端环断裂引发电机电磁性能及振动变化规律的研究  

Research on Electromagnetic Performances and Vibration Variation of Induction Motor With Broken End Rings

作　　者：谢颖[1] 郭金鹏[1] 黎志伟 陈鹏 XIE Ying;GUO Jinpeng;LI Zhiwei;CHEN Peng(School of Electrical & Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,Heilongjiang Province,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江省哈尔滨市150080

出　　处：《中国电机工程学报》2019年第6期1803-1814,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51107022);黑龙江省杰出青年科学基金(JC2016010)~~

摘　　要：针对笼型感应电机运行过程中出现的端环断裂问题,研究端环故障对电机电磁性能及电磁振动的影响,旨在从电磁性能和电磁振动角度找出端环断裂故障的诊断方法。以一台笼型感应电机为例,建立三维有限元电磁计算模型,采用时步有限元法,计算电机额定工况时的三维瞬态电磁场,分析故障前后电机磁场分布的变化,并研究故障对电机运行性能的影响。基于三维电磁计算结果,结合麦克斯韦应力方程,计算正常和故障电机气隙中的电磁力,并以电磁力为载荷条件,对电机进行电磁振动的计算。仿真及实验结果均表明,通过对定子电流和电磁振动信号的分析,可以提取电机故障特征量,为工程实际提供参考。In order to solve the issue of broken end rings during the operation of squirrel-cage induction motors,the influences of broken end rings on electromagnetic performances and vibration were discussed,to find out the diagnosis method of end-ring faults from electromagnetic property and vibration.Firstly,the 3 D finite element models were established for cases of an induction motor.Under rated load,the transient magnetic fields were calculated by time-stepping coupled with the finite element method,and the effect of the broken end ring on the motor electromagnetic field was analyzed.Then,based on the results of the 3 D transient magnetic field,electromagnetic forces in the air gap of the normal and fault motors were calculated by the Maxwell stress equations.Taking electromagnetic forces as the load condition,the electromagnetic vibration was calculated.The simulation and experimental results show that the fault characteristic of the motor can be extracted,which provides a reference for the engineering practice,by the analysis of stator currents and electromagnetic vibration signals.

关 键 词：感应电机 端环断裂 电磁场 电磁振动 

分 类 号：TM343[电气工程—电机]