The failure of aluminum motor can be divided into two kinds: electrical failure and mechanical failure. Electrical failures include failures of switches, fuses, buttons, stator windings and starting equipment; Mechanical failures include failures of bearings, housings, shafts, fan blades and end caps. Electrical and electronics engineers are burdened. They need to be familiar with various motor failures. Once a Marine motor fails, electrical and electronics engineers on board must accurately find out the cause and part of the fault in a short period of time, and use motor theory to compare and analyze different faults, eliminate unrelated factors, and find the cause and part of the fault. The following are the tools to judge the steps of the faulty body: 1. Master the operating state, structure, specifications and working mechanism of the aluminum motor. During the normal operation of the aluminum motor, please always pay attention to its operating status. if