How to protect a running permanent magnet motor

We have learned about the protection work of many permanent magnet motors before. We know that the protection work of this motor includes: short-circuit protection, under-voltage protection, loss-of-voltage protection, field weakening protection, overload protection, etc. In addition to protection work, we also need regular maintenance to extend its service life.

As for the application of permanent magnet motors, I believe many people already know about it. Moreover, no matter what kind of equipment it is, we are required to use it correctly and protect it regularly. For the running permanent magnet motor, we also need to take special protective measures. Let’s introduce in detail how to protect the running permanent magnet motor!

1. When the permanent magnet motor is running, we should check the temperature, oscillation, sound and commutation of each part, and pay attention to whether there is overheating, discoloration and the smell of burnt insulation.

2. Use a listening rod to check the sound of each component, and determine whether there are any other conflicting sounds between the rotor and stator in addition to electromagnetic sound and ventilation sound. In addition, check the bearing bushes or bearings for any abnormal noise.

3. Check the connection points and insulators of the main circuit of the permanent magnet motor. Pay attention to whether there is any discoloration due to overheating, and whether there is any abnormal smell such as burnt insulation.

4. In order to prevent the motor from being overloaded, we must pay attention to the current and voltage values ​​of the motor for a long time. For DC systems with insulation inspection equipment, the insulation status to ground should be checked regularly.

5. For the closed cooling system, attention should be paid to the phenomenon of water receding and wind stagnation. The cooler of the permanent magnet motor should also be checked for leaks and crusts, and the wind network should be compensated for obstructions.

6. Check the oxide film on the outer surface of the commutator to see if its color is normal. Check whether there are sparks between the brushes and the commutator, whether there is accumulation of carbon powder and grease on the surface of the commutator, whether there is dust accumulation on the brush holder and brush holder, etc.

The above content is the protection measures for the permanent magnet motor in operation. It can be seen from it that if we use it correctly and perform regular maintenance of the equipment, the working efficiency of the equipment will be improved and its lifespan will be extended. corresponding improvement.