Research On Permanent Magnet Synchronous Motor Control System Based On DSP

Permanent magnet synchronous motor has a key influence in communication and AC servo control system due to its diversified structure and high-quality operating characteristics.With the continuous development trend of raw material technology,power electronic technology,microcontroller technology,and mechanical equipment manufacturing and processing technology,permanent magnet synchronous motors are increasingly used in various industrial production industries.It can be seen the importance of its application value in industrial production,so the control system of PMSM also has high research significance.This article designs the PMSM control strategy,establishes a mathematical model on the basis of mastering its structure,and uses simulation analysis to verify the pros and cons of the control strategy.The TMS320F2812 digital signal processor is used in the verification of the vector control system.The following is the main work content of this project:(1)In order to better analyze the vector control strategy of the permanent magnet synchronous motor,understanding its structure and working principle is the most basic work,and then by using software to simulate,verify the pros and cons of the control strategy.This paper describes in detail how the voltage space vector SVPWM accurately controls the motor,and builds the necessary vector control system simulation diagram for simulation analysis.After verification,it is found that although the system has a certain degree of stability,the traditional PMSM vector control system,In normal operation,whether it is the speed ratio curve or the current curve,there will be short-term fluctuations before stabilization,and there is a large overshoot.(2)It is analyzed that the above problems are caused by the parameter settings of the PI controller,and the parameters of the PMSM are time-varying,and external disturbances and some uncertain factors will affect the parameter settings of the controller.Therefore,consider using an active disturbance rejection controller to replace the PI controller in the speed loop.(3)The active disturbance rejection controller has the advantage of not relying on the actual domain model,and the control board itself can compensate and reduce the oscillation of the measured target.In order to further increase the ability of PMSM to resist load disturbance during the speed control process,it is proposed to apply predictive control algorithm to the current loop to improve the control strategy of permanent magnet synchronous motor,and its performance is verified by simulation.(4)Introduced the performance characteristics of the TMS320F2812 high-speed digital signal processor developed by TI,and designed a permanent magnet synchronous motor control system experimental platform with DSP as the core.On this basis,a permanent magnet was written using CCS8.0 software as a development platform.Synchronous motor vector control program,and on the basis of this program,modify the current loop controller program,write the program of the auto-disturbance rejection controller,complete the main program and subprogram design corresponding to the sub-modules that realize different functions,and design The interrupt service program that can interrupt its operation,through actual operation experiments to verify the effect of the entire control system.Simulation and experimental results show that active disturbance rejection control can effectively reduce system disturbances,and model predictive control algorithms have better robustness to the influence of load changes,and various dynamic performance indicators of speed response are better.Torque the pulsation can be effectively reduced,which is a practical motor control strategy.