Wound rotor synchronous electric machine
US11075561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2017 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Feb 12, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/193
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wound rotor (1) has a structure defining a circumferential alternation of teeth and grooves. The teeth respectively receives longitudinal windings. The rotor (1) has longitudinal ends (17, 17′) and the windings defining, at the longitudinal ends of the rotor (1), protruding coil heads (40). A collar (10, 10′) for mechanically holding the windings is installed at one of the longitudinal ends (17, 17′) of the rotor (1) so as to define a central opening (101, 101′). A nozzle (21, 21′) projects a liquid coolant through the central opening (101, 101′) onto the coil head (40). The collar (10, 10′) has an escape duct (11, 11′) allowing escape of the liquid coolant projected onto the coil heads (40) to an outside of the collar (10, 10′). A longitudinal end of the collar (10, 10′) has a constant reduction in an outer diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.