US 12,273,008 B2
Cooling a high-power electric machine
Cristian E. Anghel, Tucson, AZ (US); Toren S Davis, Peoria, AZ (US); and Balwinder Singh Birdi, Tucson, AZ (US)
Assigned to Honeywell International Inc., Charlotte, NC (US)
Filed by Honeywell International Inc., Charlotte, NC (US)
Filed on Jul. 8, 2022, as Appl. No. 17/860,675.
Prior Publication US 2024/0014704 A1, Jan. 11, 2024
Int. Cl. H02K 5/20 (2006.01); H02K 5/18 (2006.01); H02K 9/19 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 5/18 (2013.01); H02K 9/19 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cooling sleeve for an electric machine, the cooling sleeve comprising:
a cylindrical body having an exterior surface;
a first channel formed in the cylindrical body and having a first inlet at a beginning of the first channel, the first inlet for receiving a cooling fluid, the first channel forming a first spiral helix in a first zone of the cylindrical body;
a second channel formed in the cylindrical body and having a second inlet at a beginning of the second channel, the second inlet for receiving the cooling fluid, the second channel forming a second spiral helix in a second zone of the cylindrical body;
wherein the first inlet and the second inlet are formed on the exterior surface at a center along a length of the cylindrical body;
wherein the cooling sleeve includes a first outlet and a second, separate outlet formed on the exterior surface at opposite ends along the length of the cylindrical body and in fluid contact with, and disposed at a terminus of, the first channel and the second channel respectively;
a plurality of turbulators formed in the first channel and the second channel; and
a cylindrical cover, configured to be disposed over the cylindrical body.