Cogging Torque Analysis of Magnetic Gear

This paper describes the harmonic spectra of the cogging torque of a magnetic gear. The operating principle of this gear is described, and the transmission torque under operation in accordance with the gear ratio is mathematically formulated. In particular, the harmonic order of the cogging torque is described in detail. Moreover, the orders of the cogging torque of both rotors are verified by employing 3-D finite element method. The computed results are also then further verified by carrying out measurements on a prototype. Other harmonic components are observed in the computed and measured results, but it is discussed why they are contained in the cogging torque.