Failure analysis of bars breaking of squirrel-cage rotor of traction motor

ZHAO Dongchao; XIE Guisheng

doi:10.7512/j.issn.1001-2303.2020.01.21

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Failure analysis of bars breaking of squirrel-cage rotor of traction motor
Vol. 50, Issue 1, Pages: 109-113(2020)
Published：2020
DOI： 10.7512/j.issn.1001-2303.2020.01.21
稿件说明：

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DOI：

ZHAO Dongchao, XIE Guisheng. Failure analysis of bars breaking of squirrel-cage rotor of traction motor[J]. Eletric Welding Machine2020, 50(1): 109-113. DOI： 10.7512/j.issn.1001-2303.2020.01.21.

摘要

为了分析某型机车牵引电机中频感应钎焊鼠笼式转子断条的原因

使用电镜扫描和宏观金相分析断口组织

运用ANSYS有限元软件分析了转子铁心冲片与导条在不同接触模式下断口部位的应力分布及固有频率对转子断条的影响

提出了检修电机断条预防措施和新造电机改进方案

解决了该型电机转子断条故障

保证了机车的运行安全。

Abstract

In order to analyze the cause of bars breaking of squirrel-rotor by intermediate frequency induction brazing of traction motor of a certain locomotive

fracture microstructure has been analyzed by electron microscopy scanning macro metallography. The fracture site stress distribution under different contact modes between rotor core punch and bars

and the influence of natural frequency on bars of the rotor has been analyzed by finite element software. The bars breaking preventive measures of the repaired motor and the improvement scheme of the new motor has been put forward to solve the questions

which has solved the breaking of rotor

and ensured the safety of the locomotive operation.