JPS6022383A - Thermal process permanent current switch - Google Patents
Thermal process permanent current switchInfo
- Publication number
- JPS6022383A JPS6022383A JP58130643A JP13064383A JPS6022383A JP S6022383 A JPS6022383 A JP S6022383A JP 58130643 A JP58130643 A JP 58130643A JP 13064383 A JP13064383 A JP 13064383A JP S6022383 A JPS6022383 A JP S6022383A
- Authority
- JP
- Japan
- Prior art keywords
- current switch
- persistent current
- superconducting
- wire
- lead
- 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
- 238000000034 method Methods 0.000 title abstract 3
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 230000002085 persistent effect Effects 0.000 claims description 54
- 239000000956 alloy Substances 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 22
- 230000007704 transition Effects 0.000 abstract description 6
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 238000005339 levitation Methods 0.000 abstract description 4
- 239000003822 epoxy resin Substances 0.000 abstract description 3
- 229920000647 polyepoxide Polymers 0.000 abstract description 3
- 229920003002 synthetic resin Polymers 0.000 abstract description 2
- 239000000057 synthetic resin Substances 0.000 abstract description 2
- 230000005284 excitation Effects 0.000 description 10
- 229910003336 CuNi Inorganic materials 0.000 description 6
- 230000035939 shock Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/30—Devices switchable between superconducting and normal states
- H10N60/35—Cryotrons
- H10N60/355—Power cryotrons
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、超電導磁気浮上式鉄道等に用いられる超電導
磁石とともに使用される熱式永久電流スイッチに係り、
特に、超低温に冷却された超電導線の超電導状態と常電
導状態とをヒータの熱により切換える熱式永久電流スイ
ッチに関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a thermal persistent current switch used with superconducting magnets used in superconducting magnetic levitation railways, etc.
In particular, the present invention relates to a thermal persistent current switch that uses heat from a heater to switch between a superconducting state and a normal conducting state of a superconducting wire cooled to an ultra-low temperature.
従来、熱式永久電流スイッチは、例えば第１図に示すよ
うに超電導磁気浮上式鉄道における超電導磁石の励磁回
路に使用されている。Conventionally, thermal persistent current switches have been used, for example, in excitation circuits for superconducting magnets in superconducting magnetic levitation railways, as shown in FIG.
第１図において、１は車両に塔載される断熱構造の低温
容器（クライオスタット）であり、内部に、例えば液体
ヘリウムを有し、図示しない圧縮様、冷凍機等を備えた
冷却機器に１９容器内が超低温に保たれる。この低温容
器１内には超電導磁石の超電導コイル２と永久電流スイ
ッチ３とが収納される。超電導コイル２と永久電流スイ
ッチ３はパワーリード線４により並列に接続され、電源
スイッチ５．５ヲ介して励磁電源６から直流電力が供給
される。また永久電流スイッチ３にはスイツチ焼断防止
用の放電抵抗７が並列に接続される。In Fig. 1, reference numeral 1 denotes a cryostat (cryostat) with an adiabatic structure mounted on a vehicle. The inside is kept at an extremely low temperature. A superconducting coil 2 of a superconducting magnet and a persistent current switch 3 are housed in this low temperature container 1. The superconducting coil 2 and persistent current switch 3 are connected in parallel by a power lead wire 4, and DC power is supplied from an excitation power source 6 via a power switch 5.5. Further, a discharge resistor 7 for preventing switch burnout is connected in parallel to the persistent current switch 3.
永久電流スイッチ３は、超電導コイル２に並列接続され
た超電導線１０と、超電導線１０の近傍に配置され該超
電導線１０ヲ加熱するヒータ１１とを具え、スイッチ１
２を介して加熱電源１３からヒータ１１に電流全供給し
、該ヒータ１１の熱により超電導線１０の超電導状態（
オン状態）と常電導状態（オフ状態）の切換えを行なう
ものである。これを模式的に表現すれば第１図中の二点
鎖線で示すようなスイッチＡとなる。また永久電流スイ
ッチ３はスイッチ本体内に収納した超電導線１０ヲ外部
に口出し線１０′として引出し、この口出し線１０′全
パワーリード線４に接続することにより、超電導線１０
と超電導コイル２とを並列に接続する。The persistent current switch 3 includes a superconducting wire 10 connected in parallel to the superconducting coil 2 and a heater 11 disposed near the superconducting wire 10 to heat the superconducting wire 10.
2, the heating power source 13 supplies the entire current to the heater 11, and the heat of the heater 11 changes the superconducting state of the superconducting wire 10 (
This is used to switch between a normal conduction state (on state) and a normal conduction state (off state). If this is expressed schematically, it will be a switch A as shown by the chain double-dashed line in FIG. In addition, the persistent current switch 3 allows the superconducting wire 10 housed in the switch body to be drawn out as a lead wire 10', and by connecting this lead wire 10' to all power lead wires 4, the superconducting wire 10
and superconducting coil 2 are connected in parallel.
そして永久電流スイッチ３を用いて超電導コイル１にエ
ネルギーを蓄えるには、まずスイッチ１２をオン状態に
して加熱電源１３全ヒータ１１に印加し、超電導線１０
’（ｊ、常電導抵抗Ｒ１８を有するオフ状態にしておき
、電源スイッチ５，５全所定時間のみ投入する。すると
所定時間、励磁電源６から超電導コイル１へ励磁電流が
供給され、しかる後スイッチ１２ヲオフ状態にすると、
超電導線１０がオン状態となって該超電導線１０と超電
導コイル２とで閉ループが形成され、該超電導コイル２
には励磁電流が永続して供給される。To store energy in the superconducting coil 1 using the persistent current switch 3, first turn on the switch 12 and apply it to all heaters 11 of the heating power source 13, and then
'(j, with the normal conducting resistance R18 in the OFF state, the power switches 5 and 5 are all turned on only for a predetermined period of time. Excitation current is then supplied from the excitation power source 6 to the superconducting coil 1 for a predetermined period of time, and then the switch 12 When turned off,
When the superconducting wire 10 is turned on, a closed loop is formed between the superconducting wire 10 and the superconducting coil 2, and the superconducting coil 2
is continuously supplied with an excitation current.
しかしながら、この種の永久電流スイッチ３にあっては
、スイッチオフ時においても超電導線１０の常電導抵抗
Ｒ，で該永久電流スイッチ３がショートされているため
、次のような問題がある、。However, this type of persistent current switch 3 has the following problem because the persistent current switch 3 is short-circuited by the normal conductive resistance R of the superconducting wire 10 even when the switch is off.
永久電流スイッチ３がオフの状態で超電導コイル２を励
消磁する時、コイル両端電圧Ｌ＋により該永久電流スイ
ッチ３に分流が起こるため、永久電流スイッチ３のオフ
時の抵抗ｍが小さい場合には、■永久電流スイッチ３へ
の分流電流が大きくなす、これによりジュール発熱量Ｑ
ｓ （−（”１）４ ）が大きくなって永久電流スイッ
チ３での郁駄なヘリウムの蒸発が多くなる。また励磁速
度Ｉ ＹＯ速くすることができない。When the superconducting coil 2 is excited and demagnetized with the persistent current switch 3 in the OFF state, a shunt occurs in the persistent current switch 3 due to the voltage L+ across the coil, so if the resistance m when the persistent current switch 3 is OFF is small, ■The shunt current to the persistent current switch 3 becomes large, which results in Joule heat generation Q
s (-("1)4) increases, and the wasteful evaporation of helium in the persistent current switch 3 increases. Also, the excitation speed IYO cannot be increased.
■超電導コイル２を励磁する際、励磁電源６が所定電流
を出力しても、その一部が永久電流スイッチ３に分流し
ており、この分流電流が超電導コイル２に流れ込むのに
ががる時間が大きい。■When exciting the superconducting coil 2, even if the excitation power supply 6 outputs a predetermined current, a part of it is shunted to the persistent current switch 3, and it takes a long time for this shunted current to flow into the superconducting coil 2. is large.
■前記ＣＤ 、■よジバワーリード線４は長時間通電可
能な太いものにせざるを得ないため、パワーリード線４
を介しての低温容器１内への熱侵入量が多くなる。■The above CD, ■The power lead wire 4 has to be thick enough to be energized for a long time.
The amount of heat entering into the low-temperature container 1 through this increases.
■低温容器ｌは高度の断熱構造をとってお９、前記■、
■のように内部に熱発生または外部から熱侵入があると
、わずかの熱によって超電導コイル２及び永久電流スイ
ッチ３を冷却している液体ヘリウムが蒸発する。すると
蒸発したヘリウムを冷却、再液化して低温容器１に戻し
、超電導コイル２及び永久電流スイッチ３を超低温にし
て超電導状態に保つための冷却機器の負荷が大きくなる
。■The low-temperature container l has a highly insulated structure.
When heat is generated inside or heat enters from the outside as in (2), the liquid helium cooling the superconducting coil 2 and persistent current switch 3 evaporates due to a small amount of heat. This increases the load on the cooling equipment that cools and re-liquefies the evaporated helium and returns it to the low-temperature container 1, which brings the superconducting coil 2 and persistent current switch 3 to an ultra-low temperature to maintain them in a superconducting state.
■永久電流状態で超電導コイル２を運転中、永久電流ス
イッチ３が常電導転移（クエンチ）した場合、超電導コ
イル２に蓄積された磁気エネルギをスイッチ焼断防止用
の放電抵抗７と超電導線１０の抵抗へで分けあうが、永
久電流スイッチ３の分担分Ｑ、が次式で示すように大き
くなり、焼断しやすい。■If the persistent current switch 3 transitions to normal conductivity (quenches) while the superconducting coil 2 is operating in a persistent current state, the magnetic energy accumulated in the superconducting coil 2 is transferred to the discharge resistor 7 for preventing switch burnout and the superconducting wire 10. However, the persistent current switch 3's share Q becomes large as shown in the following equation, and is likely to burn out.
但し、Ｒ８；放電抵抗７の抵抗値
従って、この種の熱式永久電流スイッチ３は、オフ時の
抵抗Ｒｓが高抵抗であればあるほど、励消時間が短く、
かつ冷却機器の負荷も軽減され、クエンチ時における永
久電流スイッチ３の焼４１事故を防止することができる
。However, R8: resistance value of the discharge resistor 7 Therefore, in this type of thermal persistent current switch 3, the higher the resistance Rs when off, the shorter the excitation time.
In addition, the load on the cooling equipment is reduced, and it is possible to prevent the persistent current switch 3 from burning out during quenching.
そこで、スイッチオフ時の抵抗Ｒ，Ｉ全大きくするため
、次のような提案がなされている。第２図は熱式永久電
流スイッチの外観図、第３図は第２図中のＩ−Ｉ線部分
断面図である。永久電流スイッチ３は、外側が耐寒性樹
脂等でほぼ円柱状にモールドされ、その内部には超電導
線１０及びヒータ１１等が収容され、超電導線１０の端
末部分である口出し線１０′が口出し線押え２０で固定
されて外部に取り出される。そして超電導線１０は、Ｎ
ｂＴ ｉ 系合金からなる超電導線のフィラメント１０
ａと、ＣｕＮｉ系合金からなる常電導金属の母材１０ｂ
とで構成される。超電導線１０ｂとして用いられている
金属ＣｕＮｉ系合金は、比抵抗が常電導状態の超電導金
属ＮｂＴ ｉ合金と同じ程度で、しかも＠ＣｕＯ比抵抗
の約１０００倍であるから、永久電流スイッチ３のオフ
時抵抗ｎ８’ｆｃ非常に大きくすることができる。Therefore, the following proposal has been made to increase the total resistances R and I when the switch is off. FIG. 2 is an external view of the thermal persistent current switch, and FIG. 3 is a partial sectional view taken along the line II in FIG. 2. The persistent current switch 3 is molded with a cold-resistant resin or the like into a substantially cylindrical shape on the outside, and the superconducting wire 10, heater 11, etc. are housed inside, and the lead wire 10', which is the terminal part of the superconducting wire 10, is the lead wire. It is fixed with a presser foot 20 and taken out to the outside. The superconducting wire 10 is N
Superconducting wire filament 10 made of bT i alloy
a, and a normal conductive metal base material 10b made of a CuNi alloy.
It consists of The metal CuNi-based alloy used as the superconducting wire 10b has a specific resistance similar to that of the superconducting metal NbTi alloy in the normal conducting state, and is approximately 1000 times as large as the @CuO specific resistance, so that the persistent current switch 3 can be turned off. The resistance n8'fc can be made very large.
しかし、超電導線１０の母材１０ｂとして用いられてい
る金属ＣｕＮｉ合金は、銅Ｃｕに比較して熱の拡散が悪
い。このため合金ＣｕＮｉ／ＮｂＴ１の超電導線１０で
構成した熱式水入電流スイッチ３にあっては、該永久電
流スイッチ３及び超電導コイル２を収納した低温容器１
に外部から衝撃、振動等が加わった場合、該永久電流ス
イッチ３の動きにより、永久電流スイッチ３０口出し部
において口出し線１０′と口出し線押え２０との摩擦等
によシ発熱し、この発熱が局部に集中し、順次拡大して
超電導線１０が超電導状態から常電導状態に転移し、永
久電流スイッチ３がオフ状卯になる仁とがあった。すな
わち永久電流スイッチとして非常に不安定なものであっ
た。このため、永久電流スイッチ３の固定を十分に行な
うことが重要であり、固定のために低温容器１を強固に
する必要があった。ところが低温容器１を耐衝撃性や耐
振動性に優れる強固なイｉり造にすると、低温容器１が
大形化しかつ重量も大きくなって、軽量、小形化を図る
うえでの大きな問題となっていた。However, the metal CuNi alloy used as the base material 10b of the superconducting wire 10 has poor heat diffusion compared to copper Cu. For this reason, in a thermal water-immersed current switch 3 constructed of a superconducting wire 10 of alloy CuNi/NbT1, a low-temperature container 1 containing the persistent current switch 3 and a superconducting coil 2 is used.
When external shocks, vibrations, etc. are applied to the persistent current switch 3, the movement of the persistent current switch 3 generates heat due to friction between the lead wire 10' and the lead wire holder 20 at the lead portion of the persistent current switch 30, and this heat generation There was a case where the superconducting wire 10 was concentrated locally and gradually expanded, causing the superconducting wire 10 to transition from a superconducting state to a normal conducting state, and the persistent current switch 3 to be turned off. In other words, it was extremely unstable as a persistent current switch. Therefore, it is important to sufficiently fix the persistent current switch 3, and it is necessary to make the low temperature container 1 strong for fixing. However, if the low-temperature container 1 is made of a strong material with excellent shock resistance and vibration resistance, the low-temperature container 1 will become larger and heavier, which poses a major problem when trying to make it lighter and smaller. was.
本発明は、上記問題点を除去するためになされたもので
、永久電流スイッチの口出し部での口出し線と口出し線
押えとの摩擦によって発生する熱が局部に集中すること
を防ぎ、超電導線の超電導状態から常電導状態への転移
全防止した信頼性の高い熱式永久電流スイッチを提供す
るξと全目的とする。The present invention has been made in order to eliminate the above-mentioned problems, and prevents the heat generated by friction between the lead wire and the lead wire holder at the lead part of the persistent current switch from concentrating locally. The overall purpose is to provide a highly reliable thermal persistent current switch that completely prevents transition from a superconducting state to a normal conducting state.
本発明は、上記目的を達成するために、超電導線の口出
し部’ｋｃｕ等の熱拡散の優れた金属部材で被イ、この
部分を【Ｍ定するようにしている。In order to achieve the above object, the present invention covers the leading part of the superconducting wire with a metal member having excellent thermal diffusion, such as the leading part 'kcu', and makes this part [M].
以下、添付図面に基づいて本発明の一実施例全説明する
。なお、以下の図面において、前記第１図及び第２図中
の要素と同一のものには同一の符号がイ」されている。Hereinafter, one embodiment of the present invention will be fully explained based on the accompanying drawings. In the following drawings, the same elements as those in FIGS. 1 and 2 are designated by the same reference numerals.
第３図はこの実施例に係る永久電流スイッチの外観図、
第４図は第３図中の１１−■線部分断面図である。この
永久電流スイッチ３は、第１図で示すように、ＮｂＴｉ
系合金等のフィラメント１０ａとＣｕＮｉ系合金等の母
材１０ｂで構成される超電導線１１と、ヒータ１１とを
具え、該超電導線１０は、例えば合成樹脂の巻枠に無誘
導に巻かれエポキシ樹脂等により含浸されている。そし
て該エポキシ樹脂等により超電導線１０及びヒータ１１
がモールドされ、外側がほぼ円柱状に形成されている。FIG. 3 is an external view of the persistent current switch according to this embodiment,
FIG. 4 is a partial sectional view taken along the line 11--■ in FIG. 3. This persistent current switch 3 is made of NbTi as shown in FIG.
The superconducting wire 11 includes a filament 10a made of a CuNi-based alloy or the like and a base material 10b made of a CuNi-based alloy, and a heater 11. It is impregnated with etc. Then, the superconducting wire 10 and the heater 11 are made of the epoxy resin or the like.
is molded, and the outside is formed into a roughly cylindrical shape.
さらに口出し線１０′は熱拡散の優れたＣｕ等の金属部
材３０で被われ、断面弧状の口出し線押え２０で永久電
流スイッチ本体の外周に固定され外部に取り出される。Further, the lead wire 10' is covered with a metal member 30 made of Cu or the like having excellent heat diffusion, is fixed to the outer periphery of the persistent current switch body by a lead wire presser 20 having an arcuate cross section, and is taken out to the outside.
ここで超電導線１０と金属部材３０とは半田付け、ある
いは圧接等によシ一体化されている。Here, the superconducting wire 10 and the metal member 30 are integrated by soldering, pressure welding, or the like.
而してこの実施例に係る永久電流スイッチ３０口出し部
において、外部から加わった衝撃、振動等により口出し
線１０′と口出し押え加との間に摩擦が生じ、これによ
り熱が発生したとしても、口出し部の表面に発生した熱
はＣｕ等の金属部側３０の全体のみに拡り、内部の超電
導線１０にはあ゛まり伝わらない。従って摩擦によって
発生した熱が超電導線１０の一部に局部的に集中するこ
とによって起こる超電導状態から常電導状態への転移を
防ぐことができ永久電流スイッチ３の安定化を向上させ
ることができる。また、口出し線１０′が金属部材３０
で被われることによって口出し線１０’の機械的強度が
増し、破口出し線１０′が折れるということも防ぐこと
ができる。なお、永久電流スイッチ３に衝撃、振動等が
加わった場合、永久電流スイッチ本体内の超電導線１０
は、合成樹脂等の巻枠に無誘導に巻かれ、エポキシ樹脂
等により含浸されているため、永久電流スイッチ本体内
部で超電導線１０の摩擦がおこることはない。Therefore, in the persistent current switch 30 according to this embodiment, even if friction is generated between the lead wire 10' and the lead presser due to shocks, vibrations, etc. applied from the outside, and heat is generated due to this, The heat generated on the surface of the lead part spreads only to the entire metal part side 30 such as Cu, and is not very much transmitted to the superconducting wire 10 inside. Therefore, it is possible to prevent the transition from the superconducting state to the normal conducting state, which is caused by the heat generated by friction being locally concentrated in a part of the superconducting wire 10, and the stabilization of the persistent current switch 3 can be improved. Further, the lead wire 10' is connected to the metal member 30.
The mechanical strength of the lead wire 10' is increased by covering the lead wire 10', and it is possible to prevent the break lead wire 10' from breaking. Note that if shock, vibration, etc. are applied to the persistent current switch 3, the superconducting wire 10 inside the persistent current switch body may
Since the superconducting wire 10 is non-inductively wound around a winding frame made of synthetic resin or the like and impregnated with epoxy resin or the like, friction of the superconducting wire 10 does not occur inside the persistent current switch main body.
上記実施例では、永久電流スィッチ３全超電専磁気浮上
式鉄道における超電導コイル２の励磁回路に用いた例を
示したが、該永久電流スイッチ３を他の回路に使用でき
ることはいうまでもない。In the above embodiment, an example was shown in which the persistent current switch 3 was used in an excitation circuit for a superconducting coil 2 in an all-superelectric magnetic levitation railway, but it goes without saying that the persistent current switch 3 can be used in other circuits. .
以上説明したように、本発明では、超電導線の口出し部
を熱伝散係数の大きい金属部材で被い、この部分を固定
したので、外部からの＠撃、振動等により口出し部に摩
擦熱が発生しても、この熱が金属部材を介して速やかに
外部に拡散され消失するため、′超電導状態から常電導
状態への転移を防止でき、永久スイッチとしての信頼性
を向上させることができる。As explained above, in the present invention, the leading part of the superconducting wire is covered with a metal member with a large heat dissipation coefficient and this part is fixed, so that frictional heat is not generated at the leading part due to external impact, vibration, etc. Even if heat is generated, this heat is quickly diffused to the outside through the metal member and dissipated, which prevents the transition from the superconducting state to the normal conducting state and improves the reliability of the permanent switch.
第１図は従来の熱式永久電流スイッチの構成を説明する
ための回路図、第２図は第１図中の熱式永久電流スイッ
チの外観図、第３図は第２図中の１−１線部分断面図、
第４図は本発明の一実施例に係る永久電流スイッチの外
観図、第５図は第４図中のＩＩ −ＩＩ線部分断面図で
ある。
１・・・低温容器、２・・・超電導コイル、３・・・永
久電流スイッチ、６・・・励磁電源、１０・・・超電導
線、１０′・・・口出し線、１０ａ・・・超電導線のフ
ィラメント、１０ｈ・・・超電導線の母材、１１・・・
ヒータ、２０・・・口出し線押え９３０・・・金属部材
。
出願人代理人 猪 股 消
Ｐａｌ 圃
ｂ２ 閏
馬３ 図
５４ 図
熱５ 図Figure 1 is a circuit diagram for explaining the configuration of a conventional thermal persistent current switch, Figure 2 is an external view of the thermal persistent current switch in Figure 1, and Figure 3 is 1-1 in Figure 2. 1 line partial sectional view,
FIG. 4 is an external view of a persistent current switch according to an embodiment of the present invention, and FIG. 5 is a partial sectional view taken along the line II--II in FIG. 4. DESCRIPTION OF SYMBOLS 1... Low temperature container, 2... Superconducting coil, 3... Persistent current switch, 6... Excitation power supply, 10... Superconducting wire, 10'... Lead wire, 10a... Superconducting wire Filament, 10h... Base material of superconducting wire, 11...
Heater, 20... Lead wire presser 930... Metal member. Applicant's representative Boar Crotch Pal Field b2 Jumping horse 3 Figure 54 Figure 5
Claims (3)
導状態の切換えをヒータの“熱により行なう熱式永久電
流スイッチにおいて、 前記超電導線の口出し部を熱伝散係数の大きい金属部材
で被い、この部分を固定したことを特徴とする熱式永久
電流スイッチ。(1) In a thermal persistent current switch that uses heat from a heater to switch a superconducting wire cooled to an ultra-low temperature between a superconducting state and a normal conducting state, the lead-out portion of the superconducting wire is covered with a metal member having a large heat dissipation coefficient. A thermal persistent current switch characterized by this part being fixed.
ントとこれを被うＣｕＮＩ系合金からなる母材とで構成
した特許請求の範囲第１項記載の熱式永久電流スイッチ
。(2) The thermal persistent current switch according to claim 1, wherein the superconducting wire is composed of a filament made of a NbTi alloy and a base material made of a CuNI alloy covering the filament.
許請求の範囲第１項記載の熱式永久電流スイッチ。(3) The thermal persistent current switch according to claim 1, wherein the lead portion of the superconducting wire is covered with a copper member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58130643A JPS6022383A (en) | 1983-07-18 | 1983-07-18 | Thermal process permanent current switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58130643A JPS6022383A (en) | 1983-07-18 | 1983-07-18 | Thermal process permanent current switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6022383A true JPS6022383A (en) | 1985-02-04 |
Family
ID=15039151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58130643A Pending JPS6022383A (en) | 1983-07-18 | 1983-07-18 | Thermal process permanent current switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6022383A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5757257A (en) * | 1993-09-20 | 1998-05-26 | Hitachi, Ltd. | Permanent current switch and superconducting magnet system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5057596A (en) * | 1973-09-21 | 1975-05-20 | ||
| JPS5181078U (en) * | 1974-12-20 | 1976-06-28 |
-
1983
- 1983-07-18 JP JP58130643A patent/JPS6022383A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5057596A (en) * | 1973-09-21 | 1975-05-20 | ||
| JPS5181078U (en) * | 1974-12-20 | 1976-06-28 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5757257A (en) * | 1993-09-20 | 1998-05-26 | Hitachi, Ltd. | Permanent current switch and superconducting magnet system |
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