Development of reliable gearless motors for electric vehicles

Electric vehicles (EVs) are the cleanest and greenest road transportation for smart cities [1].The purpose of this paper is to design and analyze a new class of reliable gearless motors for EVs based on the MagD concept. Namely, the magnetic steering (MS) winding is incorporated into the single-stator double-rotor stator-field motor to realize the MagD for EVs. While the stator-field motor has different topologies and the generalization includes both radial-field (RF) and axial-field (AF) morphologies, the flux-switching DC (FSDC) topology has the merits of high robustness, low material cost and flexible field control [5] and the AF morphology has the advantages of high torque density and high power density.