基于振动信号分析的感应电机气隙偏心故障诊断  

Air Gap Eccentricity Fault Diagnosis of Induction Motor Based on Vibrational Analysis

作　　者：常悦[1] 徐正国[1] 

机构地区：[1]浙江大学工业控制技术国家重点实验室,杭州310027

出　　处：《上海应用技术学院学报（自然科学版）》2015年第2期135-138,共4页Journal of Shanghai Institute of Technology: Natural Science

基　　金：国家自然科学基金资助项目(61473254;61134001);国家高技术研究发展计划资助项目(2012AA06A404)

摘　　要：电机的偏心故障会引起气隙磁场不均匀,由电磁感应理论可知,不平衡的磁场作用在定转子上会产生不平衡磁拉力,使电机发生异常振动,故电机的振动信号可间接反映内部磁场变化,进而有利于判断电机内部是否发生气隙偏心故障.主要分析了振动信号与偏心故障间的关系,先分析电机气隙大小对磁场的影响,计算出振动作用力大小;再通过故障模拟平台测得数据对理论分析得出的故障特征频率进行验证;总结了气隙偏心故障与电机机械振动现象间的关系.The asymmetrical fault in the machine can affect air-gap magnetic field to induce unbalanced magnetic pull, which lead to abnormal vibration. Thus, the vibration signal can be used to diagnose whether air gap eccentricity fault happens or not. The vibration signal spectrum of mixed eccentric three- phase induction motor was analyzed in detail. First, the variation of the air-gap magnetic field and vibration signals in abnormal situation was analyzed. Then, the results of the experiment validated the analysis and revealed the relationship between the electric rotor vibration and the air gap eccentricity fault.

关 键 词：感应电机 气隙偏心故障 振动 

分 类 号：TM346[电气工程—电机]