US 12,266,996 B2
Liquid cooled motors using hydraulic expansion tubes with corrugated contact
Ghanshyam Shrestha, Raleigh, NC (US); Wei Xing, Raleigh, NC (US); Graham Medlin, Raleigh, NC (US); and Rajib Mikail, Raleigh, NC (US)
Assigned to ABB SCHWEIZ AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Dec. 22, 2021, as Appl. No. 17/559,894.
Prior Publication US 2023/0208255 A1, Jun. 29, 2023
Int. Cl. H02K 9/197 (2006.01); H02K 1/20 (2006.01); H02K 9/19 (2006.01)
CPC H02K 9/197 (2013.01) [H02K 1/20 (2013.01); H02K 9/19 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A stator, comprising:
a lamination stack,
wherein the lamination stack includes a plurality of laminations stacked upon each other,
wherein each lamination of the plurality of laminations comprises:
a first lamination hole with a first cross-sectional geometry, and
a second lamination hole with a second cross-sectional geometry,
wherein the first cross-sectional geometry differs from the second cross-sectional geometry,
wherein a corrugated channel of the lamination stack has varying internal diameter, the corrugated channel formed by the first lamination hole of a first lamination being axially aligned over the second lamination hole of a second lamination forming the corrugated channel,
wherein fluid flows through the corrugated channel, and
wherein the lamination stack is adjacent to a stator end plate,
wherein the stator end plate comprises a corrugated channel that is directly connected to the corrugated channel of the lamination stack.