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High-temperature superconductive current-sharing cable and current sharing realizing method

A high-temperature superconducting and cable technology, applied in the usage of superconducting elements, superconducting magnets/coils, superconducting devices, etc., can solve the problems of many factors affecting contact resistance, no current in the strip, and excessive current.

Active Publication Date: 2018-07-24
BEIJING EASTFORCE SUPERCONDUCTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But no matter what kind of cable is facing a key technical problem is the problem of current sharing. Although the cable is connected in parallel with multiple strips, the current is not evenly distributed on each strip, resulting in excessive current in some strips of the cable. Some strips have no current and do not play the shunting function that the cable should have
This uneven current phenomenon is especially serious in superconducting cables
This is because under the condition of multiple superconducting wires connected in parallel, the superconductor has no resistance. According to the Ohm's law model, the current on each wire depends on the size of the contact resistance at the end of each strip, and there are many factors affecting the contact resistance. In the process It is difficult to accurately control the contact resistance, resulting in uneven shunting

Method used

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  • High-temperature superconductive current-sharing cable and current sharing realizing method
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  • High-temperature superconductive current-sharing cable and current sharing realizing method

Examples

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Effect test

Embodiment 1

[0024] Such as figure 1 The schematic diagram of the structure of the superconducting cable is shown, in which the innermost layer uses bundled multi-core copper wires 1 to form a cluster skeleton 2. 15mm, a thin copper strip 3 is spirally wound around the skeleton as a transition layer to smooth local unevenness; the first layer of superconducting strip 4 is wound outside the transition layer of the thin copper strip, and the superconducting strip 4 is YBCO with a thickness of 0.15mm and a width of 4mm Strip;

[0025] Such as figure 2 As shown, the first layer of superconducting tape 4 is wound clockwise according to the right-hand rule, the pitch 5 of the first layer of superconducting tape is 14mm, and whether the initial layer is clockwise or counterclockwise is not strictly regulated; The first layer of superconducting tape 6 is wound counterclockwise, the pitch 7 of the second layer is 12mm; the third layer of superconducting tape 8 is wound clockwise, and the pitch 9...

Embodiment 2

[0028] In embodiment 1, using strips of the same width to balance the inductance between different layers by changing the pitch to achieve current sharing; in embodiment 2, using strips of different widths to achieve inductance balance, such as Figure 4 As shown, the first layer of superconducting tape 4 is wound clockwise by YBCO tape with a thickness of 0.15 mm and a width of 12 mm. The superconducting tape 6 is wound in a counterclockwise manner by YBCO tape with a thickness of 0.15 mm and a width of 10 mm, and the winding pitch is arranged in a close manner; the third layer of superconducting tape 8 is wound in a clockwise manner with a YBCO tape with a thickness of 0.15 mm and a width of 8 mm. The winding pitches are closely arranged; the fourth layer of superconducting tape 8 is wound counterclockwise by 0.15mm and 6mm wide YBCO strips, and the winding pitches are arranged in a close manner, and the pitch is 0 when closely arranged.

[0029] In actual use, the pitch of ...

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Abstract

The invention discloses a high-temperature superconductive current-sharing cable and a current sharing realizing method, and belongs to the technical field of superconducting magnets. According to thecable, high-temperature superconductive belts are wound on a cylindrical metal skeleton, and the cylindrical metal skeleton is of a flexible metal tubular structure of integrated molding, or a multi-core metal wire is bundled and twisted to form a cylindrical skeleton, a thin copper belt is wound around the cylindrical skeleton densely in a spiral manner and serves as a transition layer so as tosmoothen local unevenness; the superconductive belts are wound on the metal skeleton in the spiral manner, and initial points of the superconductive belts are welded to one initial copper electrode; termination points of the superconductive belts are welded to one terminal copper electrode to form a multi-layer superconductive current layer; the metal skeleton plays an internal support role, and can be used for shunting when the superconductive layer has a fault; and a balance inductance design is used in the superconductive current layer, so that current are shared averagely among the different superconductive belts, and the current transmission capability of each superconductive belt is utilized fully.

Description

technical field [0001] The invention belongs to the technical field of superconducting magnets, and in particular relates to a high-temperature superconducting current sharing cable and a method for realizing current sharing. Background technique [0002] HTS magnet cables are the basic unit for winding large magnets. There are many problems in using a single superconducting wire to wind a magnet. The most important problem is that the number of turns is large, the inductance is large, and the safety is low. Therefore, multiple wires are combined to form a cable, and the high-temperature superconducting magnet is wound with the cable. , the number of turns of the magnet will be greatly reduced, and the inductance will be greatly reduced accordingly. This cable structure has been widely used in the field of large low-temperature superconducting magnets. [0003] With the rapid development of high-temperature superconducting materials, various forms of high-temperature super...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/06H01B13/00H01F6/06
CPCH01B12/06H01B13/00H01F6/06Y02E40/60
Inventor 高琦岳宇宾
Owner BEIJING EASTFORCE SUPERCONDUCTING TECH
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