Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1998-11-18
2000-01-18
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
335297, 335299, 336DIG1, 361 19, 361141, 323355, H01F 100
Patent
active
060160942
ABSTRACT:
In a superconducting short circuit current limiter for an AC power supply net including an iron core, a primary coil and a secondary short-circuited superconductive coil, both being magnetically coupled with the iron core but being arranged at a distance from each other, the iron core has gaps at opposite sides of the secondary coil for thermically uncoupling the secondary coil from the rest of the magnetic core and a tertiary coil is arranged closely adjacent the primary coil in a magnetically strongly coupled relationship therewith, and has a heat capacity sufficient to accommodate the joulean heat generated when a fault or short circuit occurs in the power supply net, and the iron core has an area of reduced cross-section which is so selected that it becomes magnetic flux saturated when the current in the primary coil exceeds a predetermined reaction current level.
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Tixador et al., "Hybrid AC Superconducting Current Limiter: Small Scale Experimental Model", IEE Proceedings: Generation, Transmission and Distribution, vol. 141, Nr. 2, Part C, Mar. 01, 1994, pp. 117-124.
Tixador et al., "Hybrid AC Superconducting Current Limiter Extrapolation 63 KV-1 250 A", Journal de Physique III, vol. 4, Nr. 4, Apr. 04, 1994, pp. 604-608.
Bach Klaus T.
Donovan Lincoln
Forschungszentrum Karlsruhe GmbH
Nguyen Tuyen T.
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