US 12,170,460 B2
Stator with phase shift
Kirk Neet, Noblesville, IN (US); and Cong Ma, Noblesville, IN (US)
Assigned to BorgWarner Inc., Auburn Hills, MI (US)
Filed by BorgWarner Inc., Auburn Hills, MI (US)
Filed on May 20, 2022, as Appl. No. 17/749,380.
Claims priority of provisional application 63/191,200, filed on May 20, 2021.
Prior Publication US 2022/0393521 A1, Dec. 8, 2022
Int. Cl. H02K 1/16 (2006.01); H02K 3/12 (2006.01)
CPC H02K 1/16 (2013.01) [H02K 3/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stator for an electric machine comprising:
a stator core including a plurality of teeth defining a plurality of slots, the stator core having a first axial end and a second axial end opposite the first axial end; and
a winding positioned on the stator core, the winding comprising a plurality of parallel paths per phase for the winding, each parallel path comprising (i) a plurality of first end loops provided on the first axial end of the stator core, (ii) a plurality of conductors extending through the slots, and (iii) a plurality of second end loops provided on the second axial end of the stator core;
wherein the plurality of conductors are arranged in layers in the slots, wherein the layers include a total number of layers (L) including at least two inner layers, two middle layers, and at least two outer layers, wherein L/2 is an odd whole number; and
wherein the winding defines a common pitch (CP), and wherein the first end loops and second end loops associated with the middle layers alternate between having a pitch equal to CP+1 on the first axial end and a pitch equal to CP−1 on the second axial end.