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Improved Permanent Magnet Synchronous Motor Control System Based on Position Sensorless Technology

In order to improve the stability and anti-interference performance of permanent magnet synchronous motor (PMSM) sensorless control system, the active disturbance rejection control (ADRC) is used instead of the traditional PI controller, and the sensorless motor control system is established based on model reference adaptive system (MRAS) and high-frequency injection method. Meanwhile, considering the large numbers of parameters that need to be adjusted for ADRC, a one-order model is adopted and its structure is improved and simplified. In the new model, the linear error control law is used to instead of the Nonlinear State Error Feedback (NLSEF) control low. The simulation results show that the improved ADRC controller can effectively solve the contradiction between overshoot and rapidity, and has better dynamic performance compared with the PI controller.