Design of All-Superconducting Electrical Motor for Full Electric Aircraft

Abstract

An analysis of domestic and foreign developments in the field of full electric aircraft showed that a reduction in full takeoff weight, operating costs, maintenance time and the increase of fuel efficiency is possible with the growth of electrification. Nowadays such aircraft are created only for a small number of passengers and the power of their electric motors is negligible. However, all the concepts of large full electric aircraft imply the use of high temperature superconductor technologies. The most promising concept for high temperature superconducting electric machines with high specific parameters technically feasible in the near future is a fully superconducting synchronous electric machine with a nonmagnetic core. At the output power of more than 1 MW, the specific power is anticipated to exceed 10 kW/kg at 77 K. The fundamentals of theory and the analytical technique for calculating the basic parameters of a fully high temperature superconducting electric machine with an outer ferromagnetic screen have been developed. To refine the developed analytical method, the 1,5 kW prototype of the all-superconducting electric motor for hybrid distributed propulsion system was developed. It was shown that the analytical calculation provides sufficient accuracy in determining specific power and other basic parameters of fully superconducting electrical machine.