Axial-Flux Machine Using Ferrite PM and Round Wire Competitive to Radial-Flux Machine Using Nd-Fe-B PM for HEV Traction

This paper proposes a novel axial-flux permanent magnet machine (AFPM) employing ferrite permanent magnet (PM) and round copper wire. The proposed AFPM has following two features; firstly, a novel rotor structure is adopted. Secondly, suitable shape of tooth-tips is realized. Compared with a radial-flux permanent magnet machine (RFPM) using Nd-sintered PM and the rectangular copper wire, the proposed AFPM achieves same output power and higher efficiency although ferrite PM and the round copper wire are used.