US 11,811,294 B2
Integrated stator cooling jacket system
Michael Duane Bradfield, Anderson, IN (US)
Assigned to BORGWARNER INC., Auburn Hills, MI (US)
Filed by BorgWarner Inc., Auburn Hills, MI (US)
Filed on Jan. 10, 2020, as Appl. No. 16/739,264.
Claims priority of provisional application 62/793,215, filed on Jan. 16, 2019.
Prior Publication US 2020/0227977 A1, Jul. 16, 2020
Int. Cl. H02K 9/00 (2006.01); H02K 5/20 (2006.01); H02K 9/19 (2006.01); H02K 1/20 (2006.01)
CPC H02K 9/00 (2013.01) [H02K 5/203 (2021.01); H02K 1/20 (2013.01); H02K 9/19 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electric machine comprising:
a housing having an outer surface, an inner surface, a coolant inlet, and a coolant outlet; and
a stator mounted in the housing, the stator being formed from a plurality of stator laminations arranged in a first lamination group and a second lamination group that is circumferentially off-set from the first lamination group, the first lamination group and the second lamination group forming a tortuous flow path that extends axially across the stator, each of the plurality of stator laminations of the first lamination group and the second lamination group comprising:
a body having an inner surface section and an outer surface section, the inner surface section including a plurality of stator teeth; and
a plurality of cooling channel defining members integrally formed with and extending radially outwardly from the outer surface section, each of the plurality of cooling channel defining members being spaced from others of the plurality of cooling channel defining members by a corresponding gap, and
wherein each of the plurality of cooling channel defining members includes a first circumferentially extending portion and a second circumferentially extending portion that are spaced from the outer surface section, a first circumferentially extending portion of the first lamination group overlaps a second circumferentially extending portion of the second lamination group to form at least one coolant passage.