Helical motor oil circulation system
US11095191B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2019 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Mar 8, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/19
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor includes a stator, a rotor shaft assembly carried within and supported to rotate by the stator and a closed-loop cooling system. The rotor shaft assembly includes a rotor separated from the stator by a radial gap. The rotor shaft assembly includes an elongate, hollow shaft about which the rotor is configured to rotate. The shaft includes an opening to flow fluid through a hollow portion of the shaft. The closed-loop cooling system includes multiple helical members positioned within the stator. The multiple helical members are configured to flow cooling liquid in a closed flow pathway defined by the radial gap, the opening and the hollow portion of the shaft during rotor rotation within the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.