JPH0653025A - Joint structure of superconductor - Google Patents
Joint structure of superconductorInfo
- Publication number
- JPH0653025A JPH0653025A JP4206502A JP20650292A JPH0653025A JP H0653025 A JPH0653025 A JP H0653025A JP 4206502 A JP4206502 A JP 4206502A JP 20650292 A JP20650292 A JP 20650292A JP H0653025 A JPH0653025 A JP H0653025A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- connecting portion
- magnetic field
- magnetic shield
- fluctuating
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、超電導導体をはんだ
付けしてなる超電導導体の接続部構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting conductor connecting portion structure obtained by soldering a superconducting conductor.
【０００２】[0002]
【従来の技術】図８は、例えば、第１１回国際電磁石技
術会議（１１ｔｈ ＩＮＴＥＲＮＡＴＩＯＮＡＬ ＣＯ
ＮＦＥＲＥＮＣＥ ＯＮ Ｍａｇｎｅｔ Ｔｅｃｈｎｏ
ｌｏｇｙ）の８４７〜８５１ぺージに記載された論文
「デモポロイダルコイルの製造(FABRICATION OF DEMO P
OLOIDAL COILS,)」ＤＰＣ−Ｕ１ ＡＮＤ Ｕ２の図．９
（８５０ぺージ参照）において示された従来の超電導導
体を示す斜視図、図９はその縦断面図である。2. Description of the Related Art FIG. 8 shows, for example, the 11th International Electromagnetic Technical Conference (11th INTERNATIONAL CO
NFERENCE ON MAGNET TECHNO
, pp. 847-851, "Manufacturing of demo poloidal coils (FABRICATION OF DEMO P
OLOIDAL COILS,) ”DPC-U1 AND U2 diagram. 9
(Refer to page 850) The perspective view which shows the conventional superconducting conductor shown in FIG.
【０００３】図において、符号１は超電導素線、２は超
電導素線１が集合・撚線された超電導線２（超電導
体）、３ははんだ接続された２本の超電導線２の接続
部、４は２本の超電導線を接続する鉛錫はんだ、そし
て、符号５ははんだ接続の際に鉛錫はんだ４を支持する
銅シースである。接続部３は鉛錫はんだ４によって電気
的機械的に接続され、接続作業中、銅シース５によって
支持されている。In the figure, reference numeral 1 is a superconducting element wire, 2 is a superconducting wire 2 (superconductor) in which the superconducting element wires 1 are assembled and twisted, and 3 is a connecting portion of two superconducting wires 2 which are soldered together. Reference numeral 4 is a lead-tin solder that connects the two superconducting wires, and reference numeral 5 is a copper sheath that supports the lead-tin solder 4 during solder connection. The connecting portion 3 is electrically and mechanically connected by the lead-tin solder 4, and is supported by the copper sheath 5 during the connecting work.
【０００４】このような構成により接続された超電導線
２は、液体ヘリウム等の冷媒によって約−２７６°Ｃの
極低温に冷却されると、超電導素線１が超電導状態にな
り、抵抗損失無しで電流を流すことができる。通常、こ
の性質を利用して超電導線２を巻回してマグネットが製
作されるが、一本の超電導線２の長さには限度があり、
また、マグネットの製作上および構造上の制約から必ず
数カ所に接続部３が設けられる。When the superconducting wire 2 connected by such a structure is cooled to a cryogenic temperature of about -276 ° C. by a coolant such as liquid helium, the superconducting element wire 1 is brought into a superconducting state without resistance loss. An electric current can be passed. Normally, a magnet is manufactured by using this property to wind the superconducting wire 2, but the length of one superconducting wire 2 is limited,
Further, the connecting portions 3 are always provided at several places due to restrictions in manufacturing and structure of the magnet.
【０００５】この場合、超電導線２の接続には様々な方
法が利用されているが、はんだ接続が最も一般的に使用
されている。特に、１０００Ａを越える大電流を流す超
電導線２の接続によく使用される。In this case, although various methods are used to connect the superconducting wires 2, solder connection is most commonly used. Particularly, it is often used for connecting the superconducting wire 2 which allows a large current exceeding 1000 A to flow.
【０００６】ところで、はんだは０．１Ｔ以上の磁界中
では常電導物質であり、電流を通電した場合は必ずジュ
ール熱を発生する。ただし、極低温におけるはんだの電
気抵抗率は７×１０-9Ωｍと小さく、上記従来の接続部
の例では１．４×１０-10Ωｍの接続抵抗を示す。By the way, solder is a normally conductive substance in a magnetic field of 0.1 T or more, and always generates Joule heat when a current is applied. However, the electric resistivity of the solder at a very low temperature is as small as 7 × 10 −9 Ωm, and the example of the above-mentioned conventional connection portion shows a connection resistance of 1.4 × 10 −10 Ωm.
【０００７】この抵抗値は定格電流時（３０ＫＡ）に
０．１Ｗの発熱（直流電気抵抗損失）を生じるが、コイ
ルの動作には問題のない程度の極小さい抵抗値である。
また、超電導線２の接続部３は図示するように複数の超
電導素線１がはんだによって接続されているが、外部よ
り変動磁界が加わった場合、この接続部３に渦電流と超
電導線２を介して結合電流が流れ、数Ｗから数百の発熱
が生ずる。This resistance value is a very small resistance value which causes 0.1 W of heat generation (DC electric resistance loss) at the rated current (30 KA), but has no problem in the operation of the coil.
Further, as shown in the figure, the connecting portion 3 of the superconducting wire 2 has a plurality of superconducting element wires 1 connected by solder. However, when a fluctuating magnetic field is applied from the outside, the eddy current and the superconducting wire 2 are connected to the connecting portion 3. A coupling current flows through the heat generation, generating heat of several W to several hundreds.
【０００８】[0008]
【発明が解決しようとする課題】前記超電導線２の接続
部３は以上のように構成されているので、定常磁場にお
ける冷却状態では、電気抵抗損失の少ない状態で電流を
流すことができるが、外部から印加される変動磁界があ
る場合、変動磁界によるパルス損失によって数Ｗから数
百Ｗの熱が発生するため、接続部３の温度が上昇して接
続部３の超電導状態が常電導状態になり、その結果、コ
イル全体の安定性が損なわれるという課題があった。Since the connecting portion 3 of the superconducting wire 2 is constructed as described above, in the cooling state in the steady magnetic field, the electric current can flow in the state where the electric resistance loss is small. When there is a fluctuating magnetic field applied from the outside, heat of several W to several hundred W is generated due to pulse loss due to the fluctuating magnetic field, so that the temperature of the connecting portion 3 rises and the superconducting state of the connecting portion 3 becomes the normal conducting state. As a result, there is a problem that the stability of the entire coil is impaired.
【０００９】この発明は、上記のような課題を解決する
ためになされたもので、定常磁界時の発熱（直流電気抵
抗損失）を低いレベルに維持するとともに変動磁界によ
るパルス損失を防止若しくは緩和することを可能にした
超電導導体の接続部構造を提供することを目的とする。The present invention has been made to solve the above problems, and maintains heat generation (DC electrical resistance loss) in a steady magnetic field at a low level and prevents or mitigates pulse loss due to a fluctuating magnetic field. It is an object of the present invention to provide a connection structure for a superconducting conductor that enables the above.
【００１０】[0010]
【課題を解決するための手段】この発明に係る請求項第
１項記載の超電導導体の接続部構造は、超電導導体の接
続部の外部に超電導磁気シールドを設けることにより構
成されている。A superconducting conductor connecting portion structure according to a first aspect of the present invention is configured by providing a superconducting magnetic shield outside the connecting portion of the superconducting conductor.
【００１１】この発明に係る請求項第２項記載の超電導
導体の接続部構造は、超電導導体の接続部の外部に、超
電導線を巻回し、かつ、両端を短絡した超電導コイルを
設けることにより構成されている。A superconducting conductor connecting portion structure according to a second aspect of the present invention is constructed by providing a superconducting coil having a superconducting wire wound around the connecting portion of the superconducting conductor and having both ends short-circuited. Has been done.
【００１２】[0012]
【作用】この発明に係る請求項第１項記載の超電導導体
の接続部構造においては、接続部の外側に設けられた超
電導磁気シールドによって接続部に作用する変動磁界が
遮蔽又は緩和される。In the superconducting conductor connecting portion structure according to the first aspect of the present invention, the variable magnetic field acting on the connecting portion is shielded or relaxed by the superconducting magnetic shield provided outside the connecting portion.
【００１３】また、この発明に係る請求項第２項記載の
超電導導体の接続部構造においては、接続部の外側に設
けられた超電導コイルによって接続部に作用する変動磁
界が遮蔽又は緩和される。Further, in the superconducting conductor connecting portion structure according to the second aspect of the present invention, the variable magnetic field acting on the connecting portion is shielded or alleviated by the superconducting coil provided outside the connecting portion.
【００１４】[0014]
実施例１．図１および図２は、この発明に係る請求項第
１項記載の超電導導体の接続部構造の第１実施例を示
し、図１は接続部の縦断面図、図２はその斜視図であ
る。図において、前記従来例と同一部分および相当する
部分には同一符号を付し、その説明を省略する。また、
符号６は、超電導線２の接続部３に外部から印加される
変動磁界を遮蔽又は緩和する超電導磁気シールドであ
る。Example 1. 1 and 2 show a first embodiment of a connecting portion structure of a superconducting conductor according to the first aspect of the present invention, FIG. 1 is a longitudinal sectional view of the connecting portion, and FIG. 2 is a perspective view thereof. . In the figure, the same parts and corresponding parts as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted. Also,
Reference numeral 6 is a superconducting magnetic shield that shields or relaxes a fluctuating magnetic field applied to the connecting portion 3 of the superconducting wire 2 from the outside.
【００１５】超電導磁気シールド６は、接続部３の周囲
に、接続部３を完全に覆うように筒形状に設置されてい
る。また、超電導磁気シールド６は、例えばＮｂＴｉ
（ニオブトチタンの合金）と銅の薄膜との積層体または
酸化物高温超電導体（例えば、バリウムとランタンと銅
と酸素との合金）等から形成されている。The superconducting magnetic shield 6 is installed in a tubular shape around the connecting portion 3 so as to completely cover the connecting portion 3. Further, the superconducting magnetic shield 6 is made of, for example, NbTi.
It is formed of a laminated body of (an alloy of niobium titanium) and a thin film of copper or an oxide high temperature superconductor (for example, an alloy of barium, lanthanum, copper and oxygen).
【００１６】このように構成された超電導線２の接続部
３においては、定常磁場における冷却状態では、電気抵
抗喪失のきわめて少ない状態で電流を流すことができ
る。また、外部から印加される変動磁界がある場合、接
続部外周に設置された超電導磁気シールドによって変動
磁界が遮蔽又は緩和されるので、渦電流および結合電流
による熱が発生せず、たとえ、発生したとしてもきわめ
て小さいので、発生熱によってコイル全体の安定性が損
なわれるという問題は生じない。In the connecting portion 3 of the superconducting wire 2 constructed as described above, in the cooling state in the stationary magnetic field, the electric current can flow in the state in which the loss of electric resistance is extremely small. In addition, when there is a fluctuating magnetic field applied from the outside, the fluctuating magnetic field is shielded or relaxed by the superconducting magnetic shield installed on the outer periphery of the connection part, so heat due to eddy current and coupling current does not occur, However, since it is extremely small, the problem that the stability of the entire coil is impaired by the generated heat does not occur.
【００１７】実施例２．図３および図４は、この発明に
係る請求項第１項記載の超電導導体の接続部構造の第２
実施例を示し、図３は接続部の斜視図、図４はその一部
拡大斜視図である。図において、符号７は超電導線２の
接続部３に外部から印加される変動磁界を遮蔽又は緩和
する超電導磁気シールドである。Example 2. 3 and 4 show a second superconducting conductor connecting portion structure according to a first aspect of the present invention.
FIG. 3 is a perspective view of a connecting portion, and FIG. 4 is a partially enlarged perspective view thereof. In the figure, reference numeral 7 is a superconducting magnetic shield that shields or relaxes a fluctuating magnetic field applied to the connecting portion 3 of the superconducting wire 2 from the outside.
【００１８】超電導磁気シールド７は矩形板状に形成さ
れ、かつ、接続部３の側部に変動磁界の磁力線の方向を
遮るように、変動磁界の磁力線の方向と垂直に設置され
ている。また、超電導磁気シールド７は、例えばＮｂＴ
ｉ（ニオブトチタンの合金）の薄板７ａと薄銅板７ｂと
の積層体より構成されている（図４参照）。The superconducting magnetic shield 7 is formed in the shape of a rectangular plate, and is installed on the side of the connecting portion 3 perpendicularly to the direction of the magnetic field lines of the varying magnetic field so as to block the direction of the magnetic field lines of the varying magnetic field. Further, the superconducting magnetic shield 7 is, for example, NbT.
It is composed of a laminate of a thin plate 7a made of i (alloy of niobium titanium) and a thin copper plate 7b (see FIG. 4).
【００１９】この実施例は、変動磁界の磁力線の方向が
当初より明らかであることが前提であるが、この実施例
によれば、超電導磁気シールド７は、接続部３の製作後
に設けることができるので、製作工程を簡略化できる等
の効果がある。なお、超電導磁気シールド７として、酸
化物高温超電導体等から形成してもよい。This embodiment is based on the premise that the direction of the magnetic force lines of the fluctuating magnetic field is clear from the beginning, but according to this embodiment, the superconducting magnetic shield 7 can be provided after the connection portion 3 is manufactured. Therefore, there is an effect that the manufacturing process can be simplified. The superconducting magnetic shield 7 may be formed of an oxide high temperature superconductor or the like.
【００２０】実施例３．図５は、この発明に係る請求項
第１項記載の超電導導体の接続部構造の第３実施例を示
す接続部の斜視図である。図において、符号８は超電導
線２の接続部３に外部から印加される変動磁界を遮蔽又
は緩和する超電導磁気シールドである。Example 3. FIG. 5 is a perspective view of a connecting portion showing a third embodiment of the connecting portion structure of the superconducting conductor according to the first aspect of the present invention. In the figure, reference numeral 8 is a superconducting magnetic shield that shields or relaxes a fluctuating magnetic field applied to the connecting portion 3 of the superconducting wire 2 from the outside.
【００２１】超電導磁気シールド８は、高純度のアルミ
ニウムより矩形板状に形成され、かつ、接続部３の側部
に変動磁界の磁力線の方向を遮るように、変動磁界の磁
力線の方向と垂直に設置されている。この実施例によれ
ば、高純度のアルミニウムは１０-11Ωｍという低い電
気抵抗を示すので、磁界が変化したときはアルミニウム
に渦電流が流れ、接続部３の磁界変化率を緩和し、接続
部３の変動磁界による発熱を抑制する効果がある。ま
た、高純度のアルミニウムは入手し易く、しかも、加工
し易いので、製作がより単純化される等の効果もある。
なお、超電導磁気シールド８として、電気銅または無酸
素銅より形成することもできる。The superconducting magnetic shield 8 is formed of high-purity aluminum in a rectangular plate shape, and is perpendicular to the direction of the magnetic field lines of the fluctuating magnetic field so as to block the direction of the magnetic field lines of the fluctuating magnetic field on the side portion of the connecting portion 3. is set up. According to this embodiment, since high-purity aluminum has a low electric resistance of 10 −11 Ωm, an eddy current flows in the aluminum when the magnetic field changes, and the rate of change of the magnetic field of the connecting portion 3 is relaxed. 3 has an effect of suppressing heat generation due to the fluctuating magnetic field. Further, since high-purity aluminum is easily available and easily processed, it has an effect of simplifying the production.
The superconducting magnetic shield 8 may be made of electrolytic copper or oxygen-free copper.
【００２２】実施例４．図６は、この発明に係る請求項
第２項記載の超電導導体の接続部構造の一実施例を示す
接続部の斜視図である。図において、符号９は、超電導
線２の接続部３に外部から印加される変動磁界を遮蔽又
は緩和する、端子が短絡した超電導コイルである。超電
導コイル９は接続部３の中心軸を巻線軸とし、かつ、接
続部３の周囲を接続部３の全長にわたって覆うように設
置されている。Example 4. FIG. 6 is a perspective view of a connecting portion showing an embodiment of the connecting portion structure of the superconducting conductor according to the second aspect of the present invention. In the figure, reference numeral 9 is a superconducting coil whose terminals are short-circuited, which shields or alleviates a fluctuating magnetic field applied to the connecting portion 3 of the superconducting wire 2 from the outside. The superconducting coil 9 is installed such that the central axis of the connecting portion 3 is the winding axis and the periphery of the connecting portion 3 is covered over the entire length of the connecting portion 3.
【００２３】このような構成において、外部から加わる
変動磁界が超電導線２と平行に接続部３に加わると、超
電導コイル９に電流が流れるので、係る変動磁界は遮蔽
又は緩和される。この実施例によれば、数Ｔという大き
な超電導線方向の変動磁界を遮蔽又は緩和できる効果が
ある。In such a structure, when a fluctuating magnetic field applied from the outside is applied to the connecting portion 3 in parallel with the superconducting wire 2, a current flows through the superconducting coil 9, so that the fluctuating magnetic field is shielded or relaxed. According to this embodiment, there is an effect that a large fluctuating magnetic field in the superconducting wire direction of several T can be shielded or mitigated.
【００２４】実施例５．図７は、この発明に係る請求項
第２項記載の超電導導体の接続部構造の一実施例を示す
接続部の斜視図である。図において、符号１０は、超電
導線２の接続部３に外部から印加される変動磁界を遮蔽
又は緩和する、端子が短絡した超電導コイルである。Example 5. FIG. 7 is a perspective view of a connecting portion showing an embodiment of the connecting portion structure of the superconducting conductor according to the second aspect of the present invention. In the figure, reference numeral 10 is a superconducting coil whose terminals are short-circuited, which shields or alleviates a fluctuating magnetic field applied to the connecting portion 3 of the superconducting wire 2 from the outside.
【００２５】超電導コイル１０は接続部３の中心軸と直
角な軸を巻線軸とし、かつ、横軸および縦軸が接続部３
の横軸および縦軸とほぼ一致する大きさに構成されてい
る。また、超電導コイル１０は接続部３の側部に接続部
３と平行に設置されている。このような構成において、
外部からの変動磁界が超電導線２と直角に接続部３に加
わると、超電導コイル１０に電流が流れるので、係る変
動磁界は遮蔽又は緩和される。In the superconducting coil 10, the axis perpendicular to the central axis of the connecting portion 3 is the winding axis, and the horizontal and vertical axes are the connecting portion 3.
The size is configured to substantially match the horizontal and vertical axes of. The superconducting coil 10 is installed on the side of the connecting portion 3 in parallel with the connecting portion 3. In such a configuration,
When a fluctuating magnetic field from the outside is applied to the connecting portion 3 at a right angle to the superconducting wire 2, a current flows through the superconducting coil 10, so that the fluctuating magnetic field is shielded or relaxed.
【００２６】この実施例によれば、数Ｔという大きな超
電導線方向の変動磁界を遮蔽又は緩和できるとともに、
超電導コイル１０は接続部３の製作後に取り付けること
ができるので、製作工程を簡略化できる等の効果があ
る。According to this embodiment, a large fluctuating magnetic field in the direction of the superconducting wire of several T can be shielded or alleviated, and
Since the superconducting coil 10 can be attached after the connection part 3 is manufactured, the manufacturing process can be simplified.
【００２７】[0027]
【発明の効果】以上説明したように、この発明に係る請
求項第１項記載の発明によれば、超電導導体の接続部の
外部に、外部からの変動磁界を遮蔽する超電導磁気シー
ルドが設けられているので、変動磁界を遮蔽又はするこ
とができる。したがって、接続部の発熱および発熱に伴
う温度上昇が抑制され、安定な超電導導体の接続部構造
が得られる効果がある。As described above, according to the first aspect of the present invention, the superconducting magnetic shield for shielding the fluctuating magnetic field from the outside is provided outside the connecting portion of the superconducting conductor. Therefore, the fluctuating magnetic field can be shielded or shielded. Therefore, there is an effect that the heat generation of the connection part and the temperature rise due to the heat generation are suppressed, and a stable connection part structure of the superconducting conductor can be obtained.
【００２８】また、この発明に係る請求項第２項記載の
発明によれば、接続部の外部に、超電導線を巻回し、か
つ、両端を短絡した超電導コイルが設けられているの
で、変動磁界を遮蔽又は緩和することができる。したが
って、接続部の発熱および発熱に伴う温度上昇が抑制さ
れ、安定な超電導導体の接続部構造が得られる効果があ
る。また、数Ｔの大きな変動磁界をも遮蔽又は緩和する
効果がある。According to the second aspect of the present invention, since the superconducting coil having the superconducting wire wound and the both ends short-circuited is provided outside the connecting portion, the variable magnetic field is increased. Can be shielded or mitigated. Therefore, there is an effect that the heat generation of the connection part and the temperature rise due to the heat generation are suppressed, and a stable connection part structure of the superconducting conductor can be obtained. It also has the effect of shielding or mitigating a fluctuating magnetic field having a large number T.
【図１】この発明に係る請求項第１項記載の超電導導体
の接続部構造の第１実施例の縦断面図である。FIG. 1 is a longitudinal sectional view of a first embodiment of a connecting portion structure of a superconducting conductor according to claim 1 of the present invention.
【図２】図１に示す実施例の接続部の斜視図である。FIG. 2 is a perspective view of a connection portion of the embodiment shown in FIG.
【図３】この発明に係る請求項第１項記載の超電導導体
の接続部構造の第２実施例の斜視図である。FIG. 3 is a perspective view of a second embodiment of the superconducting conductor connecting portion structure according to the first aspect of the present invention.
【図４】図３に示す実施例の接続部の一部拡大斜視図で
ある。FIG. 4 is a partially enlarged perspective view of a connection portion of the embodiment shown in FIG.
【図５】この発明に係る請求項第１項記載の超電導導体
の接続部構造の第３実施例の斜視図である。FIG. 5 is a perspective view of a third embodiment of the superconducting conductor connecting portion structure according to the first aspect of the present invention.
【図６】この発明に係る請求項第２項記載の超電導導体
の接続部構造の第１実施例の斜視図である。FIG. 6 is a perspective view of a first embodiment of a superconducting conductor connecting portion structure according to a second aspect of the present invention.
【図７】この発明に係る請求項第２項記載の超電導導体
の接続部構造の第２実施例の斜視図である。FIG. 7 is a perspective view of a second embodiment of the superconducting conductor connecting portion structure according to the second aspect of the present invention.
【図８】従来の超電導導体の接続部の一例の斜視図であ
る。FIG. 8 is a perspective view of an example of a connection portion of a conventional superconducting conductor.
【図９】図８の超電導導体の接続部の縦断面図である。9 is a vertical cross-sectional view of a connecting portion of the superconducting conductor of FIG.
２ 超電導線 ３ 接続部 ６ 超電導磁気シールド ７ 超電導磁気シールド ８ 超電導磁気シールド ９ 超電導コイル １０ 超電導コイル 2 superconducting wire 3 connection part 6 superconducting magnetic shield 7 superconducting magnetic shield 8 superconducting magnetic shield 9 superconducting coil 10 superconducting coil
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年９月１６日[Submission date] September 16, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項１[Name of item to be corrected] Claim 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１０】[0010]
【課題を解決するための手段】この発明に係る請求項第
１項記載の超電導導体の接続部構造は、超電導導体の接
続部の外部に磁気シールドを設けることにより構成され
ている。Connecting portion structure SUMMARY OF THE INVENTION The superconducting conductor as in claim 1 wherein according to the invention is constituted by the outside of the connection portion of the superconducting conductors provided magnetic shield.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１２】[0012]
【作用】この発明に係る請求項第１項記載の超電導導体
の接続部構造においては、接続部の外側に設けられた磁
気シールドによって接続部に作用する変動磁界が遮蔽又
は緩和される。[Action] In the connection part structure of claim superconductor as set forth in claim 1, wherein according to the present invention, fluctuation magnetic field shielding or alleviate acting on the connecting portion by magnetic <br/> vapor shield which is provided outside the connecting portion To be done.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１５[Name of item to be corrected] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１５】超電導磁気シールド６は、接続部３の周囲
に、接続部３を完全に覆うように筒形状に設置されてい
る。また、超電導磁気シールド６は、例えばＮｂＴｉ
（ニオブトチタンの合金）と銅の薄膜との積層体または
酸化物高温超電導体（例えば、バリウムとランタンと銅
と酸素との化合物）等から形成されている。The superconducting magnetic shield 6 is installed in a tubular shape around the connecting portion 3 so as to completely cover the connecting portion 3. Further, the superconducting magnetic shield 6 is made of, for example, NbTi.
It is formed of a laminated body of (a niobium titanium alloy) and a copper thin film, or an oxide high temperature superconductor (for example, a compound of barium, lanthanum, copper and oxygen).
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１６[Correction target item name] 0016
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１６】このように構成された超電導線２の接続部
３においては、定常磁場における冷却状態では、電気抵
抗損失のきわめて少ない状態で電流を流すことができ
る。また、外部から印加される変動磁界がある場合、接
続部外周に設置された超電導磁気シールドによって変動
磁界が遮蔽又は緩和されるので、渦電流および結合電流
による熱が発生せず、たとえ、発生したとしてもきわめ
て小さいので、発生熱によってコイル全体の安定性が損
なわれるという問題は生じない。In the connecting portion 3 of the superconducting wire 2 constructed as described above, in the cooling state in the stationary magnetic field, the electric current can flow in the state where the electric resistance loss is extremely small. In addition, when there is a fluctuating magnetic field applied from the outside, the fluctuating magnetic field is shielded or relaxed by the superconducting magnetic shield installed on the outer periphery of the connection part, so heat due to eddy current and coupling current does not occur, However, since it is extremely small, the problem that the stability of the entire coil is impaired by the generated heat does not occur.
【手続補正６】[Procedure correction 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２０[Correction target item name] 0020
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００２０】実施例３．図５は、この発明に係る請求項
第１項記載の超電導導体の接続部構造の第３実施例を示
す接続部の斜視図である。図において、符号８は超電導
線２の接続部３に外部から印加される変動磁界を遮蔽又
は緩和する磁気シールドである。Example 3. FIG. 5 is a perspective view of a connecting portion showing a third embodiment of the connecting portion structure of the superconducting conductor according to the first aspect of the present invention. In the figure, reference numeral 8 is a magnetic shield you shield or alleviate fluctuation magnetic field applied externally to the connection portion 3 of the superconducting wire 2.
【手続補正７】[Procedure Amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２１[Correction target item name] 0021
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００２１】磁気シールド８は、高純度のアルミニウム
より矩形板状に形成され、かつ、接続部３の側部に変動
磁界の磁力線の方向を遮るように、変動磁界の磁力線の
方向と垂直に設置されている。この実施例によれば、高
純度のアルミニウムは１０-11Ωｍという低い電気抵抗
を示すので、磁界が変化したときはアルミニウムに渦電
流が流れ、接続部３の磁界変化率を緩和し、接続部３の
変動磁界による発熱を抑制する効果がある。また、高純
度のアルミニウムは入手し易く、しかも、加工し易いの
で、製作がより単純化される等の効果もある。なお、磁
気シールド８として、電気銅または無酸素銅より形成す
ることもできる。The magnetic shield 8 is formed in a rectangular plate shape than high purity aluminum, and, so as to block the direction of magnetic field lines of the fluctuating magnetic field on the side of the connecting portion 3, and the vertical magnetic field lines of the variable magnetic field is set up. According to this embodiment, since high-purity aluminum has a low electric resistance of 10 −11 Ωm, an eddy current flows in the aluminum when the magnetic field changes, and the rate of change of the magnetic field of the connecting portion 3 is relaxed. 3 has an effect of suppressing heat generation due to the fluctuating magnetic field. Further, since high-purity aluminum is easily available and easily processed, it has an effect of simplifying the production. The magnetic shield 8 may be made of electrolytic copper or oxygen free copper.
【手続補正８】[Procedure Amendment 8]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２７[Name of item to be corrected] 0027
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００２７】[0027]
【発明の効果】以上説明したように、この発明に係る請
求項第１項記載の発明によれば、超電導導体の接続部の
外部に、外部からの変動磁界を遮蔽する磁気シールドが
設けられているので、変動磁界を遮蔽又はすることがで
きる。したがって、接続部の発熱および発熱に伴う温度
上昇が抑制され、安定な超電導導体の接続部構造が得ら
れる効果がある。As described in the foregoing, according to the present invention set forth in claim 1, wherein according to the present invention, the external connection portion of the superconductor, provided a magnetic shield you shield the fluctuating magnetic field from the outside Therefore, the fluctuating magnetic field can be shielded or shielded. Therefore, there is an effect that the heat generation of the connection part and the temperature rise due to the heat generation are suppressed, and a stable connection part structure of the superconducting conductor can be obtained.
【手続補正９】[Procedure Amendment 9]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】符号の説明[Correction target item name] Explanation of code
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【符号の説明】 ２ 超電導線 ３ 接続部 ６ 超電導磁気シールド ７ 超電導磁気シールド ８ 磁気シールド ９ 超電導コイル １０ 超電導コイル[EXPLANATION OF SYMBOLS] 2 superconducting wire 3 connecting portion 6 superconducting magnetic shield 7 superconducting magnetic shield 8 magnetic shield 9 superconducting coil 10 superconducting coil
【手続補正１０】[Procedure Amendment 10]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１[Name of item to be corrected] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
【手続補正１１】[Procedure Amendment 11]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図５[Name of item to be corrected] Figure 5
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図５】 [Figure 5]
Claims (2)
導体の接続部構造において、前記接続部の外部に超電導
磁気シールドを設けたことを特徴とする超電導導体の接
続部構造。1. A superconducting conductor connecting portion structure obtained by soldering a superconducting conductor, wherein a superconducting magnetic shield is provided outside the connecting portion.
導体の接続部構造において、前記接続部の外部に、超電
導線を巻回し、かつ、両端を短絡した超電導コイルを設
けたことを特徴とする超電導導体の接続部構造。2. A superconducting conductor connecting portion structure obtained by soldering a superconducting conductor, wherein a superconducting coil is provided outside the connecting portion, and a superconducting coil having both ends short-circuited is provided. Connection structure of superconducting conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4206502A JPH0653025A (en) | 1992-08-03 | 1992-08-03 | Joint structure of superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4206502A JPH0653025A (en) | 1992-08-03 | 1992-08-03 | Joint structure of superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0653025A true JPH0653025A (en) | 1994-02-25 |
Family
ID=16524433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4206502A Pending JPH0653025A (en) | 1992-08-03 | 1992-08-03 | Joint structure of superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653025A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005310395A (en) * | 2004-04-16 | 2005-11-04 | Mitsubishi Electric Corp | Superconducting conductor connection device |
| JP2007081244A (en) * | 2005-09-15 | 2007-03-29 | Institute Of Physical & Chemical Research | Nb3Al superconducting coil connection method |
| JP2012234939A (en) * | 2011-04-28 | 2012-11-29 | High Energy Accelerator Research Organization | Magnetic shielding material for superconducting magnet |
-
1992
- 1992-08-03 JP JP4206502A patent/JPH0653025A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005310395A (en) * | 2004-04-16 | 2005-11-04 | Mitsubishi Electric Corp | Superconducting conductor connection device |
| JP2007081244A (en) * | 2005-09-15 | 2007-03-29 | Institute Of Physical & Chemical Research | Nb3Al superconducting coil connection method |
| JP2012234939A (en) * | 2011-04-28 | 2012-11-29 | High Energy Accelerator Research Organization | Magnetic shielding material for superconducting magnet |
| US9103005B2 (en) | 2011-04-28 | 2015-08-11 | Inter-University Research Institute Corporation High Energy Accelerator Research Organization | Magnetic shielding material for superconducting magnet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6039705A (en) | Aluminum stabilized superconductive conductor | |
| US3619479A (en) | Electrical conductor of electrically normal conducting metal and superconducting material | |
| CN121925568A (en) | Connector for magnetic resonance examination apparatus | |
| US11769615B2 (en) | Superconducting joints | |
| JPS63236218A (en) | Superconductive wire | |
| JP3127705B2 (en) | Current lead using oxide superconductor | |
| JPH06104026A (en) | Superconducting conductor connection structure | |
| JP2004087265A (en) | Terminal structure of multilayer superconducting conductor and method of manufacturing the same | |
| JPH01298706A (en) | Manufacture of superconducting coil | |
| JPH031469A (en) | Connecting method for superconductive wire and compound superconductive wire | |
| JPH0748420B2 (en) | Superconducting coil device | |
| JP2533119B2 (en) | Superconducting device for short circuit suppression | |
| JPH06333738A (en) | Current lead using oxide superconductor | |
| JPH0355781A (en) | Connection of superconductive wire | |
| JPH1050447A (en) | Method for connecting oxide superconducting current lead to electrode, and structure of connection part | |
| JP2012235008A (en) | Superconductive lead and superconducting magnet device | |
| JPH11297524A (en) | Current leads for superconducting devices | |
| Steeves et al. | Lap joint resistance of Nb 3 Sn cable terminations for the ICCS-HFTF 12 tesla coil program | |
| JPH0547549A (en) | How to fix the electromagnet winding connection | |
| JPS60254710A (en) | Compound system superconductive magnet | |
| EP4113548A1 (en) | Superconducting magnet, superconducting wire, and method for producing superconducting magnet | |
| JPH03217009A (en) | Hybrid superconducting coil | |
| JP2879850B2 (en) | Current limiting element | |
| JPH0869827A (en) | Terminal of AC superconducting equipment | |
| JPH0515055A (en) | Fault current limiter |