US 12,237,720 B2
Electric machine thermal management
Dengfu Zhang, Northville, MI (US); Brian Christian Orr, Macomb, MI (US); Alfredo R. Munoz, Ann Arbor, MI (US); Franco Leonardi, Dearborn Heights, MI (US); and Joel Hetrick, Ann Arbor, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on May 5, 2022, as Appl. No. 17/737,497.
Prior Publication US 2023/0361633 A1, Nov. 9, 2023
Int. Cl. H02K 1/18 (2006.01); H02K 5/20 (2006.01); H02K 9/193 (2006.01); B60K 6/26 (2007.10)
CPC H02K 1/185 (2013.01) [H02K 5/203 (2021.01); H02K 9/193 (2013.01); B60K 6/26 (2013.01); B60Y 2200/91 (2013.01); B60Y 2200/92 (2013.01); B60Y 2306/05 (2013.01); B60Y 2400/60 (2013.01); H02K 2205/09 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electric machine comprising:
a stator core including an outer circumferential surface and an axial row of raised projections that extend radially outboard from the outer surface, wherein the raised projections are axially spaced from each other to define circumferential channels therebetween; and
a housing defining a cavity that receives the stator core, the housing having an inner circumferential surface in contact with the raised projections and radially spaced from the outer surface of the core to define a void space in fluid communication with the channels, wherein the void space and the channels cooperate to form a fluid circuit that overlays the outer circumferential surface such that the fluid is in direct contact with the stator core, wherein the housing defines a redistribution groove recessed into the inner circumferential surface and extending in an axial direction of the stator core, the redistribution groove being in fluid communication with the void space and the channels to form a portion of the fluid circuit.