Alignment of HTS tapes

Patent metadata

Field	Value
Publication number	US-12260971-B2
Application number	US-201917273630-A
Country	US
Kind code	B2
Filing date	Aug 30, 2019
Priority date	Sep 4, 2018
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

A cable for carrying electrical current in a coil of a magnet. The cable comprises a stack of tape assemblies. Each tape assembly has a length and a width, such that the length is much larger than the width, and each tape assembly comprises an HTS layer of anisotropic high temperature superconductor. HTS material, wherein a c-axis of the HTS layer is at a non-zero angle to a vector perpendicular to the plane of the HTS layer. The tape assemblies are stacked as a series of pairs, each pair comprising first and second HTS tape assemblies and a copper layer therebetween. The tape assemblies in each pair are arranged such that the c-axis of the HTS layer of the first HTS tape assembly of each pair have reflective symmetry to the c-axis of the HTS layer of the second HTS tape assembly of each pair about a plane which is parallel to and equidistant from each HTS layer.

First claim

The invention claimed is:

1. A cable for carrying electrical current in a coil of a magnet, comprising:
a stack of tape assemblies, each tape assembly having a length and a width, such that the length is much larger than the width and each tape assembly comprises an HTS layer of anisotropic high temperature superconductor, HTS material, wherein a c-axis of the HTS layer is at a non-zero angle to a vector perpendicular to the plane of the HTS layer;
wherein the tape assemblies are stacked as a series of pairs, each pair comprising first and second HTS tape assemblies and a copper layer therebetween;
wherein the tape assemblies in each pair are arranged such that the c-axis of the HTS layer of the first HTS tape assembly of each pair have reflective symmetry to the c-axis of the HTS layer of the second HTS tape assembly of each pair about a plane which is parallel to and equidistant from each HTS layer.

2. The cable according to claim 1 , wherein each HTS tape assembly comprises a substrate.

3. The cable according to claim 2 , wherein each pair is arranged such that the HTS layers of the HTS tape assemblies are arranged between the substrates of the HTS tape assemblies.

4. The cable according to claim 2 , wherein each pair is arranged such that the substrates of the tape assemblies are arranged between the HTS layers of the HTS tape assemblies.

5. The cable according to claim 2 , wherein each pair is arranged such that one HTS layer is arranged between the substrates of the HTS tape assemblies, and the other HTS layer is arranged outside the substrates of the HTS tape assemblies.

6. The cable according to claim 1 , wherein the HTS material is one of:
ReBCO; and
BSCCO.

7. The cable according to claim 1 , wherein each HTS tape assembly comprises exfoliated HTS tape.

8. The cable according to any claim 1 , wherein the thickness of the copper layer is between 10 microns and 400 microns.

9. The cable according to claim 1 , wherein the copper layer comprises a copper lamination between the first and second HTS tape assemblies.

10. The cable according to claim 1 , wherein each HTS tape assembly comprises a copper cladding, and the HTS layer comprises a portion of the copper cladding of each of the first and second HTS tape assemblies.

11. A method of manufacturing a cable for carrying electric current in a coil of a magnet, the method comprising:
providing one or more pairs of tape assemblies, each pair comprising a first tape assembly and a second tape assembly, each tape assembly comprising a high-strength metal substrate layer, and an HTS layer of anisotropic high temperature superconductor, HTS, material, wherein a c-axis of the HTS layer is at a non-zero angle to a vector perpendicular to the plane of the HTS layer;
for each pair:
applying the first tape assembly to a copper layer; and
applying the second tape assembly to the copper layer, such that the HTS layer of the first tape and the HTS layer of the second tape are parallel and separated by the copper layer, and such that a c-axis of the second HTS tape assembly has reflective symmetry to the c-axis of the HTS layer of the second HTS tape assembly of each pair about a plane which is parallel to and equidistant from each HTS layer;

stacking the pairs of tape assemblies to form the cable.

12. The method according to claim 11 , wherein the first and second HTS tape assemblies are applied to the copper layer such that the respective HTS layer is between the respective substrate layer and the copper layer.

13. The method according to claim 11 , wherein the first and second HTS tape assemblies are applied to the copper layer such that the respective substrate layer is between the respective HTS layer and the copper layer.

14. The method according to claim 11 , wherein the first and second HTS tape assemblies are applied to the copper layer such that the HTS layer of the first HTS tape assembly is between the substrate layer of the first HTS tape assembly and the copper layer, and the substrate layer of the second HTS tape assembly is between the HTS layer of the second HTS tape assembly and the substrate layer.

15. The method according to claim 11 , wherein each HTS tape assembly comprises exfoliated HTS tape.

16. The method according to claim 11 , and comprising partially transferring a master HTS tape assembly from a first reel to a second reel, separating the portion of the master HTS tape assembly on the first reel from the portion of the master HTS tape assembly on the second reel, and applying the first HTS tape assembly from the first reel and the second HTS tape assembly from the second reel.

17. The method according to claim 11 , wherein the first HTS tape assembly is applied in the opposite direction along the copper layer to the direction in which the second HTS tape assembly is applied.

18. The method according to claim 11 , wherein the first and second HTS tape assemblies are formed by folding a master HTS tape assembly about an axis in the plane of the HTS layer and perpendicular to the length of the master HTS tape assembly, and removing a region of the master HTS tape assembly containing the fold.

Assignees

• Tokamak Energy Ltd

Inventors

• Slade Robert
• Brittles Greg
• Van Nugteren Bas

Classifications

• H01F6/06

  Coils, e.g. winding, insulating, terminating or casing arrangements therefor · CPC title

• G21B1/21 Primary

  Electric power supply systems, e.g. for magnet systems, switching devices, storage devices, circuit arrangements {(methods or means for discharging superconducting storage windings H01F6/003)} · CPC title

• G21B1/057

  Tokamaks · CPC title

• Y02E40/60

  Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment · CPC title

• H01B12/02 Primary

  characterised by their form · CPC title