摘要
双面转子永磁同步电机具有功率密度高、恒功率运行范围宽与低速大转矩输出能力强的特点。电机在大转矩输出与高速恒功率运行时电流会导致双层气隙磁场分布畸变,易引发较大的电磁振动噪声。该文基于一台85kW双面转子永磁同步电机,首先对双层气隙磁场分布规律进行分析,通过引入偏移因子提出一种基于内、外电枢齿偏移削弱电机振动噪声的方法,推导出电枢齿偏移电磁激振力波的解析表达式,总结出电磁激振力波的变化规律。然后借助有限元平台对比分析内、外电枢齿偏移前后振动响应频谱与噪声特性,结果证明所提方法可以有效削弱电机的振动噪声。最后对样机主要噪声分布工作点进行测试,测试结果与解析计算及仿真分析结果相符,验证了所提的双面转子永磁同步电机振动噪声分析与削弱方法的准确性,为该类电机振动噪声的计算分析与识别抑制提供参考。
The dual sided rotor permanent magnet synchronous motor(DSR_PMSM)has the characteristics of high power density,wide operating range of constant power and strong output capacity of low speed high torque.The operation current at high torque output and constant power weak magnetic will catastrophe air-gap magnetic field distribution,which may cause large electromagnetic vibration noise.The paper is based on an 85kW DSR_PMSM,the magnetic fields harmonic distribution were studied and analyzed,a new method to reduce vibration noise based on internal and external armature teeth migration is proposed.The analytical expressions electromagnetic excitation force wave(EEFW)of armature teeth was derived.With the help of finite element analysis platform,the distribution of EEFW on armature was obtained.The vibration response spectrum and electromagnetic noise characteristic were obtained by simulating the vibration response and sound field.The test results are close to analytical analysis and simulation results,which verified the accuracy of vibration noise analysis and calculation method of DSR_PMSM given in this paper.It provides reference for the calculation_analysis and identification_inhibition of vibration noise for this type machine.
作者
刘凯
张炳义
冯桂宏
Liu Kai;Zhang Bingyi;Feng Guihong(School of Electrical Engineering Shenyang University of Technology Research Institute of Special Motor and Control, Shenyang 110870 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2021年第S01期95-106,共12页
Transactions of China Electrotechnical Society
关键词
双面转子
振动噪声
电枢齿偏移
永磁同步电机
Dual sided rotor
vibration and noise
armature teeth migration
permanent magnet synchronous motor(PMSM)
