This paper demonstrates the development of ultra high speed motors for hydrogen fuel vehicles, suggesting improvements in power density and efficiency.
In order to improve the power density and efficiency of a hydrogen fuel vehicle, it is an effective method to design an ultra‐high‐speed centrifugal air compressor to supercharge the incoming air, which is also a great challenge. In this paper, four types of ultra‐high‐speed permanent magnet motors with integrated rotors are proposed based on permanent magnet materials and structures, and the maximum speed of the motors reaches 100 krpm. The integrated rotor considering interference assembly is designed and analysed by the finite element method. Furthermore, the integrated rotor was analysed in terms of electromagnetism, temperature, stress and dynamics, and the reliability of the rotor with different structures and materials was investigated. Finally, a 25 kW ultra‐high speed permanent magnet motor is manufactured and tested to verify the effectiveness of the design, which provides guidance for the design and manufacture of ultra‐high speed permanent magnet motor.
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Cheng et al. (2025) studied this question.
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