JPH01280383A - Thermal type persistent-current switching element - Google Patents
Thermal type persistent-current switching elementInfo
- Publication number
- JPH01280383A JPH01280383A JP62209015A JP20901587A JPH01280383A JP H01280383 A JPH01280383 A JP H01280383A JP 62209015 A JP62209015 A JP 62209015A JP 20901587 A JP20901587 A JP 20901587A JP H01280383 A JPH01280383 A JP H01280383A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- heating element
- filament
- superconductor
- persistent current
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000002887 superconductor Substances 0.000 claims abstract description 23
- 230000002085 persistent effect Effects 0.000 claims description 30
- 230000000087 stabilizing effect Effects 0.000 claims description 18
- 239000000945 filler Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000006641 stabilisation Effects 0.000 abstract 5
- 238000011105 stabilization Methods 0.000 abstract 5
- 229910000570 Cupronickel Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 4
- 230000005281 excited state Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 229910001275 Niobium-titanium Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- HFYPIIWISGZGRF-UHFFFAOYSA-N [Nb].[Sn].[Sn].[Sn] Chemical compound [Nb].[Sn].[Sn].[Sn] HFYPIIWISGZGRF-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- RJSRQTFBFAJJIL-UHFFFAOYSA-N niobium titanium Chemical compound [Ti].[Nb] RJSRQTFBFAJJIL-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
【発明の詳細な説明】
Ａ、産業上の利用分野
この発明は、超電導線の臨界温度特性を利用した熱式永
久電流スイッチ素子に関する。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to a thermal persistent current switching element that utilizes the critical temperature characteristics of superconducting wire.
Ｂ、従来技術
先ず、熱式永久電流スイッチ素子の原理について説明す
れば、第７図の永久電流スイッチ素子付き超電導コイル
の励磁回路図に示すように、安定化材に超電導体フィラ
メントを埋め込んだ超電導線１に超電導コイル２が接続
され、超電導線１の途中箇所に超電導体フィラメントを
加熱する発熱体３が付設されて熱式永久電流スイフチ素
子４が構成されている。B. Prior Art First, to explain the principle of a thermal persistent current switch element, as shown in the excitation circuit diagram of a superconducting coil with a persistent current switch element in Figure 7, a superconductor in which superconductor filaments are embedded in a stabilizing material is used. A superconducting coil 2 is connected to the wire 1, and a heating element 3 for heating a superconducting filament is attached to a midway point of the superconducting wire 1, thereby forming a thermal persistent current switch element 4.
閉回路に対して、超電導コイル２と熱式永久電流スイッ
チ素子４とが並列になるように、電源５と第１のスイッ
チ６とがリード線７によって接続され、また、発熱体３
にも起動用の第２のスイフチ８が接続されている。図中
、９は、超電導コイル２と熱式永久電流スイッチ素子４
とを極低温状態に冷却維持する低温槽である。The power source 5 and the first switch 6 are connected by a lead wire 7 so that the superconducting coil 2 and the thermal persistent current switch element 4 are in parallel with respect to the closed circuit, and the heating element 3
A second switch 8 for starting is also connected to the terminal. In the figure, 9 indicates the superconducting coil 2 and the thermal persistent current switch element 4.
This is a cryostat that cools and maintains the liquid at an extremely low temperature.
このような構成により、超電導コイル２に電流を励起す
る励起状態と、永久電流が流れている永久電流状態とに
切り換えられるようになっており、両状態それぞれにつ
いて次に説明する。With such a configuration, it is possible to switch between an excited state in which a current is excited in the superconducting coil 2 and a persistent current state in which a persistent current flows, and each of these states will be explained next.
■励起状態
第２のスイッチ８を閉じ、発熱体３によって超電導体フ
ィラメントを加熱し、超電導体１１を臨界温度以上にし
て常電導へと転１多させ、熱式永久電流スイッチ素子４
に電気抵抗を持たせ、その状態で第１のスイッチ６を閉
じ、電ａ５により超電導コイル２に励磁電流を流す。■Excited state The second switch 8 is closed, the superconductor filament is heated by the heating element 3, the superconductor 11 is raised to a critical temperature or higher, and the superconductor 11 changes to normal conductivity by 1, and the thermal persistent current switch element 4
is made to have an electrical resistance, and in this state, the first switch 6 is closed, and an exciting current is caused to flow through the superconducting coil 2 by the electric current a5.
■永久電流状態
超電導コイル２に励磁電流が流れた後に、第２のスイッ
チ８を開き、発熱体３による加熱を停止して超電導体１
１を冷却し、超電導体１１をｐｎ臨界温度りも低下させ
て超電導状態にし、第１のスイッチ６を開き、熱式永久
電流スイッチ素子４を通して超電導コイル２を永久電流
で運転する。■Persistent current state After the excitation current flows through the superconducting coil 2, the second switch 8 is opened, heating by the heating element 3 is stopped, and the superconducting coil 2 is heated.
1, the superconductor 11 is brought to a superconducting state by lowering its pn critical temperature, the first switch 6 is opened, and the superconducting coil 2 is operated with persistent current through the thermal persistent current switch element 4.
ところで、励起状態において、熱式永久電流スイッチ素
子４を通じて電流が流れないようにするために、熱式永
久電流スイッチ素子４を構成する部分の超電導体１１の
抵抗値を大きくする必要がある。この理由は、励起状態
のときの超電導コイルのインダクタンスをり、電流をＩ
Ｌ、超電導体１１の抵抗をＲ，’１ｍをＩ、Ｉとすると
、ｌ、・ｄ Ｔｔ ／ ｄ Ｌ ＝Ｒ−１＊となり、あ
る一定の立ち上がりｄｌＬ／ｄｔでＲでのリーク電流Ｉ
、を減らすためには、Ｒを大きくする必要があるためで
ある。このために、従来では、超電導体フィラメントを
埋め込んだ安定化材として、銅の代わりに抵抗率の高い
白１ｉｉ（ＣｕＮｉ；キエブロニッケル〕を用いていた
。By the way, in order to prevent current from flowing through the thermal persistent current switching element 4 in the excited state, it is necessary to increase the resistance value of the superconductor 11 that constitutes the thermal persistent current switching element 4. The reason for this is that the inductance of the superconducting coil in the excited state is
If L is the resistance of the superconductor 11, and I is the resistance of the superconductor 11, then l, d Tt / d L = R-1*, and the leakage current I in R at a certain rise dlL/dt.
This is because in order to reduce , it is necessary to increase R. For this reason, conventionally, instead of copper, high resistivity white 1ii (CuNi; Kiebro nickel) was used as a stabilizing material in which superconductor filaments were embedded.
Ｃ０発明が解決しようとする問題点
しかしながら、白銅を使用した場合でも、抵抗値を数Ω
以上にするためには、非常に長い距離（例えば、断面積
１胴２であっても、１０Ωの抵抗を得るのに約７０ｍ必
要である）が必要で、熱式永久電流スイッチ素子４が大
きなものになる欠点があり、また、安定化材を加熱する
ための発熱体の加熱量も多くなって冷媒消費量が増大す
る欠点があった。更には、発熱体の熱容量が大きいため
に、臨界温度まで加熱したり、あるいは、ｐ＝界温度以
下に冷却したりするのに時間を要し、スイフチングのＯ
Ｎ、ＯＦＦの速度が遅くなる欠点があった。Problems to be solved by the C0 invention However, even when using cupronickel, the resistance value can be reduced to several Ω.
In order to achieve this, a very long distance (for example, approximately 70 m is required to obtain a resistance of 10 Ω even if the cross-sectional area is 1 cylinder 2) is required, and the thermal persistent current switch element 4 is large. In addition, the amount of heating of the heating element for heating the stabilizing material increases, resulting in an increase in refrigerant consumption. Furthermore, since the heat capacity of the heating element is large, it takes time to heat it up to the critical temperature or cool it below the critical temperature, which reduces the O
There was a drawback that the speed of N and OFF was slow.
そこで、特開昭４９−６９２８９号公報に示されている
ように、超電導線を巻枠に巻きつけて、超電導線をコン
パクトに収める方法が知られているが、この場合、熱式
永久電流スイッチ素子が誘導性となって時定数を持ち、
この部分で磁場が発生して超電導コイルの磁場を乱す欠
点があり、また、白銅の場合は硬くて巻きにくく、製作
に手間を要して高価になる欠点があった。Therefore, as shown in Japanese Patent Application Laid-open No. 49-69289, there is a known method of wrapping the superconducting wire around a winding frame to store the superconducting wire compactly. The element becomes inductive and has a time constant,
This part has the disadvantage that a magnetic field is generated and disturbs the magnetic field of the superconducting coil.Also, in the case of cupronickel, it is hard and difficult to wind, making it laborious and expensive to manufacture.
また、特開昭５７−９２７２３号公報に示されているよ
うに、巻枠に巻きつけた超電導線に沿って発熱体を巻き
つけ、超電導線と発熱体とを良好に熱接触させるように
する方法が知られているが、この場合でも、発熱体が誘
導性となり、前述同様の欠点があった。In addition, as shown in Japanese Patent Application Laid-Open No. 57-92723, a heating element is wound around the superconducting wire wound around the winding frame to bring the superconducting wire and the heating element into good thermal contact. A method is known, but in this case as well, the heating element is inductive and has the same drawbacks as described above.
この発明は、このような事情に鑑みてなされたものであ
って、安定化材の種類のいかんにかかわらず、小型で、
発熱体の熱容量を小さくできるとともに、超電導コイル
の磁場に悪影響を及ぼさない熱式永久電流スイッチ素子
を提供することを目的とする。This invention was made in view of these circumstances, and regardless of the type of stabilizing material, it is small and
It is an object of the present invention to provide a thermal persistent current switching element that can reduce the heat capacity of a heating element and does not adversely affect the magnetic field of a superconducting coil.
Ｄ０問題点を解決するだめの手段
この発明は、このような目的を達成するために、安定化
材に超電導体フィラメントを埋め込んだ超Ｔｓ、導線と
、前記超電導体フィラメントを加熱する発熱体とから成
り、前記超電導体フィラメントが超電導コイルと閉回路
を作り、前記発熱体に流す電流の停止と加熱によって永
久電流のＯＮ、ＯＦＦを行う熱式永久電流スイッチ素子
において、前記超電導線の所定部分の前記安定化材を除
去して前記超電導体フィラメントを露出し、この露出部
分に前記発熱体を付設したことを特徴とする。Means for Solving the D0 Problem In order to achieve the above-mentioned object, the present invention uses a super-Ts in which a superconducting filament is embedded in a stabilizing material, a conducting wire, and a heating element that heats the superconducting filament. In the thermal persistent current switching element, the superconducting filament forms a closed circuit with the superconducting coil, and the persistent current is turned on and off by stopping the current flowing through the heating element and heating it. The method is characterized in that the stabilizing material is removed to expose the superconducting filament, and the heating element is attached to this exposed portion.
巳０作用
上記特徴構成によれば、安定化材を除去して超電導体フ
ィラメントのみによる部分を形成し、その超電導体フィ
ラメントの露出部分を発熱体によって加熱し、発熱体に
よる熱を超電導体フィラメントに直接的に与え、臨界温
度以上に迅速に到達させて党電導状態を得、一方、発熱
体による加熱を停止し、安定化材に影響されずに超電導
体フィラメントから放熱させてしｎ昇温度以下に迅速に
低下して超電導状態を得る。According to the characteristic configuration described above, the stabilizing material is removed to form a portion made only of superconducting filaments, the exposed portion of the superconducting filament is heated by a heating element, and the heat from the heating element is transferred to the superconducting filament. The superconducting filament is heated directly to the superconducting filament without being affected by the stabilizing material. quickly decreases to a superconducting state.
Ｆ、実施例 以下、この発明の実施例を開面に従って説明する。F. Example Embodiments of the present invention will be described below according to an open view.
先ず、この発明の実施例に用いられる超電導線につき、
第１図の側面図、および、第２図の横断面図を用いて説
明する。First, regarding the superconducting wire used in the embodiment of this invention,
This will be explained using a side view in FIG. 1 and a cross-sectional view in FIG. 2.
これらの図において、１は超電導線であり、銅（Ｃｕ）
、キュプロニッケル（ＣｕＮｉ）合金、アルミニウム（
Ａ２）などで形成される安定化材１０中に、ニオブ・チ
タン（ＮｂＴｊ）細線、ニオブ３スズ（Ｎ ｂｓ Ｓ
ｎ ）細線などで構成される多数本の超電導体フィラメ
ント１１を埋め込んで構成されている。In these figures, 1 is a superconducting wire, made of copper (Cu)
, cupronickel (CuNi) alloy, aluminum (
In the stabilizing material 10 formed of A2), niobium titanium (NbTj) fine wire, niobium tritin (N bs S
n) It is constructed by embedding a large number of superconducting filaments 11 made of thin wires or the like.
前記安定化材１０の外表面は、例えば、ポリビニルホル
マール樹脂を主体とする熱硬化性樹脂などを材料とした
絶縁皮膜１２によって被覆されている。The outer surface of the stabilizing material 10 is covered with an insulating film 12 made of, for example, a thermosetting resin mainly composed of polyvinyl formal resin.
前記超電導線１の所定箇所において、その所定長さにわ
たり、溶剤に浸して絶縁皮膜１２を溶解除去した後、更
に、絶縁皮膜１２が除去された部分の所定長さにわたる
部分を硝酸溶液などに浸し、安定化材１０を溶解除去し
て超電導体フィラメント１１が露出されている。After a predetermined length of the superconducting wire 1 is immersed in a solvent to dissolve and remove the insulating film 12, a predetermined length of the superconducting wire 1 from which the insulating film 12 has been removed is further immersed in a nitric acid solution or the like. , the superconductor filaments 11 are exposed by dissolving and removing the stabilizing material 10.
以下、このような超電導体フィラメント１１を露出した
超電導線を用いた各実施例それぞれについて説明する。Each example using a superconducting wire with exposed superconducting filaments 11 will be described below.
策上実施炎
第３図は、第１実施例の拡大断面図を示し、前記超電導
体フィラメント１１の露出部分が、無誘導の皮膜を有す
る抵抗等の発熱体１３に巻きつけられ、その発熱体１３
のリード線１４．１４をも含むように、中空パイプ１５
が発熱体１３に外嵌され、その状態で充填材１６によっ
て一体化されている。FIG. 3 shows an enlarged sectional view of the first embodiment, in which the exposed portion of the superconductor filament 11 is wound around a heating element 13 such as a resistor having a non-inductive film, and the heating element 13
The hollow pipe 15 also includes the lead wire 14.14.
is fitted onto the heating element 13 and integrated with the filler 16 in that state.
前記発熱体１３としては、セラミックヒータなど各種の
ものが採用可能である。As the heating element 13, various types such as a ceramic heater can be used.
また、〜前記中空パイプ１５としては、合成樹脂製のも
のや銅等の金属パイプなど各種材料のものが採用できる
。Further, as the hollow pipe 15, various materials such as a synthetic resin pipe and a metal pipe such as copper can be used.
また、充填材１６としては、エポキシ樹脂などが採用さ
れる。Furthermore, as the filler 16, epoxy resin or the like is employed.
匿又又族斑
第４図は、第２実施例の拡大断面図を示し、この第２実
施例において第１実施例と異なるところは次の点である
。FIG. 4 shows an enlarged sectional view of the second embodiment. The second embodiment differs from the first embodiment in the following points.
即ち、超電導線１工と、発熱体１３のリード線１４．１
４とが折り返しによって一方向に導出され、発熱体１３
が有底筒１７内に収容され、そこに充填材１６が充填さ
れて一体化されている。That is, one superconducting wire and the lead wire 14.1 of the heating element 13
4 is led out in one direction by folding, and the heating element 13
is housed in a bottomed cylinder 17, and a filler 16 is filled therein and integrated.
他の構成は、第１実施例と同じであり、同一番号を付し
て説明を省略する。The other configurations are the same as those in the first embodiment, so the same numbers are given and explanations are omitted.
第１大衡史
第５図は、第３実施例の超電導線の一部切欠側面図、第
６図は、第３実施例の拡大断面図を示し、第１実施例と
異なるところは次の点である。1st Ohira History Figure 5 shows a partially cutaway side view of the superconducting wire of the third embodiment, and Figure 6 shows an enlarged sectional view of the third embodiment.The differences from the first embodiment are as follows. It is.
即ち、超電導体フィラメント１１の露出部分が熱収縮チ
ューブ１日に内嵌されて絶縁されるとともに、エポキシ
樹脂を充填した後に収縮されている。That is, the exposed portion of the superconductor filament 11 is fitted into a heat-shrinkable tube for insulation, and is shrunk after being filled with epoxy resin.
他の構成は、第１実施例と同じであり、同一番号を付し
て説明を省略する。The other configurations are the same as those in the first embodiment, so the same numbers are given and explanations are omitted.
この第３実施例によれば、発熱体１３に巻きつけた超電
導体フィラメント１１どうしがショートしたり、断線し
た一部の超電導体フィラメント１１がショートしたりし
て抵抗値が下がることを良好に防止できる利点がある。According to this third embodiment, it is possible to effectively prevent the resistance value from decreasing due to short-circuiting of the superconducting filaments 11 wound around the heating element 13 or short-circuiting of some of the broken superconducting filaments 11. There are advantages that can be achieved.
超電導体フィラメント１１に対する絶縁処理としては、
第３実施例における熱収縮チューブ１８に内嵌する構成
に限らず、例えば、エナメルやポリビニルホルマール樹
脂を主体とする熱硬化性樹脂（ホルマール）などによる
絶縁皮膜処理を施すようにしても良い。The insulation treatment for the superconductor filament 11 is as follows:
The structure is not limited to fitting inside the heat-shrinkable tube 18 in the third embodiment, but may be treated with an insulation coating using a thermosetting resin (formal) mainly composed of enamel or polyvinyl formal resin, for example.
上記実施例によれば、超電導体フィラメント１１を発熱
体１３に巻きつけて直接的に接触させ、発熱体１３の熱
を超電導体フィラメント１１に良好に伝導する利点を有
しているが、この発明としては、超電導体フィラメント
１１を発熱体１３に巻きつけずに、発熱体１３を超電導
体フィラメント１１の露出部分に近接配置して超電導体
フィラメント１１を加熱するように構成するものでも良
い。According to the above embodiment, the superconducting filament 11 is wound around the heating element 13 and brought into direct contact with the heating element 13, so that the heat of the heating element 13 is effectively conducted to the superconducting filament 11. Alternatively, the superconductor filament 11 may not be wound around the heating element 13, but the heating element 13 may be arranged close to the exposed portion of the superconducting filament 11 to heat the superconducting filament 11.
この発明によれば、超電導体フィラメント１１の露出部
分の長さをわずか１０〜２０ｃｍにしただけでも１Ωの
抵抗を得ることができ、非常に小型化できることが明ら
かであった。。According to this invention, it is clear that even if the length of the exposed portion of the superconductor filament 11 is only 10 to 20 cm, a resistance of 1 Ω can be obtained, and the device can be extremely miniaturized. .
この発明の熱式永久電流スイッチ素子は、磁気浮上列車
や核磁気共鳴装置、超電導電磁推進船、超電導送電、更
には、核融合炉、超電導電力貯蔵、超電導モータや超電
導発電など、各種のものに採用できる。The thermal persistent current switch element of this invention can be used in various devices such as magnetic levitation trains, nuclear magnetic resonance devices, superconducting electromagnetic propulsion vessels, superconducting power transmission, nuclear fusion reactors, superconducting power storage, superconducting motors, and superconducting power generation. Can be adopted.
Ｇ０発明の効果
この発明によれば、安定化材を除去した超電導体フィラ
メントの露出部分を発熱体によって加熱し、常電導状態
では超電導体フィラメントのみによって高い抵抗を得る
から、安定化材の抵抗値に何ら影響されることが無く、
安定化材として特別な白銅を使用したり、また、安定化
材の抵抗値を大きくするために超電導線を長くするとい
ったことを不要にでき、超電導体フィラメントをわずか
な範囲で露出するとともに、その露出部分を加熱するに
足る発熱体を備えれば良く、熱式永久電流スイッチ素子
を小型にできた。G0 Effect of the Invention According to this invention, the exposed portion of the superconducting filament from which the stabilizing material has been removed is heated by a heating element, and in the normal conduction state, high resistance is obtained only by the superconducting filament, so that the resistance value of the stabilizing material is reduced. will not be influenced in any way by
This eliminates the need to use special cupronickel as a stabilizing material or to lengthen the superconducting wire to increase the resistance of the stabilizing material. All that was required was a heating element sufficient to heat the exposed portion, and the thermal persistent current switch element could be made smaller.
また、発熱体を小型で熱容量の小さなものにできるから
、超電導体フィラメントの温度を臨界温度以上に迅速に
立ち上がらせることができ、かつ、放熱によりし臨界温
度以上に迅速に低下させることができ、ＯＮ、ＯＦＦの
切り換えを迅速に行うことができ、しかも、発熱体の消
費電力を低減できる。In addition, since the heating element can be made small and have a small heat capacity, the temperature of the superconductor filament can be quickly raised above the critical temperature, and can be quickly lowered above the critical temperature by heat radiation. Switching between ON and OFF can be performed quickly, and the power consumption of the heating element can be reduced.
また、超電導線や発熱体を幾重にも巻き付けたりしない
から、熱式永久電流スイッチ素子によって磁場を発生せ
ず、超電導コイルの磁場に悪影響を及ぼすことを回避で
きる。Further, since the superconducting wire and the heating element are not wound in multiple layers, no magnetic field is generated by the thermal persistent current switching element, and it is possible to avoid adverse effects on the magnetic field of the superconducting coil.
図面は、この発明に係る熱式永久電流スイッチ素子の実
施例を示し、第１図は、超電導線の側面図、第２図は、
超電導線の横断面図、第３図は、第１実施例の要部の拡
大断面図、第４図は、第２実施例の要部の拡大断面図、
第５図は、第３実施例の超電導線の一部切欠側面図、第
６図は、第３実施例の要部の拡大断面図、第７図は、永
久電流スイッチ素子付き超電導コイルの励磁回路図であ
る。
１・・・超電導線
１０・・・安定化材
１１・・・超１を導体フィラメント
１３・・・発熱体
第１図
：ｆ、５ 口
第７図
手続補正書
り事件の表示
特願昭 ６２−２０９０１５号
２、発明の名称
永久電流スイッチ
３、補ＩＥをする名
・１１件との関係 特許出願人
ノ；（都市中ｙ；（区画〕７：ｒ、桑原町１番地（＋９
’）） 株式会社 島 津 装 作 所代表者 取締
役社１そ 西 八 條 實４ 代理人
５、補正命令の日付
昭和 年 月 １１（自発）
６−補正の対象
明細書における「発明の名称」ならびに「特許請求の範
囲」の欄７−補正の内容
（１）明細書の第１頁第３行目、発明の名称を「永久電
流スイッチ」に（別紙）
２、特許請求の範囲
第（１）項に記載の永久電流スイッチ。The drawings show an embodiment of the thermal persistent current switching element according to the present invention, FIG. 1 is a side view of a superconducting wire, and FIG. 2 is a side view of a superconducting wire.
A cross-sectional view of the superconducting wire, FIG. 3 is an enlarged sectional view of the main part of the first embodiment, FIG. 4 is an enlarged sectional view of the main part of the second embodiment,
Fig. 5 is a partially cutaway side view of the superconducting wire of the third embodiment, Fig. 6 is an enlarged sectional view of the main part of the third embodiment, and Fig. 7 is excitation of the superconducting coil with persistent current switch element. It is a circuit diagram. 1... Superconducting wire 10... Stabilizing material 11... Super 1 conductor filament 13... Heating element Figure 1: f, 5 Figure 7 Indication of procedural amendment case Patent application Sho 62 -209015 No. 2, Name of the invention Persistent current switch 3, Name of supplementary IE/Relationship with 11 cases Patent applicant:
')) Shimadzu Corporation Representative: Director 1: Minoru Nishi Hachijo 4: Agent: 5: Date of amendment order: 11, Showa (self-motivated) 6 - "Name of the invention" in the specification to be amended; Column 7 of "Claims" - Contents of amendment (1) In the third line of page 1 of the specification, change the title of the invention to "persistent current switch" (attached sheet) 2. Scope of claims (1) Persistent current switch as described in Section.
Claims (2)
電導線と、前記超電導体フィラメントを加熱する発熱体
とから成り、前記超電導体フィラメントが超電導コイル
と閉回路を作り、前記発熱体に流す電流の停止と加熱に
よって永久電流のＯＮ、ＯＦＦを行う熱式永久電流スイ
ッチ素子において、前記超電導線の所定部分の前記安定
化材を除去して前記超電導体フィラメントを露出し、こ
の露出部分に前記発熱体を付設したことを特徴とする熱
式永久電流スイッチ素子。(1) Consisting of a superconducting wire with a superconducting filament embedded in a stabilizing material and a heating element that heats the superconducting filament, the superconducting filament forms a closed circuit with a superconducting coil, and the current flowing through the heating element is In a thermal persistent current switching element that turns on and off a persistent current by stopping and heating, the stabilizing material in a predetermined portion of the superconducting wire is removed to expose the superconducting filament, and the heating element is placed in this exposed portion. A thermal persistent current switch element characterized by being equipped with.
体に巻きつけたことを特徴とする特許請求の範囲第（１
）項に記載の熱式永久電流スイッチ素子。(2) Claim No. 1 characterized in that the exposed portion of the superconductor filament is wound around the heating element.
) Thermal persistent current switch element described in item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62209015A JPH01280383A (en) | 1987-08-21 | 1987-08-21 | Thermal type persistent-current switching element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62209015A JPH01280383A (en) | 1987-08-21 | 1987-08-21 | Thermal type persistent-current switching element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01280383A true JPH01280383A (en) | 1989-11-10 |
Family
ID=16565856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62209015A Pending JPH01280383A (en) | 1987-08-21 | 1987-08-21 | Thermal type persistent-current switching element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01280383A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021171872A1 (en) * | 2020-02-27 | 2021-09-02 | 株式会社日立製作所 | Superconducting magnet, superconducting wire, and method for producing superconducting magnet |
-
1987
- 1987-08-21 JP JP62209015A patent/JPH01280383A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021171872A1 (en) * | 2020-02-27 | 2021-09-02 | 株式会社日立製作所 | Superconducting magnet, superconducting wire, and method for producing superconducting magnet |
| JP2021136341A (en) * | 2020-02-27 | 2021-09-13 | 株式会社日立製作所 | Superconducting magnet, superconducting wire rod, and production method of the superconducting magnet |
| EP4113548A4 (en) * | 2020-02-27 | 2024-03-13 | Hitachi, Ltd. | Superconducting magnet, superconducting wire, and method for producing superconducting magnet |
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