Binary current lead structure in conduction cooling mode

A binary current lead, conduction cooling technology, applied in the direction of superconducting magnets/coils, circuits, electrical components, etc., can solve the problems of theoretical and practical access, ignoring coupling correlation, etc.

Inactive Publication Date: 2014-06-04
YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some previous studies mainly focused on one or two aspects, often ignoring the coupling r

Method used

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  • Binary current lead structure in conduction cooling mode
  • Binary current lead structure in conduction cooling mode
  • Binary current lead structure in conduction cooling mode

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Embodiment Construction

[0016] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0017] Such as figure 1 and figure 2 As shown, the binary current lead structure under conduction cooling mode provided in this example includes a first lead segment 1 and a second lead segment 3 .

[0018] The first lead section 1 is made of copper lead from the normal temperature end to the first-stage cold head of the refrigerator; the second lead section 3 is a high-temperature superconducting lead from the first-stage cold head to the second-stage cold head of th...

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Abstract

The invention discloses a sectional binary current lead structure on the basis of conduction cooling. The sectional binary current lead structure is characterized in that a copper lead portion of a current lead is of a sectional variable-cross-section structure, a constant-temperature connecting portion of the copper lead portion is thick, a high-temperature superconductor connecting lead end of the copper lead portion is thin, a connecting portion of the copper lead portion is in conical transition, and a superconductor lead portion of the current lead is of an epoxy resin fixed assembly structure. The sectional binary current lead structure has the advantages that heat leakage of the current lead can be greatly reduced owing to the sectional variable-cross-section structure, and the sectional binary current lead structure is favorable for machining; a joint of a common conductor and a superconductor is optimally designed and is refrigerated by a primary cold head of a refrigerator, aluminum nitride (AlN) is used as an insulating heat-conduction material, the cross section of the aluminum nitride is maximized, only the section side of a part, which is close to the cold head, of a copper lead keeps connected with a superconductor lead, accordingly, contact heat resistance of the joint is low, heat leakage can be reduced, a good cold-conduction effect can be realized, and quench at the joint can be effectively prevented.

Description

technical field [0001] The invention belongs to the current lead technology in superconducting magnets, and in particular relates to a segmented variable cross-section binary current lead structure based on conduction cooling. Background technique [0002] Since room temperature superconducting materials have not yet been discovered, existing superconducting devices need to work in a low temperature environment. Magnets made of low-temperature superconducting materials usually operate below 4.2K, magnets made of high-temperature superconducting materials need to operate at a temperature below 77K of liquid nitrogen, and the power supply for magnet excitation is at room temperature. The conductor connecting the room temperature power supply and the low temperature magnet is called the current lead, which is the transition section from room temperature to low temperature. [0003] For low-temperature systems, the more heat is introduced from the outside, the greater the loss ...

Claims

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Application Information

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IPC IPC(8): H01F6/06
Inventor 宋萌胡南南苏路顺曹昆南王达达任丽沈石峰赵翔
Owner YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST
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