Device for inductive current limiting of an alternating current employing the superconductivity of a ceramic high-temperature superconductor
US5140290A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Nov 14, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/87
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for inductive current limiting of an alternating current consisting of an induction coil (2), which includes at least one winding and through which current flows, a body (3) made of a ceramic high-temperature superconductor arranged concentrically to the latter and having a centrosymmetrical form which is hollow in the interior, and having located in the interior of said body (3) a concentrically arranged core (4) made of a soft magnetic material of high permeability. In normal operation (rated current), the superconductivity of the body (3) is effective and impedance of the induction coil (2) is very low. With overcurrent (mains short-circuit) the superconductivity disappears and the impedance of the induction coil (2) reaches its maximum, current-limiting value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.