JP3142934B2 - Superconducting current lead connection structure - Google Patents
Superconducting current lead connection structureInfo
- Publication number
- JP3142934B2 JP3142934B2 JP745692A JP745692A JP3142934B2 JP 3142934 B2 JP3142934 B2 JP 3142934B2 JP 745692 A JP745692 A JP 745692A JP 745692 A JP745692 A JP 745692A JP 3142934 B2 JP3142934 B2 JP 3142934B2
- Authority
- JP
- Japan
- Prior art keywords
- current lead
- superconducting current
- connection structure
- superconducting
- lead member
- 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.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は超電導電流リード部材同
士もしくは超電導電流リード部材と常電導導体部材との
電気的な接続構造体に係り、特に任意の構造化や特性の
均一化された超電導電流リードの接続構造体、あるいは
熱的衝撃や機械的外力による破損の保護などが図られた
超電導電流リードの接続構造体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connection structure between superconducting current lead members or between a superconducting current lead member and a normal conducting member, and more particularly to a superconducting current having an arbitrary structure and uniform characteristics. The present invention relates to a lead connection structure or a superconducting current lead connection structure which is protected from damage due to thermal shock or mechanical external force.
【０００２】[0002]
【従来の技術】酸化物超電導体からなる超電導電流リー
ドは、熱伝導率が低いという特性を備えている。この特
性を利用して、超電導電流リード部材の一方を極低温中
の超電導線に接続し、他方を常温中にある常電導導体
（たとえば銅製の電流リード）を接続して、常温中にあ
る常電導導体から極低温中への熱進入を防ぎながら所要
の電流を流す手段が考えられる。また、この超電導電流
リード部材としての利用においては、線径が細ければ細
い程、常電導導体から極低温中への熱進入も低減し得
る。したがって、超電導電流リード部材は、できるだけ
細くするのが理想的であり、図９に要部を断面的に示す
ごとく、超電導電流リード部材と常電導導体部材の接続
構造体は、酸化物超電導体からなる超電導電流リード部
材１の被接続端子部1aを膨大に（拡張）形成する一方、
常電導導体である銅製電流リード部材２の被接続端子部
2aと同一形状として、両被接続端子部1a，2aの被接合面
を対接させ電気的に接続している。そして、前記超電導
電流リード部材１の被接続端子部1a被接合面と銅製電流
リード２の被接続端子部2aの被接合面との接続について
は、被接合面間に導電性の接着剤を介在させて接続する
か、あるいは図 に要部構成を断面的に示すごとく、超
電導電流リード部材１および銅製電流リード部材２の各
被接合面を対接させて、これらをクランプ３によって堅
固に締め付け、機械的に接続する手段などがある。2. Description of the Related Art A superconducting current lead made of an oxide superconductor has a characteristic of low thermal conductivity. Utilizing this characteristic, one of the superconducting current lead members is connected to a superconducting wire at a very low temperature, and the other is connected to a normal conductor (for example, a current lead made of copper) at a normal temperature. Means for flowing a required current while preventing heat from entering the cryogenic temperature from the conductive conductor can be considered. In the use as a superconducting current lead member, the smaller the wire diameter is, the more the heat intrusion from the normal conductor into the cryogenic temperature can be reduced. Therefore, it is ideal that the superconducting current lead member is as thin as possible. As shown in FIG. While the connected terminal portion 1a of the superconducting current lead member 1 is enormously (extended),
Connected terminal part of copper current lead member 2 which is a normal conducting conductor
2a, the surfaces to be connected of both connected terminal portions 1a and 2a are brought into contact with each other and electrically connected. The connection between the connected terminal portion 1a of the superconducting current lead member 1 and the connected surface of the connected terminal portion 2a of the copper current lead 2 is performed by interposing a conductive adhesive between the connected surfaces. As shown in the figure, the surfaces of the superconducting current lead member 1 and the copper current lead member 2 are brought into contact with each other. There are mechanical connection means.
【０００３】また、前記酸化物超電導体は、一般的に機
械的な強度が劣り、僅かな機械的衝撃でも破損し易いと
いう脆さがあるので、比較的線径が小さくて長尺なもの
などを製造ないし加工することが非常に困難である。し
たがって、丸棒形で比較的短尺なものを得て、これらを
接続して所要の超電導電流リード部材１を構成する場合
がしばしばある。Also, the oxide superconductor generally has poor mechanical strength and is fragile in that it is easily broken by a slight mechanical impact. Is very difficult to manufacture or process. Therefore, it is often the case that a relatively short rod-shaped one is obtained and connected to form a required superconducting current lead member 1.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記図
示した構成の超電導電流リード部材１の場合、すなわち
被接続端子部1aを選択的に拡張形成（膨大化）して、そ
の被接続端面を銅製電流リード２の被接続端子部2a端面
とほぼ同形状にし、両被接続端面を対接させ接続するこ
とにより、接触面積を大きくし接触抵抗の低減を図った
構成では次のような問題がある。つまり、接触面積を大
きくし接触抵抗の低減を図るため、超電導電流リード部
材１の被接続端子部1aを急激に拡張形成（膨大化）して
おり、この被接続端子部1aと比較的線径が小さい部分1b
との連接部４が、熱的衝撃，銅製電流リード部材２との
接続時，あるいは組み立て時に発生する機械的外力によ
って破断など起こし易いという問題がある。However, in the case of the superconducting current lead member 1 having the above-described configuration, the connected terminal portion 1a is selectively expanded (expanded), and the connected end face is made of copper current. The configuration having the same shape as the end face of the connected terminal portion 2a of the lead 2 and connecting and connecting the two connected end faces to increase the contact area and reduce the contact resistance has the following problems. That is, in order to increase the contact area and reduce the contact resistance, the connected terminal portion 1a of the superconducting current lead member 1 is rapidly expanded (enlarged), and the wire diameter of the connected terminal portion 1a is relatively large. Is small part 1b
Is easily broken due to a thermal shock, a mechanical external force generated at the time of connection with the copper current lead member 2 or at the time of assembly.
【０００５】また、丸棒形の短尺な超電導電流リード部
材１を、複数個直列に接続一体化して構成する超電導電
流リードの場合は、前記の各短尺な超電導電流リード部
材１が必ずしも特性の均一性を保持しないため、設計上
も多くの制約を伴うことになり、構成の繁雑さと相俟っ
て実用的に問題がある。In the case of a superconducting current lead formed by connecting and integrating a plurality of short superconducting current lead members 1 in a round bar shape, each of the short superconducting current lead members 1 is not necessarily uniform in characteristics. However, there is a lot of restrictions on the design, and there is a practical problem with the complexity of the configuration.
【０００６】さらに、前記いずれの場合も、超電導電流
リードの構成がいわゆる直線的で、使用態様も一定の範
囲に制限されている。しかし、この種の超電導電流リー
ドを装着する極低温装置のコンパクト化などの点から、
超電導電流リードについても任意な形状，任意な使用態
様の選択・設定も要求される場合も往々生じているが、
前記従来の超電導電流リードの構成では、このような要
望に対応し得ない。Further, in any of the above cases, the configuration of the superconducting current lead is so-called linear, and the mode of use is limited to a certain range. However, from the viewpoint of downsizing of the cryogenic device equipped with this type of superconducting current lead,
For the superconducting current lead, selection and setting of an arbitrary shape and an arbitrary usage mode are often required.
The configuration of the conventional superconducting current lead cannot meet such a demand.
【０００７】ここで、前記熱的衝撃について説明する
と、超電導電流リード１は、常温中では超電導状態とは
ならず、極低温中でのみ超電導状態となる。したがっ
て、ここでいう熱的衝撃とは、常温から極低温への急激
な温度変化における超電導電流リード１の膨張、収縮に
よる熱的疲労のことである。Here, the thermal shock will be described. The superconducting current lead 1 does not enter a superconducting state at room temperature, but enters a superconducting state only at an extremely low temperature. Therefore, the thermal shock referred to here is thermal fatigue due to expansion and contraction of the superconducting current lead 1 in a rapid temperature change from room temperature to extremely low temperature.
【０００８】本発明は上記問題点を解決するためのもの
であり、任意の構造（形状）の選択が可能で、かつ一様
な特性を呈する超電導電流リード、もしくは超電導電流
リードの熱的衝撃や機械的外力による破損の防止、超電
導電流リードと常電導導体との接続の容易性を確保する
ことが可能な超電導電流リードの接続構造体の提供を目
的とする。The present invention has been made to solve the above-mentioned problems, and a superconducting current lead having an arbitrary structure (shape) that can be selected and exhibiting uniform characteristics, a thermal shock of a superconducting current lead, and the like. It is an object of the present invention to provide a connection structure for a superconducting current lead capable of preventing breakage due to a mechanical external force and ensuring easy connection between the superconducting current lead and a normal conductor.
【０００９】[0009]
【課題を解決するための手段】本発明に係る超電導電流
リードの接続構造体は、超電導電流リード部材同士もし
くは超電導電流リード部材と常電導導体部材との電気的
な接続構造体において、前記各被接合部材は被接合面が
互いに密着的な対接可能な加工面での接合により電気的
に接続されていることを特徴とし（第１の接続構造
体）、また、酸化物超電導体から成る超電導電流リード
部材と常電導導体部材とがほぼ同形の被接合面で対接し
て電気的に接続する接続構造体において、前記超電導電
流リード部材の径が被接合面方向へ徐々に膨大化されて
構成されていることを特徴とし（第２の接続構造体）、
さらに、酸化物超電導体からなる超電導電流リード部材
と常電導導体部材との電気的な接続構造体において、前
記両被接合部材は被接合面が互いに嵌合・密着して対接
可能な錐形の凹凸面を備え、前記錐形の凹凸面の嵌合・
密着により電気的に接続していることを特徴として（第
３の接続構造体）いる。According to the present invention, there is provided a connection structure for a superconducting current lead according to the present invention, wherein the superconducting current leads are connected to each other or between the superconducting current lead and the normal conductor. The joining member is characterized in that the surfaces to be joined are electrically connected to each other by joining at a processing surface which can be brought into close contact with each other (first connection structure), and a superconducting member made of an oxide superconductor In a connection structure in which a current lead member and a normal conductor member contact and electrically connect to each other at substantially the same surface to be joined, the diameter of the superconducting current lead member is gradually enlarged toward the surface to be joined. (A second connection structure),
Further, in the electrical connection structure between the superconducting current lead member made of an oxide superconductor and the normal conductor member, the two joined members are conical in shape so that the surfaces to be joined can be brought into close contact with each other. With a concavo-convex surface.
It is characterized by being electrically connected by close contact (third connection structure).
【００１０】[0010]
【作用】第１の接続構造体の場合は、超電導電流リード
がいわゆるユニット化されているため、これらユニット
化されている超電導電流リード部材の選択・組み合わせ
により任意の形状ないし構造で、かつ均一な特性の長尺
形超電導電流リードとして機能する。In the case of the first connection structure, since the superconducting current leads are so-called unitized, the shape and structure of the superconducting current leads can be made uniform by selecting and combining these unitized superconducting current leads. Functions as a long superconducting current lead with special characteristics.
【００１１】また、第２および第３の接続構造体の場合
は、熱的衝撃や機械的外力に対して耐久性を有するとと
もに、超電導電流リード部材と常電導導体との接続も容
易に達成し得る。Further, the second and third connection structures have durability against thermal shock and mechanical external force, and can easily achieve connection between the superconducting current lead member and the normal conductor. obtain.
【００１２】[0012]
【実施例】以下図１〜図８を参照して本発明の実施例を
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１３】実施例１ 本実施例はユニット化された超電導電流リード部材の選
択・組み合わせにより構成された超電導電流リードの接
続構造体の場合である。図１は前記ユニット化さた超電
導電流リード部材５の一構造例を断面的に示したもの
で、超電導電流リード部材５は、拡張形成（膨大化）し
た被接続端子部5aおよびこの被接続端子部5a間を連接す
る線径の小さ部分5bとで構成されている。そして、前記
被接続端子部5aの端面は、互いに接続される他の超電導
電流リード部材５の被接続端子部5aの端面、もしくは常
電導電流リード部材の被接続端子部の端面と、対接可能
な形（状態）に任意の角度および方向にに加工された構
成を成している。つまり、前記超電導電流リード部材５
の被接続端子部5aの端面は、相互に接続して構成する超
電導電流リードの接続構造体の形態に対応して、接続さ
れる他の超電導電流リード部材５などの被接続端子部5a
の端面の傾斜方向や角度に応じて適宜面加工されてい
る。Embodiment 1 This embodiment relates to a superconducting current lead connecting structure constituted by selecting and combining unitized superconducting current lead members. FIG. 1 is a cross-sectional view showing an example of the structure of the unitized superconducting current lead member 5. The superconducting current lead member 5 includes a connected terminal portion 5 a that has been expanded (expanded) and a connected terminal portion 5 a. It is composed of a small wire diameter portion 5b connecting the portions 5a. The end surface of the connected terminal portion 5a can be connected to the end surface of the connected terminal portion 5a of another superconducting conductive lead member 5 or the connected terminal portion of the normal conducting flow lead member. It is configured to be processed into an arbitrary shape and state at an arbitrary angle and direction. That is, the superconducting current lead member 5
The end face of the connected terminal portion 5a is connected to the connected terminal portion 5a of another superconducting current lead member 5 or the like to be connected, corresponding to the form of the connection structure of the superconducting current lead formed by connecting to each other.
Are appropriately processed according to the inclination direction and angle of the end face.
【００１４】図２および図３は、前記のように構成され
た超電導電流リード部材５複数個を、相互にその被接続
端子部5a端面間に、たとえば銀粉末を含有する導電性接
着剤層を介して、密着的に対接させて構成した超電導電
流リードの接続構造体のそれぞれ異なる構造例を斜視的
に示したものである。すなわち、図２は超電導電流リー
ド部材５などの被接続端子部5aの端面の傾斜方向を変え
て、湾曲的に構成した超電導電流リード接続構造体であ
り、また図３は分岐形もしくは合流形に構成した超電導
電流リード接続構造体である。FIGS. 2 and 3 show a plurality of superconducting current lead members 5 constructed as described above, and a conductive adhesive layer containing, for example, silver powder, between the end surfaces of connected terminal portions 5a. FIG. 3 is a perspective view showing different structural examples of a connection structure of a superconducting current lead formed in close contact with each other. That is, FIG. 2 shows a superconducting current lead connection structure which is curved by changing the inclination direction of the end face of the connected terminal portion 5a such as the superconducting current lead member 5, and FIG. It is a superconducting current lead connection structure constituted.
【００１５】上記構成例では、超電導電流リード部材５
相互の被接続端子部5a端面間に、導電性接着剤層を介在
させて一体化したが、図４にその断面構造を示すごと
く、超電導電流リード部材５相互の被接続端子部5a端面
を、予め銀蒸着もしくは銀箔処理しておくとともに、対
接する被接続端子部5a同士を接続する孔を穿設してお
き、金属棒もしくは酸化物超電導体製のボルトナット６
で締め付け一体化して接続構造体を構成してもよい。In the above configuration example, the superconductive current lead member 5
Although the conductive adhesive layer was interposed between the end faces of the connected terminal parts 5a, they were integrated. However, as shown in the cross-sectional structure of FIG. A hole for connecting the connected terminal portions 5a to be connected with each other is formed in advance by performing silver deposition or silver foil processing, and a bolt or nut 6 made of a metal rod or an oxide superconductor is formed.
To form a connection structure.
【００１６】さらに、前記の構成例では、超電導電流リ
ード部材５の被接続端子部5aなどを膨大化（拡張形成）
したが、たとえば図５に断面的に示すように、超電導電
流リード部材５に膨大化（拡張形成）部を設けずに、被
接続端子面同士を接続して所要の超電導電流リード接続
構造体を構成してもよい。Further, in the above configuration example, the connected terminal portions 5a and the like of the superconducting current lead member 5 are enormous (expanded formation).
However, for example, as shown in a cross-sectional view in FIG. 5, the superconducting current lead member 5 is not provided with an enormous (expanded formation) portion, and the connected terminal surfaces are connected to form a required superconducting current lead connecting structure. You may comprise.
【００１７】実施例２ 本実施例は、熱的衝撃および機械的外力による破損など
を保護可能に構成された超電導電流リードの場合であ
る。図６は熱的衝撃や機械的外力による破損からの保護
が可能な、超電導電流リードの接続構造体の構成例の要
部を断面的に示したもので、５′は超電導電流リード部
材、７はたとえば銅から成る常電導電流部材である。そ
して、この構成例においては、酸化物超電導体から成る
超電導電流リード部材５′と常電導電流部材７とは、ほ
ぼ同形の被接合面で対接して電気的に接続する接続構造
体を構成しており、かつ前記超電導電流リード部材５′
は被接合面方向へ徐々に膨大化した形状を成している。
つまり、前記超電導電流リード部材５′の被接続端子部
5a′は、細径部5b′から徐々に拡張形成（膨大化）され
ており、前記被接続端子部5a′と細径部5b′との連接部
８が熱的および機械的に補強された構成となるため、熱
的衝撃および機械的外力に対して大幅に保護された超電
導電流リードの接続構造体として機能し得ることにな
る。Embodiment 2 This embodiment is directed to a superconducting current lead which can be protected from damage due to thermal shock and mechanical external force. FIG. 6 is a cross-sectional view showing a main portion of a configuration example of a connection structure of a superconducting current lead capable of protecting against damage due to a thermal shock or a mechanical external force. Is a normal conducting current member made of copper, for example. In this configuration example, the superconducting current lead member 5 ′ made of an oxide superconductor and the normal conducting current member 7 constitute a connection structure that contacts and is electrically connected to each other on substantially the same surface to be joined. And the superconducting current lead member 5 '
Has a gradually enlarged shape in the direction of the surface to be joined.
That is, the connected terminal portion of the superconducting current lead member 5 '
5a 'is gradually expanded (expanded) from the small diameter portion 5b', and the connecting portion 8 between the connected terminal portion 5a 'and the small diameter portion 5b' is thermally and mechanically reinforced. Due to the configuration, it can function as a connection structure for a superconducting current lead which is largely protected against thermal shock and mechanical external force.
【００１８】なお、超電導電流リード部材５′および常
電導電流部材７の接続部９の断面積は、超電導電流リー
ド部材５′の電流密度が常電導電流部材７の電流密度よ
りはるかに大きいことから、超電導電流リード部材５′
に流す電流と常電導電流部材７の材質によって決められ
る。たとえば、超電導電流リード部材５′に流す電流を
1000[A] としたとき、常電導電流部材７が銅とすると銅
の電流密度が約12.7[A／mm2 ］であるため、超電導電流
リード部材５′および常電導電流部材７の接続部９の断
面積は約78.5[ mm2 ］となる。ただし、銅の電流密度1
2.7[A／mm2 ］は、温度を液体窒素レベルに置き換えて
算出した値である。The cross-sectional area of the connecting portion 9 between the superconducting current lead member 5 'and the normal conducting current member 7 is because the current density of the superconducting current lead member 5' is much larger than the current density of the normal conducting current member 7. , Superconducting current lead member 5 '
And the material of the normal current flow member 7. For example, the current flowing through the superconducting current lead member 5 'is
When the normal current flow member 7 is made of copper at 1000 [A], the current density of the copper is about 12.7 [A / mm 2 ], so the connection portion 9 between the superconducting current lead member 5 'and the normal current flowing member 7 is formed. Has a cross-sectional area of about 78.5 [mm 2 ]. However, the current density of copper 1
2.7 [A / mm 2 ] is a value calculated by replacing the temperature with the liquid nitrogen level.
【００１９】図７は他の構成例を断面的に示したもの
で、この構成の場合は超電導電流リード部材５′と常電
導電流部材７との被接続面の位置決めや接続を容易に成
し得る超電導電流リードの接続構造体である。すなわ
ち、この構成においては、超電導電流リード部材５′の
被接続端子部5a′を円錐状の凸面にし、一方、常電導電
流部材７の接続端子部7a′を、前記超電導電流リード部
材５′の円錐状被接続端子部5a′に合致する円錐状の凹
面形状とし、これら円錐状の凹凸面の嵌合による一体化
で、超電導電流リード部材５′を常電導電流部材７に接
続して成る超電導電流リードの接続構造体である。FIG. 7 is a cross-sectional view of another configuration example. In this configuration, positioning and connection of the surface to be connected between the superconductive current lead member 5 'and the normal conductive current member 7 can be easily performed. It is a connection structure of the obtained superconducting current lead. That is, in this configuration, the connected terminal portion 5a 'of the superconducting current lead member 5' has a conical convex surface, while the connecting terminal portion 7a 'of the normal conducting current member 7 is connected to the superconducting current lead member 5'. A superconducting member having a conical concave shape conforming to the conical connected terminal portion 5a 'and connecting the superconducting current lead member 5' to the normal conducting current member 7 by integration by fitting these conical concave and convex surfaces. It is a connection structure of a current lead.
【００２０】なお、この構成例においては、前記円錐状
の凹凸面の嵌合による一体化に当たり、常電導電流部材
７の接続端子部7a′を円錐状の凸面化し、超電導電流リ
ード部材５′の被接続端子部5a′を円錐状の凹面形状と
ししても、前記の場合と同様に接続時の位置決め、接続
を容易に行い得る。また、接続端子部の形状は円錐状に
限定されることなく角錐状などでもよい。In this configuration example, the connection terminal portion 7a 'of the normal conductive current member 7 is formed into a conical convex surface upon integration by fitting of the conical uneven surface, and the superconductive current lead member 5' is formed. Even when the connected terminal portion 5a 'has a conical concave shape, positioning and connection at the time of connection can be easily performed as in the case described above. Further, the shape of the connection terminal portion is not limited to a conical shape, and may be a pyramid shape or the like.
【００２１】図８は、さらに他の異なる構成例を断面的
に示したもので、前記図６に図示した構成と図７に図示
した構成とを備えた超電導電流リードの接続構造体であ
る。すなわち、超電導電流リード部材５′の被接続端子
部5a′を、細径部5b′から徐々に拡張形成（膨大化）し
た構成とし、前記被接続端子部5a′と細径部5b′との連
接部８が熱的および機械的に補強される構成とする一
方、超電導電流リード部材５′の被接続端子部5a′およ
び常電導電流部材７の接続端子部7a′を、嵌合して一体
化が可能な円錐状の凹凸面とし、位置決めなど容易な構
成とすることにより、熱的衝撃および機械的外力に対し
て大幅に保護でき、かつ接続の位置決めも容易に成し得
る超電導電流リードの接続構造体である。FIG. 8 is a cross-sectional view showing still another different configuration example, and is a connection structure of a superconducting current lead having the configuration shown in FIG. 6 and the configuration shown in FIG. That is, the connected terminal portion 5a 'of the superconducting current lead member 5' is formed so as to gradually expand (enlarge) from the small-diameter portion 5b ', and the connection between the connected terminal portion 5a' and the small-diameter portion 5b 'is performed. While the connecting portion 8 is configured to be thermally and mechanically reinforced, the connected terminal portion 5a 'of the superconducting conductive lead member 5' and the connecting terminal portion 7a 'of the normal conducting flow member 7 are fitted and integrated. By adopting a conical concave and convex surface that can be converted to a simple configuration such as positioning, it is possible to significantly protect against thermal shock and mechanical external force and to easily position the connection of the superconducting current lead. It is a connection structure.
【００２２】なお、この構成例の場合、超電導電流リー
ド部材５′と常電導電流部材７との接続は、超電導電流
リード部材５′および常電導電流部材７の被接続端子部
5a′、7a′をそれぞれ膨大化しておき、この膨大化部分
でネジ10により機械的に接続するか、あるいはネジ10に
よる機械的な接続の代わりに、たとえば導電性の接着剤
で超電導電流リード部材５′と常電導電流部材７とを接
続してもよい。In the case of this configuration example, the connection between the superconducting current lead member 5 'and the normal conducting current member 7 is performed by connecting the terminal portions of the superconducting current lead member 5' and the normal conducting current member 7 to each other.
5a 'and 7a' are each enormously enlarged, and the enormous portion is mechanically connected by a screw 10 or, instead of the mechanical connection by the screw 10, for example, a superconducting current lead member using a conductive adhesive. 5 'and the normal current flow member 7 may be connected.
【００２３】[0023]
【発明の効果】以上の説明からも明らかなように、本発
明に係る超電導電流リードの接続構造体は、使用態様に
応じて任意なもしくは複雑な構造ないし形状を採り得る
し、かつ均一な特性を呈する超電導電流リードとして機
能し得る。また、熱的衝撃や機械的外力による破損も解
消し得るし、超電導電流リード部材と常電導電流部材と
の接続部における接触抵抗の低減も図り得る。しかも、
超電導電流リードの接続構造体の構成に当たり、超電導
電流リード部材と常電導電流部材とを高い精度で位置決
めし容易に接続することもできる。As is clear from the above description, the connection structure for a superconducting current lead according to the present invention can have an arbitrary or complicated structure or shape depending on the use mode, and can have uniform characteristics. And can function as a superconducting current lead. Further, breakage due to thermal shock or mechanical external force can be eliminated, and contact resistance at the connection between the superconducting current lead member and the normal conducting current member can be reduced. Moreover,
In the configuration of the connection structure of the superconducting current lead, the superconducting current lead member and the normal conducting current member can be positioned with high precision and easily connected.
【図１】本発明に係る超電導電流リードの接続構造体を
構成する超電導電流リード部材の構造例を示す断面図。FIG. 1 is a sectional view showing a structural example of a superconducting current lead member constituting a connection structure of a superconducting current lead according to the present invention.
【図２】本発明に係る超電導電流リードの接続構造体の
第１の構造例を示す斜視図。FIG. 2 is a perspective view showing a first structural example of a connection structure for a superconducting current lead according to the present invention.
【図３】本発明に係る超電導電流リードの接続構造体の
第２の構造例を示す斜視図。FIG. 3 is a perspective view showing a second structural example of a connection structure for a superconducting current lead according to the present invention.
【図４】本発明に係る超電導電流リードの接続構造体の
第３の構造例を示す断面図。FIG. 4 is a sectional view showing a third structural example of a connection structure for a superconducting current lead according to the present invention.
【図５】本発明に係る超電導電流リードの接続構造体の
第４の構造例を示す断面図。FIG. 5 is a cross-sectional view showing a fourth structure example of the superconducting current lead connection structure according to the present invention.
【図６】本発明に係る超電導電流リードの接続構造体の
第５の構造例を示す断面図。FIG. 6 is a sectional view showing a fifth structure example of the connection structure for a superconducting current lead according to the present invention.
【図７】本発明に係る超電導電流リードの接続構造体の
第６の構造例を示す断面図。FIG. 7 is a sectional view showing a sixth structural example of the connection structure for a superconducting current lead according to the present invention.
【図８】本発明に係る超電導電流リードの接続構造体の
第７の構造例を示す断面図。FIG. 8 is a sectional view showing a seventh structural example of the connection structure for a superconducting current lead according to the present invention.
【図９】従来の超電導電流リードの接続構造体の構造例
を示す断面図。FIG. 9 is a cross-sectional view showing a structural example of a conventional superconducting current lead connection structure.
【図１０】従来の超電導電流リードと常電導導体の他の
構造例を示す断面図。FIG. 10 is a sectional view showing another example of the structure of a conventional superconducting current lead and a normal conductor.
１，５，５′……超電導電流リード部材 1a，5a……
超電導電流リード部材の被接続端子部 1a，5b……超
電導電流リード部材の細径部 ２，７……常電導電流
リード部材 2a，7a……常電導電流リード部材の被接
続端子部 ３……クランプ ４，８…超電導電流リ
ード部材の被接続端子部と細径部の連接部 ６……ボル
トナット ９……接続部1,5,5 '... Superconductive current lead member 1a, 5a ...
Connected terminal portion 1a, 5b of superconducting current lead member Small diameter portion of superconducting current lead member 2, 7 ... Normal conductive current lead member 2a, 7a ... Connected terminal portion of normal current conducting lead member 3 ... Clamps 4, 8 ... Connection part between the connected terminal part and the small diameter part of the superconducting current lead member 6 ... Bolt and nut 9 ... Connection part
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 6/00 ZAA H01F 6/06 ZAA ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H01F 6/00 ZAA H01F 6/06 ZAA
Claims (3)
導電流リード部材と常電導導体部材との電気的な接続構
造体において、 前記各被接合部材は被接合面が互いに密着的な対接可能
な加工面での接合により電気的に接続されていることを
特徴とする超電導電流リードの接続構造体。1. In an electrical connection structure between superconducting current lead members or between a superconducting current lead member and a normal conducting member, each of the members to be joined is a machined surface capable of closely contacting the surfaces to be joined to each other. A connection structure for a superconducting current lead, wherein the connection structure is electrically connected by bonding at step (a).
ド部材と常電導導体部材とがほぼ同形の被接合面で対接
して電気的に接続する接続構造体において、 前記超電導電流リード部材の径が被接合面方向へ徐々に
膨大化されて構成されていることを特徴とする超電導電
流リードの接続構造体。2. A connection structure in which a superconducting current lead member made of an oxide superconductor and a normal conductor member are brought into contact with each other on substantially the same surface to be joined and electrically connected to each other. A connection structure for a superconducting current lead, characterized in that the structure is gradually enlarged in the direction of a surface to be joined.
ド部材と常電導導体部材との電気的な接続構造体におい
て、 前記両被接合部材は被接合面が互いに嵌合・密着して対
接可能な錐形の凹凸面を備え、前記錐形の凹凸面の嵌合
・密着により電気的に接続していることを特徴とする超
電導電流リードの接続構造体。3. An electrical connection structure between a superconducting current lead member made of an oxide superconductor and a normal conductor member, wherein said members to be joined can be brought into contact with each other by joining / adhering surfaces thereof to each other. A connection structure for a superconducting current lead, comprising: a conical concave-convex surface, wherein the conical concave-convex surface is electrically connected by fitting / adhesion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP745692A JP3142934B2 (en) | 1992-01-20 | 1992-01-20 | Superconducting current lead connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP745692A JP3142934B2 (en) | 1992-01-20 | 1992-01-20 | Superconducting current lead connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05198433A JPH05198433A (en) | 1993-08-06 |
| JP3142934B2 true JP3142934B2 (en) | 2001-03-07 |
Family
ID=11666330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP745692A Expired - Fee Related JP3142934B2 (en) | 1992-01-20 | 1992-01-20 | Superconducting current lead connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3142934B2 (en) |
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| JP4491585B2 (en) | 2004-05-28 | 2010-06-30 | Ｄｏｗａエレクトロニクス株式会社 | Method for producing metal paste |
| JP4414821B2 (en) | 2004-06-25 | 2010-02-10 | Ｄｏｗａエレクトロニクス株式会社 | Phosphor, light source and LED |
| JP4511885B2 (en) | 2004-07-09 | 2010-07-28 | Ｄｏｗａエレクトロニクス株式会社 | Phosphor, LED and light source |
| JP4422653B2 (en) | 2004-07-28 | 2010-02-24 | Ｄｏｗａエレクトロニクス株式会社 | Phosphor, production method thereof, and light source |
| JP4933739B2 (en) | 2004-08-02 | 2012-05-16 | Ｄｏｗａホールディングス株式会社 | Phosphor and phosphor film for electron beam excitation, and color display device using them |
| US7138756B2 (en) | 2004-08-02 | 2006-11-21 | Dowa Mining Co., Ltd. | Phosphor for electron beam excitation and color display device using the same |
| JP4524470B2 (en) | 2004-08-20 | 2010-08-18 | Ｄｏｗａエレクトロニクス株式会社 | Phosphor, method for producing the same, and light source using the phosphor |
| US7476338B2 (en) | 2004-08-27 | 2009-01-13 | Dowa Electronics Materials Co., Ltd. | Phosphor and manufacturing method for the same, and light source |
| JP4543250B2 (en) | 2004-08-27 | 2010-09-15 | Ｄｏｗａエレクトロニクス株式会社 | Phosphor mixture and light emitting device |
| JP4543253B2 (en) | 2004-10-28 | 2010-09-15 | Ｄｏｗａエレクトロニクス株式会社 | Phosphor mixture and light emitting device |
| JP4892193B2 (en) | 2005-03-01 | 2012-03-07 | Ｄｏｗａホールディングス株式会社 | Phosphor mixture and light emitting device |
| US7524437B2 (en) | 2005-03-04 | 2009-04-28 | Dowa Electronics Materials Co., Ltd. | Phosphor and manufacturing method of the same, and light emitting device using the phosphor |
| US7443094B2 (en) | 2005-03-31 | 2008-10-28 | Dowa Electronics Materials Co., Ltd. | Phosphor and manufacturing method of the same, and light emitting device using the phosphor |
| US7445730B2 (en) | 2005-03-31 | 2008-11-04 | Dowa Electronics Materials Co., Ltd. | Phosphor and manufacturing method of the same, and light emitting device using the phosphor |
| JP4975269B2 (en) | 2005-04-28 | 2012-07-11 | Ｄｏｗａホールディングス株式会社 | Phosphor and method for producing the same, and light emitting device using the phosphor |
| JP4559325B2 (en) * | 2005-09-06 | 2010-10-06 | ジャパンスーパーコンダクタテクノロジー株式会社 | Current lead for superconducting magnet |
-
1992
- 1992-01-20 JP JP745692A patent/JP3142934B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05198433A (en) | 1993-08-06 |
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