表贴式与内置式无轴承永磁同步电动机电磁特性对比  

Electromagnetic Characteristics Comparison of a Surface-Mounted and an Interior Bearingless Permanent Magnet Synchronous Motors

作　　者：罗帅[1] 孙晓东[1,2] 杨泽斌[3] 李可[3] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]江苏大学汽车工程研究院,江苏镇江212013 [3]江苏大学电气信息与工程学院,江苏镇江212013

出　　处：《轴承》2017年第2期42-47,共6页Bearing

基　　金：国家自然科学基金项目(51305170;51475214);中国博士后科学基金项目(2015T80508);江苏省自然基金项目(BK20130515;BK20141301);江苏省六大人才高峰项目(2015-XNYQC-003;2014-ZBZZ-017);江苏大学高级人才科研启动基金项目(12JDG057;14JDG076);江苏高校优势学科建设工程项目

摘　　要：为探究不同转子结构对无轴承永磁同步电动机电磁特性的影响,对2台表贴式与内置式无轴承永磁同步电动机进行对比分析。2台无轴承永磁同步电动机的定子结构、绕组通入的电流、相位、永磁体产生的气隙磁密完全相同。建立了2台电动机的有限元模型,对比分析了永磁磁链、反电动势、电感、转矩以及悬浮力等静态电磁特性。有限元仿真结果表明:表贴式永磁同步电动机永磁体的用量较小,磁链谐波分量较少;内置式无轴承永磁电动机能够产生较大的电感、转矩与悬浮力。In order to explore the influence of different rotor structure on the electromagnetic characteristics of the bear- ingless permanent magnet synchronous motors （ BPMSMs）, a surface - mounted BPMSM and an interior BPMSM are compared. The surface - mounted and interior BPMSMs have the same stators, winding currents and permanent magnet air gap flux densities. The finite element models of the two BPMSMs are built. The static electromagnetic characteristics are deduced, including permanent magnet flux linkage, back - EMF, winding inductances, static torque, and radial suspension force. Finite element simulation results show that the amount of the permanent magnet in surface BPMSMs is much smaller and it has less harmonic of permanent magnet flux linkage. The interior BPMSM generates greater induct- ance, torque and suspension force.

关 键 词：无轴承永磁同步电动机 表贴式 内置式 电磁特性 有限元分析 

分 类 号：TH133.3[机械工程—机械制造及自动化] TM346[电气工程—电机]