Research on the magnetization of a tangentially magnetized brushless DC motor

For the permanent magnets used in a tangentially magnetized brushless DC motor, normally they can be magnetized by three ways: component magnetization, sub-assembly magnetization and post-assembly magnetization. In this paper the post-assembly magnetization is investigated and compared with the component magnetization. After two times of post-assembly magnetization, the permanent magnets in the tangentially magnetized brushless DC motor can be fully magnetized. The rotor surface flux densities and motor performance curves of component magnetization and post-assembly magnetization are consistent.