考虑剪切应力的空调风机用永磁同步电机噪音优化设计  

Noise Optimization of Permanent Magnet Synchronous Motor Considering Shear Stress

作　　者：于明湖 李伟 李文瑞 张玉秋 YU Minghu;LI Wei;LI Wenrui;ZHANG Yuqiu(Guangdong Welling Motor Manufacturing Comapany Limited,Foshan Guangdong 528333,China;School of Electric Power Engineering of South China University of Technology,Guangzhou Guangdong 510641,China)

机构地区：[1]广东威灵电机制造有限公司,广东佛山528333 [2]华南理工大学电力学院,广东广州510641

出　　处：《顺德职业技术学院学报》2022年第4期54-60,67,共8页Journal of Shunde Polytechnic

基　　金：国家自然科学基金(51607073)。

摘　　要：针对一款空调风机用典型永磁同步电机存在的6倍频噪音问题,对电磁噪音的产生机理进行了研究。理论和实验分析表明冲裁剪切应力使硅钢片边缘组织的磁性恶化,增加了反电势畸变率,因此对有限元模型进行了修正,并以反电势畸变率为优化目标进行了转子外廓及槽口优化。样机实测反电势波形与仿真吻合,且噪音频谱分析显示电机6倍频噪音明显降低,实现了对转矩脉动和振动噪声的有效抑制。Aiming at the problem of 6 times frequency noise of a typical permanent magnet synchronous motor (PMSM) for air-conditioning fan,the mechanism of electromagnetic noise is studied.Theoretical and experimental analysis shows that the blanking shear stress can worsen the magnetism of the edge of the steel sheet,and increase the total harmonics distortion (THD) of the back EMF.Therefore,the finite element model is modified,and the rotor profile and notch are optimized with the THD of the back EMF as the optimization goal.The measured back EMF waveform of the prototype is consistent with the simulation.The noise spectrum analysis shows that the 6 times frequency noise of the motor is significantly reduced,and the effective suppression of torque ripple and vibration noise is realized.

关 键 词：永磁同步电机 噪音优化 剪切应力 反电势畸变率 

分 类 号：TM341[电气工程—电机]