基于改进趋近率的感应电机分数阶滑模磁链观测器设计

Design of fractional order sliding mode flux observer for induction motor based on improved reaching rate

针对高性能感应电机控制中的磁链观测问题,设计了一种基于改进Faln函数趋近律的分数阶积分转子磁链滑模观测器,滑模观测器采用分数阶积分滑模面和改进的Faln函数为趋近函数,并通过该磁链观测器进行了转速估计。仿真试验表明:改进趋近律的分数阶积分滑模观测器有效提高了观测精度和动态响应性能,抑制了滑模观测中的抖振,通过该磁链观测器的速度估计精度较高。

Aiming at the problem of flux observation in high performance control of induction motor,a fractional order integral rotor flux sliding mode observer based on the improved law with Faln function is designed.Fractional-order integral sliding surface and improved Faln function are used as approximation function in sliding-mode observers.And rotating speed is estimated through the flux observer.Simulation results show that the fractional order integral sliding mode observer with improved reaching law can effectively improve the observational precision and dynamic response performance.And chattering in sliding mode observations is suppressed,precision of speed estimation through flux observer is high.