconstruction through a state transition probability model, constructing a self-adaptive switching mechanism comprising a parallel power supply mode, an island operation mode and a hybrid modulation mode, and establishing a composite fault response system to realize pre-diagnosis and grading disposal of an abnormal state; millisecond-level real-time control is implemented in the edge control layer to generate a pulse width modulation driving signal, multi-target global optimization is implemented in the cloud optimization layer to dynamically adjust an operation parameter combination, and closed-loop control is formed through bidirectional data interaction and strategy feedback.

The invention relates to the technical field of unmanned aerial vehicles, in particular to a multi-rotor unmanned aerial vehicle interception control system based on reinforcement learning. The system comprises an image acquisition module used for acquiring a target image of a target unmanned aerial vehicle; the IBVS controller is used for extracting a target position in the target image, calculating an image error, constructing and training a reinforcement learning model, constructing a current state as input of the reinforcement learning model based on the image error and the state information of the multi-rotor unmanned aerial vehicle, obtaining an expected attitude output by the reinforcement learning model, and outputting the expected attitude to the multi-rotor unmanned aerial vehicle. Calculating an error between the current attitude and the expected attitude to generate a control instruction for intercepting the trajectory of the target unmanned aerial vehicle; and the flight controller is used for receiving the control instruction, converting the control instruction into a pulse width modulation signal and outputting the pulse width modulation signal to motors to adjust the rotating speed of each motor and execute an interception task. The method can dynamically adapt to target movement in a complex environment, and realizes real-time and efficient interception of the target unmanned aerial vehicle.

The invention relates to the technical field of motor regulation and control, in particular to a dust collector motor vibration noise reduction method and system, and the method comprises the steps: obtaining a sinusoidal modulation electric signal generated by a sinusoidal pulse width modulation frequency converter, and carrying out the harmonic filtering of the sinusoidal modulation electric signal, and obtaining a higher harmonic; calculating harmonic interference magnetomotive force according to the higher harmonics, multiplying the harmonic interference magnetomotive force by the air gap magnetic conductance to obtain radial magnetic flux density, and calculating radial electromagnetic force waves; performing feature extraction operation on the radial electromagnetic force wave to obtain a feature set, performing principal component analysis operation based on vibration intensity to obtain a radial vibration principal component feature set, and performing noise principal component harmonic extraction operation on the higher harmonic according to the radial vibration principal component feature set to obtain a noise harmonic; and performing noise reduction calculation on the sinusoidal modulation electric signal according to the noise harmonic wave to obtain a noise reduction modulation electric signal, and performing power control on the motor. The vibration noise of the dust collector motor can be reduced.

The present application relates to a semiconductor temperature control device and a control method thereof. The device includes: a temperature detection module, which is used to perform multi-point detection on the temperature field of a semiconductor laser to obtain multiple temperature measurement values, so as to perform thermal field simulation calculation on the temperature distribution of the semiconductor laser to obtain a temperature field distribution matrix; a heat flow analysis module, which is used to perform heat flux density calculation on the semiconductor laser according to the temperature field distribution matrix to obtain the heat flux density distribution, so as to perform multi-channel pulse width modulation processing on the thermoelectric refrigeration component to obtain a temperature regulation drive signal; a closed-loop control module, which is used to perform adaptive regulation processing on the thermoelectric refrigeration component according to the temperature regulation drive signal to generate a temperature regulation feedback signal, so as to perform closed-loop adjustment on the drive current of the thermoelectric refrigeration component until the thermoelectric refrigeration component maintains the temperature of the semiconductor laser within the target temperature range based on the adjusted drive current. The use of the device can ensure the dynamic balance of temperature regulation.

The invention is suitable for the field of motor driving and control, and provides a dead-beat predictive current control method and system for a direct-current bias vernier reluctance motor, and the method comprises the steps: obtaining the operation data of a target motor, and carrying out the preprocessing of the obtained operation data; inputting the preprocessed operation data into an extended state observer with coupling compensation, and outputting extended state prediction parameters; inputting the extended state prediction parameter into a dead-beat prediction current control model to obtain a dq0-axis regulation voltage; carrying out coordinate transformation on the adjusting voltage of the dq0 axis, and carrying out space vector pulse width modulation to obtain a switching sequence of dual-inverter SVPWM (Space Vector Pulse Width Modulation); acting the switching sequence on a phase winding of the target motor; according to the method, disturbance caused by voltage coupling is considered in the process of predicting current and disturbance; this allows compensation of voltage coupling interference, thereby reducing the influence of interference caused by parameter changes and coupling voltage, and enhancing dynamic response capability.

The invention relates to a capacitor type selection method and device of a unified power quality conditioner and computer equipment, and relates to the technical field of power electronics, and the method comprises the steps: obtaining modulation wave functions of space vector pulse width modulation of input and output AC ports when the unified power quality conditioner is in a preset operation condition; the operation conditions comprise rated and limit conditions; obtaining first current values of the input and output AC ports; obtaining a modulation wave value corresponding to each modulation wave function, and obtaining a first capacitance current average value of each capacitor in each switching period based on the modulation wave value and each first current value; based on the first capacitance current average value of each capacitor, determining a second capacitance current average value flowing through each capacitor in a fundamental wave period; based on the first capacitance current average value and the second capacitance current average value, obtaining a capacitance current instantaneous value of each capacitor in a fundamental wave period; and processing the current instantaneous value of each capacitor based on a preset mode to determine the minimum capacitance value of each capacitor so as to realize the type selection of each capacitor.

The invention discloses a dead zone compensation control method, electronic equipment, a storage medium and a product, relates to the technical field of motor control, is applied to a motor control system, and comprises the following steps: obtaining an original duty ratio of the motor control system through space vector pulse width modulation, and calculating a compensation duty ratio for dead zone compensation in the motor control system; determining a first partition threshold value according to the minimum pulse width duty ratio of the motor control system, and determining a second partition threshold value according to the minimum pulse width duty ratio and the dead zone duty ratio of the motor control system; according to the first partition threshold value and the second partition threshold value, the duty ratio value interval is divided, and compensation subintervals are obtained; and determining a target compensation subinterval of the original duty ratio in each compensation subinterval, and executing a duty ratio compensation strategy of the target compensation subinterval to obtain a target duty ratio. The technical problem of unstable compensation control is solved.