Design Of Permanent Magnet Synchronous Motor Drive System Based On ARCP Soft Switching

Permanent Magnet Synchronous Motor has the advantages of excellent speed regulation performance,higher power density and work efficiency,so it is widely used in various industrial manufacturing production scenarios.The control effect of the permanent magnet synchronous motor is restricted by factors such as the time delay of the driver and the output PWM frequency.Generally,higher PWM frequency means better current loop response,but the increase of PWM frequency leads to shorter turn-on and turn-off time of the device,which inevitably increase EMI and device power consumption.The development of soft switching technology can greatly reduce EMI interference and device power consumption while increasing the PWM frequency,which is of great significance to the improvement of driver performance.Based on the understanding of the current research status and the latest development direction in this field,this paper selects the three-phase Auxiliary Resonance Communicated Pole topology as the PWM realization method of vector control through the analysis of the basic modeling and control method of permanent magnet synchronous motor,in order to achieve the purpose of reducing EMI and device power consumption while increasing the frequency.This topology can adapt to the current mainstream seven-segment SVPWM modulation method.Based on the analysis of the ARCP ideal topology soft-switching sequence,this paper also considers some parasitic parameters in the actual system,and analyzes its influence on the soft-switching commutation process under different loads.This paper adopt ARCP topology with clamping diodes to suppress oscillations caused by parasitic parameters.Based on the ARCP variable timing control method,an engineering selection method of the overcharge current value is designed.This method determines the required overcharge current under different working conditions through a computer-assisted cyclic search method,and provides a reference value for setting overcharge parameters in actual projects.Based on the three-phase ARCP variable timing control,a bus midpoint voltage control method without an additional midpoint voltage regulator circuit is designed.The midpoint voltage is adjusted and stabilized by asymmetric charging of the three-phase resonant inductor.In this paper,by building a multi-software co-simulation platform,a variety of different programming languages and algorithms are co-simulated with SIMULINK as the carrier platform to achieve the most realistic simulation effect.An experimental prototype of a three-phase ARCP permanent magnet synchronous motor driver is built.An ARCP controller with a midpoint voltage stabilization function based on FPGA is designed.Experimental results are given to demonstrate the validity of the proposed control method and theoretical analysis.