新型外转子磁齿轮复合电机的设计与研究

提出一种新型外转子磁齿轮复合电机，该电机将磁齿轮和无刷直流电机进行整合，电机的外转子和磁齿轮的内转子共同构成复合电机的内转子，实现了低速大转矩的直接驱动方式，同时充分利用了磁齿轮的内部空间，从而提高了整个传动系统的效率。采用时步有限元法对复合电机的磁场进行分析，充分考虑了谐波磁场的相互耦合问题，并得出复合电机的相关动态特性。这些特性揭示了复合电机非常适合与低速大转矩的直接驱动场合，但是不适合于对舒适度和位置精度要求较高的场合。制造了一台1 200 W原型机，并对原型机进行试验，验证了电磁理论分析结果的正确性。

Design and Research of a Novel Magnetic-geared Outer-rotor Compact Machine

A novel magnetic-geared outer-rotor compact machine is proposed, which integrates a magnetic gear into a brushless DC motor (BLDCM), so that they can share a common cup rotor, then the inner space of the magnetic gear is utilized adequately, thus the low-speed and high-torque is achieved in direct driving, and the high efficiency of the whole system is gained simultaneously. The time-stepping FEM is employed in the analysis of the compact machine for the first time. The coupling of the harmonic magnetic field in the machine is taken into account, thus the dynamic performances of the compact machine are obtained, then discover that the compact machine driving system is suitable for low speed high torque direct driving system with unsuitability of the comfort and precise applications. A prototype machine is tested. The experimental result confirmed the analysis results.