车用发电机定子绕组匝间短路故障下转子弯扭耦合振动特性分析  

Characteristics of bending and torsion coupled vibration of vehicle generator rotor under inter-turn short circuit fault of stator windings

作　　者：许小伟[1] 王红霞 严运兵[1] 王维强[1] Xu Xiaowei;Wang Hongxia;Yan Yunbing;Wang Weiqiang(College of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430065

出　　处：《武汉科技大学学报》2018年第6期446-452,共7页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(51505345)

摘　　要：运用数值积分法,在建立发电机转子系统弯扭耦合振动模型基础上,考虑定子绕组匝间短路故障时发电机转子弯曲及扭转电磁刚度的影响,对不同程度匝间短路故障下转子的弯曲及扭转振动特性进行分析。结果表明,发电机定子匝间短路故障不仅会使转子弯曲和扭转振动加强,还会增加转子弯振和扭振中的倍频及高倍频成分;随短路程度加大,弯振的1、3、5等奇数次倍频振动量与扭振的2、4等偶数次倍频振动量逐渐增加,且弯振中1倍频振动量最大,扭振中2倍频振动量变化最为显著。By using numerical integration method,constructing the bending-torsion coupled vibration model for vehicle generator rotor system,and considering the influence of bending and torsional electromagnetic stiffness of stator when stator windings inter-turn short circuit fault occurs,the characteristics of bending and torsional vibration of generator rotor under different levels of inter-turn short circuit faults were investigated.The results show that,the stator inter-turn short circuit fault not only strengthens bending and torsional vibration of the rotor,but also increases the doubling and high frequency components in the bending and torsional vibration.With increased level of short circuit fault,the bending vibration components at 1,3,5 and other odd times frequencies as well as torsional vibration components at 2,4 and other even times frequencies gradually increase.Moreover the bending vibration component at 1 time frequency is the largest,and torsional vibration component at 2 times frequency changes most obviously.

关 键 词：车用发电机 发电机转子 弯扭耦合 振动特性 匝间短路 电磁刚度 

分 类 号：TM307[电气工程—电机]