Permanent magnet motor is often demagnetized burnt?

Permanent magnet motor is often demagnetized burnt? The manufacturers of permanent magnet synchronous motor should think about the following ways:

Permanent magnet motor uses permanent magnet to generate motor magnetic field, without excitation coil excitation current, high efficiency simple structure. It is a good energy-saving motor. With the advent of high-performance permanent magnet materials rapid development of control technology, the application of permanent magnet motor will become more more extensive. But people who often use it will find that the permanent magnet motor is often demagnetized burned, causing great losses. Today, the permanent magnet synchronous motor manufacturers come to think of solutions.

1. Keep clean

During the operation of permanent magnet motor, dust, water stain other sundries are allowed within 3M around the air inlet to prevent the motor being inhaled, forming short-circuit medium, damaging the insulation of conductor, causing short circuit burning the motor. Therefore, it is necessary to ensure that the permanent magnet motor has sufficient insulation resistance good ventilation cooling environment, so as to keep the permanent magnet motor safe during long-term operation Stable working condition.

2. Observe whether the permanent magnet motor has large vibration noise

If the permanent magnet motor vibrates, it will cause different centrality of the load part connected with it, which will increase the load of the permanent magnet motor cause overload operation, which will burn the motor. Therefore, in the operation of the permanent magnet motor, especially the high-power permanent magnet motor, it is necessary to check whether the anchor bolt, end cover, bearing gland, etc. are loose, whether the grounding device is reliable, if any problem is found, solve it in time.

There is also a point that the manufacturers of permanent magnet synchronous motor should say that if the motor overload time is too long, the permanent magnet motor will absorb a lot of active power the grid, the current will increase, the temperature will rise, the insulation of the permanent magnet motor will age under high temperature, the magnetic steel will lose field. Therefore, it is necessary to check the motor in time to prevent overload operation.