Reason of ventilation noise
The ventilation noise of the motor is mainly the following three kinds of components
Technical requirements of the outer circle of the core
When the rotor core is pressed into the rotating shaft, the outer circle of the rotor core
Suppression of electromagnetic noise
The electromagnetic noise radiation of the motor depends on the vibration response of the electromagnetic
Cause of winding short circuit
long-term motor over load operation, winding current long-term and excessive, make insulation aging Jiaocui, loss of insulating effect or shaken and crack and fall off.
Possible causes of failure of winding to ground
the winding is affected with damp, the insulation material loses the insulation function
