基于扩展滑模观测器的永磁同步电动机无传感器控制

针对传统滑模观测器在估计电机转速时存在的抖动问题,本文通过永磁同步电机扩展状态方程以及扩展滑模观测器,将滑模控制和模型参考自适应结合在一起,来提取电机转速。从仿真和实验两方面,对新方法与传统滑模观测器方法作了详细的比较,结果验证了新方法可以避免传统滑模参数估计时存在的抖动问题,同时具有良好的动静态性能以及更高的估计精度。

Sensorless Control of Permanent Magnet Synchronous Motor Based on Extended Sliding Mode Observer

Aiming at the chattering problem arising from the estimation of rotor velocity by using traditional sliding mode observer(SMO),the paper combines sliding mode control with model reference adaptive systems by the extended state equations of permanent magnet synchronous motor(PMSM) and the equations of extended sliding mode observer of PMSM,and then the new estimation method of rotor velocity is presented.The detailed comparison between the proposed method and the traditional one is introduced according to simulation analysis and experimental validation.The simulation and experimental results show the superiority of the proposed method which avoid the chattering problem of the traditional one and better estimated precision,moreover,good dynamic and static performance are achieved.