Sliding Mode Speed Control System of PMSM Based on New Reaching Law and Disturbance Compensation
In response to the issues of slow response,low control precision,and poor robustness in the tradi-tional PI speed control system for permanent magnet synchronous motors,the paper proposed a novel sliding mode speed control system.Firstly,a new variable exponent approaching law was introduced,and a novel segmented exponent-type function was employed to optimize the switching term,enhancing the approaching speed while attenuating system oscillations.Secondly,based on the new approaching law,a non-singular fast terminal sliding mode speed controller was designed to further improve the system's dynamic response.Final-ly,an improved extended disturbance observer was designed,and a cascade disturbance compensation strat-egy was proposed based on the Landau discrete adaptive identification algorithm to achieve feedforward com-pensation for uncertain disturbances affecting the system,further enhancing the speed and disturbance rejec-tion capabilities of the speed control system.Simulation results demonstrate that the designed sliding mode speed control system effectively improves the dynamic control performance,control precision,and robustness of the system.
PMSMsliding mode controllernonsingular fast terminalapproaching lawextended disturb-ance observer
万方数据
维普
