永磁同步电动机永磁体故障下电磁振动特性研究  

Study on the electromagnetic vibration characteristics of permanent magnet synchronous motor under permanent magnet fault

作　　者：成豪杰 唐旭 马兆兴 王瑞华 CHENG Haojie;TANG Xu;MA Zhaoxing;WANG Ruihua(School of Information and Control Engineering,Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]青岛理工大学信息与控制工程学院,青岛266525

出　　处：《青岛理工大学学报》2024年第5期132-141,共10页Journal of Qingdao University of Technology

基　　金：山东省自然科学基金资助项目(ZR2020ME194,ZR2018BEE031)。

摘　　要：针对永磁同步电动机永磁体缺失对电磁振动的影响,分析了永磁同步电动机永磁体、绕组电流基波和绕组电流谐波共同作用下的磁动势分布情况,建立了电机永磁体缺失下的径向电磁力解析分析模型,分析了电机正常状态和永磁体缺失故障下的电磁力特性。搭建了电机永磁体缺失故障时电机本体和变参数矢量控制的联合仿真模型,分别仿真验证了永磁同步电机无故障和故障时三相电流和径向电磁力的特性变化。结果表明:故障状态下电机定子绕组电流基波幅值大于无故障时的基波幅值,两种状态下绕组电流的频率成分相同;正常状态下电机的径向电磁力阶次主要为电机极数2 p的整数倍,故障下电机会附加产生低阶的径向电磁力;正常状态下径向电磁力的主要频率为电源频率f_(1)的偶数倍,电机发生永磁体缺失故障后原有阶次的电磁力频率成分不会发生变化,故障状态下新出现的阶次为r_(1)的低阶电磁力的主要频率成分为(2k±r_(1)/p)f_(1),k=0,1,2,3,…。Aiming at the influence of permanent magnet absence on electromagnetic vibration of permanent magnet synchronous motor,the distribution of magnetomotive force under the joint action of permanent magnet,fundamental wave of winding current and harmonic of winding current is firstly analyzed.The analytical analysis model of radial electromagnetic force under permanent magnet absence of motor is then established,and the electromagnetic force characteristics under both normal state and permanent magnet absence fault are analyzed.Then,the co-simulation model of the motor and variable parameter vector control is built under permanent magnet absence fault,and the variation of three-phase current and radial electromagnetic force characteristics of the motor without fault and with fault are simulated and validated,respectively.The results show that the amplitude of fundamental wave of stator winding current under fault condition is greater than that without fault,and the frequency components of winding current are the same under both conditions.Under normal condition,the order of the radial electromagnetic force of the motor is mainly an integer multiple of the motor pole number 2 p.Under fault condition,the motor will additionally generate low-order radial electromagnetic forces.The main frequency of the radial electromagnetic force under normal condition is an even number of times of the power supply frequency f_(1).The frequency components of the electromagnetic force with the original order will not change after the motor has permanent magnet absence fault.Under fault condition,the main frequency component of the new low-order electromagnetic force with the order of r_(1) is(2k±r_(1)/p)f_(1),k=0,1,2,3,….

关 键 词：永磁体故障 径向电磁力 电流谐波 矢量控制 有限元分析 

分 类 号：TM351[电气工程—电机]