On Winding Manufacturing Technologies for Coreless Axial-Flux Permanent-Magnet Machines

This paper presents a comparison of Litz-wire-based and PCB-based stators for coreless axial-flux permanent-magnet (C-AFPM) machines. Manufacturing challenges for both winding technologies are analyzed in depth. Attention is paid to machine capabilities and small-scale series production viability. This paper examines stator designs using concentrated trapezoidal non-overlapped coils. Comparative 3D FEA and experimental tests on two machine prototypes.