Eddy Currents in the Solid Rotor Yoke of a High-Torque PMSM with Tooth-Coil Winding

The introduced prototype machine is a downsized demonstrator of an outer rotor wind generator combining a tooth-coil winding with a solid rotor yoke. The air gap field space harmonics of the tooth coil winding lead to significant eddy currents in the solid rotor yoke, which are investigated by analytical and numerical models as well as by measurements of the built prototype. While the analytical model is primarily useful to identify the dominating space harmonics, the 2D non-linear FE simulation leads to quantitative results matching the experimental data.