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MgB2 superconducting cable, manufacturing method thereof and joint structure

A technology for superconducting cables and manufacturing methods, which is applied in the directions of superconducting devices, cable/conductor manufacturing, and superconducting element usage, etc. The effect of carrying a large current

Active Publication Date: 2020-08-25
合肥夸夫超导科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the harsh atomic deposition and biaxial texture epitaxial growth process, the yield of ReBCO superconducting tapes on the market is low. Although its cost performance has been improved compared with Bi-2223 tapes, ReBCO superconducting tapes Material prices are still high

Method used

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  • MgB2 superconducting cable, manufacturing method thereof and joint structure
  • MgB2 superconducting cable, manufacturing method thereof and joint structure
  • MgB2 superconducting cable, manufacturing method thereof and joint structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] In this embodiment, a kind of MgB 2 A method for manufacturing a superconducting cable, comprising the steps of:

[0069] (1) Make the superconducting cable body: Take an oxygen-free copper tube with a diameter of 10 mm. The holes are evenly distributed up and down the copper tube. The size of the holes is 1 mm, and the distance between the holes is 1 cm; then take the Cu tube as the center , 10 MgB2 superconducting wires are twisted on the Cu tube, and the twisting intercept is 100 mm;

[0070] (2) Cable insulation: Wrap a layer of low-temperature insulating tape around the twisted MgB2 wire in step 1 for insulation. The breakdown voltage of the insulating tape is 100 V;

[0071] (3) Penetrating the corrugated tube A: Insert the superconducting cable with insulating layer produced in step 2 into the corrugated tube A with a diameter of 15 mm; (Note: A is a cold helium cooling tube)

[0072] (4), threading stainless steel pipe B: thread the superconducting cable conta...

Embodiment 2

[0080] In this embodiment, a kind of MgB 2 A method for manufacturing a superconducting cable, comprising the steps of:

[0081] (1) To make the superconducting cable body: Take an oxygen-free copper tube with a diameter of 15 mm. The holes are evenly distributed up and down the copper tube. The size of the holes is 3 mm, and the distance between the holes is 5 cm; then take the Cu tube as the center , 20 MgB2 superconducting wires are twisted on the Cu tube, and the twisting intercept is 10 mm;

[0082] (2) Cable insulation: Wrap 5 layers of low-temperature insulating tape around the twisted MgB2 wire in step 1 for insulation, and the breakdown voltage of the insulating tape is 500 V;

[0083] (3) Penetrating the corrugated tube A: Insert the superconducting cable with insulating layer produced in step 2 into the corrugated tube A with a diameter of 20 mm; (Note: A is a cold helium cooling tube)

[0084] (4), threading stainless steel pipe B: thread the superconducting cabl...

Embodiment 3

[0092] In this embodiment, a kind of MgB 2 A method for manufacturing a superconducting cable, comprising the steps of:

[0093] (1) Make the superconducting cable body: Take an oxygen-free copper tube with a diameter of 15 mm. The holes are evenly distributed up and down the copper tube. The size of the holes is 5 mm, and the distance between the holes is 10 cm; then take the Cu tube as the center , 24 MgB2 superconducting wires are twisted on the Cu tube, and the twisting intercept is 50 mm;

[0094] (2) Cable insulation: Wrap 6 layers of low-temperature insulating tape around the twisted MgB2 wire in step 1 for insulation. The breakdown voltage of the insulating tape is 600 V;

[0095] (3) Penetrating the corrugated tube A: Insert the superconducting cable with insulating layer produced in step 2 into the corrugated tube A with a diameter of 20 mm; (Note: A is a cold helium cooling tube)

[0096] (4), threading stainless steel pipe B: thread the superconducting cable cont...

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Abstract

The invention discloses an MgB2 superconducting cable, a manufacturing method thereof and a joint structure. The practical MgB2 superconducting cable is manufactured by twisting 10-30 MgB2 wires on acopper pipe with a plurality of holes, then sequentially transmitting the MgB2 wires into an inner-layer cold helium cooling pipe, a vacuum heat insulation layer, a liquid nitrogen cooling layer and avacuum heat insulation layer pipe, and finally, manufacturing a plurality of cold helium and liquid nitrogen inlets / outlets and superconducting joints. The method is simple in manufacturing method and low in raw material cost, has a series of advantages of light cable weight, small voltage, small bending radius and the like, and has a wide application prospect in the fields of intelligent power grids, urban power consumption dense areas, big data center trunk cables and the like in the future.

Description

technical field [0001] The invention relates to the technical field of high temperature superconducting cables, in particular to a MgB 2 Superconducting cable, its manufacturing method and joint structure. Background technique [0002] MgB 2 Superconducting materials have the advantages of high superconducting transition temperature (39 K), no weak connection of grains, easy processing and low cost, especially at the working temperature of 20-30 K and under the self-field, they can carry very high critical current. Example: MgB with a diameter of 1.0 mm 2 Superconducting wire, the critical engineering current density can reach 50,000 A / cm at 25 K and self-field 2 , that is, the carrying current can reach up to 500A; the current carrying capacity can reach 100 times that of copper wire; the unit price is 30 yuan / m. In particular, superconducting materials can generate extremely low voltage (less than 0.001 V) while transmitting DC power and carrying large currents. Ther...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B12/00H02G15/04
CPCH01B12/00H01B13/00H02G15/046Y02E40/60
Inventor 潘熙锋庄彬林鹤许涛赵勇
Owner 合肥夸夫超导科技有限公司
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