关键词: 永磁同步电动机, 无传感器控制, 转矩脉动抑制, 全通滤波器, 快速滑模控制

Abstract: Aiming at the non-sinusoidal induction electromotive force of permanent magnet synchronous motor caused by non-sinusoidal rotor flux, a control method without position sensor and torque sensor was studied, which can suppress the torque ripple. The method is simple to control and can suppress the 6th, 12th, and 18th harmonic torque ripple caused by the back electromotive force. Based on the mathematical model of the permanent magnet synchronous motor, the compensation current was generated to eliminate the torque ripple, and the fast sliding mode controller was used for speed control to increase the robustness. Position information was obtained according to the approximate integral flux estimation with the all-pass filter,thus position sensorless control was realized. Simulation results verify the effectiveness and practicability of the method.

Key words: permanent magnet synchronous motor (PMSM), , sensorless control, , torque ripple suppression, , all-pass filter, , fast sliding mode control