what are the brief methods to check the fault of permanent magnet motor?
the four simple methods to check the fault of permanent magnet motor include seeing, listening, smelling and touching. 1、 look: when the permanent magnet motor is running, observe whether there is any abnormality. the main phenomena are as follows: 1. when the stator winding is short-circuited, you can see that the motor emits smoke. 2. if the motor is seriously overloaded or has phase failure, the speed will slow down and a strong "buzz" will be heard. 3. if the motor operates normally but stops suddenly, you will see that the wire is loose, the fuse is blown, or the parts are jammed to produce sparks. 4. if the motor vibrates violently, the transmission device may get stuck, the motor connection is poor, and the foundation screw is loose.