428 results about "Triangular wave" patented technology

A motor controller for pulse heating of a power battery. The motor controller includes an inverter circuit, the inverter circuit includes three switching transistor bridge arms, two ends of each switching transistor bridge arm are respectively configured to connect to positive and negative electrodes of the power battery through a direct current bus, and bridge arm midpoints of the three switching transistor bridge arms are separately configured to connect to a three-phase winding of a motor. The bridge arm midpoints of the three switching transistor bridge arms are configured to output a three-phase current, the three-phase current is used to generate a pulse alternating current on the direct current bus, and the pulse alternating current is used to heat the power battery. A current of each phase of the three-phase current is a unipolar triangular wave, and a sum of the three-phase current is zero.

The invention provides a circulation power optimization method and system for a three-phase dual-active bridge, and relates to the field of power electronics, the method comprises the following steps: determining an optimal backflow modulation strategy set corresponding to a hybrid modulation group, the hybrid modulation group comprising triangular wave modulation, trapezoidal modulation, synchronous modulation and extended phase shift modulation, the optimal backflow modulation strategy set corresponding to the hybrid modulation group comprises modulation modes and degree-of-freedom relationships corresponding to different transmission power per unit value ranges in different voltage conversion ratio ranges; determining a degree of freedom and power relationship set corresponding to the hybrid modulation group, wherein the relationship set comprises a relationship between the degree of freedom and power of different transmission power per unit values corresponding to each mode; the phase shift angle, the primary side duty ratio and the secondary side duty ratio are determined by combining the real-time voltage conversion ratio and the real-time virtual power per unit value, operation of the three-phase dual-active bridge is controlled, and the method has the advantages of reducing complexity and improving portability and efficiency.

In a power conversion device that converts a DC voltage to an AC voltage by turning a semiconductor switching element (Q) on and off, a drive controller (10) that generates a gate signal for driving the semiconductor switching element (Q) on and off is configured to generate a first command which is a voltage command for a target voltage of the AC voltage, generate a triangular wave carrier signal whose frequency is an even multiple of a fundamental wave component of the first command, and generate the gate signal from the carrier signal and a second command composed of a harmonic signal including at least one odd-multiple harmonic signal whose frequency is an odd-multiple and one even-multiple harmonic signal whose frequency is an even multiple of the fundamental wave component of the first command, and the first command.

The invention provides a blade profile scanning method based on actual measurement blade profile normal correction, which comprises the following steps: S1, selecting sections based on a blade theoretical model, and generating theoretical measurement points of different sections; s2, improving a scanning path based on the theoretical measurement point; s3, based on the improved scanning path, scanning and measuring the blade profile of each section, and outputting an actual measurement coordinate result of each measurement point; s4, calculating a normal vector of an actual measurement point based on the actual measurement coordinate result; and S5, performing radius compensation on the obtained actual measurement coordinate result of the normal vector of the actual measurement point, and outputting the compensated measurement point coordinate of the actual blade profile. According to the method, actual measurement data are obtained through scanning along the triangular waveform, and the normal of each point on the actual blade profile is approximately calculated, so that the large cosine error generated when the blade profile is measured in the current traditional uniform-section method when the deviation between a real object and a model is large is reduced, and the measurement precision of the blade profile is improved.

The invention relates to a current reference quantity feed-forward compensation control method and system. The control method comprises the following steps: determining a current inductive current reference value of a triangular wave type power electronic converter; obtaining a PI control component based on the current inductive current reference value; subtracting the current inductive current reference value from the inductive current reference value of the previous period to obtain an inductive current reference value variable quantity; feedforward operation is carried out according to the inductance current reference value variable quantity and the working condition parameters of the triangular wave type power electronic converter, and a feedforward compensation component is obtained; and summing the PI control component and the feed-forward compensation component to generate a duty ratio so as to realize control of the triangular wave type power electronic converter. According to the current reference quantity feed-forward compensation control method and system provided by the invention, the tracking speed of the triangular wave type power electronic converter can be improved on the premise of not influencing the control precision of the triangular wave type power electronic converter.

The invention discloses a millimeter wave detector suitable for a short-distance moving target. The millimeter wave detector comprises a millimeter wave front end and an intermediate frequency signal processing unit, wherein the intermediate frequency signal processing unit comprises a low-pass filtering and amplifying circuit which is used for realizing low-pass filtering of a first preset frequency; comprising a detection circuit which is used for outputting an envelope signal of a second preset frequency and filtering a triangular wave signal of a third preset frequency; the band-pass filtering and amplifying circuit is used for realizing band-pass filtering between a fourth preset frequency and a fifth preset frequency; and the signal peak threshold judgment circuit is used for judging whether a detection target appears in a distance range needing to be detected or not according to the signal output by the band-pass filtering and amplifying circuit. The millimeter wave detector suitable for the short-distance moving target has the beneficial effect that the short-distance target detection sensitivity can be effectively improved.

The invention discloses a multi-node mutual positioning method and system in a complex environment, each node can be set as a master node or a slave node, and the nodes realize a mutual positioning function by transmitting and receiving triangular wave frequency modulation continuous wave signal waveforms; when working in a master node mode, the node is synchronized with working signals of other slave nodes through coarse synchronization and fine synchronization steps, then distance information of the slave nodes is obtained through round-trip flight time calculation, distance information of the slave nodes is obtained through Doppler frequency shift calculation, angle information of the slave nodes is estimated through a DOA method, and positioning of the slave nodes is completed; when the node works in the slave node mode, a to-be-synchronized signal sent by the master node is waited, the to-be-synchronized signal is synchronized with the signal of the master node through the steps of coarse synchronization and fine synchronization, and then the synchronized signal is sent to the master node so that the master node can locate the position of the slave node. According to the method, high-precision mutual positioning among multiple nodes is realized through a working principle of realizing the frequency modulation continuous wave radar among the nodes.

The invention provides a friction force identification method for a trailing edge flap driving mechanism with a bearing, and the method comprises the steps: applying a series of improved triangular waves with different speeds to a driver, carrying out the closed-loop control, carrying out the zero-phase digital filtering of a collected flap angle signal, and suppressing the interference of random noise to the signal, adjusting a buffeting phenomenon of a derivation step length inhibition speed to obtain a flap angular speed, then intercepting a constant-speed ascending section and a constant-speed descending section, then assigning a series of angular speeds, carrying out friction model identification on a relation between friction force and the speed, and then identifying a relation between parameters obtained by identification and a flap angle; finally, the friction force about the flap angle and the flap angular velocity in the flap driving mechanism is obtained.

The invention relates to a magnetotelluric noise suppression method based on ResAtt-CAE, and the method comprises the steps: generating a noise-free signal, adding a noise type into the noise-free signal to construct a noisy signal, and enabling the noisy signal to be matched with the corresponding noise-free signal to form a training set and a test set; designing a ResAtt-CAE model architecture, and realizing cross-level feature fusion by adopting a symmetric structure and jump connection; the ResAtt-CAE model architecture is trained and optimized through the training set and the test set, and the magnetotelluric noise is suppressed through the optimized ResAtt-CAE model architecture. The method is high in noise suppression capability: ResAtt-CAE captures cross-time scale signal features through multi-scale residual learning, enhances effective signal weights in combination with a time domain attention mechanism, and has a remarkable suppression effect on common magnetotelluric noise (square waves, harmonic waves, pulses, triangular waves and the like).

A light-emitting diode (LED) control unit includes: a pulse generator configured to generate a pulse signal; a T-filter configured to convert the pulse signal into a triangular wave signal; a first gate driver configured to receive the triangular wave signal and output a first gate control signal; a second gate driver configured to receive the first gate control signal and output a second gate control signal; a first switch configured to turn on a first LED string corresponding to a first color temperature based on the first gate control signal; a second switch configured to turn on a second LED string corresponding to a second color temperature based on the second gate control signal; and a power supply circuit configured to supply a power supply voltage to the pulse generator, the first gate driver, and the second gate driver by stepping down an operating voltage of the LED driver.

The invention discloses a voltage-to-current circuit, a calibration method, a multi-range calibration method and a power supply, a power amplification unit adopts MOS tubes of different channel types to match with working voltages of opposite polarities, and a bias circuit is combined to superpose exclusive bias, so that the waveform adaptation limitation of a traditional circuit is broken through, and the voltage-to-current conversion efficiency is improved. Alternating current, direct current, triangular waves, square waves and other special waveforms can be stably output, and the adaptability is greatly improved; secondly, pure hardware signal transmission and feedback are carried out in the whole process, the intermediate link of MCU measurement-setting is omitted, multi-stage error accumulation is effectively reduced, output delay is remarkably reduced, and the response speed is higher; in addition, the current sampling feedback unit and the error amplification unit form closed-loop control, power amplification output current is sampled in real time and fed back for calibration, and the precision and stability of the output current are effectively improved. Meanwhile, the bias circuit accurately regulates and controls the conduction state of the MOS tube, the linearity and consistency of current output are improved, and the overall structure is simple and reliable.

The invention discloses an electric linear servo system control method based on cascade LESO-DISMC. The method comprises the following steps: firstly, establishing a complete mechanism model of a permanent magnet synchronous motor servo loading system; then designing DOB interference observer real-time compensation by adopting a LuGre friction model and a gap dead zone model; a feedforward control quantity is constructed by utilizing a measurable displacement signal, and redundant torque is inhibited; designing a dynamic integral sliding mode controller to ensure global stability; a high-low bandwidth LESO is constructed, and both fast tracking and smooth filtering are considered; and finally, trajectory optimization is carried out, a smooth trajectory is generated by adopting polynomial interpolation for the step and triangular wave signals, and mechanical vibration is inhibited. According to the method, a LuGre friction model is adopted to compensate nonlinear friction, cascade linear LESO and sliding mode control are combined, a track is optimized through an S-shaped curve, and the problem of'differential explosion 'is solved; according to the method, instruction smoothing, core control and friction compensation are fused, and the anti-interference capability and the loading precision of the system are improved.

The invention relates to the technical field of converter control, in particular to a novel four-level efficient grid-connected system and a control method, and the method comprises the steps: determining the target output power, the target input power, the actual output power and the actual input power of a converter based on a 4L-HCC converter; determining a phase angle and an output voltage amplitude based on a preset virtual synchronous machine control strategy, and converting to obtain a corresponding three-phase reference voltage; performing HCC internal capacitor voltage control on the converter, establishing a corresponding loss function, and determining a reference wave change range corresponding to each switching device on the converter based on actual setting; the corresponding reference wave signal with the minimum loss function derivative is calculated; and carrying out phase shift pulse width modulation on the converter, taking high-frequency triangular waves with different phases as carriers, comparing the calculated reference wave signals with the carriers, calculating the duty ratio of each switching device of the converter and a switch driving signal, and driving each switching device of the converter.

The invention relates to the technical field of power grid measurement, in particular to a miniaturized wireless self-powered alternating current electric field measurement method and system. Comprising the following steps: acquiring radio frequency energy in an electric field environment, and converting the radio frequency energy into direct current electric energy through a radio frequency energy acquisition system consisting of a microstrip antenna, a voltage doubling rectifying circuit and an energy management circuit; an alternating current electric field signal is collected through a differential dual-electrode sensor structure, and an electric field voltage signal is generated; amplifying the voltage signal through an instrument amplifier, and obtaining a digital signal of the electric field signal through an analog-to-digital conversion circuit; and processing and analyzing the alternating current electric field information according to the digital signal. By combining a radio frequency energy acquisition technology with a differential dual-electrode sensing structure, the electric field sensor has the performance characteristics of self energy supply, miniaturization, high precision, wide frequency response and low power consumption. The system can measure various types of electric field signals, including sine wave, triangular wave and square wave electric field signals, has a wide frequency range and a wide measuring range, and is excellent in linearity.

The invention discloses an automatic frequency stabilization system based on dual-core correlation matching intelligent peak searching. The automatic frequency stabilization system comprises the following steps that S1, a saturated absorption spectrum light path and a circuit are built, debugged and optimized; s2, constructing a double-matching template; s3, triangular wave voltage scanning and clock timing are started, and signals are collected and transmitted; s4, starting a KCF algorithm, applying a template to track model matching, judging a result obtained by matching, finding a peak point and solving a corresponding scanning voltage; and S5, recording a peak point scanning voltage, closing a scanning signal, starting sinusoidal signal modulation, and giving a triangular wave scanning voltage corresponding to a peak value to the sinusoidal signal as an offset. The spectrum line peak value suspected area can be effectively positioned, the double-branch and correlation filtering tracking method can perform precise secondary searching in the suspected area, the locking precision is greatly improved, the long-term stability of 10-12 orders of magnitude is ensured, and meanwhile the good vibration interference resistance can be achieved when a vibration signal occurs.

The invention provides a self-adaptive tuning method for generating pulse-driven alternating-current quantum voltage, and aims to solve the problem that it is difficult to determine an optimal parameter combination in the quantum voltage generation process to achieve quantum working margin maximization. According to the method, a plurality of parameters are optimized through an automatic search algorithm, after optimization is completed, triangular waves are superposed at the bias end of a chip, and the working margin of pulse-driven alternating current quantum voltage is measured and evaluated, so that the optimal parameter setting capable of maximizing the working margin is determined. According to the method, the optimal system performance and stability can be provided in practical application, accurate control and optimization of the system performance are ensured through systematic data acquisition and analysis, and the optimal operation condition in a complex working environment is realized.

The invention discloses a laser radar and a signal modulation method and device of a silicon light phase shifter, and relates to the technical field of laser radars. The signal modulation method comprises the following steps: providing an initial driving voltage signal for a silicon light phase shifter, so that the silicon light phase shifter modulates a laser signal according to the initial driving voltage signal; obtaining the phase of the laser signal modulated by the silicon light phase shifter; modulating the initial driving voltage signal into a periodic modulation voltage signal according to the phase of the laser signal; acquiring a modulation slope corresponding to the modulation voltage signal of each period; performing waveform modulation on the modulation voltage signal according to the modulation slope corresponding to the modulation voltage signal of each period to determine a modulation driving voltage signal; providing the modulation driving voltage signal to a silicon light phase shifter, so that the silicon light phase shifter modulates the laser signal according to the modulation driving voltage signal, and determining a modulation laser signal; and the frequency of the modulated laser signal is linearly changed in a triangular wave form along with time. According to the invention, the measurement precision of the laser radar is improved.

The invention discloses an oscillation circuit. The oscillating circuit comprises a charging and discharging module, an energy storage module, a self-zeroing comparison module and an output module; the self-return-to-zero comparison module comprises a storage unit and an output unit; the charging and discharging module is connected with the energy storage module, and the charging and discharging module is used for charging and discharging the energy storage module according to the power supply voltage, so that the energy storage module outputs a triangular wave signal; the storage unit is connected with a first threshold voltage, a second threshold voltage and an offset voltage of the output unit, and the output unit is used for outputting a comparison signal based on a comparison result of the triangular wave signal and the first threshold voltage when the feedback voltage is at a second level and outputting a comparison signal based on a comparison result of the triangular wave signal and the first threshold voltage when the feedback voltage is at a first level. Outputting a comparison signal based on a comparison result of the triangular wave signal and the second threshold voltage; and the output module is connected with the self-return-to-zero comparison module, the feedback voltage is accessed to the output module, and the output module is used for outputting an oscillation signal according to the comparison signal and the feedback voltage. According to the technical scheme, the reliability and the stability of the oscillation circuit are improved.

The invention provides an online real-time liquid level height measurement method and system for a liquid level sensor. The method comprises the steps that triangular waves and linear waves output by a liquid level sensor converter are fitted in real time; judging a current mode according to the trend of the fitted linear wave, if the trend of the fitted linear wave is rising, judging that the current mode is in a filling mode, and if the trend of the fitted linear wave is falling, judging that the current mode is in a discharging mode; searching the maximum value or the minimum value of the fitted triangular wave, and updating the maximum value or the minimum value in a liquid level height calculation formula and the node number of the sensor; a corresponding liquid level height calculation formula is selected according to the parity of the section number of the sensor, and the real-time liquid level height is calculated; according to the method, in the collecting process, the maximum value and the minimum value in the liquid level height calculation formula are updated in real time, liquid level height calculation errors caused by changes of dielectric constants can be effectively reduced, and the liquid level height measurement precision and real-time performance are improved.

The invention relates to the technical field of geotechnical engineering anchoring, in particular to a method for testing the degradation characteristic of the bearing performance of a recyclable anchor rod under cyclic loading. The method comprises the following steps: preparing a unit body sample anchor-rock interface unit body sample, simulating weathered soft rock according to a specific ratio, pouring a self-compacting concrete anchoring body, and curing and forming; setting a combined parameter of a reference load ratio and a load cycle index, applying a triangular wave cyclic load to simulate a traffic condition, and executing a pull-out test to collect load-displacement data; constructing a two-parameter coupled shear strength degradation model based on test data, and proposing a shear stress-displacement curve model; an anchor rod load transfer control equation is established in combination with the Poisson effect, and shear stress distribution of the anchoring section is iteratively solved by adopting a discrete recursion method; the model is verified through a foundation pit engineering case, the ultimate bearing capacity degradation law of the anchor rod under long-term cyclic loading is predicted, and it is proved that the model can guide engineering safety design. According to the method, the coupling characterization of the cyclic load parameter and the interface degradation mechanism is realized.

The invention discloses a compensation method for monitoring a linear motion target by a camera based on galvanometer control. The method comprises the steps of performing initial angle adjustment on a galvanometer to enable a target to be located at a preset position in a camera view, then setting camera exposure time and continuously shooting target moving images; the image processor selects the first two images of the target moving to the specific area to perform block matching so as to obtain the angular velocity of the galvanometer; when the target moves to a specific area, sine wave signals are generated according to the angular velocity of the galvanometer and input to a galvanometer motion controller, and then the galvanometer is controlled to rotate through a galvanometer motor; the target continues to move linearly, and when the target moves into the specific area, a target moving image shot by the camera serves as a compensation image. According to the invention, a dynamic response sine of the galvanometer is used for scanning a target, the motion blur phenomenon caused by exposure time in a high-speed tracking image is solved, a sine wave signal is used for replacing an existing triangular wave signal to drive a galvanometer motor, and the smoothness and stability of rotation of the galvanometer are improved.

The invention relates to a resonant optical gyroscope signal detection method based on an optical switch. The resonant optical gyroscope signal detection method comprises the following steps: step 1, adopting a narrow linewidth laser as a light source; 2, the split light field enters a lithium niobate phase modulator A and a phase modulator B to be modulated by a triangular wave voltage signal, the light field subjected to phase modulation is coupled in opposite directions to enter a waveguide resonant cavity, and a photoelectric detector A and a photoelectric detector B are used at the output end of the resonant cavity to obtain a voltage signal; and voltage signals obtained by the photoelectric detector A and the photoelectric detector B are accessed to a lock-in amplifier. 3, arranging an optical switch A between the waveguide resonant cavity and the photoelectric detector A; and an optical switch b is arranged between the waveguide resonant cavity and the photoelectric detector B, so that the detection of a gyro signal is completed. The interference of polarization noise can be reduced, and the resonant frequency locking precision and the angular velocity detection sensitivity of the gyroscope are improved.

The invention discloses a laser absorption spectrum system for random noise modulation, which relates to the technical field of trace gas detection of absorption spectrum technology, and is characterized in that a signal generation module generates random noise and low-frequency triangular waves with different powers, different bandwidths and different distribution characteristics; laser generated by the light source module is modulated through random noise and low-frequency triangular waves; laser generated by the light source module enters the light flux cell, namely the annular optical multi-pass cell and reciprocates; the signal processing module receives emergent light of the light flux cell and generates a first feedback signal and a second feedback signal according to the emergent light of the light flux cell; the signal generation module adjusts random noise according to the first feedback signal; the light source module adjusts the laser incident angle according to the second feedback signal. According to the invention, random noise modulation is carried out on the light source, interference noise of the system is suppressed, and under the condition that the physical size and the structure of the light flux cell are ensured, the distribution number of mirror light spots is increased, and the effective absorption optical path of gas in the light flux cell is improved, so that high-sensitivity detection of trace gas is realized.

The invention relates to a control method of a single-stage bidirectional high-frequency isolation inverter, the inverter and a storage medium. The method comprises the following steps: acquiring the voltage polarity of the secondary side circuit and the power transmission direction of the inverter; determining a current working quadrant of the inverter based on the voltage polarity and the power transmission direction; determining a modulation strategy corresponding to the current working quadrant based on the sinusoidal modulation signal and the triangular wave signal; and controlling the working state of a switching tube in the inverter based on the modulation strategy. A full-bridge module is arranged in a primary side circuit, a chopper module is arranged in a secondary side circuit, then the working quadrant of the inverter is determined according to the voltage polarity of the secondary side circuit and the power transmission direction of the inverter, and a corresponding modulation strategy is determined according to the working quadrant so as to control the working state of a switching tube in the inverter. Therefore, normal operation of the inverter under the non-unity power factor condition is completed.

The invention belongs to the technical field of power transmission, and relates to a multi-level D-type power amplifier, a PA chip and a broadband carrier communication system, which comprise a triangular wave signal module, a comparison module, a driving circuit and a loop filter, the triangular wave signal module generates N phase shift triangular waves with different phase shift angles; the comparison module compares the input signal with N phase shift triangular waves with different phase shift angles, and outputs N paths of PWM signals; the driving circuit amplifies the N paths of PWM signals and outputs PWM amplified signals containing N + 1 levels; and the loop filter filters the PWM amplification signal to obtain a filtered PWM amplification signal. According to the multi-level D-type power amplifier, high equivalent bandwidth can be realized with low switching frequency, and meanwhile, the output stage adopts multi-level synthesis, so that the switching loss is reduced.

A Class-D audio amplifier includes a triangular wave generator, a wave reshaping device and a pulse-width modulator. The triangular wave generator generates a first triangular wave. The wave reshaping device generates a second triangular wave by reshaping the first triangular wave. The pulse-width modulator modulates a pair of differential audio input waves with the second triangular wave instead of the first triangular wave to reduce a switching loss of the Class-D audio amplifier.

The invention relates to the technical field of laser ranging, in particular to a signal correction method and device and a ranging system. The method comprises the steps that a driving signal is output to a light source unit in the current round, the light source unit is subjected to frequency modulation through the driving signal to generate a modulated light signal, and the driving signal in the first round is standard triangular wave or sawtooth wave voltage; determining the time-frequency distribution of the modulated light signal, determining the sweep frequency nonlinearity of the time-frequency distribution, and determining the current mapping relation between the output and the input of the light source unit based on the time-frequency distribution and the driving signal; if the nonlinearity is greater than or equal to a preset threshold value, determining a pre-distortion input signal, and updating the driving signal based on the pre-distortion input signal to execute a next round of iteration; and if the nonlinearity is smaller than a preset threshold value, inputting the driving signal in the current round into a light source unit in the ranging system for ranging. The target driving signal enabling the light source to generate the target light signal can be efficiently determined, so that the distance measurement precision is ensured.

The invention discloses an FMCW laser measurement system light source nonlinear correction method based on physical mapping modeling and a TD3 algorithm, and belongs to the fields of laser radar, laser measurement, artificial intelligence and the like. An FMCW laser measurement system is usually limited by the nonlinear characteristic of a tunable laser, especially the bandwidth is increased under triangular wave modulation, a traditional correction method is difficult to achieve a good effect, and the measurement precision and quality are affected. The invention provides an innovative correction method combining a physical mapping model and a TD3 algorithm, and provides an effective compensation mechanism for nonlinear errors of an FMCW laser measurement system under triangular wave modulation. Comprising the following steps that an FMCW laser measurement system is designed and built, PD measurement data are utilized, data preprocessing is carried out, and a data set is built; fitting nonlinear characteristics of the system by using a physical mapping relation; nonlinear correction is realized based on TD3 algorithm control; the nonlinear correction method optimizes the performance of the FMCW laser measurement system through combined application of physical mapping modeling and an RL control strategy.

An electronic device may include an inverter. The inverter may receive switching signals based on a dithered clock signal and output corresponding alternating current signals to a wireless power transfer coil. The dithered clock signal may have a plurality of frequency steps during a repeated cycle of the dithered clock signal. The repeated cycle of the dithered clock signal may comprise a step function that approximates a triangular waveform with steps having unique frequency magnitudes during the repeated cycle.

The invention discloses a trapezoidal wave current soft switching method of an interleaving DC-DC converter, which is used for a two-phase interleaving bidirectional DC-DC converter based on a coupling inductor and a multi-phase interleaving converter thereof, and is characterized in that an inductive current adopts a trapezoidal wave mode, so that the converter works in an approximate critical conduction mode; a fixed switching frequency control or hybrid control method is adopted, so that the device can work in a Buck mode and can also work in a Boost mode. The method for realizing the soft switching is characterized in that the parasitic capacitance or the external resonant capacitor of the switching tube is discharged to be zero under the resonance action of the inductor and the capacitor in the dead zone time when the upper bridge arm switch and the lower bridge arm switch are alternately switched on, so that the zero-voltage switching-on of all the switching tubes is realized. And each phase current sharing control is adopted in the multi-phase interleaving parallel topological structure. According to the invention, the problems of large current peak value and high turn-off loss of a traditional triangular wave current mode are solved, the output ripple current is reduced, a soft switching method is provided, the switching loss is reduced, and the conversion efficiency of the converter is improved.