Analysis and treatment of common electrical faults in motors
Analysis and treatment of common electrical faults in electric motors
1. When the motor is turned on, the motor does not turn but there is a humming sound. Possible causes: 1 due to the power-on problem, causing single-phase operation; 2 the motor's carrying capacity is overloaded; 3 is dragged by the mechanical stuck; 4 winding The rotor circuit of the motor is open to break; 5 the internal end of the stator is connected incorrectly, or there is a disconnection or short circuit. Treatment method: In the first case, check the power cord, mainly check the wiring and fuse of the motor, and whether there is line damage. In the second case, the motor is unloaded and then started at no load or half load. The third case is estimated to be due to being Drag the fault of the instrument, unload the driven instrument, and find the fault from the driven device; in the fourth case, check the joint condition of each contactor of the brush, slip ring and starting resistor; the fifth case needs to re-determine the three-phase End and end, and check the three-phase winding for broken and shorted.
