Halbach磁齿轮复合电机的分析与研究

Analysis and Research of Halbach Magnetic-geared Permanent-magnet Motor

将磁齿轮与传统永磁电机相结合,构成磁齿轮复合电机,可减小摩擦损耗、提高传动效率。研究复合电机的传动机理,分析比较径向充磁与Halbach充磁复合电机的磁场分布规律,建立电机的时步有限元分析模型,综合考虑谐波磁场和斜槽的影响,对两种电机的气隙磁密及损耗分布进行对比分析,分析不同转速下两种电机的涡流损耗及铁耗分布规律。结果表明,较传统的径向式结构,Halbach磁齿轮传动复合电机具有谐波含量小、铁耗小、效率高等优点,内转子电机的槽口宽度对永磁体涡流损耗产生较大的影响,选择合理的槽口宽度可减小损耗,进一步提高电机的效率。

The magnetic gear is combined with the traditional permanent magnet motor to form the magnetic gear com- pound motor, which can improve the efficiency of the transmission system very effectively. A Halbach magnetic gear drive motor is presented and the transmission mechanism is analyzed. The finite element analysis model of the composite motor is established and compared with the traditional radial magnetizing compound motor. The harmonic analysis of the air gap mag- netic flux is carried out. Considering the influence of the harmonic magnetic field and the chute, the eddy current loss and hysteresis loss of the composite motor are analyzed and optimized. The results show that the Halbach magnetic gear compound motor has the advantages of low harmonic content, small iron consumption and high efficiency; the width of the slot of the inner rotor motor has a great influence on the eddy current loss of the permanent magnet. Choosing a reasonable notch width can reduce the loss and further improve the efficiency of the motor.