Six-phase double-stator inner-rotor axial flux PM machines with novel detached winding

This paper proposes a novel detached winding for 6-phase double-stator inner-rotor axial flux PM machines. The connection of detached 6-phase winding is firstly given, followed by a comprehensive comparison with the conventional 6-phase winding in aspect of the winding factor, EMF and inductance, et al. Comparison of performance including rotor eddy current loss, torque ripple and rotor unbalanced axial force under fault tolerance operation is also mentioned in this paper.