Flux regulation ability of a hybrid excitation doubly salient machine

In this study, hybrid excitation doubly salient machines (HEDSMs) with parallel excitation structures are introduced. The three types of main poles in the HEDSMs are described and researched, respectively. A 30/20-pole HEDSM is analysed by the magnetic circuit means. Regulation performance of the air-gap fluxes of different main poles is presented. The expression of the total air-gap flux shows the ideal linear relationship between the total air-gap flux and the field excitation ampere-turns. The finite element analysis also verifies the perfect effect of the field control. And the flux line plots and no-load electromagnetic force (EMF) waveforms are presented. The experimental EMF waveforms and no-load characteristic curve are coincident with the simulation results.