US 12,476,521 B2
Ceramic sleeve for a stator housing of an electrical machine
David James Tate, Hemel Hempstead (GB)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on May 16, 2023, as Appl. No. 18/198,129.
Prior Publication US 2023/0378850 A1, Nov. 23, 2023
Int. Cl. H02K 9/197 (2006.01); H02K 5/10 (2006.01)
CPC H02K 9/197 (2013.01) [H02K 5/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrical machine comprising:
a rotor rotatable about a rotor axis;
a stator surrounding at least a portion of the rotor;
a stator housing defining a compartment containing the stator and a cooling fluid, wherein the cooling fluid is configured to surround and cool the stator during operation; and
a ceramic sleeve extending between the stator and the rotor and sealing the stator housing to contain the cooling fluid in the compartment, wherein the ceramic sleeve is seated in grooves formed into each of first and second end walls and adjacent to gaps between radially inner edges of the first and second end walls and a radially outer surface of the rotor.