A stator has a field winding, the winding comprising a plurality of axial conductors connected at their ends to form at least one circuit with a number of turns. Each axial conductor is disposed within a tubular axial insulation member, the tubular axial insulation members being disposed within a stack of laminations. The axial conductors and the tubular insulation members are radially distributed at equal angles. The position of the axial conductors and the tubular insulation members is predetermined.