无轴承永磁电动机有限元分析及结构优化设计  

Finite Element Analysis and Structural Optimization Design of Bearingless Permanent Magnet Motors

作　　者：张文跃[1] 杨均悦[1] 葛研军[1] 

机构地区：[1]大连交通大学,辽宁大连116028

出　　处：《微特电机》2011年第2期22-26,共5页Small & Special Electrical Machines

基　　金：大连市科技计划项目(2007A12GX019);辽宁省科学计划项目(2010220004)

摘　　要：针对无轴承永磁电动机内部磁场复杂、磁路计算时经验参数多、设计计算误差较大等问题,基于AN-SYS对无轴承永磁电动机进行了电磁场有限元分析和结构优化设计,验证了无轴承永磁电动机的悬浮原理和悬浮力模型,分析了永磁体厚度、极弧系数和气隙长度对径向悬浮力的影响,以及极弧系数对气隙磁密畸变率的影响,以获得最大悬浮力和最小气隙磁密畸变率为目标,结合实际情况得出了无轴承永磁电动机的最佳结构参数。The internal magnetic field is very complicated in a bearingless permanent magnet motor（BPM）.Using the traditional way,lots of errors are produced,since many empirical parameters are introduced in calculating the magnetic circuit.Hence the method of finite element analysis was adopted here to verify its suspension principle and model of suspension force.Furthermore,in order to obtain the optimum structure,the influences of permanent magnet thickness,pole-arc coefficient and air gap length on radial levitation force were analyzed respectively,as well as the influence of pole-arc coefficient on air-gap magnetic flux intensity.Finally,taking the maximum radial levitation force and the minimum aberration rate of air-gap magnetic flux intensity as design goals,the optimum structural parameters of the BPM were obtained in accordance with the actual condition.

关 键 词：无轴承电动机 永磁电动机 电磁场有限元分析 结构优化设计 

分 类 号：TM352[电气工程—电机]