基于解析法和有限元法的PMSM电磁力波分析  

Analysis of Electromagnetic Force Wave of Permanent Magnet Synchronous Motor Based on Analytical Method and Finite Element Method

作　　者：王伟[1] 黄开胜[1] 杜晓彬 WANG Wei;HUANG Kai-sheng;DU Xiao-bin(Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学

出　　处：《微特电机》2019年第8期28-34,共7页Small & Special Electrical Machines

摘　　要：针对一款现代纺织用48槽8极整数槽永磁同步电动机(PMSM)进行磁场谐波理论和径向力波分析。采用解析法对合成气隙磁场、定子电枢绕组磁场、转子永磁体磁场进行谐波分析。利用解析模型与有限元模型的结合,对比分析了径向电磁力波次数,并设计了基于Python的预处理程序。在完全去解析化的情况下采用有限元法分析了电磁力波的幅值和频率。通过对径向电磁力波空间和时间分布上的进一步仿真,得出与力波次数表相同的谐波极对数,以及具体的力波幅值和频率。通过两者数据对比,验证了有限元法的正确性,同时可以快速、直观地定量分析电磁力波的幅值和频率,误差较小;清楚地观察径向电磁力波空间和时间分布的波动程度及波动位置,为初步判断电机电磁振动噪声的影响程度和后续减振降噪的优化设计奠定了基础。A modern textile integer slot permanent magnet synchronous motor(PMSM)with 48 slots and 8 poles was analyzed in the magnetic field harmonic theory and radial force wave.The synthetic air-gap magnetic field,the stator armature winding magnetic field and the rotor permanent magnet magnetic field were performed by the analytical method in the harmonic analysis.Using the combination of analytical model and finite element model,the numbers of radial electromagnetic force wave were compared and analyzed,also a Python-based preprocessor was designed.The finite element method was used to analyze the amplitude and frequency of the electromagnetic force wave in the case of complete de-analysis.Through the further simulation on the spatial and time distribution of the radial electromagnetic force wave,the same number of harmonic pole pairs as the force wave number table was obtained,as well as the specific amplitude and frequency of the force wave.The correctness of the finite element method was verified by the comparison of the data of the two methods.The amplitude and frequency of the electromagnetic force wave can be analyzed quantitatively and quickly,and the error was minimal.The degree and position of the fluctuations on the spatial and time distribution of the radial electromagnetic force wave were clearly observed,which laid the foundation for the preliminary determination of the degree of influence of the electromagnetic vibration noise of the motor and the optimization design of the subsequent vibration damping and noise reduction.

关 键 词：永磁同步电动机 整数槽 解析法 谐波分析 电磁力波 有限元法 

分 类 号：TM341[电气工程—电机] TM351