异步电动机三闭环模糊PI矢量控制方法研究

针对异步电动机矢量控制因电动机参数和负载变化使其性能变差的问题,设计了转矩环、磁链环、转速环三闭环模糊PI矢量控制系统。以速度误差和速度误差变化率作为模糊控制器的输入,大偏差时采用模糊控制,小偏差时采用PI控制。仿真结果表明,相比于传统的矢量控制系统,三闭环模糊PI矢量控制系统具有良好的动、静态性能以及较强的鲁棒性。

Study of Three Close Loop Fuzzy-PI Vector Control Method of Asynchronous Motor

Three close loops fuzzy PI vector control system based on torque loop,flux loop and speed loop is designed to solve the problem that the performance of vector control system gets worse when parameter of motor and load change.Tak-ing speed error and speed error derivative as the input of fuzzy controller,fuzzy control strategy is adopted when the speed error is big and PI strategy is adopted when the speed error is small.The simulation results show that three close loops fuzzy PI vector adaptive control system has good dynamic performance,steady-state precision and strong robustness compared with traditional vector control system.