高速电机转子永磁体形状和转子材料对转子受力的影响分析  

Analysis of Rotor Permanent Magnet Shape and Rotor Material Influence of High-speed Motor Rotor Stresses

作　　者：吴文坤 王泊涵 曹力 禹业通 施道龙 卓亮 WU Wenkun;WANG Bohan;CAO Li;YU Yetong;SHI Daolong;ZHUO Liang(Guiyang Aerospace Linquan Motor Co.,LTD.,Guiyang 550000,China)

机构地区：[1]贵州航天林泉电机有限公司,贵阳550000

出　　处：《微电机》2024年第4期1-5,32,共6页Micromotors

基　　金：无刷直流起动电机系列型谱,项目号(2110WZ0002)。

摘　　要：永磁体开裂是外转子永磁同步电机的常见故障。为研究永磁体开裂的原因并提出解决方案,本文考虑永磁体形状、永磁体和磁轭材料配合对电机转子各部分受力的影响,并对电机转子进行力学分析。结果表明,瓦形磁体的应力分布优于矩形磁体。磁体和磁轭材料配合为DT4/N35(EH)时,安全余量最高,达到56.41%。当材料配合为DT4/SmCo28时,永磁体最大应力超过屈服强度22.38%,导致永磁体出现裂纹。本文研究结果对于外转子电机的结构设计和电机的安全可靠运行具有重要的参考意义。Permanent magnet cracking is a common failure of external rotor permanent magnet synchronous motors.In order to study the causes of permanent magnet cracking and propose solutions,the influence of permanent magnet shape,permanent magnet and yoke material fit on the stresses on each part of the motor rotor was considered in this paper,and the motor rotor was mechanically analyzed.The results show that the stress distribution of tile-shaped magnets is better than that of rectangular magnets.The highest safety margin of 56.41%is achieved when the magnet and yoke material fit is DT4/N35(EH).When the material fit is DT4/SmCo28,the maximum stress in the permanent magnet exceeds the yield strength by 22.38%,resulting in permanent magnet cracking.The results of this paper are of great reference significance for the external rotor motor structural design and motor safe and reliable operation.

关 键 词：永磁体开裂 安全裕度 应力分析 

分 类 号：TM355[电气工程—电机] TM351