US 11,876,405 B2
Electric motor with cooling channels
Kimberly Rae Saviers, Glastonbury, CT (US); Ram Ranjan, West Hartford, CT (US); and Jagadeesh Kumar Tangudu, South Windsor, CT (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed on Jan. 14, 2020, as Appl. No. 16/742,688.
Prior Publication US 2021/0218297 A1, Jul. 15, 2021
Int. Cl. H02K 1/20 (2006.01); H02K 1/14 (2006.01); H02K 15/02 (2006.01); H02K 9/19 (2006.01); H02K 9/197 (2006.01); H02K 3/24 (2006.01)
CPC H02K 1/20 (2013.01) [H02K 1/146 (2013.01); H02K 3/24 (2013.01); H02K 9/19 (2013.01); H02K 9/197 (2013.01); H02K 15/022 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A stator of an electric motor comprising:
a stator core including:
a rim; and
a plurality of stator teeth extending from the rim, the plurality of stator teeth defining a plurality of tooth gaps between circumferentially adjacent stator teeth;
a plurality of stator windings wrapped along the plurality of stator teeth, the plurality of stator windings including:
a plurality of core segments extending along the plurality of tooth gaps; and
a plurality of end turn segments connecting adjacent core segments; and
a plurality of non-electrically conductive cooling channels disposed in the stator core, the plurality of cooling channels configured to direct a cooling fluid flow therethrough to cool the plurality of stator windings;
wherein the plurality of cooling channels extend through the plurality of stator teeth;
an inlet header disposed at a first axial end of the stator including a fluid inlet, the inlet header fluidly connected to the plurality of cooling channels to direct the cooling fluid flow from the fluid inlet to the plurality of cooling channels; and
an outlet header disposed at a second axial end of the stator opposite the first axial end including a fluid outlet, the outlet header fluidly connected to the plurality of cooling channels to direct the cooling fluid flow from the plurality of cooling channels to the fluid outlet;
wherein one or more of the inlet header or the outlet header are formed from a polymeric material;
wherein the plurality of end turn segments are curvilinear; and
wherein one or more of the inlet header or the outlet header is conformally shaped to the curvilinear end turn segments to cool the plurality of end turn segments;
wherein the plurality of cooling channels and one or more of the inlet header or the outlet header are formed together as a single unitary component;
wherein the inlet header includes:
a first header arm extending circumferentially in a first direction from the fluid inlet and terminating at a first arm end; and
a second header arm extending circumferentially in a second direction opposite the first direction from the fluid inlet and terminating at a second arm end.