Design and analysis of magnetic-geared permanent magnet synchronous motor for driving electric vehicles

In order to increase the output power density and maintainability of the conventional driving system in electric vehicle, the research on magnetic gears is being carried out variously all over the world. In this paper, the design technique of the magnetic-geared permanent magnet synchronous motor(MG-PMSM) is first studied for the application of the MG-PMSM structurally integrated with magnetic gear and PMSM to the electric vehicle driving system. In addition, a small-scale MG-PMSM model is designed and analyzed using an electromagnetic FEM tool.