Design of a bearingless 100 kW electric motor for high-speed applications

In this work a design optimization of the high-speed buried-type interior permanent magnet bearingless motor with significant power for such machines is presented. The geometry, windings arrangement and magnets are adjusted from the non-levitated motor design to avoid the significant magnetic saturation and achieve the performance target without oversizing the machine. The analytical design is optimized in finite element method analysis. The effect of stator skew on machine performance is thoroughly investigated.