永磁电机转子偏心的气隙磁场和电磁力分析  

Analyses on Air-Gap Magnetic Field and Electromagnetic Force of Permanent Magnet Motor with Eccentric Rotor

作　　者：杨国龙 Yang Guolong(Zhanjiang Preschool Education College,Zhanjiang 524000,China)

机构地区：[1]湛江幼儿师范专科学校,广东湛江524000

出　　处：《防爆电机》2023年第6期22-26,57,共6页Explosion-proof Electric Machine

基　　金：广东省普通高校青年创新人才类项目(自然科学类)(2021KQNCX240)。

摘　　要：永磁电机转子偏心是常见的电机故障类型之一,若永磁电机出现不同程度的偏心,则会引起气隙不均匀,改变气隙磁场分布,从而影响永磁电机的电磁性能。以一台48槽8极内嵌永磁体(IPM)永磁同步电机(PMSM)为例,基于ANSYS Maxwell建立该款电机的二维有限元模型,通过有限元仿真分析PMSM转子偏心对气隙磁场和电磁力波的影响,包括定、转子磁场波形和谐波磁场、额定负载时径向电磁力波形及其谐波的影响。最后,利用电磁力波表与径向电磁力有限元计算结果对比,验证了有限元分析的正确性。研究永磁电机偏心对电机的电磁性能影响提供了理论基础,在工程实践上具有一定的参考价值。The rotor eccentricity of permanent magnet motor is one of the common motor faults.If the permanent magnet motor appear the eccentricity in different degrees,it will cause uneven air gap,change the distribution of air-gap magnetic field,and then affect the electromagnetic performance of the motor.Taking a 48-slot 8-pole permanent magnet synchronous motor(PMSM)with inside-embedded permanent magnet(IPM)as an example,a 2D finite-element model of the motor was established based on ANSYS Maxwell,and the influences of PMSM rotor eccentricity on air-gap magnetic field and electromagnetic force wave were analyzed by finite-element simulation,such as the stator and rotor magnetic field waveforms and harmonic magnetic field as well as the radial electromagnetic force waveform and its harmonic influences under the rated load.Finally,the correctness of finite-element analysis was verified by comparing the electromagnetic force wave table with the radial electromagnetic force finite-element calculation results.This paper provides a theoretical basis of studying the influence of rotor eccentricity on the electromagnetic performance of permanent magnet motor,which has a certain reference value in engineering practice.

关 键 词：永磁电机 转子偏心 气隙磁场 电磁力 

分 类 号：TM351[电气工程—电机]