Three-phase asynchronous motors are one of the commonly used motors in industrial production, but various faults may occur during use. This article will introduce several typical fault analysis

and maintenance methods of three-phase asynchronous motors.

1. Difficulty in starting the motor

The difficulty in starting the motor may be caused by unstable power supply voltage, incorrect motor winding wiring, poor contact between the motor rotor and the stator. The solution is to check whether the power supply voltage is stable, check whether the motor winding wiring is correct, and check whether the contact between the motor rotor and the stator is good.

2. High noise when the motor is running

The high noise when the motor is running may be caused by motor bearing wear, motor rotor imbalance, motor stator winding failure, etc. The solution is to replace the motor bearing, balance the motor rotor, and repair the motor stator winding failure.

3. The temperature is too high when the motor is running

The temperature is too high when the motor is running may be caused by excessive motor load, poor motor ventilation, aging of motor winding insulation, etc. The solution is to reduce the motor load, improve the motor ventilation conditions, and replace the motor winding insulation.

4. Excessive current when the motor is running

Excessive current when the motor is running may be caused by excessive motor load, aging of motor winding insulation, too small gap between motor rotor and stator, etc. The solution is to reduce the motor load, replace the motor winding insulation, and adjust the gap between the motor rotor and stator.