1. The first type of magnetization belongs to open circuit magnetization. Due to the absence of an external magnetic field circuit during magnetization and the absence of a closed circuit, the magnetization of the magnetic tile is not easy to saturate, which has an impact on the magnetic flux density of the tile. Generally, it is lower than closed circuit magnetization;

2. The second type of magnetization is the most commonly used, which belongs to closed circuit magnetization. The magnetic flux density after magnetization is also the highest, and the waveform of the air gap magnetic density can be adjusted by the shape of the magnetization head to meet the requirements of different motor performance. However, during motor assembly, special tools need to be used for assembly, otherwise the rotor may be damaged or the magnetic tile may be broken due to magnetic attraction;

3. The third magnetization method also belongs to closed circuit magnetization (because the rotor lamination is a good magnetic material), and the magnetic flux density of the magnetized magnetic tile is generally between the first and second types. Note: When using the entire machine for magnetization, it is best to keep the carbon brush and rotor winding in an open circuit state, otherwise there may be sparks on the contact surface between the carbon brush and the commutator.