摘要
永磁同步电机存在匝间短路故障、永磁体退磁故障和偏心故障等多种故障类型,对其故障诊断的研究一直集中于单一故障,耦合故障涉及较少。以匝间短路-退磁耦合故障为例,运用有限元法分别建立电机正常条件及不同耦合故障程度的二维模型;通过瞬态磁场求解器求得空载和额定负载两种不同工况下电机在正常以及不同故障程度运行时的磁感线分布云图、转矩曲线图、相反电动势曲线图,并利用傅里叶变换对相反电动势谐波含量进行了分析。结果表明,耦合故障条件下相反电动势的三次谐波含量明显高于正常条件值,相反电动势的三次谐波含量的增加可作为判断该耦合故障的依据。
There are many types of faults,such as turn-to-turn short-circuit fault,permanent magnet demagnetization fault and eccentric fault,and the research on fault diagnosis has been focused on single fault,and the coupling fault involves less.Taking the inter-turn short circuit-demagnetization coupling fault as an example,the finite element method is used to establish the two-dimensional model of the motor normal condition and the different coupling fault degree respec-tively.The magnetic-sensing line distribution of the motor in the normal and different fault conditions is obtained by the transient magnetic field solver.The torque curve,the opposite potential curve and the inverse potential harmonic content are analyzed by Fourier transform.The results show that the three harmonic content of the opposite electric potential is obvi-ously higher than the normal condition value in the coupled fault condition,so the increase of the three harmonics of the op-posite electric potential is proposed as the basis for judging the coupling fault.
作者
王欢
郑安文
许小伟
王苏娟
雷鹏
WANG Huan;ZHENG An-wen;XU Xiao-wei;WANG Su-juan;LEI Peng(Wuhan University of Science and Technology,Wuhan 430074,China)
出处
《微特电机》
2018年第11期29-34,共6页
Small & Special Electrical Machines
基金
国家自然科学基金项目(51505345)
大学生科技创新基金(17ZRB169)
关键词
永磁同步电机
有限元法
二维模型
电磁场
耦合故障分析
permanent magnet synchronous motor
finite element method
two dimensional model
electro-magnetic field
coupling failure analysis
