Rotor assembly with magnets and cooling channels and cooling channel separation element in the shaft
US11418077B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2019 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Aug 25, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/124
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor assembly for an electric machine includes a rotor core, a plurality of permanent magnets, which are arranged within a magnet pocket each, formed in the rotor core, with a clearance extending in the axial direction, and a shaft connected to the rotor core for conjoint rotation. A cooling channel arrangement is formed within the rotor assembly, and includes a first cooling channel extending within the shaft, a second cooling channel fluidically connected to the first cooling channel and extending in the radial direction along an end face of the rotor core, and a third cooling channel, which, adjoining the second cooling channel, extends in the axial direction through the clearances in the magnet pockets. The arrangement further includes a separation element, which separates an interior of the shaft into a first shaft portion, in which the first cooling channel extends, and into a second shaft portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.