Eddy Current Loss Control in High Speed PM Starter-Generator

This paper highlights the advancement in high speed generation applications along with describing the state of the art in the machine design technologies enabling such an application uptake. Via the investigating on a 250kW high speed PM starter-generator by using the 3-D FEA, the eddy current loss in rotor restrain sleeve, stator end-caps, as well as those in magnets are studied in the view of material and geometry dimensions. Some design arts or dimensions refers to minimize machine eddy current losses going to the minimum are proposed, which are verified by experiments. Both the obtained results and proposed conclusions are have of important significant for high speed machine design or optimization.