Additional Losses in the Winding Under Higher Frequency Current

This paper explores the additional losses in electrical machine windings, focusing on high-frequency operations. These losses arise from the skin effect, proximity effect, and circulating currents within the winding conductors. The selected loss-suppressing methods are demonstrated using a stator stack for a small permanent magnet synchronous motor with a fractional-slot concentrated winding. Selected winding configurations are manually wound and the measurements are compared with the finite element method. Core losses are measured independently.