Quantitative comparison of partitioned-stator machines for hybrid electric vehicles

Abstract

In this paper, three partitioned-stator (PS) machines, namely the PS flux-switching DC-field (PS-FSDC) machine, the PS-FS hybrid-excitation (PS-FSHE) machine, and the flux adjuster FS permanent-magnet (FA-FSPM) machine are proposed. With different flux-regulating mechanisms, all three proposed machines can offer satisfactory flux-weakening capabilities for wide-speed range operations. Unlike the traditional PS machine that installs the armature windings and the excitation sources in the outer-stator and inner-stator, respectively; the proposed machines purposely swap the installation arrangements. Upon the proposed structure, the FA-FSPM machine can fully utilize the stator core for PM material accommodations. As a result, excellent power and torque densities can be achieved. To verify the proposed concepts, these three PS machines are quantitatively compared based on the hybrid electric vehicle (HEV) specifications.