JPS5988882A - Thermal superconducting switch - Google Patents
Thermal superconducting switchInfo
- Publication number
- JPS5988882A JPS5988882A JP57197677A JP19767782A JPS5988882A JP S5988882 A JPS5988882 A JP S5988882A JP 57197677 A JP57197677 A JP 57197677A JP 19767782 A JP19767782 A JP 19767782A JP S5988882 A JPS5988882 A JP S5988882A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- switch
- wire
- superconducting switch
- thermal superconducting
- 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
- 239000002887 superconductor Substances 0.000 claims description 3
- 229910000657 niobium-tin Inorganic materials 0.000 claims 1
- 238000004804 winding Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 230000002085 persistent effect Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910003336 CuNi Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
この発明は超電導電磁石を永久電流運転する際に必要な
熱式超電導スイッチに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field to Which the Invention Pertains] The present invention relates to a thermal superconducting switch necessary for persistent current operation of a superconducting electromagnet.
従来、熱式超電導スイッチは超１導スイッチ素子導線と
してＮｂ’ｌ”ｊ のみかＣｕＮｉ マトリックスの極
細多芯ＮｂＴｉ 超電導線を用いており、これをスイッ
チＯＦＦ用ヒーターと共に断熱性の樹脂中に埋め込んで
用いていた。Conventionally, thermal superconducting switches have used ultra-fine multi-core NbTi superconducting wires with only Nb'l"j or CuNi matrix as the super single-conducting switch element wires, and this has been embedded in an insulating resin along with a heater for turning off the switch. I was using it.
しかしＮｂＴｉ 超電導＃！Ａは第１図に示すように液
体ヘリウム温ｌ１１ｅ（４，２ｋ） での磁界電流Ｉ
ｃ（４，２ｋ）に対するある温度（’ｒＫ）での磁界電
流Ｉｃ（Ｔ）の比は温度の上昇と共に急激に低下し、こ
の比が０．５になるのは約６．４にである。超電導スイ
ッチの進軍′１流をその素子溝縁の性能のｌ ／ ２と
した場合このスイッチに許される温度上昇は２．２にと
なる。これ以上の温度上昇がスイッチに進延中、スイッ
チ内の内部摩擦等により発生した時はスイッチは常電導
転移し、電磁石の永久電流運転は不能となる。However, NbTi superconductivity #! A is the magnetic field current I at the liquid helium temperature l11e (4,2k) as shown in Figure 1.
The ratio of the magnetic field current Ic(T) at a certain temperature ('rK) to c(4,2k) decreases rapidly with increasing temperature, and this ratio becomes 0.5 at about 6.4. . If the advancing current of a superconducting switch is 1/2 of the performance of the element groove edge, the temperature rise allowed for this switch is 2.2. If a further temperature rise occurs in the switch due to internal friction within the switch, the switch enters a normal conduction state and the electromagnet becomes unable to operate with persistent current.
この発明は上述した従来のＮｂＴｉ Ｍｉ電導線を用い
る超電導スイッチの欠点を改良したもので、温度上昇に
対してより安定な熱式超電導スイッチを提供することを
目的とする。This invention improves the drawbacks of the conventional superconducting switch using NbTi Mi conductive wire as described above, and aims to provide a thermal superconducting switch that is more stable against temperature increases.
この発明は超電導スイッチ素子導線として従来のＮｂＴ
’ｉ 超電４＃ｊｌに替えてＮｂ、Ｓｎ超電導線を用い
る。Ｎ ｂ、Ｓ ｎ極細多芯線は、製造上Ｎ ｂ３ Ｓ
ｎフィラメントのまわｔ）をＣｕ５ｎ （青銅）のマト
リックスがとり囲む構造になっており、このような超゛
屯導勝を用いれば常電導時の抵抗値が高い超電導スイッ
チを構成できる。This invention utilizes conventional NbT as a superconducting switch element conductor wire.
'i Use Nb, Sn superconducting wire instead of superconductor 4#jl. N b, S n ultra-fine multifilamentary wire is manufactured with N b3 S
It has a structure in which a matrix of Cu5n (bronze) surrounds an N filament (t), and by using such a superconducting structure, a superconducting switch with a high resistance value during normal conduction can be constructed.
この発明によれば、ＮｂＴｉ超電導線Ａの代りにＮｂ、
Ｓｎ超電導線Ｂを用いるため、Ｉｉ図に示すように、
超電導スイッチの通電々流をその素子導線の通電容せの
１／２とした場合、このスイッチに許される温度上昇は
４．４にとなる。この許容温度上昇中はＮｂＴｉ の場
合の２倍であり、スイッチが内部摩擦等により発熱昇温
した場合もＮｂＴｉの場合よりはるかに常電導転移の可
能性は少なくなる。According to this invention, instead of the NbTi superconducting wire A, Nb,
Since Sn superconducting wire B is used, as shown in Figure Ii,
If the current flow of a superconducting switch is set to 1/2 of the current carrying capacity of the element conductor wire, the temperature rise allowed for this switch will be 4.4. This allowable temperature increase is twice as long as in the case of NbTi, and even if the switch heats up due to internal friction or the like, the possibility of normal conduction transition is much lower than in the case of NbTi.
従って通電状態即ちスイッチＯＮ状態での安定性が同上
する。Therefore, the stability in the energized state, that is, in the switch ON state, is the same as above.
用いる超電導線としては第２図に示す熱処理前の矩形断
面のもの又は第３図に示す熱処理ずみのテープ状のもの
である。ｌ ＶｉＮｂ３Ｓｎフィラメント、２はＣｕ５
ｎマトリツクスである。The superconducting wire used has a rectangular cross section before heat treatment as shown in FIG. 2, or a tape-shaped wire after heat treatment as shown in FIG. 3. l ViNb3Sn filament, 2 is Cu5
n matrix.
この超電４勝３を例えば第４図に示すように無誘導に巻
線する。熱処理前の超電導線を用いた場合は、巻線後熱
処理を施す。テープ状の熱処理ずみ超電導線は巻線によ
る引張りや曲げによる超電４特性の劣化は少ないが、矩
形断面のものは巻線前に熱処理すると巻線歪による超電
導特性の劣化が激しいからである。This superelectric wire is wound without induction as shown in FIG. 4, for example. When using superconducting wire before heat treatment, heat treatment is performed after winding. This is because the superconducting properties of tape-shaped heat-treated superconducting wires are less likely to deteriorate due to tension or bending due to winding, but if a wire with a rectangular cross section is heat-treated before winding, the superconducting characteristics will deteriorate significantly due to strain on the windings.
巻線後スイッチ全体をスイッチＯＦＦ用ヒータとともに
断熱性の樹脂５中にうめ込んで児成する。After winding, the entire switch is embedded in a heat insulating resin 5 together with a switch-off heater.
完成後このスイッチを例えは超電導コイルに接続するが
、この除目出し都４に接続作業時の曲げ等によりこの部
分の超電導特性の劣化がおこる場合もある。しかし日出
【１部４け断熱性樹脂５の外にあるため成体ヘリウムに
よる冷却効果は良く、超電導特性の劣化をも補償し得る
。After completion, this switch is connected to, for example, a superconducting coil, but the superconducting characteristics of this portion may deteriorate due to bending of the cutout capital 4 during connection work. However, since it is located outside the heat insulating resin 5, the cooling effect of adult helium is good and can compensate for the deterioration of superconducting properties.
第１図は、従来のＮ ｂ Ｔ Ｉ線を用いた場合の温度
マージン（２，２ｋ ）に比し、本発明のＮｂ、Ｓｎｉ
を用いた場合の温度マージン（４，４ｋ）が高いことを
示す持回、
第４図は、超電導スイッチの具体例を示す斜視図である
。
３・・・超電４線、 ４・・・口出し部、５・・・
樹脂。
代理人 弁理士 則近憲佑（ほか１名）第 １ 図
第２図 第３図Figure 1 shows that compared to the temperature margin (2.2k) when using the conventional NbTI line, the temperature margin of the present invention's Nb, Sni
Figure 4 is a perspective view showing a specific example of a superconducting switch. 3...Superelectric 4 wire, 4...Outlet part, 5...
resin. Agent Patent attorney Kensuke Norichika (and 1 other person) Figure 1 Figure 2 Figure 3
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57197677A JPS5988882A (en) | 1982-11-12 | 1982-11-12 | Thermal superconducting switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57197677A JPS5988882A (en) | 1982-11-12 | 1982-11-12 | Thermal superconducting switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5988882A true JPS5988882A (en) | 1984-05-22 |
Family
ID=16378497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57197677A Pending JPS5988882A (en) | 1982-11-12 | 1982-11-12 | Thermal superconducting switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5988882A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204650A (en) * | 1990-04-27 | 1993-04-20 | Railway Technical Research Institute | Switch for controlling current flow in superconductors |
| US5394130A (en) * | 1993-01-07 | 1995-02-28 | General Electric Company | Persistent superconducting switch for conduction-cooled superconducting magnet |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52106294A (en) * | 1976-03-03 | 1977-09-06 | Hitachi Ltd | Thermal permanent current switch |
-
1982
- 1982-11-12 JP JP57197677A patent/JPS5988882A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52106294A (en) * | 1976-03-03 | 1977-09-06 | Hitachi Ltd | Thermal permanent current switch |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204650A (en) * | 1990-04-27 | 1993-04-20 | Railway Technical Research Institute | Switch for controlling current flow in superconductors |
| US5394130A (en) * | 1993-01-07 | 1995-02-28 | General Electric Company | Persistent superconducting switch for conduction-cooled superconducting magnet |
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