High temperature superconducting current limiter
US5521149A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1995 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | May 26, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/881
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A superconducting current limiter comprising a bar or tube of high temperature superconducting material of the composite type made up of glass and a high temperature superconducting oxide, the volume fraction of the glass lying in the range 10% to 40%, the bar or tube being selected to comply with the following inequalities: EQU .rho.>10.sup.-4 .OMEGA..multidot.m EQU j.sub.c >10.sup.+5 A/m.sup.2 EQU .rho.x.sup.2 <10.sup.11 W/m.sup.3 in which inequalities: PA1 .rho. designates the resistivity of the material in the normal, i.e. the non-superconducting, state; PA1 j.sub.c designates the critical current density; PA1 .rho.x.sup.2 designates the power density dissipated in the bar or tube during the transition stage; PA1 it being specified that the critical current density is defined as the density which produces an electric field of 10.sup.-4 V/m along the tube or bar and that it is accepted that limitation takes place for a current density equal to five times the critical current density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.