Development of a Novel Yokeless and Segmented Armature Axial Flux Machine Based on Soft Magnetic Powder Composites

摘要

The magnetic and mechanical properties of soft magnetic powder composites (SMC) have beenrnrecently significantly improved. Within the project “Design and analysis of an electric motor based onrnnew material components (SMC)” Daimler AG, the Institute of Electrical Engineering (ETI) at thernKarlsruhe Institute of Technology (KIT) and PMG Füssen GmbH examined and evaluated the use ofrnsoft magnetic composites in the electrical machine with segmented armature torus structure,rnespecially as a main drive in hybrid electric or pure electric vehicles. Because of the existing threedimensionalrnmagnetic flux in this machine topology, the complex soft magnetic components can onlyrnbe manufactured with SMC rather than with conventional electrical steels. Based on 3D FEMrnelectromagnetic analysis, the mechanical construction and analysis have been carried out and arnprototype has been built at KIT. The measurements of the manufactured prototype on the test benchrnin ETI proved its simplicity, stability and functionality.