Phase winding for a rotating electrical machine stator and stator equipped with same

A stator of a rotary electric machine, in particular an alternator or alternator-starter for a motor vehicle, comprising:

• an annular cylindrical body comprising axial slots which open axially into the front and rear axial end walls of the body and which are open radially into the inner cylindrical wall of the body;
• at least one phase winding which comprises corrugated turns of wire which comprise a series of axial strands which are received in a series of associated slots and connecting strands which connect the successive axial strands by protruding alternately with respect to the rear axial end wall and with respect to the front axial end wall;
• and
• at least one phase winding comprises a first outer half-phase forming a first outer layer of turns which is received in the bottom of the slot, and a second inner half-phase forming a second inner layer of turns which are radially superposed, the connecting strands of the first outer half-phase forming outer coil ends and the connecting strands of the second inner half-phase forming inner coil ends, the inner and outer coil ends protruding axially with respect to the front and rear axial end walls of the body;
• wherein for each phase winding, the length of wire of each turn of the inner half-phase is greater than the length of wire of each turn of the outer half-phase, such that the protruding axial height of the inner coil ends is greater than the protruding axial height of the outer coil ends.