Design Study on High Power Density Quasi-Coreless PMSM for Vehicle Traction Drive Rotating at 50,000r/min as the Maximum Speed

This paper presents a design study on high-power density quasi-coreless permanent magnet synchronous motor for vehicle traction drives rotating at 50,000r/min as the maximum speed. Stator body is composed of carbon fiber reinforced plastic, a small amount of soft magnetic composite core and aluminum windings. Rotor body consists of carbon fiber reinforced plastic frame and polar anisotropic magnet. FEA-base feasibility study on the quasi-coreless motor with high power density and reduced losses are investigated, targeting the maximum speed of 50,000 r/min, the maximum power of 150 kW and the power density more than 10 kW/kg.