关键词: 双曲正切函数, 新型模糊PI控制器, 永磁同步电机, 滑模观测器

Abstract:

In order to solve the problem that permanent magnet synchronous motor (PMSM) with traditional sliding mode variable structure control has excessive chatter vibration and the system overshoots is too much when the motor load is abrupt, a hyperbolic tangent function was constructed in sliding mode observer to replace the traditional switch function, a new type of optimized fuzzy PI controller was designed on the speed loop. The control system simulation model was built, the important performance of the permanent magnet synchronous motor was compared. The results show that the tracking, robustness and rapidity of the speed control system are improved by the introduction of an improved sliding mode observer and a new optimized fuzzy PI controller. Experimental platform was built to verify the correctness and feasibility of the algorithm.

Key words: hyperbolic tangent function, new fuzzy PI controller, permanent magnet synchronous motor (PMSM), sliding mode observer