双Y型三相异步电动机不对称运行故障过程的瞬态分析

为了准确判断双Y型三相异步电动机不对称运行的故障过程，依据电机不对称理论，借助ANSYS有限元分析软件，建立双Y型三相异步电动机的仿真模型，验证了定子绕组不对称时三相电流异常的特性，分析了电阻不对称率对电机运行特性的影响，讨论了电机运行故障的三种工况。结果表明，由绕组不对称导致的三相电流异常是循环放大的，且三相电流的幅值和相角不对称程度随着故障程度的增大而增大。

Transient Analysis of Asymmetrical Operation Fault Process of Double-Y-Type Three-Phase Asynchronous Motor

In order to accurately determine the fault process of double Y type asymmetric three phase asynchronous motor, based on the theory of motor asymmetry, with the help of ANSYS finite element analysis software, the simulation model of double Y type three phase asynchronous motor is built, the abnormity of three phase current under stator winding asymmetry is verified, and the effect of resistance asymmetric rate on the working characteristic of the motor is analyzed. Three operating conditions of motor failure are discussed. The results show that the three phase current abnormity caused by the winding asymmetry amplifies cyclically, and the degrees of asymmetry of amplitude and phase angle of three phase current increase with the increase of the fault degree.