关键词: 外转子永磁电机, 连续不等齿结构, 齿磁密, 转矩提高

Abstract: To improve the torque performance of the external rotor permanent magnet motor,a continuous unequal tooth structure is proposed. Compared with the traditional equal tooth structure permanent magnet motor, this structure significantly improves the motor torque. The finite element method was used to establish the simulation model of a 36 -slot 32-pole external rotor permanent magnet motor model with equal tooth width,and its performance was analyzed to verify the rationality of the designed motor;Referring to the traditional unequal tooth structure of spacer teeth,a continuous unequal tooth structure is designed,and the auxiliary teeth adopt a dovetail groove structure;four different methods are designed for the continuous unequal tooth structure,and the effectiveness of the structure to improve the motor torque is verified by finite element method. By comparing the magnetic densities of the stator teeth in the equal tooth and unequal tooth structures,it is proved that the adoption of the continuous unequal tooth structure can enhance the motor torque.