Superconducting devices, such as slip-rings and homopolar motors/generators
US10965077B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2019 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Sep 5, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K55/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device {i.e., a slip-ring or a homopolar motor/generator) (40, 50, 80) is adapted to provide electrical contact between a stator and a rotor (41, 83), and includes: a current-carrying brush-spring (31, 84) mounted on the stator, and having two opposite surfaces; a fibrous brush assembly (35, 69) mounted on the conductor, the brush assembly having a bundle of fibers (36, 71) arranged such that the tips of the fibers will engage the rotor for transferring electrical current between the stator and rotor; a ribbon (33, 85) of superconducting material mounted on each opposite surface of the current-carrying brush-spring and communicating with the stator and the brush assembly; and another ribbon (29, 86) of superconducting material mounted on the rotor. The device is submerged in a cryogenic fluid at a temperature below the transition temperatures of the superconducting materials such that the electrical resistivity of the device will be reduced and the current-transfer capability of the device will be increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.