Study of a High-Speed Motorization With Improved Performances Dedicated for an Electric Vehicle

This paper presents the study of an entirely electromagnetic traction system to be used for electric vehicle (EV) application. To have a reduced mass and compact system, the electric motor will work at 40500 r/min. Usually, the high-speed electrical machines are rather used for ventilation or compressor systems, with low dynamics. The high variation of the load torque in EV application demands the best possible mechanical/energetic performances. The traction system proposed here is composed by a high-speed permanent magnet motor linked to a magnetic gear. This paper will present the technology of the entirely electromagnetic traction chain and its energetic and mechanical performances. The results are validated numerically through finite-element analysis.