关键词: 表贴式永磁同步电机, 无位置传感器, 滑模观测器, 超螺旋观测器, 锁相环

Abstract: A sensorless control scheme was proposed based on the super-twisting observer. The super-twisting observer was designed and the phase-locked loop was used to extract the rotor position and speed information. The back electromotive force ( BEMF) was filtered and compensation to estimate the rotor position was used to reduce the phase lag. Simulation and experiment results show that the method has better sine quality of observed BEMF, smallerrotor position chattering compared to traditional sliding mode observer, and certain anti-interference performance against external disturbances.

Key words: surface mounted permanent magnet synchronous motor ( SPMSM ), sensorless control, sliding mode observer( SMO), sufer-twisting observer( STO), phase locked loop( PLL)