永磁同步发电机失磁故障振动场研究  

Research on Vibration Field of PMSG Demagnetization Fault

作　　者：朱英杰 李翔峰 宁穆怡 张志艳 贾宛英 ZHU Yingjie;LI Xiangfeng;NING Muyi;ZHANG Zhiyan;JIA Wanying(Nanjing Electric Power Design Institute Co.,Ltd.,Nanjing 210009,China;School of Electrical and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)

机构地区：[1]南京电力设计研究院有限公司,江苏南京210009 [2]郑州轻工业大学电气信息工程学院,河南郑州450002

出　　处：《机械与电子》2025年第3期16-21,28,共7页Machinery & Electronics

基　　金：河南省科技攻关项目(242102241030,222102320074)。

摘　　要：永磁同步发电机(PMSG)易受工作环境影响发生失磁故障,致使其运行在非正常状态。以1台1 kW、12极的PMSG为样机,对不同失磁故障工况的振动场进行研究。首先,推导了PMSG失磁故障下电磁场径向电磁力和振动场辐射噪声的数学模型,设置了不同程度失磁故障方案。其次,建立了PMSG二维电磁场仿真模型,分析了气隙磁密分布,求解了径向电磁力。最后,建立了PMSG三维振动场仿真模型,以径向电磁力为激励,得到了不同程度失磁故障的形变幅值、振动速度和等效辐射声功率。仿真结果表明:PMSG永磁体单块失磁故障时,径向电磁力畸变程度、振动速度和等效辐射声功率幅值均最大;永磁体对称失磁时,振动噪声接近于正常工况;永磁体均匀失磁时,振动噪声幅值最低。Permanent Magnet Synchronous Generator(PMSG)is susceptible to demagnetization faults caused by the working environment,resulting in abnormal operation.This paper takes a 1 kW,12 pole PMSG as a prototype to study the vibration field under different demagnetization fault conditions.Firstly,a mathematical model is derived for the radial electromagnetic force and radiated noise of the electromagnetic field and vibration field under the PMSG demagnetization fault,and the different degrees of demagnetization fault schemes are set up.Secondly,a two dimensional electromagnetic field simulation model of the PMSG is established to analyze the distribution of air gap magnetic density and solve the problem of radial electromagnetic force.Finally,a three dimensional vibration field simulation model of the PMSG is established,and radial electromagnetic force is used as the excitation to obtain the deformation amplitude,vibration velocity and equivalent radiated sound power of different demagnetization faults.The simulation results show that when it comes to the single permanent magnet demagnetization fault of the PMSG,the degree of radial electromagnetic force distortion,vibration velocity,and equivalent radiated sound power amplitude are all maximized;when it comes to the permanent magnet demagnetization symmetry fault of the PMSG,the vibration noise is close to normal operating conditions;when the permanent magnet of the PMSG is uniformly demagnetized,the amplitude of vibration noise is the lowest.

关 键 词：永磁同步发电机 失磁故障 振动场 等效辐射声功率 

分 类 号：TM341[电气工程—电机]