A novel hybrid excitation bi-tooth flux-switching machine

Bi-tooth flux-switching permanent magnet (FSPM) machine is an interesting brushless machine having magnets and excitation windings in the stator, which exhibits larger back EMF and requires only half the number and volume of PMs compared to conventional FSPM machine. However, air gap magnetic field is difficult to be regulated due to PM excitation alone. In this paper, by introducing an additional field winding and a bypass iron bridge, a novel hybrid excitation flux-switching machine is proposed, which can easily control the air-gap field. The regulation principle, operational feature and electromagnetism performance such as flux-linkage, back-EMF waveforms, and flux regulation capability with different excitations are evaluated by 2D finite element analysis. © 2016, UK Simulation Society. All rights reserved.