Modeling Approach for Superconducting AC Windings: Case Study on Axial Flux PM Machines

This paper aims to analyze the modeling of superconducting tapes when used for the realization of AC windings in rotating electrical machines. The model is based on literature formulations that describe the non-linear resistivity of superconducting materials, including the effects of external AC magnetic fields. An axial flux permanent magnet machine is considered as case study for applying the provided formulations. The 3D FEM machine model is solved considering both a conventional copper stator winding and superconducting counterpart, with the aim to verify the equivalence of these two winding solutions. Then, a 2D modeling approach of a single-slot is proposed for time-efficient investigations of the superconductor’s behavior in the presence of the slot leakage flux.