US 12,388,311 B2
Stator winding with multiple shifts in phase belt
Kirk Neet, Noblesville, IN (US)
Assigned to BorgWarner Inc., Auburn Hills, MI (US)
Filed by BorgWarner Inc., Auburn Hills, MI (US)
Filed on Dec. 15, 2021, as Appl. No. 17/551,556.
Claims priority of provisional application 63/125,919, filed on Dec. 15, 2020.
Prior Publication US 2022/0190666 A1, Jun. 16, 2022
Int. Cl. H02K 3/28 (2006.01)
CPC H02K 3/28 (2013.01) 25 Claims
OG exemplary drawing
 
1. A stator for an electric machine, the stator comprising:
a stator core with slots formed in the stator core; and
a multi-phase winding arrangement positioned on the stator core, each phase of the winding arrangement including a plurality of conductors defining in-slot portions and end-turns connecting the in-slot portions, the in-slot portions arranged in layers in each of the slots, the plurality of conductors further defining a plurality of paths winding through the layers of the slots, each path of the plurality of paths making at least four wraps around the stator core and comprising:
a first phase shift end turn connecting in-slot portions located in a first pair of layers;
a second phase shift end turn connecting in-slot portions located in a second pair of layers different from the first pair of layers; and
at least one pair of nested end turns provided along said path in association with another of the plurality of paths, wherein the pair of nested end turns comprise an over end turn extending over an under end turn, wherein a pitch of the over end turn is two more than a pitch of the under end turn; and
wherein the end-turns for said path include mostly standard end turns and at least two non-standard end turns, wherein the standard end turns are defined by a standard pitch and the non-standard end turns are defined by non-standard pitches different than the standard pitch.