永磁同步电机转子结构优化设计

Optimal Design of Rotor Structure for Permanent Magnet Synchronous Motor

为降低内置式永磁同步电机输出转矩脉动,研究了一种采用折线形永磁体,转子铁心表面采用分段圆弧结构,并在圆弧连接点处开角形槽的转子优化设计方法。介绍了转子的拓扑结构,并对磁场及齿槽转矩进行了解析分析;利用Maxwell 2D软件分析了反电动势谐波与齿槽转矩分布情况;采用Taguchi法确定关键参数的最佳取值组合,并与传统“一”形结构电机性能进行对比。仿真结果表明,该优化设计方法能有效降低内置式永磁同步电机的输出转矩脉动。

To reduce the torque ripple of interior permanent magnet synchronous motor(IPMSM),permanent magnets with fold line shape were designed.The surface of rotor consists of two different arcs and the slots were opened at the connection of arcs.The topology of rotor was introduced.The magnetic field and the cogging torque were analytically analyzed.Maxwell 2D was used to analyze the harmonics and cogging torque.Taguchi method was used to design the values of parameters and the characteristics were compared with the conventional PMSM.The result indicates that the optimal design can effectively reduce torque ripple in IPMSM.