三相异步电动机突然短路分析
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摘要：异步电机具有结构简单，维护方便等优点，其应用领域非常广泛。运用直接相量法建立了三相异步电动机的数学模型，并利用Ansoft语言建立了仿真模型。以一台三相异步电动机为例，仿真了电机发生突然短路后的电机瞬态过程，并给出了定子电流、转矩的瞬态曲线。通过仿真与理论相结合进行分析，得出在突然短路过程中，电机定子电流和转矩波动趋势。
关键词：三相异步电动机；数学模型；突然短路
中图分类号：TM341 文献标识码：A
文章编号：1005-913X（2015）08-0101-03
Transient Analyse Suddently Short Circuit of Three-phase Induction Motor
Zhang Wei-qiang
（Heilongjiang Polytechnic，Harbin 150036）
Abstract：In this paper the transient process and harm of three-phase induction motor suddently short circuit is analyzed and researched. Mathematical models for simulating suddently short circuit in three-phase induction motor ， using direct phase quantities， are described. Simu-
ulating models are builded by Ansoft software. Using a three-phase induction motor as prototype， Simulations were performed respectively when the motor circuit is shorted at different time. And results about currents， torques are analysed. From the simulate result and theoretical analysis we can see the variationg tendency about curret and torque during shorting.
Key words：three-phase induction motor， mathematical model， Suddently Short Circuit
一、引言
异步电机具有结构简单，维护方便等优点，其应用领域非常广泛。随着异步电机应用范围的不断增多，发生短路故障的机率也相应增加。短路故障是电机最常见最危险的故障之一，其主要包括如下几个方面。
一是大的冲击电流会引起供电母线电压下降，严重影响同一供电母线正常运行的其它电气设备；二是大的冲击电流以及母线电压的下降，可能会危...
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