由于环境恶劣及电流过载，造成了电机内部起火烧损了定子线圈和转子过热变形及轴承损坏等情况造成电机无法使用。

The firing inside the motor that caused by bad environment and current overload made the stator coils overburned, overheated rotor deformed and bearing damaged, which led to the motor out of service.

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损坏情况大体分为两种：一种是定子屏蔽套良好，而定子绕组发生对地、相间击穿，线圈匝间短路，过载而造成绕组烧毁。

Damage be divided into two: one is a good set of stator shielding, and the occurrence of stator windings, the breakdown phase, the coil turn-to-turn short circuit, overload caused by burnt windings.

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