关键词: 永磁同步电机, 滑模观测器, 无位置传感器, 卡尔曼滤波, 脉冲电压法

Abstract: In order to suppress the chattering phenomenon in the speed sensorless control method of permanent magnet synchronous motor based on traditional sliding mode observer, the traditional sliding mode observer was optimized by improving the switching function, low-pass filter and speed extraction, and quadratic Kalman filter for back EMF. The pulse voltage method was optimized, and a method which effectively reduced the estimation error of rotor initial angle of permanent magnet synchronous motor was proposed. The experimental results show that the sensorless control strategy of permanent magnet synchronous motor based on improved sliding mode observer can effectively suppress the chattering phenomenon and realize the high-performance control of permanent magnet synchronous motor at full speed.

Key words: permanent magnet synchronous motor, sliding mode observer,position sensorless, Kalman filter, pulse voltage method