Design Aspects Of Bearingless Slice Motors

The complexity of a bearingless motor offers a multi-tude of freedom in constructive design because differ-ent motor setups may even have nearly the same dy-namic behavior and may differ only slightly in someoperation characteristic. However, the mechanicalsetup often has a very strong impact on the powerinverter topology and the volt-ampere requirementsand, thus, affects the system costs significantly.This paper focuses on design aspects of bear-ingless slice motors with permanent magnet excita-tion and presents a methodical evaluation approachbased on performance indexes.