Patent ID: 7034428
Filing Date: 2006-04-25
Classification: H02K

Abstract:
1. An electric machine comprising: a stator having a substantially cylindrical interior, said stator comprising a plurality of stator slots; a first plurality of hairpin conductors positioned in said stator slots in a short pitch arrangement to form a first winding set, said first plurality of hairpin conductors each including an end turn and two legs of unequal length, said legs of unequal length of each of said first plurality of hairpin conductors bent outward to generally follow the circumference of said stator, wherein the longer of said legs of unequal length of each of said first plurality of hairpin conductors is bent in a first circumferential direction and the shorter of said legs of unequal length of each of said first plurality of hairpin conductors is bent in a second circumferential direction; a second plurality of hairpin conductors positioned in said stator slots in a short pitch arrangement to form a second winding set, said second winding set being substantially concentric with said first winding set, said second plurality of hairpin conductors each including an end turn and two legs of unequal length, said legs of unequal length of each of said second plurality of hairpin conductors bent outward to generally follow the circumference of said stator, wherein the shorter of said legs of unequal length of each of said first plurality of hairpin conductors is bent in said first circumferential direction and the longer of said legs of unequal length of each of said second plurality of hairpin conductors is bent in said second circumferential direction; and at least one electrical connection between said first winding set and said second winding set, said at least one electrical connection made by joining at least one leg of said first plurality of hairpin conductors to at least one adjacent leg of said second plurality of hairpin conductors.