A comparative study on the structural characteristics of the novel two-phase 8/6 switched reluctance machine

Abstract

This study presents a novel twophase eight stator poles and six rotor poles (8/6) switched reluctance machine (SRM) that can compensate for the vibration and noise problems of twophase 6/3 SRM and compare the characteristics of two SRMs. In the case of twophase 6/3 SRM, the short flux path and the flux direction inside the stator are not reversed, so they have high efficiency characteristics. However, the use of three rotor poles causes problems of vibration and noise because the radial force applied to the rotor poles is not balance. The proposed twophase 8/6 SRM has advantages of 6/3 SRM such as the fluxreversalfree stator and it can improve vibration and noise by using six rotor poles due to balanced radial force acting on the rotor poles. In order to make a reasonable comparison between two SRMs, the electromagnetic field structure of 8/6 SRM is designed to have equivalent torque characteristic to 6/3 SRM and then the copper loss and core loss are compared and analyzed. Finally, we compare the effieicney of two SRMs using finite element analysis and compare the distribution of radial force acting on the rotor poles based on Maxwell's stress method. ? The Korean Institute of Electrical Engineers.