新型交替极永磁游标电机的优化设计与分析

为解决适用于低速场合的永磁游标电机永磁体极数多的问题,通过提高电机的输出性能,提出一种新型交替极永磁游标电机拓扑。通过有限元法对比4种不同的励磁永磁体配置,研究Halbach阵列增强交替极电机输出性能的方式;针对齿槽转矩与输出转矩,对电机的结构参数进行优化设计;最后,分析该电机的电磁性能、气隙磁密和谐波分布。仿真结果表明:与传统交替极电机相比,该新型交替极永磁游标电机在反电势、气隙磁密、齿槽转矩、输出转矩和电机效率上有较好的性能,适用于低速大转矩的应用场合。

Optimal design and analysis of a new consequent-pole permanent magnet vernier motor

To modify the disadvantages of permanent magnet vernier motor and improve the output performance,a new consequent-pole permanent magnet vernier motor has been proposed.The way that Halbach array enhanced consequent-pole motor output performance was studied by comparing four different permanent magnet configurations based on finite element method.The structure parameters were optimal designed to improve cogging torque and output torque.And the electromagnetic performance,the air gap flux density and the harmonics distribution decomposed by Fourier transform were analyzed respectively.The simulation results show that,compared with the traditional consequent-pole motor,the new consequent-pole permanent magnet vernier motor has better performance in back EMF(Electromotive Force),air gap flux density,cogging torque,output torque,and efficiency,and it is suitable for low speed and large torque applications.