Causes of Overheating in Electric Winches

For overheating issues in electric winches, it is important to assess the condition based on the location of the heat source and apply targeted solutions.

1. Brake Coil Heating

Heat generated by the brake holding coil without excessive temperature rise is considered normal, as the coil frequently engages and disengages during operation. However, if the temperature becomes excessively high, it may be caused by an overly tight or loose brake, leading to excessive current (commonly referred to as “overcurrent”). In such cases, the equipment should be stopped for inspection, and the brake clearance should be properly adjusted.

2. Motor Overheating

Overheating of the motor is primarily caused by overload (approximately 70%). About 20% of cases result from voltage or current imbalance, including phase loss. The remaining 10% may be due to incorrect motor winding connections, such as reversed stator winding terminals, or motor faults including inter-turn or inter-layer short circuits, winding grounding, blocked air ducts, or poor ventilation.

3. Gear Reducer and Transmission Components

Excessive temperature at the gearbox vent or overheating at rotating parts may occur due to severe wear of the connecting pin between the rotating shaft and the motor.

4. High Ambient Temperature

Excessively high ambient temperature can cause the entire winch to overheat. The normal operating environment is typically between -10°C and +40°C. When this range is exceeded, overheating is likely to occur.