A new sliding-mode observer is proposed to solve the problem of chattering and phase delay of sliding-mode observer control system due to switching of high frequency signal.Instead of the symbolic function in the traditional sliding mode observer,the saturation function in the quasi-sliding mode observer is used to replace the symbolic function in the traditional sliding mode observer,and the stability of the system is analyzed by the Lyapunov stability criterion.The simulation results show that the new sliding mode observer can effectively reduce the chattering phenomenon and accurately estimate the rotor position and speed information.
关键词
永磁同步电机/滑模观测器/反电动势/无传感器控制
Key words
permanent synchronous motor/sliding mode observer/counter-electromotive force/sensorless control
维普
万方数据