Development of High Efficiency and High-Speed Motor with High Power Density

This paper describes the development of the high speed motor of 50 [W] at 25 [g] as a space probe rover motor. Furthermore, this motor was required to have high power density. Ultra-thin electrical steel sheet with the thickness of 80μ was used for the iron core of this motor. The iron core shape was designed by vector magnetic characteristic analysis, introducing vector magnetic characteristics representing the magnetic characteristics in arbitrary direction of this electrical steel sheet.