US 12,149,129 B2
Embedded liquid cooled rotor cooling
Debabrata Pal, Hoffman Estates, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on May 27, 2021, as Appl. No. 17/331,774.
Application 17/331,774 is a continuation of application No. 16/151,517, filed on Oct. 4, 2018, granted, now 11,159,069.
Prior Publication US 2021/0288535 A1, Sep. 16, 2021
Int. Cl. H02K 1/32 (2006.01); H02K 3/24 (2006.01); H02K 9/00 (2006.01); H02K 9/197 (2006.01)
CPC H02K 1/32 (2013.01) [H02K 3/24 (2013.01); H02K 9/00 (2013.01); H02K 9/197 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotor for an electrical machine, comprising:
a core including a plurality of rotor poles circumferentially spaced apart from one another about a hub and configured to rotate about a central axis of the core;
an outer shaft extending axially within the hub, configured for common rotation with the hub, and defining a first inner passage therein;
an inner shaft extending axially within the outer shaft, configured for common rotation with the outer shaft, and defining a second inner passage therein;
a winding wound about the rotor poles, wherein the winding passes longitudinally through a respective winding gap between each circumferentially adjacent pair of rotor poles; and
a cooling tube extending through at least one of the respective winding gaps, the cooling tube having an inlet end connected for fluid communication with the second inner passage and an outlet end connected for fluid communication with the first inner passage.