基于双幂次趋近律的感应电机控制设计与仿真研究

摘要

为了提高感应电机矢量控制转速环中转速控制的跟踪性能和抗干扰性能，提出一种用于转速控制的基于双幂次趋近律的滑模控制器设计方法。采用比例积分滑模面减小转速稳态静差。通过双幂次趋近律实现快速跟随转速指令。用双曲正切函数来减小抖振现象。同基于传统比例速度控制器的对比仿真表明，所提出控制器使转速控制不仅获得了较快的跟踪性能和较好的抗干扰性能，而且没有明显抖振现象。%In order to improve the tracking performance and robustness of a field-oriented vector control of induction motor, a method of double power reaching law-based sliding mode controller is designed for velocity control in speed loop. The proportional-integral sliding surface is adopted to reduce steady-state error of velocity control. The fast tracking performance is achieved by the double power reaching law. Hyperbolic tangent function is used to reduce the chattering. The simulation comparison with traditional proportional controller of velocity control shows that the system has good tracking performance and good robustness, and has no obvious chattering phenomenon.