基于新型趋近律的六相永磁同步电机滑模控制

为了提高六相永磁同步电机调速系统的动态特性,提出一种新型滑模趋近律,在传统指数趋近律的基础上,引入系统状态变量设计双变指数趋近律,抑制滑模控制抖振,并提高滑模趋近速率。使用该趋近律方法设计一六相永磁同步电机滑模速度控制器,并与传统指数趋近律、PI控制器分别进行试验比较。研究表明,在电机起动、稳态和突加负载三种状态下,新型趋近律在转速响应和转矩响应都优于指数趋近律和PI控制,该速度控制器能有效提高系统的静、动态特性与鲁棒性。

Six-Phase PMSM Sliding Mode Control Based on Novel Reaching Law

To improve the dynamic quality of six-phase permanent magnet synchronous motor(PMSM)speed servo system,a novel reaching law was proposed.Based on conventional exponential reaching law,the system state variable was introduced to design the bivariant exponential reaching law in order to suppress the chattering and improve the reaching speed.By applying the novel reaching law,the sliding mode speed controller of the six-phase PMSM control system was designed.The results show that the new reaching law is superior to the exponential reaching law and PI control in the response of speed and torque under the three conditions of motor starting,steady state and sudden loading,and the speed controller can effectively improve the static and dynamic characteristics and robustness of the system.