基于双模糊控制器的永磁同步电机混沌与稳定性研究

在分析永磁同步电机电机参数变化导致定子磁链观测器输出误差变化的基础上,研究了永磁同步电机在一定工作情况下呈现混沌运动,根据PMSM的数学模型得出其混沌特性曲线.由于常规的直接转矩控制大多采用滞环比较器,容易产生转矩脉动,导致逆变器开关频率过高;与此同时,常规的PI速度调节器的跟踪精度不高;鉴于此,采用双模糊控制器建立了具有混沌特性的永磁同步电机模型.仿真结果证明:永磁同步电机直接转矩控制系统双模糊控制对其混沌特性具有良好的控制效果,系统的动态和静态性能也得到改善,可以减少转矩和磁通纹波,并能提高系统的响应速度.

Study on chaos and stability of permanent-magnet synchronous motors based on double fuzzy controller

The chaotic phenomena of a permanent magnet synchronous motor (PMSM) under certain circumstances were studied based on the error analysis of the stator flux observer output by parameter change of the permanent magnet synchronous motor,PMSM model with chaotic features was built,and the chaotic curves were gained based on PMSM mathematic model. A dual fuzzy controller was designed for the direct torque control (DTC) system of the PMSM. The simulation results prove that control effect on the chaotic phenomenon of the PMSM-DTC system by the dual fuzzy control is good,and the dynamic and static performances of the PMSM-DTC system will be improved. Also the ripple of torque and flux can be reduced and the response speed can be improved.