Radial ring magnet, the magnetic pole direction is radial from the center to the surrounding. Its magnetic pole position and number of magnetic pole pairs depend on the magnetizing method. There are also many magnetizing methods. According to the magnetizing method, it can be divided into unipolar magnets, multi-stage magnets, direct impulse magnets, and oblique magnets. The number of magnetizing poles and the angle of oblique charging are determined by the final magnetizing fixture.