孙丽华 孙会琴 郭英军 王忠杰 井成豪

摘 要：為降低永磁同步电机径向电磁力所引起的电磁振动噪声，基于电磁场、结构场以及声场有限元分析方法，提出了一种基于隔磁磁桥偏移的优化方法。以一台车用内置径向式永磁同步电机为研究对象，将电机隔磁磁桥所在位置沿转子外径的圆周轨迹向磁极方向偏移，同时对隔磁磁桥相邻间距与隔磁磁桥长度进行优化，在综合考虑电机振动噪声水平与电机性能的前提下，对偏移距离为4 mm时电机优化前后的径向电磁力、转子受力、电机模态和电磁振动噪声进行了仿真分析。结果表明，所提方法使电机的平均电磁振动噪声降低了16.77%，电机的噪声水平得到了明显改善，但不会对电机的性能产生较大影响。基于隔磁磁桥偏移的优化方法改善了电机噪声水平，可为车用永磁同步电机的优化设计和电磁振动噪声的抑制提供参考。

关键词：电机学;永磁同步电机;电磁振动噪声;隔磁磁桥;纹波转矩含量

中图分类号：TM351   文献标识码：A

DOI：10.7535/hbkd.2022yx01003

收稿日期：2021-09-20;修回日期：2021-12-08;责任编辑：冯 民

基金项目：河北省科技厅重点研发计划项目（20314501D）

第一作者简介：孙丽华（1965—），女，河南卫辉人，副教授，主要从事电力系统、电机电器设计及其优化控制方面的研究。

E-mail：slhkd@163.com

Optimal design of vibration reduction of interior radial permanent magnet synchronous motor for vehicle

SUN Lihua，SUN Huiqin，GUO Yingjun，WANG Zhongjie，JING Chenghao

（School of Electrical Engineering，Hebei University of Science and Technology，Shijiazhuang，Hebei 050018，China）

Abstract：In order to reduce the electromagnetic vibration noise caused by the radial electromagnetic force of permanent magnet synchronous motor，an optimization method based on magnetic bridge offset was proposed based on the finite element analysis method of electromagnetic field，structure field and acoustic field.Taking an interior radial permanent magnet synchronous motor for vehicle as the research object，the position of the magnetic isolation bridge of the motor was shifted to the magnetic pole direction along the circumferential track of the outer diameter of the rotor，and the adjacent distance between the magnetic isolation bridge and the length of the isolation magnetic bridge were optimized.The offset distance of the magnetic bridge was set as 4 mm considering the vibration noise level and the performance of the motor.The radial electromagnetic force，rotor force，motor modal and electromagnetic vibration noise were simulated and analyzed before and after the motor optimization.The results show that the average electromagnetic vibration noise of the motor can be reduced by 16.77% by this optimization method，the noise of the motor can be effectively reduced，but it has little impact on the performance of the motor.The optimization method based on the magnetic bridge offset can improve the motor noise level，which provides some reference for the optimal design of permanent magnet synchronous motor and the suppression of electromagnetic vibration noise for vehicle.

Keywords：

electrical machinery;permanent magnet synchronous motor;electromagnetic vibration noise;magnetic isolation bridge;ripple torque content

内置式永磁同步电机（IPMSM）的交轴电感Lq与直轴电感Ld二者相差较大，所以具有较大的凸极率[1]。根据交、直轴磁阻不对称特点所产生的磁阻转矩，可以有效提升电机的过载能力及功率密度，而且易于实现弱磁调速功能，扩大其恒功率运行范围，受到新能源汽车驱动电机领域的一致认可。……