EP0472197B1 - Bobine supra-conductrice à haute température - Google Patents
Bobine supra-conductrice à haute température Download PDFInfo
- Publication number
- EP0472197B1 EP0472197B1 EP19910114090 EP91114090A EP0472197B1 EP 0472197 B1 EP0472197 B1 EP 0472197B1 EP 19910114090 EP19910114090 EP 19910114090 EP 91114090 A EP91114090 A EP 91114090A EP 0472197 B1 EP0472197 B1 EP 0472197B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature ceramic
- superconductive conductor
- conductor winding
- superconducting wire
- temperature
- 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.)
- Expired - Lifetime
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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 present invention relates to a high-temperature superconductive conductor winding, and more specifically, it relates to improvement of properties, particularly the critical current property, of such a high-temperature superconductive conductor winding.
- a high-temperature superconductive material which is known as a ceramic superconductor, is coated with a metal and strongly worked into a thin tape by deformation processing. It has been recognized possible to attain a high critical current density by combining such deformation processing with heat treatment.
- a single high-temperature wire is adapted to form two coil portions. Therefore, a throughout portion (crossover portion) extending from one coil portion to the other coil portion is required.
- the critical current density is reduced due to shearing stress which is applied to the "throughout portion", since the wire is necessarily twisted at the "throughout portion".
- an object of the present invention is to provide a high-temperature superconductive conductor winding obtained by winding a tape-type high-temperature superconducting wire into the form of a double pancake coil, which can suppress generation of shearing stress in a crossover portion, thereby preventing reduction of the critical current density.
- the present invention is directed to a high-temperature ceramic superconductive conductor winding obtained by winding a tape-type high-temperature ceramic superconducting wire, which is combined with a metal, into the form of a double pancake coil. According to the present invention, it is noted that the length of a crossover portion is deeply concerned with the aforementioned shearing stress, as well as the critical current density.
- the length of a crossover portion which is provided between pancakes is selected to be at least four times the width of the tape-type high-temperature superconducting wire, in order to solve the aforementioned technical problem.
- the high-temperature superconducting wire may be covered with an insulating material of an inorganic substance such as mica, glass fiber or quartz fiber, or an organic substance such as tetrafluoroethylene, polyimde resin or formal resin.
- the inventive high-temperature superconductive conductor winding is preferably impregnated with epoxy resin. More preferably, the epoxy resin contains fiber and/or powder.
- a high-temperature superconductor contained in the high-temperature superconducting wire may be divided in a multicore state.
- the length of the crossover portion is selected to be at least four times the width of the tape-type high-temperature superconducting wire, whereby it is possible to suppress generation of shearing stress at the crossover portion, thereby preventing reduction of the critical current density caused by such shearing stress.
- the high-temperature superconducting wire is preferably provided with an insulating coat, so that the same can be directly wound into a coil with no specific insulating material.
- the high-temperature superconductive conductor winding according to the present invention is preferably impregnated with epoxy resin, so that the winding is resistant against stress which may be applied thereto in preparation of such a winding or during excitation.
- the epoxy resin contains fiber and/or powder, so that the winding is further resistant against the aforementioned stress.
- the high-temperature superconductor which is contained in the high-temperature superconducting wire is preferably divided in a multicore state, so that the high-temperature superconductor is improved in strain resistance and can be wound with no problem after sintering.
- Figs. 1 and 2 illustrate a high-temperature superconductive conductor winding 1 according to an embodiment of the present invention.
- Fig. 1 is a front elevational view
- Fig. 2 is a top plan view.
- This high-temperature superconductive conductor winding 1 is formed by winding a tape-type high-temperature superconducting wire 2, which is combined with a metal, on a cylindrical spool 3 into the form of a double pancake coil.
- the single tape-type high-temperature superconducting wire 2 is wound on the spool 3 from its inner peripheral side to form an upper pancake, i.e., a first coil portion 4.
- a crossover portion 5, which is connected with the beginning end of the first coil portion 4, is guided to obliquely downwardly extend on the spool 3.
- the high-temperature superconducting wire 2 is then wound on the outer peripheral surface of the spool 3 from the inner peripheral side inversely to the first coil portion 4, thereby forming a lower pancake, i.e., a second coil portion 6.
- clearances are defined along the first and second coil portions 4 and 6 due to formation of the crossover portion 5, while spacers 7 and 8 are inserted to absorb such clearances.
- flanges are generally formed on both end portions thereof.
- the term "length of the crossover portion” indicates the length of the center line of the crossover portion 5, shown in Fig. 1, in a part exposed from the first and second coil portions 4 and 6.
- Oxides or carbonates containing Bi, Pb, Sr, Ca and Cu were so mixed that these elements were in composition ratios of 1.82:0.43:2.01:2.22:3.03, and this mixture was heat treated to prepare powder having a 2212 phase being composed of Bi, Pb, Sr, Ca and Cu substantially in the ratios of 2:2:1:2, and non-superconducting phases.
- This powder was degassed under a decompressed atmosphere of 2 Torr at 700°C for 3 hours.
- the as-formed powder was filled into silver pipes. 1296 such silver pipes were charged into a large silver pipe of 12 mm in outer diameter and 10 mm in inner diameter, which in turn was drawn into an outer diameter of 1 mm and then rolled into a thickness of 0.18 mm.
- the as-formed tape-type wire was heat treated at 840°C for 50 hours, and then rolled into a tape-type wire of 4 mm in width and 0.15 mm in thickness. This tape-type wire was then heat treated at 840°C for 50 hours.
- This tape-type wire was coated with a formal resin film of 0.1 mm in thickness and wound on a bobbin of 15 mm in outer diameter, to prepare a double pancake coil so that each pancake had ten turns.
- Some samples of such double pancake coils were prepared with crossover portions of various lengths, to measure J C,coil /J CO (critical current density in the coil form/critical current density of the wire itself).
- a tape-type wire of 4.3 mm in width and 0.14 mm in thickness was prepared in a similar manner to Example 1, and coated with a polyimide resin film in place of the formal resin film, to prepare a double pancake coil which was similar to Example 1. According to Example 2, the coil was impregnated with epoxy resin containing glass fiber.
- Table 2 shows results of evaluation of the as-formed samples.
- a single-core wire was prepared through steps similar to those of Example 1. This wire was rolled into a thickness of 0.18 mm, coated with quartz fiber, and worked into a double pancake coil, which was heat treated at 840°C for 50 hours.
- the coil exhibited an excellent critical current density exceeding 90 % of that of the wire itself when the length of the crossover portion was set to be at least four times the width of the wire.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Claims (5)
- Une bobine supraconductrice à double galette
comprenant un enroulement supraconducteur constitué de céramique supraconductrice à haute température critique (1), lequel comprend un fil supraconducteur en céramique supraconductrice à haute température critique (2) ayant la forme d'un ruban, lequel fil est accompagné d'un métal et enroulé pour former une bobine à double galette, dans laquelle
la longueur de la portion transversale (5) située entre les galettes (4, 6) est d'au moins quatre fois la largeur dudit fil supraconducteur constitué de céramique supraconductrice à haute température critique (2), lequel se présente sous la forme d'un ruban. - Un enroulement supraconducteur à base de céramique supraconductrice à haute température critique (1) selon la revendication 1, dans lequel ledit fil supraconducteur à base de céramique supraconductrice à haute température critique (2), est doté d'un revêtement isolant.
- Un enroulement supraconducteur à base de céramique supraconductrice à haute température critique (1) selon la revendication 1, dans lequel ledit enroulement est imprégné de résine époxy.
- Un enroulement supraconducteur à base de céramique supraconductrice à haute température critique (1) selon la revendication 3, dans lequel ladite résine époxy contient des fibres et/ou des poudres.
- Un enroulement supraconducteur à base de céramique supraconductrice à haute température critique (1) selon la revendication 1, dans lequel un supraconducteur à base de céramique supraconductrice à haute température critique constituant ledit fil supraconducteur à base de céramique supraconductrice à haute température critique (2) est constitué de plusieurs brins.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22348190A JP3309390B2 (ja) | 1990-08-24 | 1990-08-24 | 高温超電導導体巻線 |
JP223481/91 | 1990-08-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0472197A1 EP0472197A1 (fr) | 1992-02-26 |
EP0472197B1 true EP0472197B1 (fr) | 1994-12-21 |
Family
ID=16798810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19910114090 Expired - Lifetime EP0472197B1 (fr) | 1990-08-24 | 1991-08-22 | Bobine supra-conductrice à haute température |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0472197B1 (fr) |
JP (1) | JP3309390B2 (fr) |
DE (1) | DE69106080T2 (fr) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ296653A (en) † | 1994-10-13 | 1999-01-28 | American Superconductor Corp | Superconducting magnetic coil assembly has pancake coils of different cross sections |
US5581220A (en) * | 1994-10-13 | 1996-12-03 | American Superconductor Corporation | Variable profile superconducting magnetic coil |
US5604473A (en) * | 1994-10-13 | 1997-02-18 | American Superconductor Corporation | Shaped superconducting magnetic coil |
DE19502549A1 (de) * | 1995-01-27 | 1996-08-01 | Siemens Ag | Magneteinrichtung mit forciert zu kühlender supraleitender Wicklung |
JP4622020B2 (ja) * | 1999-02-26 | 2011-02-02 | 住友電気工業株式会社 | 絶縁被膜を有する酸化物超電導線材およびその製造方法 |
ATE373310T1 (de) * | 2000-02-04 | 2007-09-15 | Iwate Tokyo Wire Works Ltd | Umhüllter supraleitender draht |
DE102004011940A1 (de) * | 2004-03-09 | 2005-09-29 | Thyssenkrupp Transrapid Gmbh | Magnetpol für Magnetschwebefahrzeug |
DE102005052602B3 (de) * | 2005-11-02 | 2007-03-08 | Trithor Gmbh | Spule zum Erzeugen eines Magnetfeldes |
FR2895802B1 (fr) | 2005-12-30 | 2008-11-07 | Commissariat Energie Atomique | Procede et dispositif de creation d'un champ magnetique homogene dans une zone d'interet, notamment pour l'imagerie rmn |
JP2008026234A (ja) * | 2006-07-24 | 2008-02-07 | Sumitomo Electric Ind Ltd | 絶縁不良検出方法および装置 |
JP2008130785A (ja) * | 2006-11-21 | 2008-06-05 | Sumitomo Electric Ind Ltd | 超電導コイルおよび該超電導コイルを備えた超電導機器 |
JP4893301B2 (ja) * | 2006-12-28 | 2012-03-07 | 住友電気工業株式会社 | 超電導コイルの製造方法 |
JP2010093036A (ja) * | 2008-10-08 | 2010-04-22 | Sumitomo Electric Ind Ltd | 超電導コイル、超電導マグネット、エポキシ樹脂ワニスおよびその製造方法 |
DE102010040272B4 (de) * | 2010-09-06 | 2018-04-19 | Siemens Aktiengesellschaft | Hochtemperatur-Supraleiter (HTS)-Spule |
DE102011079323B3 (de) * | 2011-07-18 | 2013-01-03 | Siemens Aktiengesellschaft | Supraleitende Spulenanordnung und Verfahren zu deren Herstellung |
JP6539024B2 (ja) * | 2014-08-08 | 2019-07-03 | 住友電気工業株式会社 | コイル、及びコイル部品 |
JP2020047739A (ja) * | 2018-09-18 | 2020-03-26 | 株式会社東芝 | 超電導コイル、及び、超電導機器 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3281737A (en) * | 1963-09-26 | 1966-10-25 | Gen Electric | Superconductive solenoid |
US3813764A (en) * | 1969-06-09 | 1974-06-04 | Res Inst Iron Steel | Method of producing laminated pancake type superconductive magnets |
JPS5732607A (en) * | 1980-08-05 | 1982-02-22 | Japan Atom Energy Res Inst | Superconductive coil |
US4499443A (en) * | 1984-01-31 | 1985-02-12 | The United States Of America As Represented By The United States Department Of Energy | High-field double-pancake superconducting coils and a method of winding |
-
1990
- 1990-08-24 JP JP22348190A patent/JP3309390B2/ja not_active Expired - Fee Related
-
1991
- 1991-08-22 EP EP19910114090 patent/EP0472197B1/fr not_active Expired - Lifetime
- 1991-08-22 DE DE1991606080 patent/DE69106080T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69106080T2 (de) | 1995-05-18 |
JPH04106906A (ja) | 1992-04-08 |
DE69106080D1 (de) | 1995-02-02 |
EP0472197A1 (fr) | 1992-02-26 |
JP3309390B2 (ja) | 2002-07-29 |
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