US 12,316,205 B2
Rotor overhang design for direct oil cooling of electric machines
Sachin Ganakota, Auburn Hills, MI (US); Shreyas Kapatral, Oakland Township, MI (US); Steven L Hayslett, Troy, MI (US); Brandon R Given, Oakland, MI (US); and Dhafar Al-Ani, Troy, MI (US)
Assigned to FCA US LLC, Auburn Hills, MI (US)
Filed by FCA US LLC, Auburn Hills, MI (US)
Filed on Mar. 20, 2023, as Appl. No. 18/186,475.
Prior Publication US 2024/0322649 A1, Sep. 26, 2024
Int. Cl. H02K 9/193 (2006.01); H02K 5/15 (2006.01); H02K 5/20 (2006.01); H02K 7/116 (2006.01)
CPC H02K 9/193 (2013.01) [H02K 5/15 (2013.01); H02K 5/203 (2021.01); H02K 7/116 (2013.01)] 19 Claims
OG exemplary drawing
 
12. An electric motor comprising:
a stator having end windings;
a rotor that rotates with a rotor shaft; and
a first end plate disposed at an axial end of the rotor, the first end plate having a central hub and an overhang, the overhang including an outwardly extending radial rim and a lip, the radial rim including an outer surface, an inner surface, and at least two passages defined therethrough;
wherein the first end plate facilitates cooling of the electric motor by directing fluid (i) off of the outer surface of the radial rim and onto an inner diameter of the end windings; (ii) around the inner surface of the radial rim whereby the fluid builds pressure due to centrifugal force created from rotation of the rotor; and (iii) through the at least two passages and onto the inner diameter of the end windings.