Variable vacuum capacitor and cooling method
US11621125B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2018 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Feb 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G2005/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable vacuum capacitor is described in which oil inside the main bellows (21) is pumped through the bellows and through the oil circuit (8) of a heat exchanger by a pump (15). Water passes through coolant channels (6) of the heat exchanger, from inlet (7) to outlet (7′). The extendable capacitor drive shaft (14) is hollow and serves as a conduit, conveying the oil to the bottom of the (bellows 21), thereby ensuring a full circulation of the oil right through the bellows and then through the heat exchanger. Pump drive means (9) may be a gerotor hydraulic motor, coupled to a gerotor oil pump (15) via magnetic coupling (22). Pumping heat transfer fluid (oil) through the bellows allows the capacitor to operate at significantly higher currents and/or lower temperatures, and significantly extends the life of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.