Permanent magnet motor is coated with antirust layer, why there will be rust spots?

Permanent magnet motor is a kind of widely used electrical equipment, which has its application in many places such as cars, elevators, etc. today, I will bring you to learn more about permanent magnet motor.

The permanent magnet motor uses the permanent magnet to generate the magnetic field of the motor, without excitation coil excitation current, with high efficiency simple structure. The permanent magnet motor has the advantages of high efficiency, high specific power, high power factor, high reliability easy maintenance. The variable frequency speed control system with vector control can make the permanent magnet motor have a wide range of speed control.

In order to prevent rust, permanent magnet motors generally do antirust treatment. However, permanent magnet motors may cause rust spots due to environmental factors improper human operation after being used for a period of time, which will cause corrosion on the surface of the machine. In this case, timely treatment is needed to prevent corrosion aggravating.

So what causes rust spots in permanent magnet motors?

1. In the manufacturing process of permanent magnet DC motor, if the electroplating time is enough, the coating of motor will appear rust spots, which belongs to the problem of technological process.

2. Before electroplating, if the dirt on the surface of the motor is carefully removed, the coating of the motor will also appear rust spots.

3. Permanent magnet DC motor used in the environment into which the air circulation is good, wet temperature difference changes a lot, will also make the motor coating rust.

4. If the seal of the packaging motor is damaged, it will cause the motor to oxidize, then the coating will rust.

The above is the reason for the rust spot of permanent magnet motor. If there is a corresponding situation in use, we should deal with it in time to prevent other effects on the motor in later use.