Coolant circulation system for the rotor of an electric machine having a superconductive excitation winding
US4035678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1975 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | Aug 26, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Coolant circulation system for the rotor of an electric machine having a superconductive excitation winding and carried by a rotary shaft includes a radially outer cold shield surrounding the superconductive excitation winding, a coolant junction head surrounding the shaft at an end thereof adjacent the excitation winding, the coolant junction head having an inlet communicating with an axial bore formed in the shaft, means for refrigerating a coolant, means for conducting coolant from the refrigerating means through the coolant junction head to the shaft bore, means defining a collection chamber surrounding the shaft and communicating with bore means formed in the shaft for discharging the coolant from the shaft, first cooling channels located in the radially inwardly disposed excitation winding and communicating with the shaft bore, and second cooling channels located in the radially outwardly disposed refrigerating shield, the first and the second cooling channels being serially connected and being successively traversible by the same coolant conducted to the shaft bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.