How to deal with the degaussing of permanent magnet frequency conversion air compressor! —Shared by Sollant

The biggest problem of permanent magnet variable frequency air compressor is degaussing. High temperature, severe vibration, driver reasons, etc.

may cause degaussing. To avoid demagnetization of permanent magnet variable frequency air compressor, how to solve the problem of demagnetization of permanent magnet variable frequency air compressor? The solution to demagnetization of permanent magnet frequency conversion air compressor.

Methods as below:

The correct selection of the power of the permanent magnet variable frequency air compressor, degaussing is related to the power selection of the permanent magnet variable frequency air compressor. Correct selection of the power of the permanent magnet variable frequency air compressor can or delay the degaussing phenomenon. The main reason for the degaussing of the permanent magnet variable frequency air compressor is that the temperature is too high, and overload is the main reason for the high temperature.

Therefore, when selecting the power of the permanent magnet variable frequency air compressor, it is necessary to leave a margin. According to the actual situation of the load, it is generally more appropriate to be around 20%. Properly increase the thickness of the permanent magnet. From the perspective of the design and manufacture of the permanent magnet synchronous permanent magnet frequency conversion air compressor, the relationship between the armature reaction, the battery transition and the demagnetization of the permanent magnet should be considered.

Under the combined action of the magnetic flux generated by the torque winding current and the magnetic flux generated by the radial force winding, the permanent magnets on the rotor surface are likely to cause demagnetization. When the air gap of the motor remains unchanged, the method to ensure that the permanent magnet does not demagnetize is to increase the thickness of the permanent magnet appropriately.

There is a ventilation slot circuit inside the rotor to reduce the temperature rise of the rotor. An important factor affecting the reliability of the permanent magnet variable frequency air compressor is the demagnetization of the permanent magnet. If the temperature of the rotor rises too high, the permanent magnet will lose its magnetism irreversibly.

In structural design, the internal ventilation circuit of the rotor can be used to directly cool the magnetic steel. Not only reduces the temperature of the magnetic steel, but also improves the efficiency. Avoid heavy-load starting and frequent starting.

During the starting process of the asynchronous motor, since the starting torque is oscillating, in the valley section of the starting torque, the stator magnetic field acts as a demagnetization effect on the rotor magnetic poles. Therefore, try to avoid overloading and frequent starting of the synchronous motor of the asynchronous magnetic variable frequency air compressor.

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