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Superconducting current limiting device with magnetic field assisted quenching

A superconducting current limiting and superconducting technology, applied in circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, superconducting devices, etc. , hot spot heating and other problems, to achieve the effect of reducing the critical current density

Inactive Publication Date: 2005-06-22
NEXANS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If any fault occurs in the trigger element, uniform quenching of the current limiting element connected to this trigger element cannot be ensured, which can lead to localized heating or burning due to hot spots

Method used

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  • Superconducting current limiting device with magnetic field assisted quenching
  • Superconducting current limiting device with magnetic field assisted quenching
  • Superconducting current limiting device with magnetic field assisted quenching

Examples

Experimental program
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Embodiment Construction

[0076] figure 1 A preferred embodiment of the superconductor element 1 used in the invention is shown, which is in the shape of a tube or a rod. A coil 3 is wound on the superconductor body 2 , and the coil 3 is fixed on electrical contacts 4 , 5 at two opposite ends of the superconductor body 2 . The electrical contacts 4, 5 are provided with means 7, such as threads, to allow fastening on the wires for power supply and on the connections of additional elements.

[0077] In this embodiment a hole 6 is provided in each electrical contact 4 , 5 to allow a cooling medium such as liquid nitrogen to flow also in the inner region of the superconductor body 2 . As a result, the recooling process can be accelerated.

[0078] The length of the superconductor body having the shape of a tube or a rod may be between 15 millimeters and about 500 millimeters. In practical applications, the length is selected according to the requirements of a specific superconducting current limiting de...

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Abstract

The present invention relates to a superconducting current limiting device comprising a superconductor component (1) wherein each superconductor component (1) comprises a superconductor body (2) on which a coil (3) is wound the coil being electrically connected to the superconductor body (2) wherein in the superconducting current limiting device a magnetic field is generated on transition of the superconductor from the superconducting state to the normal conducting state. <IMAGE>

Description

technical field [0001] The invention relates to a superconducting current limiting device. The invention particularly relates to an induction superconducting current limiting device that generates a magnetic field when the superconductor changes from a superconducting state to a normal conducting state. Background technique [0002] In order to avoid the excessive current impact caused by faults such as short circuit, so as to protect the power system from damage, current limiters are used in new power systems, especially high-power systems. [0003] Superconductors have great potential as fault current limiters, which enable fast effective current limiting, automatic recovery, negligible impedance during normal operation, and high-voltage applications. [0004] All superconducting materials can lose their superconducting properties due to: [0005] a) exceeding the critical temperature (Tc), [0006] b) exceeding the critical magnetic field (Hc), or [0007] c) exceedin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H10N60/85H01F6/06H02H7/00H02H9/02H10N60/00H10N60/30H10N60/355
CPCH01F2006/001H10N60/355H10N60/00
Inventor 乔基姆·博克斯蒂芬·埃尔施纳弗兰克·布鲁尔
Owner NEXANS
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