Abstract: Taking 150 W motor as an example, the magnetization principle, magnetization direction, magnetization energy parameter selection, magnetization compensation and magnetization positioning deviation angle are analyzed respectively. Combined with Ansoft simulation, the effects of different magnetization methods, temperature relationship between magnetic steel and rotor outer surface and magnetization positioning deviation angle on air gap flux density and air gap flux are studied. Research shows that improper magnetization direction or insufficient magnetization energy will lead to poor magnetization quality, which will affect the air gap flux, flux density, harmonic content and demagnetization current of the motor, resulting in the motor can not meet the design requirements. Therefore, for different motors, we should choose a reasonable way of magnetization, and improve the quality of magnetization process, in order to make the magnetic steel play the best performance.

Key words: Permanent magnet motor, Electromagnetic performance, Magnetization process