磁齿轮复合永磁电机拓扑及应用综述

Magnetic geared machine (MGM) is a novel flux-modulated permanent magnet machine with multiple airgaps and gear effect. Because of its high torque density and power factor, it has gained extensive attention on its broad application prospects in EV/HEV, low-speed-high-torque direct-drive, and aerospace industry. Given the feature of contactless transmission, MGM also has drawn close attentions from pharmaceutical and food industry, renewable energy and petrochemical industry. This paper firstly introduces the operation principle and topologies of magnetic geared machines been recently proposed, compares the combination patterns and respective features. Then, topology innovations of MGMs are concluded based on the arrangements, structures of flux modulator, types of motors and magnetic gears, flux directions and operation modes. Recent studies on some key issues in MGMs are introduced towards high gear ratio, high torque density and low cost. At last, the major development directions and applications of MGMs are concluded and predicted in this paper.