HTS inductor electric machine with combined excitation

Abstract

A completely electric aircraft [1]-[3], as well as electric sea [4]–[5] and land transport, requires compact brushless turbogenerators and motors [6] with high specific power which can be obtained only through increasing the induction in the air gap and the stator linear load. The most promising method to do so is to use HTS field coils and HTS armature windings [7]-[12]. Synchronous generators with HTS field coils require a rotating cryostat and sliding current leads. The traditional inductor motor does not possess rotating HTS field coils and rotating cryostat, however, due to the lack of alternation of the inductor poles, the induced EMF has a very low value. This paper describes the general design of an inductor motor with HTS coils in the stator, which provides the increased specific output power. The paper also presents the results of FEM simulation of magnetic field distributions.