A comparative study of switched reluctance motors with a single‐phase and a novel Synchronous double‐phase excitation mode

Abstract

To obtain a short flux path and improve the torque performance, a double-phase excitation (DE) was generally used for switched reluctance motor (SRM). But the torque ripple of the SRM working under DE with traditional winding distribution increases because of the inconsistent electromagnetic field. To deal with this problem, an 8/6 SRM working under DE with novel winding distribution (DESRM) is proposed here. In order to comprehensively analyse the electromagnetic performance of DESRM, it is compared with a traditional single-excitation SRM and double-excitation SRM with traditional winding, in terms of air flux density, radial and tangential force components, inductance, torque, and losses. The theoretical and finite element analysis results reveal the cause of differences on torque and vibration of the motor as well as the mechanism of generating different motor performance. In addition, the analysis shows that the proposed DESRM generates a higher torque with a reduced torque ripple. Finally, a pair of prototypes with different winding configurations is designed and used to verify the theoretical analysis.