Research On Maximum Torque Current Ratio Control System Of Permanent Magnet Synchronous Motor Based On FPGA

The maximum torque and current ratio control of the permanent magnet synchronous motor can make the maximum current per unit current torque maximize the use of reluctance torque,improve the torque output capability of the unit current,and make the entire system control achieve the best running state,especially suitable for high speed In large-capacity applications,it requires a large amount of calculation and requires a high calculation speed for the microcontroller.Compared with traditional DSP,programmable logic device FPGA has higher processing speed,higher reliability,on-site programming,system reconstruction and other advantages.This topic mainly discusses the FPGA implementation problem of the maximum torque/current ratio control system for permanent magnet synchronous motor with high performance.Based on the analysis of the advantages and disadvantages of various permanent magnet synchronous motor control strategies,an algorithm model for the maximum torque-current ratio control system of permanent magnet synchronous motor with sliding mode control is proposed.Based on this model,a method based on FPGA is proposed.The realization method of the maximum torque-current ratio control system of permanent magnet synchronous motor,and the design and experimental results of the main circuit and peripheral circuit of the control system are given.The main work and conclusions of this study are as follows:(1)A control system for the maximum torque-current ratio of a permanent magnet synchronous motor with sliding mode control is designed.The system mainly includes sliding mode control,maximum torque-current ratio control,vector coordinate transformation,PID,SVPWM and other modules.The control stabilizes the set point by forcing the drive response along the predetermined trajectory in the phase plane using the switching control algorithm,and outputs the electromagnetic torque.The MATLAB/Simulink model is built on the control algorithm,and the control is switched from the maximum torque-current ratio control to id=0 control at 2s,and the performance is compared and analyzed.The simulation results show that the system has good stability and the servo system has fast response capability.(2)For the proposed control system of the maximum torque-current ratio of a permanent magnet synchronous motor with sliding mode control,an FPGA implementation structure is proposed,and the sliding mode control,the maximum torque-current ratio control,vector Various internal modules,such as coordinate transformation,were designed and optimized in detail.Altera Corporation's 5CSEMA5F31C6 chip was used as the target chip,and the VHDL was used to program the control module for program design,logic synthesis,and timing simulation.In the system design,the use of a custom floating-point method to improve the accuracy of the control system;the use of parallel structures and pipeline structure to improve the speed of data operations;using CORDIC algorithm to operate on trigonometric functions and open-square operations;use of improved cloth Multiplier to increase the speed of the multiplier.After logic synthesis and simulation results analysis,the system functions correctly,and has the advantages of flexible design,system reconfigurability,fast operation speed,and high system reliability.It has important practical application value and has broad application prospects in the military and civilian fields.