What Are The Methods For Magnetizing Motor Magnets?

1. Magnetize the magnets individually before installing them in the housing, and then assemble them. This is open-circuit magnetization. During magnetization, there is no external magnetic material magnetic path, not a closed circuit. Magnetization is less likely to reach saturation, which will affect the magnetic flux density of the magnets themselves.

2. Magnetize the magnets after installing them in the housing (and gluing them together), and then assemble the whole assembly. This is closed-circuit magnetization, resulting in a high magnet density. To meet different motor performance requirements, the shape of the magnetizing head can be adjusted to adjust the air gap flux density waveform. The disadvantage is that assembly is complicated and requires specialized tooling for mirrored assembly.

3. Install the magnets in the housing (and gluing them together), assemble the finished product, and finally magnetize the whole assembly. This is closed-circuit magnetization, and the magnetic flux density after magnetization is somewhere between the two methods mentioned above.

Comparing the three methods of magnetizing motor magnets, the first method is more convenient and has a higher production efficiency, but the surface residual magnetism after magnetization is 10% lower than the second and third methods. The second method is the most reasonable and can be used for external or internal magnetization. It must be glued and dried in advance, which is convenient for production. The third method is suitable for magnetizing small motors.