US 12,244,177 B2
Axial flux electric machine including cooling fins projecting from casing to spaces between windings on stator cores
SeungHwan Keum, Northville, MI (US); Jian Yao, Shanghai (CN); and Yusheng Zou, Northville, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on May 16, 2022, as Appl. No. 17/744,865.
Prior Publication US 2023/0318369 A1, Oct. 5, 2023
Int. Cl. H02K 1/20 (2006.01); H02K 1/2798 (2022.01); H02K 5/20 (2006.01); H02K 16/02 (2006.01); H02K 21/24 (2006.01)
CPC H02K 1/20 (2013.01) [H02K 1/2798 (2022.01); H02K 5/20 (2013.01); H02K 16/02 (2013.01); H02K 21/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An axial flux electric machine comprising:
a casing having a hollow cylindrical shape with an inner radial surface and an outer radial surface;
stator cores spaced circumferentially along the inner radial surface of the casing;
windings wrapped around the stator cores; and
fins projecting from the inner radial surface of the casing to spaces between the windings,
wherein each fin includes two concave side surfaces that meet to form a point that is disposed in a space between adjacent windings, and
wherein each fin includes a coolant channel formed within that fin.