Rotor overhang design for direct oil cooling of electric machines
US12316205B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2023 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Dec 25, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/19
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric machine configured to generate and transfer drive torque to a driveline for propulsion of an electric vehicle includes a gearbox assembly, an electric motor having a rotor and a stator having end windings, and a thermal management system. The thermal management system includes a first end plate disposed at an axial end of the rotor. The first end plate has a central hub and an overhang. The overhang includes an outwardly extending radial rim and a lip. The radial rim includes an outer surface, an inner surface, and at least two passages defined therethrough. 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, and (ii) through the at least two passages and onto the inner diameter of the end windings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.