EP0921535A2 - Bobine supraconductrice haute temperature critique et procédé pour la fabrication d'une telle bobine - Google Patents
Bobine supraconductrice haute temperature critique et procédé pour la fabrication d'une telle bobine Download PDFInfo
- Publication number
- EP0921535A2 EP0921535A2 EP98402909A EP98402909A EP0921535A2 EP 0921535 A2 EP0921535 A2 EP 0921535A2 EP 98402909 A EP98402909 A EP 98402909A EP 98402909 A EP98402909 A EP 98402909A EP 0921535 A2 EP0921535 A2 EP 0921535A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- htc
- metallic material
- oxidized
- coil
- strand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
Definitions
- the invention relates to a high superconductive coil. critical temperature, and a method for manufacturing of such a coil.
- a high temperature superconductive coil critical includes at least one strand winding HTc superconducting multifilament.
- the HTc superconducting multifilament strand includes a plurality of HTc superconductive ceramic filaments drowned in a silver matrix.
- the HTc superconducting multifilament strand is produced using "Powder In Tube” technology Tube, PIT). This consists of filling a billet of reagents powdery likely, after heat treatment, to transform into ceramic-type superconductive material HTc. This billet is then closed under vacuum and stretched, bundled in a new billet itself closed vacuum and stretched in turn. The multifilament strand resulting can undergo the same steps, and so on up to the number of filaments per unit area desired.
- the strand thus produced is then shaped final then heat treated for processing powdery reagents in HTc superconductive ceramic.
- the HTc superconducting multifilament strand is first heat treated then the coil and made from the superconducting multifilament strand in phase superconductive.
- This manufacturing method makes it possible to get rid of insulation problems of the constituent turns of the winding. Indeed the insulation can be related to cold when building the coil.
- this manufacturing method induces mechanical stresses in the multifilament strand HTc superconductor in superconductive phase, harmful to electrical performance of the coil thus produced.
- the coil is made with a strand HTc superconducting multifilament in non-phase superconductive, then the coil thus produced is processed thermally in order to synthesize the powdery reagents in HTc superconductive ceramic.
- This second embodiment makes it possible to overcome of a large part of the mechanical stress problems in the coil and therefore improve performance intrinsic electrical components of the coil.
- the ceramic paper is no longer self-supporting and therefore the coil is very difficult to handle, especially during the stages consolidation and reinforcement, for example by resin injection.
- EP-A-0772208 describes a coil and a method of "react and wind” manufacturing of a superconductive coil HTc.
- the HTc multifilament strand is co-wound with a solid sheet of metallic material whose surface has been previously oxidized.
- EP-A-0772208 improves the mechanical strength of the coil while reducing the thicknesses required for the insulation (of the order of 0.03 mm).
- the fraction of the liquid phase precursors flows through capillarity between the oxidized metal sheet and the matrix of silver, thereby inducing pollution of the precursors by metal oxide, and a variation in the composition stoichiometric of the precursors which can affect substantially synthesis in the superconducting phase.
- the purpose of the present invention is to provide a process for manufacturing a multifilament strand coil HTc overcoming the drawbacks resulting from the above process, and a coil thus produced.
- the oxidized metallic material is a ventilated material.
- the metallic material oxidized aerated consists of a plurality of metallic wires oxidized woven fabrics.
- the material aerated oxidized metal is an expanded oxidized metal.
- the oxidized metallic material is chosen from Fe, Ni, Al, Cu, or a mixture thereof.
- the material aerated metal can be pretreated pre-oxidation.
- Oxidation of aerated metallic material can be done together with synthetic heat treatment.
- aerated oxidized metallic material is meant a metallic material at least surface non-oxidized, with through holes.
- the multifilament strand is made according to any known method, in particular the PIT (Powder In Tube) methods.
- the material aerated oxidized metallic 6 consists of a plurality of oxidized metal wires 7 woven together.
- the fabric as well performed allows oxygen circulation between the coil turns during synthetic heat treatment and oxidation.
- the material ventilated oxidized metal 6 is an expanded oxidized metal 8.
- the expanded metal mesh allows circulation of oxygen between the turns of the coil during processing thermal synthesis and oxidation.
- the metallic material intended to be oxidized is chosen among the most oxidizable metals, especially among Fe, Ni, Al, Cu, or a mixture thereof.
- the invention also relates to a manufacturing method of a HTc superconducting multifilament strand coil as described above.
- the material aerated metallic 6 undergoes a preliminary heat treatment of pre-oxidation.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
l'amélioration du rapport d'Ampère.tours/volume est, pour partie, fonction de l'épaisseur de l'isolant. Plus l'épaisseur de l'isolant est fine, plus le rapport ci-dessus est favorable. Les papiers céramiques commercialisés sont de l'ordre de 0,3 mm ce qui est bien trop important. Il faudrait que l'épaisseur de l'isolant de dépasse pas 0,1 mm. Or un papier céramique de cette épaisseur est très fragile et ne permet pas une utilisation industrielle en grande série à des coûts de production abordable.
la synthèse des précurseurs en phase supraconductrice nécessite de l'oxygène. Cet oxygène est transporté vers les précurseurs à travers la matrice d'argent du brin multifilamentaire. Or, dans le procédé proposé par EP-A-0772208, seule l'épaisseur du brin multifilamentaire est en contact avec l'atmosphère oxygénée entourant la bobine. Le reste du brin est intercalé entre deux feuilles métalliques pleines, peu accessibles à l'oxygène.
Claims (6)
- Bobine à brin multifilamentaire supraconducteur HTc comprenant au moins un enroulement (1) constituécaractérisé en ce que le matériau métallique oxydé (6) est un matériau aéré.d'une pluralité de spires (2,2a,2b) réalisées à partir d'un brin multifilamentaire supraconducteur HTc (3), ledit brin (3) comprenant une pluralité de filaments supraconducteurs HTc (4) noyés dans une matrice d'argent (5), etun matériau métallique oxydé (6), au moins en surface, intercalé entre les spires (2,2a,2b), isolant électriquement les spires (2,2a,2b) les une des autres,
- Bobine à brin multifilamentaire supraconducteur HTc selon la revendication 1 caractérisé en ce que le matériau métallique oxydé aéré (6) est constitué d'une pluralité de fils métalliques oxydés (7) tissés.
- Bobine à brin multifilamentaire supraconducteur HTc selon la revendication 1 caractérisée en ce que le matériau métallique oxydé aéré (6) est un déployé en métal oxydé (8).
- Bobine à brin multifilamentaire supraconducteur HTc selon l'une quelconque des revendications 1 à 3 caractérisée en ce que le matériau métallique qui a été oxydé est choisi parmi Fe, Ni, Al, Cu, ou un mélange de ceux-ci.
- Procédé de fabrication d'une bobine à brin multifilamentaire supraconducteur HTc (3) selon l'une quelconque des revendications 1 à 3 a caractérisé en ce queon enroule conjointement un brin multifilamentaire HTc (3) non synthétisé avec le matériau métallique aéré (6,7,8) réalisant ainsi une bobine à brin multifilamentaire supraconducteur HTc (3) non synthétisée, eton effectue un traitement thermique de la bobine ainsi réalisée pour synthétiser le brin supraconducteur HTc (3) en phase supraconductrice et pour oxyder, au moins en surface, le matériau métallique aéré (6,7,8).
- Procédé selon la revendication 5 caractérisé en ce que le matériau métallique aéré (6) subit un traitement thermique préalable de pré-oxydation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9715293 | 1997-12-04 | ||
| FR9715293A FR2772180B1 (fr) | 1997-12-04 | 1997-12-04 | Bobine supraconductrice haute temperature critique, et procede pour la fabrication d'une telle bobine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0921535A2 true EP0921535A2 (fr) | 1999-06-09 |
| EP0921535A3 EP0921535A3 (fr) | 1999-06-23 |
Family
ID=9514153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98402909A Withdrawn EP0921535A3 (fr) | 1997-12-04 | 1998-11-23 | Bobine supraconductrice haute temperature critique et procédé pour la fabrication d'une telle bobine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0921535A3 (fr) |
| JP (1) | JPH11260628A (fr) |
| CA (1) | CA2253682A1 (fr) |
| FR (1) | FR2772180B1 (fr) |
| NO (1) | NO985654L (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019150123A1 (fr) * | 2018-02-01 | 2019-08-08 | Tokamak Energy Ltd | Bobines hts partiellement isolées |
| EA039430B1 (ru) * | 2018-11-19 | 2022-01-26 | Токемек Энерджи Лтд | Высокотемпературная сверхпроводящая обмотка возбуждения |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2254633C1 (ru) * | 2003-10-27 | 2005-06-20 | Российский научный центр "Курчатовский институт" | Способ изготовления сверхпроводящих обмоток (варианты) |
| GB2590633A (en) | 2019-12-20 | 2021-07-07 | Tokamak Energy Ltd | HTS linked partial insulation for HTS field coils |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01321605A (ja) * | 1988-06-23 | 1989-12-27 | Furukawa Electric Co Ltd:The | 酸化物系セラミックス超電導体コイルの製造方法 |
| JPH0221512A (ja) * | 1988-07-08 | 1990-01-24 | Sumitomo Electric Ind Ltd | 酸化物超電導体 |
| JP3386942B2 (ja) * | 1995-10-30 | 2003-03-17 | 株式会社日立製作所 | 酸化物超電導コイル及びその製造方法 |
-
1997
- 1997-12-04 FR FR9715293A patent/FR2772180B1/fr not_active Expired - Fee Related
-
1998
- 1998-11-23 EP EP98402909A patent/EP0921535A3/fr not_active Withdrawn
- 1998-12-03 NO NO985654A patent/NO985654L/no not_active Application Discontinuation
- 1998-12-03 JP JP10344234A patent/JPH11260628A/ja active Pending
- 1998-12-03 CA CA002253682A patent/CA2253682A1/fr not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019150123A1 (fr) * | 2018-02-01 | 2019-08-08 | Tokamak Energy Ltd | Bobines hts partiellement isolées |
| CN112041947A (zh) * | 2018-02-01 | 2020-12-04 | 托卡马克能量有限公司 | 部分绝缘hts线圈 |
| AU2019214510B2 (en) * | 2018-02-01 | 2021-04-08 | Tokamak Energy Ltd | Partially-insulated HTS coils |
| US11101060B2 (en) | 2018-02-01 | 2021-08-24 | Tokamak Energy Ltd | Partially-insulated HTS coils |
| EA039430B1 (ru) * | 2018-11-19 | 2022-01-26 | Токемек Энерджи Лтд | Высокотемпературная сверхпроводящая обмотка возбуждения |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0921535A3 (fr) | 1999-06-23 |
| CA2253682A1 (fr) | 1999-06-04 |
| FR2772180B1 (fr) | 2000-01-14 |
| JPH11260628A (ja) | 1999-09-24 |
| NO985654D0 (no) | 1998-12-03 |
| NO985654L (no) | 1999-06-07 |
| FR2772180A1 (fr) | 1999-06-11 |
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