Topologies of flux-switching machines for in-wheel traction

Flux-switching machines (FSMs) are a strong candidate for in-wheel traction of electric vehicles. However, the winding topology of this type of machines still needs to be investigated. This paper proposes a general method for calculating the winding factor of flux switching machines (FSMs) using the numbers of phases, stator slots and rotor teeth. With this method, winding factors of FSMs with different number combinations of phases, phase slots, and rotor teeth are obtained and compared as an indication of their efficiencies. Based on the obtained winding factors, flux-switching machines with full-pitch distributed windings are proposed and analyzed.