Torque Characteristic Analysis of an Axial-gap-type Magnetic Gear developed as a Speed-up-gear

摘要

This paper presents cogging torque reduction methods for an axial-gap magnetic gear utilizing combination of the number of poles with the stationary pole pieces and modifying the pole piece shape. The present study is aimed to develop a magnetic gear, which has a large transmission torque over 360Nm by using the three-dimensional finite element method. The maximum transmission torque of 300Nm was achieved in the prototype gear at 4.4rpm of the low-speed rotor (the gear ratio, Gr = - 13.61).