内置式永磁同步电机退磁仿真建模及特征分析  

Demagnetization Simulation Modeling and Characteristic Analysis of Interior Permanent Magnet Synchronous Motor

作　　者：刘麦 马艳花[1] LIU Mai;MA Yanhua(Hainan Intelligent Electric Grid Equipment Engineering Research Center,Hainan College of Economics and Business,Haikou Hainan571127,China)

机构地区：[1]海南经贸职业技术学院,海南省智能电网装备工程研究中心,海南海口571127

出　　处：《汽车零部件》2020年第12期25-29,共5页Automobile Parts

基　　金：海南省高等学校科学研究资助项目(Hnky2019-88)。

摘　　要：永磁体退磁故障是内置式永磁同步电机的常见故障之一,严重威胁电机的安全可靠运行。以某电动汽车驱动电机用内置式V型永磁同步电机为例,运用有限元分析软件进行仿真建模,通过改变永磁材料的剩磁建立退磁模型,计算20%、40%、60%、80%均一退磁和正常情况下电机内部特征气隙磁通密度、空载反电动势和负载相电流,并对特征曲线进行快速傅里叶变换。仿真曲线及快速傅里叶变换结果表明,对气隙磁通密度、空载反电动势和负载电流的数据分析,可以作为不同程度退磁故障的诊断依据。Demagnetization fault of permanent magnet is one of the common faults of the built-in permanent magnet synchronous motor(IPMSM),which seriously threatens the safe and reliable operation of the motor.Taking a built-in permanent magnet synchronous motor for an electric vehicle drive motor as an example,the finite element analysis software was used for simulation modeling.The demagnetization model was established by changing the remanence of permanent magnet materials,and the internal characteristic air gap flux density,counter electromotive force and load phase current were calculated under 20%,40%,60%,80%uniform demagnetization and normal conditions.Fast Fourier transform was applied to the characteristic curve.The simulation curves and FFT results show that the data analysis of air gap flux density,counter electromotive force and load phase current can be used as the diagnosis basis of demagnetization fault in different degrees.

关 键 词：永磁同步电机 退磁 气隙磁密 反电动势 傅里叶变换 

分 类 号：U464[机械工程—车辆工程]