How to maintain electric vehicle motors

After purchasing an electric vehicle motor, how should we maintain it to extend its lifespan? Next, let's learn about the maintenance of electric vehicle motors.

1. The usage environment should be kept dry regularly, the surface of the motor should be kept clean, and the air inlet should not be obstructed by dust, fibers, etc.

2. When the thermal protection of the motor continues to operate, it should be determined whether the fault comes from the motor, overload, or the setting value of the protection device is too low. After eliminating the fault, it can be put into operation.

3. Good lubrication of the motor should be ensured during operation. A typical electric motor should be lubricated or replaced after running for about 5000 hours. If the bearing overheats or the lubrication deteriorates during operation, the hydraulic system should promptly replace the lubricating grease. When replacing the lubricating grease, the old lubricating oil should be removed, and the oil grooves of the bearing and bearing cover should be cleaned with gasoline. Then, ZL-3 lithium grease should be filled into 1/2 (for 2 poles) and 2/3 (for 4, 6, and 8 poles) of the cavity between the inner and outer rings of the bearing.

4. When the service life of the bearing is over, the vibration and noise of the motor operation will significantly increase. When the radial clearance of the bearing reaches the following value, the bearing should be replaced.

5. When disassembling the motor, the rotor can be removed from either the extended or non extended end of the shaft. If it is not necessary to remove the fan, it is more convenient to remove the rotor from the non shaft extension end. When removing the rotor from the stator, care should be taken to prevent damage to the stator winding or insulation.

6. When replacing the winding, it is necessary to record the form, size, number of turns, wire gauge, etc. of the original winding. When these data are lost, they should be requested from the manufacturer. Changing the original design winding arbitrarily often deteriorates one or several performance aspects of the motor, and even renders it unusable.