中国电机工程学报2012，Vol.32Issue(9)：109-115,7.
大型感应电动机单相短路故障动态力计算
Dynamic Electromagnetic Force Calculation for Single-phase Short Circuit Fault of Large Induction Motors
摘要
Abstract
ABSTRACT： Considering the facts that the single phase short-circuit fanlt of large induction motors may cause insulation damage, rotor damage and other problems, the dynamic changes of the local electromagnetic force and electromagnetic force wave are quantitatively calculated when failure occurs in this paper. A 2-D field-circuit-motion mathematical model of dynamic electrical magnetic force calculation for large induction motors, which combined the time-stepping finite element method and the Maxwell stress method, were presented. Based on the model, the dynamic changes of the magnetic stress of the teeth key points were calculated. Meanwhile, on the basis of analysis of air-gap flux variation features when single phase short-circuit fault occurs, the 3-D dynamic distribution map of the rotor radial and tangential magnetic force wave were given. The calculation results indicate that the forces acting on different key points of the tooth are much different when single phase short-circuit fault occurs, and the maximum magnitude value of the radial and the tangential electromagnetic force wave are about 2.4 and 2.7 times as high as the normal states. The conclusion of this paper can provide reference for optimization, fault diagnosis and practical application of large induction motors.关键词
大型感应电动机/单相短路/动态力：麦克斯韦应力法/有限元分析Key words
large induction motor/single-phase shortcircuit/dynamic force/Maxwell tensor method/finite elementanalysis分类
信息技术与安全科学引用本文复制引用
梁艳萍,刘金鹏,陈晶..大型感应电动机单相短路故障动态力计算[J].中国电机工程学报,2012,32(9):109-115,7.基金项目
“十一五”国家科技支撑计划重大项目（2008BAF34804）. （）
