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Revealing the ten major reasons for motor burnout

Date:2024-07-05   Author:XINDA MOTOR
There are two most common reasons for motor burnout, with phase loss and bearing damage being the most common. The following are the top ten common reasons for motor burnout:

1. Phase loss and burning: mainly caused by power supply defects, contactors, fuses, wiring terminals, power cords and other problems. The faults often occur due to line oxidation, poor contact and phase loss, and also due to carbonization and sparking of individual contacts of the contactor.
2. Overload/overcurrent burnout: The reasons for the burnout of all three-phase windings include overload, overvoltage, and undervoltage. The motor may also burn out if the load on the motor is too large and exceeds the rated power of the motor.
3. Moisture and dust: If the motor is in a humid environment for a long time or a large amount of dust accumulates inside, its insulation performance may be reduced, which may lead to burning.
4. Short circuit burning: The motor is short-circuited between turns, between phases, or to the ground due to collision or manufacturing defects.
5. Bearing damage: Bearing quality problems, such as material, internal defects, dry friction, moisture and water ingress, dust ingress, and incorrect refueling may all lead to bearing damage, thus causing the motor to burn out.

Bearing damage causes excessive clearance and burns the stator core of the sweep motor

6. Heat dissipation problem: Poor heat dissipation of the motor causes the motor temperature to be too high and the internal insulation resistance to decrease, thus causing the motor to burn out.

7. Environmental issues: The ambient temperature is too high or too low, and the humidity is too high or too low, which will have an adverse effect on the motor and cause the motor to burn out.

8. Wiring problem: If the motor is wired incorrectly, such as connecting star to triangle or triangle to star, long-term operation may cause the motor to burn out.

9. Voltage problem: Voltage that is too high, too low or overvoltage may cause the motor to burn out. When there is a power outage or power supply, voltage fluctuations may directly damage the motor.

10. Improper maintenance: Failure to perform necessary maintenance and care for a long time, such as cleaning internal dust, replacing worn parts, etc., may also cause the motor to burn out.