Hybrid current limiter having superconductor windings
AssigneeGEC Alsthom SA
InventorsVan Doan Pham, Jean-Pierre Dupraz, Michel Collet, Yves Brunet, Pascal Tixador
Life of this patent
Estimating the term…
Abstract
A hybrid current limiter comprising a first winding of non-superconducting conductive material having a large number of turns and electrically connected in series with a superconductoring coil of low self-inductance and placed in a cryostat, and a second winding of non-superconducting conductive material having a small number of turns, said second winding being closely coupled with said first winding in such a manner as to obtain low overall inductance, the second winding being connected in parallel with the series circuit constituted by the first winding and the superconducting coil.
Claims10
A hybrid current limiter comprising:
- a cryostat, a superconducting coil of low self-inductance placed in said cryostat, a first winding of non-superconducting conductive material positioned external of said cryostat and having a large number of turns, said first winding being connected in series with said superconducting coil, a second winding of non-superconducting conductive material positioned external of said cryostat and having a small number of turns, said second winding being closely coupled with said first winding to obtain lower overall inductance, and said second winding being connected in parallel with a series circuit constituted by said first winding and said superconducting coil, whereby the coupling coefficient of the magnetic circuit is quickly changed, greatly reducing the voltage across the terminals of the superconducting winding with a corresponding reduction in heat energy dissipated by the superconducting portion.
Dependencies are inferred from the claim text.