The electric locomotive often breaks down in the process of use, which affects the normal operation of motor vehicle. The article summarizes and analyses the common converter faults and causes, and proposes some improved methods of converter, which achieve the normal operation of motor vehicle and the normal production of open-pit mine.%抚顺东露天矿电机车在使用过程中经常发生故障，影响机车的正常运行。对转换器常见故障及原因进行了总结分析，并提出了有针对性的转换器改进措施，实现了电机车的正常运行和露天矿的正常生产。
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