Design and Analysis of a High-Speed PMSG with Litz Wire Winding Technology

In this paper, a 70kW/40krpm high speed permanent magnet synchronous generator (PMSG) was designed and performance analysed in a detailed manner. The machine design features a Halbach rotor with the oil-cooled Litz wire stator winding technology to maximize the power density and efficiency. A unified high speed machine design methodology was developed which covers the electro-magnetic, mechanical, thermal and rotor-dynamics aspects and applicable to both e-aviation and ultra-high speed EV sectors. In the end, a comprehensive performance analysis of the high speed machine such as the loss & efficiency and etc. was carried out to show that the design would be able to achieve an industry-leading power density of 4.6kW/kg.