外转子无铁心无轴承永磁同步电机参数优化设计  

Optimization Design of Outer Rotor Coreless Bearingless Permanent Magnet Synchronous Motor

作　　者：沈舒楠 朱熀秋[1] SHEN Shunan;ZHU Huangqiu(School of Electrical and Information Engineering of Jiangsu University,Zhejiang Jiangsu 212013,China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《微电机》2021年第5期20-26,共7页Micromotors

基　　金：国家自然科学基金(61973144),江苏省重点研发计划(BE2016150)。

摘　　要：为解决飞轮储能用电机齿槽转矩大,高速运行时铁心损耗高的问题,提出一种外转子无铁心无轴承永磁同步电机。首先阐述了外转子无铁心无轴承永磁同步电机的基本结构和工作原理,然后给出了电机的基本设计参数,接着采用Taguchi法以平均转矩、平均悬浮力、转矩脉动和悬浮力脉动为评价标准优化了极弧系数、永磁体厚度、气隙长度和转子厚度,接着通过有限元仿真对比了优化前后电机性能的变化。仿真结果显示,优化后的平均转矩和平均悬浮力分别提高了15.7%和8.44%,转矩脉动和悬浮力脉动分别降低了0.65%和1.83%。最后,通过实验证明了优化后电机能够稳定运行并且相较于传统的有铁心电机运行稳定性更好。In order to solve the problem of high cogging torque and high core loss in high speed operation of flywheel energy storage electric machine,a kind of outer rotor coreless bearingless permanent magnet synchronous motor(ORCBPMSM)was proposed.Firstly,the basic structure and working principle of the proposed motor was expounded,then the basic design parameters of the motor were given.Then,the Taguchi method was used to optimize the polar arc coefficient,permanent magnet thickness,air gap length and rotor thickness with the evaluation criteria of average torque,average suspension force,torque ripple and suspension force ripple.After that,the change of motor performance before and after optimization was compared by finite element simulation.The simulation results show that the optimized average torque and average suspension force increase by 15.7%and 2.78%,respectively,and the torque ripple and suspension force ripple decrease by 15.2%and 3.22%,respectively.Finally,experiments show that the optimized motor can run stably and is better than the traditional core motor.

关 键 词：无轴承永磁同步电机 无铁心 外转子 Taguchi法 

分 类 号：TM351[电气工程—电机] TM341