2015 年 23 巻 1 号 p. 23-28
We propose a novel magnetic gear with a high torque density and a huge gear ratio despite the small number of magnet poles. This magnetic gear combines a magnetic flux harmonics gear with a magnetic paradox planetary gear by replacing all planetary gears with steel pole pieces. Its structure and operating principle are described, and the effectiveness of the proposed gear is verified by 3-D finite element analysis.