Alternative stator for new brushless dual-rotor flux-switching permanent magnet motor for extended range electric vehicles

This paper proposes a new integrated electromechanical set for extended range electric vehicles (EREVs), which is termed as brushless dual-rotor flux-switching permanent magnet (BLDR-FSPM) motor. The proposed motor incorporates the merits of stator-permanent-magnet motors and dual-rotor PM motors, offering high torque density, compact structure. Moreover, the proposed motor possesses the feature of functioning as a traction motor and generator simultaneously, which makes it possible to realize electric energy conversion under extended mileage condition. In this paper, four feasible topologies of the composite stator are described, which are named C-core, E-core, CB-core, and EB-core. Their basic electromagnetic performances are compared by 2-D finite element (FE) method, and the prediction results of the proposed motor confirms that the CB-core stator provides a more sinusoidal back EMF waveform and smaller cogging torque.