US 12,278,550 B2
Stator assembly of an electric motor with retrofitted heat pipes
Alireza Fatemi, Canton, MI (US); Chih-Hung Yen, Bloomfield Hills, MI (US); Farzad Samie, Franklin, MI (US); SeungHwan Keum, Northville, MI (US); Thomas W. Nehl, Shelby Township, MI (US); and Xiaofeng Yang, Troy, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Mar. 9, 2022, as Appl. No. 17/690,071.
Prior Publication US 2023/0291281 A1, Sep. 14, 2023
Int. Cl. H02K 9/22 (2006.01); H02K 1/20 (2006.01); H02K 9/20 (2006.01)
CPC H02K 9/20 (2013.01) [H02K 1/20 (2013.01); H02K 9/225 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A motor stator, comprising:
a stator core having a plurality of stator teeth on an inner diameter thereof and defining a respective plurality of slots between the plurality of stator teeth;
a plurality of windings disposed in the slots; and
a heat pipe network including;
a plurality of evaporator portions including a hollow structure disposed in at least a portion of the plurality of slots and including an interior having a wick extending along the interior of the hollow structure; and
a condenser portion having an interior portion in communication with the plurality of evaporator portions and at an end of the stator core, the wick of each of the plurality of evaporator portions extending into the condenser portion, wherein the stator core includes a coolant passage therein that is connected to a pump;
wherein the condenser portion includes a first condenser portion at one end of the stator core and a second condenser portion at a second end of the stator core and wherein the plurality of evaporator portions include a first plurality of evaporator portions extending from the first condenser portion to a longitudinal mid-region of the stator and a second plurality of evaporator portions extending from the second condenser portion to a longitudinal mid-region of the stator and separate from the first plurality of evaporator portions, wherein the plurality of windings include overhanging portions extending beyond opposite ends of the stator core and the first condenser portion and the second condenser portion are disposed radially within an overhanging portion of the plurality of windings.