Improved Two Phases Stator Wound-Field Flux-Switching Machines with Overlapping Windings

Low efficiency and power density caused by the excitation loss is a bottleneck problem limiting the development of the stator wound-field flux-switching (SWFFS) machines. Hence, under the same volume size, the power density and efficiency improvement for SWFFS machines should be given priority. In this paper, the improved 16/10-pole and 16/11-pole SWFFS machine with overlapping windings are proposed to improve the power density. Compared with conventional 16/10-pole and 16/11-pole two phases SWFFS machine with no-overlapping windings, the proposed improved SWFFS machine topologies have higher pitch factor by adopting the overlapping armature windings. Consequently, higher back electromotive force (EMF) and higher power density can be produced. The simulation results prove the reliability and effectiveness of proposed SWFFS machine topologies.