JPH065604B2 - Superconducting stranded wire - Google Patents
Superconducting stranded wireInfo
- Publication number
- JPH065604B2 JPH065604B2 JP61015712A JP1571286A JPH065604B2 JP H065604 B2 JPH065604 B2 JP H065604B2 JP 61015712 A JP61015712 A JP 61015712A JP 1571286 A JP1571286 A JP 1571286A JP H065604 B2 JPH065604 B2 JP H065604B2
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- stranded wire
- substance
- wire
- superconducting composite
- 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 - Fee Related
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
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は超電導撚線に係り、特に、パルス運転、あるい
は交流運転に使用するに好適な超電導撚線に関する。TECHNICAL FIELD The present invention relates to a superconducting stranded wire, and more particularly to a superconducting stranded wire suitable for use in pulse operation or AC operation.
従来のパルス運転用、あるいは交流運転用の超電導線に
ついては、スーパーコンダクテイング・マグネツト，エ
ム・エヌ・ウイルソン著，クラレンドン・プレス・オツ
クスフオード発行（1983年）第３０７頁から第３０９頁
（SuperconductingMagnets,M.N.Wilson,CLARENDON PRES
SOXFORD,(1983)pp307〜309）において論じられている。Regarding conventional superconducting wires for pulse operation or AC operation, Superconducting Magnet, M. N. Wilson, Clarendon Press Oxford published (1983), pages 307 to 309 (SuperconductingMagnets, MNWilson). , CLARENDON PRES
SOXFORD, (1983) pp307-309).
一般に超電導撚線はＣｕ、あるいはＣｕ−Ｎｉなどの常
電導性基材中に、たとえばＮｂ−Ｔｉなどの超電導フイ
ラメントの複数本を内蔵した超電導複合素線の複数本を
撚り合せた構造を持つ。撚線構造とする最大の目的は、
通常電流を大きくし、かつ交流損失を低減させることに
ある。撚線構造を大別すると、数本の素線を撚り合せた
ものをさらに多数組撚り合せたいわゆるリツツワイヤー
タイプ、多数本の素線を編み組みしたいわゆるブレード
タプ、及び複数本の素線を撚り合せた後平角状に成形し
たいわゆる成形撚線タイプの３種類がある。交流損失の
低減だけを考えれば、各々の素線を完全に電気絶縁すれ
ば良いが、この場合、各素線間での分流現象が阻害され
ることから各素線の安定性が悪くなり、本来の臨界電流
まで通電できなくなる。したがつて、交流の印加状態に
応じて、交流損失の許容される範囲内での各素線間の導
電性を確保することになる。従来、このような目的で、
Ｐｂ−Ｓｎ，Ｓｎ−Ａｇなどの半田を素線に被覆した
り、あるいは素線表面に酸化皮膜を形成させたりしてい
た。In general, a superconducting stranded wire has a structure in which a plurality of superconducting composite strands having a plurality of superconducting filaments such as Nb-Ti incorporated therein are twisted together in a normal-conducting substrate such as Cu or Cu-Ni. The biggest purpose of making a stranded wire structure is
It is to increase the normal current and reduce the AC loss. The stranded wire structure is roughly classified into a so-called Ritsu wire type in which a large number of sets of several strands are twisted together, a so-called blade tap in which a large number of strands are braided, and a plurality of strands are twisted together. There are three types of so-called formed stranded wire types which are formed into a rectangular shape after being combined. Considering only the reduction of AC loss, it is sufficient to completely electrically insulate each strand, but in this case, the shunting phenomenon between each strand is hindered and the stability of each strand deteriorates. It will not be possible to energize to the original critical current. Therefore, according to the applied state of the alternating current, the conductivity between the individual wires is secured within the range where the AC loss is allowed. Conventionally, for this purpose,
The solder has been coated with solder such as Pb-Sn or Sn-Ag, or an oxide film has been formed on the surface of the strand.
ところで、従来の撚線では、各素線にPb−SnあるいはＳ
ｎ−Ａｇ等の半田被覆を行つた場合には、これら半田の
電気比抵抗は１０-7Ωcmオーダであり、高速パルス運
転、あるいは商用周波数で用いるには電気比抵抗が小さ
く、十分に交流損失を低減させることができない。ま
た、特にＰｂ−Ｓｎ半田は臨界温度が７Ｋ程度の超電導
体であり、４．２Ｋの液体ヘリウム中で用いると半田材
そのもののヒステリシス損失も余分に加わることにな
る。さらに、半田被覆をする場合に２００〜３００℃ま
で温度を上げる必要があり、そのために超電導特性が低
下する懸念もある。また、素線表面に酸化皮膜を形成さ
せた場合には、半田に比し電気比抵抗の大きな皮膜とす
ることが可能であるが、必ずしも所望の電気比抵抗値を
得られるとは限らない。また、均一な皮膜を得ることが
難かしく、撚線時に皮膜が破損したりして性能の良い撚
線が得られない。By the way, in the conventional stranded wire, Pb-Sn or S
When a solder coating such as n-Ag is applied, the electrical resistivity of these solders is on the order of 10 -7 Ωcm, and the electrical resistivity is small and AC loss is sufficient for use in high-speed pulse operation or commercial frequency. Cannot be reduced. Further, especially Pb-Sn solder is a superconductor having a critical temperature of about 7K, and when it is used in liquid helium at 4.2K, hysteresis loss of the solder material itself is additionally added. Further, when the solder coating is performed, it is necessary to raise the temperature to 200 to 300 ° C., which may cause deterioration of superconducting characteristics. Further, when an oxide film is formed on the surface of the wire, it is possible to obtain a film having a larger electrical resistivity than solder, but it is not always possible to obtain a desired electrical resistivity value. In addition, it is difficult to obtain a uniform film, and the film is damaged during twisting, so that a twisted wire with good performance cannot be obtained.
したがつて、本発明の目的は、上記従来の欠点を無くし
パルス運転、あるいは交流運転に好適な超電導撚線を提
供するにある。Therefore, it is an object of the present invention to provide a superconducting stranded wire suitable for pulse operation or AC operation without the above-mentioned conventional drawbacks.
上記目的は、導電性基材中に複数の超電導フイラメント
を内蔵した超電導複合素線の複数本が、導電性微粉体と
絶縁性有機物とからなる電気抵抗性物質を介して相互に
接続された超電導撚線とすることにより達成される。A plurality of superconducting composite strands having a plurality of superconducting filaments in a conductive base material are connected to each other through an electrically resistive substance composed of a conductive fine powder and an insulating organic substance. This is achieved by using a stranded wire.
導電性微粉体と絶縁性有機物とからなる電気抵抗性物質
は、導電性微粉体の種類、あるいは導電性微粉体と絶縁
性有機物との配合割合を変えることにより、電気抵抗性
物質の電気比抵抗を所望の値にすることが容易である。
ここで、導電性微粉体としては、銀、銅、アルミニウ
ム、ニツケルなどの金属、酸化スズ、酸化インジウムな
どの金属酸化物、あるいはその他の金属間化合物などが
使用でき、その粒径は数十μｍ以下の微粒である。絶縁
性有機物としてはエポキシ系樹脂、ポリエステル系樹
脂、ウレタン系樹脂、アクリル系樹脂などが使用でき
る。導電性微粉体が絶縁性有機物質の中で互いに接触す
ることにより全体として導電性が得られる。また、絶縁
性有機物は硬化前は液体状であり、導電性微粒体は容易
に混合される。超導電素線への被覆は容易であり、室温
で硬化させることも、あるいは加熱して硬化させること
もできる。これら絶縁性有機物は接着性に優れており、
硬化後も安定した機械的強度が保たれる。The electric resistance substance consisting of conductive fine powder and insulating organic substance is the electrical resistivity of the electric resistance substance by changing the kind of conductive fine powder or the mixing ratio of conductive fine powder and insulating organic substance. Can be easily set to a desired value.
Here, as the conductive fine powder, a metal such as silver, copper, aluminum, nickel, a metal oxide such as tin oxide or indium oxide, or another intermetallic compound can be used, and the particle size thereof is several tens of μm. The following fine particles. As the insulating organic material, epoxy resin, polyester resin, urethane resin, acrylic resin and the like can be used. When the conductive fine particles are in contact with each other in the insulating organic substance, conductivity is obtained as a whole. Moreover, the insulating organic material is in a liquid state before being cured, and the conductive fine particles are easily mixed. The coating on the superconducting wire is easy and can be cured at room temperature or by heating. These insulating organic materials have excellent adhesiveness,
Stable mechanical strength is maintained even after curing.
以下、本発明の一実施例を第１図により説明する。該図
に示す本実施例の超電導撚線は、電気抵抗性物質２で表
面を被覆した超導電複合素線１の７本が撚り合わされて
構成されている超伝導複合素線１は、外径寸法がφ０．
５mmで、直径０．７４μｍのＮｂ−Ｔｉ超導電フイラメ
ント94,686本が、導電性基材としてのＣｕとＣｕ−Ｎｉ
合金複合マトリツクス中に埋込まれた構造である。Ｃ
ｕ、およびＣｕ−ＮｉとＮｂ−Ｔｉとの断面積比は、各
々、１．４５で、Ｃｕ−ＮｉはＣｕ、およびＮｂ−Ｔｉ
を分割するように配置されている。そして、この超導電
複合素線１は、ピツチ６．４mmでツイストされている。
この超導電複合素線１は、従来から行われている複合加
工法により容易に作ることができた。An embodiment of the present invention will be described below with reference to FIG. The superconducting stranded wire of the present embodiment shown in the figure has a superconducting composite element wire 1 formed by twisting seven superconducting composite element wires 1 whose surface is coated with an electric resistance substance 2 and having an outer diameter. The size is φ0.
94,686 Nb-Ti superconducting filaments with a diameter of 5 mm and a diameter of 0.74 μm were made of Cu and Cu-Ni as conductive base materials.
It is a structure embedded in an alloy composite matrix. C
The cross-sectional area ratios of u and Cu-Ni and Nb-Ti are 1.45, respectively, and Cu-Ni is Cu and Nb-Ti.
Are arranged to divide. The superconducting composite wire 1 is twisted with a pitch of 6.4 mm.
The superconducting composite element wire 1 could be easily manufactured by the composite processing method which has been conventionally performed.
つぎに、導電性微粉体としてのＣｕ微粉を７０％の体積
割合となるようにエポキシ系樹脂に撹拌混合し、その中
に上記で得られた超電導複合素線１を浸漬し、ダイスを
通して１０μｍ厚さの被膜を形成させた。熱硬化型の樹
脂を使用したので、１３０℃で３０分間の加温をを行い
被覆を接着硬化させ電気抵抗性物質２の被膜を形成させ
た。Next, Cu fine powder as conductive fine powder is mixed by stirring in an epoxy resin so as to have a volume ratio of 70%, and the superconducting composite element wire 1 obtained above is immersed therein and passed through a die to obtain a thickness of 10 μm. A coating film was formed. Since a thermosetting resin was used, heating was performed at 130 ° C. for 30 minutes to bond and cure the coating to form a film of the electric resistance substance 2.
ついで、電気抵抗性物質２の被膜を形成させた超電導複
合素線１の７本を撚線機にて撚線ピツチ１５mmで撚り合
せ、本発明の超電導撚線１０を得た。Then, seven superconducting composite strands 1 on which the coating of the electric resistance substance 2 was formed were twisted together with a twisting machine at a twisting pitch of 15 mm to obtain a superconducting twisted wire 10 of the present invention.
得られた超電導撚線１０の臨界電流を測定したところ、
４．２Ｋの液体ヘリウム中、５Ｔの磁界中で６７５Ａで
あつた。超電導複合素線の同様な条件下での臨界電流が
９６Ａであつたので、本発明の撚線では安定性が確保さ
れていることが示された。When the critical current of the obtained superconducting stranded wire 10 was measured,
It was 675 A in 4.2 K liquid helium in a 5 T magnetic field. Since the critical current of the superconducting composite element wire under the same condition was 96 A, it was shown that the stranded wire of the present invention ensured the stability.
また、別途、厚さ１０μｍ、幅２mm、長さ１０cmの電気
抵抗性物質被膜を作製し、４．２Ｋの液体ヘリウム中で
電気抵抗測定を行つたところ、４．２×１０-5Ωcmの値
を得た。この値は、Ｐｂ−Ｓｎ半田に比し約２桁大きい
値であつた。また、得られた超電導撚線１０の外観検
査、断面の顕微鏡観察の結果、超電導複合素線１と電気
抵抗性物質２の被膜との密着性は良好で、電気抵抗性物
質２の被膜の欠落は見られなかつた。Separately, an electric resistance material film having a thickness of 10 μm, a width of 2 mm and a length of 10 cm was prepared, and the electric resistance was measured in liquid helium at 4.2 K. The value was 4.2 × 10 −5 Ωcm. Got This value was about two orders of magnitude higher than that of Pb-Sn solder. Further, as a result of the appearance inspection of the obtained superconducting twisted wire 10 and the microscopic observation of the cross section, the adhesion between the superconducting composite element wire 1 and the coating of the electric resistance substance 2 is good, and the coating of the electric resistance substance 2 is missing. Was never seen.
なお、本実施例においては超電導複合素線を７本用いた
が、本数には特にこだわらない。また、超電導複合素線
の１部をたとえばスレンテスステール線などの機械強度
部材と取り替えたり、たとえばＣｕ、あるいはＡｌなど
の電気伝導性の良好な安定化部材と取り替えてもさしつ
かえない。In this embodiment, seven superconducting composite wires were used, but the number is not particularly limited. It is also possible to replace a part of the superconducting composite element wire with a mechanical strength member such as a Srentes stale wire or a stabilizing member having a good electric conductivity such as Cu or Al.
このように、本実施例の超電導撚線とすれば、電気抵抗
性物質２の電気比抵抗を所望の値にすることが容易であ
り、電気抵抗性物質２と超電導複合素線１との密着性が
良好で機械的にもすぐれており、パルス運転、あるいは
交流運転に好適な超電導撚線が得られる。As described above, with the superconducting stranded wire of the present embodiment, it is easy to set the electric resistivity of the electric resistance substance 2 to a desired value, and the electric resistance substance 2 and the superconducting composite element wire 1 adhere to each other. The superconducting stranded wire is excellent in mechanical properties and mechanically excellent, and is suitable for pulse operation or AC operation.
第２図は本発明による他の実施例である。第１図に示し
た実施例では、撚線間に隙間３を有していたが、実施例
２ではこの隙間も電気抵抗性物質２で充填したものであ
る。FIG. 2 shows another embodiment according to the present invention. In the embodiment shown in FIG. 1, the gap 3 was provided between the twisted wires, but in the embodiment 2, this gap is also filled with the electric resistance substance 2.
実施例１では相互の電気抵抗性物質２は互いに機械的な
接触状態であつたが、この場合には、各超電導複合素線
１は相互に接着され、全体としての超電導撚線１０の機
械的強度を大きくする効果がある。In Example 1, the mutually electrically resistive substances 2 were in mechanical contact with each other, but in this case, the respective superconducting composite wires 1 are adhered to each other, and the mechanical properties of the superconducting stranded wire 10 as a whole. It has the effect of increasing the strength.
以上説明した本発明の超電導撚線によれば、常電性基材
中に複数の超電導フイラメントを内蔵した超電導複合素
線の表面に、導電性微粉体と絶縁性有機物とからなる電
気抵抗性物質を被覆し、該電気抵抗性物質を介して前記
超電導複合素線を相互に接続したものであるから、所望
の電気比抵抗値を有する電気抵抗性物質が容易に得ら
れ、かつ超電導複合素線との接着性が優れていることか
ら、パルス運転あるいは交流運転に好適な超電導撚線が
容易に得られる。According to the superconducting stranded wire of the present invention described above, the surface of the superconducting composite element wire containing a plurality of superconducting filaments in the normal-electric substrate has an electrically resistive substance composed of conductive fine powder and an insulating organic substance. And the superconducting composite wires are connected to each other through the electric resistance substance, an electric resistance substance having a desired electric resistivity value can be easily obtained, and the superconducting composite wires The superconducting stranded wire suitable for pulse operation or AC operation can be easily obtained because of its excellent adhesiveness with.
第１図は本発明の超電導撚線の一実施例を示す断面図、
第２図は本発明の超電導撚線の他の実施例を示す断面図
である。 １…超電導複合素線、２…電気抵抗性物質、３…隙間、
１０…超電導撚線。FIG. 1 is a sectional view showing an embodiment of the superconducting stranded wire of the present invention,
FIG. 2 is a sectional view showing another embodiment of the superconducting stranded wire of the present invention. 1 ... Superconducting composite wire, 2 ... Electrically resistive material, 3 ... Gap,
10 ... Superconducting stranded wire.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭48−52395（ＪＰ，Ａ) 特開 昭53−56997（ＪＰ，Ａ) 特開 昭58−150215（ＪＰ，Ａ) 特開 昭59−136711（ＪＰ，Ａ) 特開 昭60−130007（ＪＰ，Ａ) 実開 昭49−74477（ＪＰ，Ｕ) 実開 昭52−27787（ＪＰ，Ｕ) 特公 昭43−8308（ＪＰ，Ｂ１) 特公 昭43−27027（ＪＰ，Ｂ１) 特公 昭43−28227（ＪＰ，Ｂ１) 特公 昭50−21840（ＪＰ，Ｂ１) ─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-48-52395 (JP, A) JP-A-53-56997 (JP, A) JP-A-58-150215 (JP, A) JP-A-59- 136711 (JP, A) JP 60-130007 (JP, A) Actually open 49-74477 (JP, U) Actually open 52-27787 (JP, U) JP 43-8308 (JP, B1) JP-B-43-27027 (JP, B1) JP-B-43-28227 (JP, B1) JP-B-50-21840 (JP, B1)
Claims (3)
を内蔵した超電導複合素線の複数本を撚り合せて形成さ
れる超電導撚線において、前記各超電導複合素線の表面
に導電性微粉体と絶縁性有機物とからなる電気抵抗性物
質を被覆し、該電気抵抗性物質を介して前記超電導複合
素線が相互に接続されていることを特徴とする超電導撚
線。1. A superconducting stranded wire formed by twisting a plurality of superconducting composite strands containing a plurality of superconducting filaments in a normal-electric substrate, wherein conductive fine powder is provided on the surface of each superconducting composite strand. A superconducting stranded wire, characterized in that the superconducting composite element wire is covered with an electrically resistive substance composed of a body and an insulating organic substance, and the superconducting composite element wires are mutually connected via the electrically resistive substance.
に生ずる隙間にも前記電気抵抗性物質を充填したことを
特徴とする特許請求の範囲第１項記載の超電導撚線。2. The superconducting stranded wire according to claim 1, wherein a gap generated when the superconducting composite wires are connected to each other is also filled with the electrically resistive substance.
ウム、ニツケルなどの金属、酸化スズ、酸化インジウム
などの金属酸化物、あるいはその他の金属間化合物など
を用い、一方、前記絶縁性有機物としてエポキシ系樹
脂、ポリエステル系樹脂、ウレタン系樹脂、アクリル系
樹脂などを用いたことを特徴とする特許請求の範囲第１
項記載の超電導撚線。3. A metal such as silver, copper, aluminum or nickel, a metal oxide such as tin oxide or indium oxide, or another intermetallic compound is used as the conductive fine powder, while the insulating organic substance is used. Claim 1 characterized by using epoxy resin, polyester resin, urethane resin, acrylic resin, etc.
Superconducting stranded wire according to the item.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61015712A JPH065604B2 (en) | 1986-01-29 | 1986-01-29 | Superconducting stranded wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61015712A JPH065604B2 (en) | 1986-01-29 | 1986-01-29 | Superconducting stranded wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62176007A JPS62176007A (en) | 1987-08-01 |
| JPH065604B2 true JPH065604B2 (en) | 1994-01-19 |
Family
ID=11896377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61015712A Expired - Fee Related JPH065604B2 (en) | 1986-01-29 | 1986-01-29 | Superconducting stranded wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH065604B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101665038B1 (en) * | 2016-01-11 | 2016-10-13 | 한국기초과학지원연구원 | electrically conductive material impregnated no-insulation superconducting coil and manufacturing apparatus of the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316506A (en) * | 1986-07-07 | 1988-01-23 | 古河電気工業株式会社 | Ac superconductive cable conductor |
-
1986
- 1986-01-29 JP JP61015712A patent/JPH065604B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101665038B1 (en) * | 2016-01-11 | 2016-10-13 | 한국기초과학지원연구원 | electrically conductive material impregnated no-insulation superconducting coil and manufacturing apparatus of the same |
| WO2017122947A1 (en) * | 2016-01-11 | 2017-07-20 | 한국기초과학지원연구원 | Non-insulated superconducting coil impregnated with conductive material and device for manufacturing same |
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| Publication number | Publication date |
|---|---|
| JPS62176007A (en) | 1987-08-01 |
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