Concentrated winding layout for a stator of an electrical ac machine

A method of manufacturing an electrical AC machine comprising:

• providing a stator having a plurality teeth alternating with a plurality of slots in a circumferential direction,
• arranging a concentrated winding layout comprising a plurality of coils wound on the plurality teeth and belonging to at least six phases, each slot of the plurality of slots housing at least two coils of the plurality of coils, each phase of the at least six phases comprising a first coil and a second coil, the second coil of one phase being wound in opposite direction with respect to the respective first coil of the same phase,
• arranging a plurality of interconnections for connecting the first and second coil of each phase, the interconnections being parallel to each other.