Flux-weakening Control of Permanent Magnet Synchronous Motor Based on Sliding Mode Active Disturbance Rejection Control

Abstract

Since it is difficult to control the magnetic intensity reduction control of permanent magnet synchronous motor, there are two control methods, sliding mode control and self-disturbance reactance control, which make the magnetic intensity reduction control easier to control. The sliding-mode control has some problems, such as large jitter and coarse torque. Moreover, the parameters of active disturbance rejection control are complex. A magnetic weak control method of permanent magnet synchronous motor based on sliding mode active disturbance rejection is proposed. Firstly, based on the principle of coordinate transformation, the mathematical model of PMSM is established, and then the sliding mode controller and the active disturbance rejection controller are respectively established. Based on the sliding mode active disturbance rejection controller, the sliding mode active disturbance rejection controller is established, which not only retains the original disturbance rejection ability of the active disturbance rejection controller, but also speeds up the response speed of the speed regulation system. Finally, MATLAB/Simulink is used to build the simulation model of the whole system, and the performance of the sliding mode active disturbance rejection controller is compared with the sliding mode control and the active disturbance rejection control. The results show that the current, torque and speed stability of the PMSM magnetic-weak control based on the sliding mode active disturbance rejection control are better than those of the sliding mode control and active disturbance rejection control.