Investigation on different pole configurations of an outer rotor integrated magnetic gear

In contrast to conventional permanent magnet machines, integrated magnetic gears exhibit different pole pairs in the stator and the rotor. Consequently, a flux modulation of the air gap magnetic field is necessary for torque transmission, wherefore additional flux modulation poles (FMPs) are used. As the number of FMPs adopts to the pole configuration of the stator and the rotor, arbitrary combinations of both are possible. This results in new degrees of freedom in the machine design process, wherefore this paper studies the advantages and disadvantages of a wide range of different stator and rotor pole configurations.