Abstract
This paper describes the transmission torque characteristics in a surface permanent magnet-type (SPM-type) magnetic gear. The operating principle of this gear and its transmission torque under the synchronous operation in accordance with the gear ratio are formulated. And the highorder components contained in the cogging torque are verified by employing the 3-D finite element method (FEM) and carrying out measurements on a prototype. Furthermore, a method for reducing the cogging torque is discussed.
