JP3154711B2 - Superconducting wire and superconducting coil using the same - Google Patents
Superconducting wire and superconducting coil using the sameInfo
- Publication number
- JP3154711B2 JP3154711B2 JP31969889A JP31969889A JP3154711B2 JP 3154711 B2 JP3154711 B2 JP 3154711B2 JP 31969889 A JP31969889 A JP 31969889A JP 31969889 A JP31969889 A JP 31969889A JP 3154711 B2 JP3154711 B2 JP 3154711B2
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- Prior art keywords
- superconducting
- coil
- current
- wire
- superconducting wire
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Classifications
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- 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】 ［発明の目的］ （産業上の利用分野） 本発明は、クエンチ伝幡速度を向上させた超電導線材
および超電導コイルに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a superconducting wire and a superconducting coil having an improved quench propagation speed.
（従来の技術） Nb−Ti合金のような超電導体を用いた超電導線材は、
電気抵抗が非常に小さく、直流的には非常に小さいジュ
ール損で電流を流すことが可能な線材として知られてい
る。また、このような超電導線材は、各種電力機器など
として実際に使用するにあたっては、コイル化して用い
ることが一般的である。(Conventional technology) A superconducting wire using a superconductor such as an Nb-Ti alloy is
It is known as a wire rod having a very small electric resistance and capable of flowing a current with a very small Joule loss in terms of direct current. When such a superconducting wire is actually used as various power devices, it is common to use it in the form of a coil.
ところで、上述したような超電導線材に変動磁場中で
電流を流そうとすると、主にヒステリシス損失と結合損
失とからなる交流損失が生じることが知られている。こ
のため、パルス運転や商用周波数（50Hzまたは60Hz）で
の運転を目指した交流用超電導線材の開発にあたって
は、上記交流損失を低減することが重要である。By the way, it is known that when an electric current is caused to flow through a superconducting wire as described above in a fluctuating magnetic field, an AC loss mainly composed of a hysteresis loss and a coupling loss occurs. For this reason, in developing an AC superconducting wire aiming at pulse operation or operation at a commercial frequency (50 Hz or 60 Hz), it is important to reduce the AC loss.
上述した交流損失のうち結合損失は、Nb−Ti合金など
の超電導芯線を埋設するマトリックスとして、比抵抗の
大きい金属たとえばCu−Ni合金を用いることにより低減
できるため、最近、交流で使用する超電導コイルでは、
マトリックスとして比抵抗の大きい金属を用いた超電導
線材が多用されつつある。Among the AC losses described above, the coupling loss can be reduced by using a metal having a large specific resistance, such as a Cu-Ni alloy, as a matrix for burying a superconducting core wire such as an Nb-Ti alloy. Then
A superconducting wire using a metal having a large specific resistance as a matrix is being widely used.
（発明が解決しようとする課題） しかしながら、上記マトリックスとして比抵抗の大き
い金属を用いた超電導線材は、結合損失を低減すること
が可能である半面、以下に示すような難点があった。(Problems to be Solved by the Invention) However, a superconducting wire using a metal having a large specific resistance as the matrix can reduce the coupling loss, but has the following disadvantages.
すなわち、上述したような超電導コイルに大電流を流
して運転した場合、超電導線材がクエンチした際に、ジ
ュール熱によって超電導線材が焼き切れる可能性が高い
という難点がある。これは、たとえばNb−Ti超電導体の
クエンチ伝幡速度は数10m/秒程度と遅いため、結合損失
を低減するために比抵抗の大きい金属を超電導線材のマ
トリックスとして使用すると、クエンチによってマトリ
ックス側に転流した電流をすみやかに拡散させることが
できなくなり、局部的に過大なジュール熱の発生を招い
てしまうためである。That is, when the superconducting coil is operated by passing a large current through it as described above, there is a disadvantage that when the superconducting wire is quenched, there is a high possibility that the superconducting wire is burned off by Joule heat. This is because, for example, the quench propagation speed of an Nb-Ti superconductor is as low as several tens of m / sec, so if a metal having a large specific resistance is used as the matrix of the superconducting wire to reduce the coupling loss, the quench will cause the matrix side to move. This is because the commutated current cannot be promptly diffused, and locally excessive Joule heat is generated.
このように、マトリックスとして比抵抗の大きい金属
を用いた場合に、超電導体のクエンチ伝幡速度が遅い
と、超電導線材が焼損する危険性が高いために、超電導
体のクエンチ伝幡速度を高めることが強く望まれてい
る。また、超電導コイルを用いた限流器などにおいて
は、直接クエンチ伝幡速度が特性を左右するために、同
様にクエンチを極めて速く伝幡させることが強く望まれ
ている。As described above, when a metal having a large specific resistance is used as the matrix, if the quench propagation speed of the superconductor is low, there is a high risk that the superconducting wire will burn out, so the quench propagation speed of the superconductor should be increased. Is strongly desired. Further, in a current limiter using a superconducting coil or the like, since the quench propagation speed directly affects the characteristics, it is strongly desired that the quench be propagated very quickly.
本発明は、上述したような課題に対処するためになさ
れたもので、マトリックス材として比抵抗の大きい金属
しか用いていない超電導線材において、たとえば焼損な
どを防止するために、クエンチを極めて速く伝幡させる
ことを可能にした超電導線材を提供することを目的とし
ており、またこのような超電導線材を用いることによっ
て実用性を高めるとともに、特性の向上を図った超電導
コイルを提供することを目的としている。The present invention has been made in order to address the above-described problems, and in a superconducting wire using only a metal having a high specific resistance as a matrix material, for example, in order to prevent burning, etc., a quench is transmitted very quickly. It is an object of the present invention to provide a superconducting wire that enables the superconducting wire to be used, and to provide a superconducting coil having improved practicability and characteristics by using such a superconducting wire.
［発明の構成］ （課題を解決するための手段） すなわち本発明の超電導線材は、高電気抵抗を有する
金属マトリックス内に、Nb−Ti合金からなる超電導芯線
を埋設してなる超電導線材において、前記超電導芯線は
１〜0.2重量％の範囲の強磁性体を含有することを特徴
としている。[Structure of the Invention] (Means for Solving the Problems) That is, the superconducting wire of the present invention is a superconducting wire obtained by embedding a superconducting core wire made of an Nb-Ti alloy in a metal matrix having high electric resistance. The superconducting core wire is characterized by containing a ferromagnetic material in the range of 1 to 0.2% by weight.
また、本発明の超電導コイルは、上記超電導線材を巻
回してなることを特徴としている。Further, a superconducting coil of the present invention is characterized in that the superconducting wire is wound.
本発明の超電導線材における超電導芯線は、強磁性体
を含有するNb−Ti合金からなるものである。本発明に使
用する強磁性体としては、たとえばFe、Ni、Co、Gdなど
の金属元素、Fe−Ni系、Fe−Ni−Co系、Fe−Ni−Cr系な
どの強磁性合金や、さらには化合物系強磁性体などの各
種強磁性体を用いることが可能であるが、芯線中への均
一分散を考慮した場合、金属系の強磁性体が好ましく用
いられる。これら強磁性体は、超電導体としてのNb−Ti
合金の臨界温度を低下させ、これにより超電導線材のク
エンチ伝幡速度が上昇する。The superconducting core wire in the superconducting wire of the present invention is made of an Nb-Ti alloy containing a ferromagnetic material. Examples of the ferromagnetic material used in the present invention include metal elements such as Fe, Ni, Co, and Gd, ferromagnetic alloys such as Fe-Ni-based, Fe-Ni-Co-based, and Fe-Ni-Cr-based, and It is possible to use various ferromagnetic materials such as a compound ferromagnetic material, but in consideration of uniform dispersion in a core wire, a metal ferromagnetic material is preferably used. These ferromagnetic materials are Nb-Ti
It lowers the critical temperature of the alloy, thereby increasing the quench propagation speed of the superconducting wire.
これら強磁性体は、マトリックス材を含めた超電導線
材中に１重量％〜0.2重量％程度の範囲で含有させる。
強磁性体の含有量が0.2重量％未満であると、臨界温度
低下効果が充分に得られず、また１重量％を超えると超
電導特性に悪影響を及ぼす恐れがあるためである。These ferromagnetic materials are contained in the superconducting wire including the matrix material in a range of about 1% by weight to 0.2% by weight.
If the content of the ferromagnetic material is less than 0.2% by weight, the effect of lowering the critical temperature cannot be sufficiently obtained, and if it exceeds 1% by weight, the superconductivity may be adversely affected.
また、本発明の超電導線材におけるマトリックス材と
しては、一般的に用いられているCu−Ni系合金やCu−Mn
系合金などの比抵抗の大きい金属が用いられる。Further, as the matrix material in the superconducting wire of the present invention, generally used Cu-Ni-based alloy or Cu-Mn
A metal having a large specific resistance such as a system alloy is used.
（作 用） 本発明の超電導線材においては、Nb−Ti合金からなる
超電導芯線が１重量％〜0.2重量％の範囲の強磁性体を
含有している。このNb−Ti芯線中に拡散した強磁性体
は、Nb−Ti中のクーパー対を破壊するように作用し、こ
れによって超電導線材の臨界温度が低下する。ただし、
臨界電流や臨界磁場はほとんど変動しない。(Operation) In the superconducting wire of the present invention, a superconducting core wire made of an Nb-Ti alloy contains a ferromagnetic material in a range of 1% by weight to 0.2% by weight. The ferromagnetic material diffused into the Nb-Ti core acts to destroy the Cooper pair in the Nb-Ti, thereby lowering the critical temperature of the superconducting wire. However,
The critical current and critical magnetic field hardly fluctuate.
ここで、超電導体の臨界温度を低下させることによっ
て、超電導体のクエンチ伝幡速度を高められることが知
られている。したがって、本発明の超電導線材は、マト
リックスとして高電気抵抗を有する金属を用い、結合損
失を低減した上で、クエンチを極めて速く伝幡させるこ
とが可能となるため、大電流通電時などにおいても焼損
などが防止される。Here, it is known that the quench propagation speed of the superconductor can be increased by lowering the critical temperature of the superconductor. Therefore, the superconducting wire of the present invention uses a metal having a high electric resistance as a matrix, reduces the coupling loss, and makes it possible to propagate the quench very quickly. Is prevented.
また、上述したような超電導線材を用いて構成した本
発明の超電導コイルは、結合損失を低減してたとえば交
流での使用に適合させた上で、焼損などが生じる危険性
が極めて小さくなり、実用性が向上する。また、クエン
チ伝幡速度が速いことを利用した超電導電力機器などへ
の応用が可能となる。In addition, the superconducting coil of the present invention constituted by using the above-described superconducting wire reduces the coupling loss and, for example, is adapted for use with an alternating current, and the risk of burning or the like becomes extremely small. The performance is improved. In addition, it can be applied to superconducting power devices utilizing the high quench propagation speed.
（実施例） 次に、本発明の超電導線材および超電導コイルの実施
例について説明する。(Example) Next, an example of a superconducting wire and a superconducting coil of the present invention will be described.
まず、本発明の超電導線材および超電導コイルの具体
的製造例とその特性評価について説明する。First, a specific production example of the superconducting wire and the superconducting coil of the present invention and evaluation of their characteristics will be described.
実施例 外径50mm×内径40mmの10％Ni−Cu合金からなるパイプ
内に、強磁性体としてNiを0.5重量％含有する外径40mm
のNb−Ti合金からなる超電導芯線を挿入し、これに減面
加工を施しつつ断面六角形状に加工した。次に、これを
多数本束ね、同様な10％Ni−Cu合金からなるパイプ内に
挿入して線引き加工を行った。そして、これらを繰り返
し行って、外径0.9mmで10％Ni−Cuマトリックス内にNi
含有Nb−Ti芯線を多数埋設した（Nb−Ti芯線数：数万
本、Nb−Ti芯線平均径:0.5μｍ）多芯超電導線材を作製
した。Example In a pipe made of a 10% Ni-Cu alloy having an outer diameter of 50 mm and an inner diameter of 40 mm, an outer diameter of 40 mm containing 0.5% by weight of Ni as a ferromagnetic material.
Was inserted into a superconducting core wire made of an Nb-Ti alloy, and was processed into a hexagonal cross-section while reducing the surface area. Next, a large number of the bundles were bundled, inserted into a pipe made of a similar 10% Ni-Cu alloy, and subjected to wire drawing. Then, these steps are repeated, and Ni is contained in a 10% Ni-Cu matrix having an outer diameter of 0.9 mm.
A multi-core superconducting wire having a large number of Nb-Ti core wires embedded therein (the number of Nb-Ti core wires: tens of thousands, the average diameter of Nb-Ti core wires: 0.5 μm) was produced.
このようにして得た多芯超電導線材の臨界温度・Tcを
測定したところ8.6Kと、Nb−Ti合金の臨界温度9.3Kより
低下していることを確認した。When the critical temperature / Tc of the multifilamentary superconducting wire thus obtained was measured, it was confirmed that it was 8.6K, which was lower than the critical temperature of the Nb-Ti alloy, 9.3K.
ここで、上述した超電導線材の製造工程において、Nb
−Ti芯線径を変化させることによって、超電導線材中に
おけるNiの相対的な含有量を変化させた多芯超電導線材
を複数作製し、これらの臨界温度・Tcをそれぞれ測定し
た。その結果を第１図に示す。Here, in the above-described manufacturing process of the superconducting wire, Nb
A plurality of multifilamentary superconducting wires in which the relative content of Ni in the superconducting wire was changed by changing the diameter of the Ti core wire were prepared, and their critical temperatures and Tc were measured. The result is shown in FIG.
同図から明らかなように、Niの含有量すなわち強磁性
体の含有量が増大することによって臨界温度・Tcがより
低下し、Niの含有量を0.2重量％以上とすることが臨界
温度の低下に有効であることが分る。As is evident from the figure, the critical temperature / Tc is further reduced by increasing the Ni content, that is, the ferromagnetic material content, and the critical temperature is reduced by increasing the Ni content to 0.2% by weight or more. Is effective.
次に、上記多芯超電導線材を巻枠に無誘導巻きし、超
電導コイルを作製した。Next, the multifilamentary superconducting wire was wound non-inductively around a bobbin to produce a superconducting coil.
このようにして得た超電導コイルを用いて交流運転
（50Hz）し、クエンチ試験を行った。第２図に上記超電
導コイルのクエンチ時の電流、電圧および抵抗値の時間
変化を示す。Using the superconducting coil thus obtained, an AC operation (50 Hz) was performed to perform a quench test. FIG. 2 shows a time change of a current, a voltage and a resistance value when the superconducting coil is quenched.
第２図からも分るように、この実施例による超電導コ
イルは、1.5km/秒と極めて速いクエンチ伝幡速度でクエ
ンチし、またクエンチ時に焼損することもなかった。As can be seen from FIG. 2, the superconducting coil according to this example was quenched at an extremely high quench propagation speed of 1.5 km / sec, and did not burn out during the quench.
このように、この実施例の超電導コイルは、超電導線
材のNb−Ti芯線中に強磁性体としてNiを含有しているこ
とから、第１図からも明らかなように臨界温度が低下
し、これによってクエンチを極めて速い速度で伝幡させ
ることが可能となる。よって、大電流通電時などにおい
ても焼損が生じることを防止することが可能となる。ま
た、超電導線材のマトリックス材として、比抵抗が大き
い10％Ni−Cu合金（1.4×10-5Ω・cm）を用いているこ
とから結合損失も低減されており、交流での使用に適合
したものである。As described above, since the superconducting coil of this embodiment contains Ni as a ferromagnetic material in the Nb-Ti core wire of the superconducting wire, the critical temperature decreases as is clear from FIG. This allows the quench to propagate at an extremely fast rate. Accordingly, it is possible to prevent the occurrence of burnout even when a large current is applied. In addition, the use of a 10% Ni-Cu alloy (1.4 × 10 -5 Ω · cm) with a large specific resistance as the matrix material of the superconducting wire reduces the coupling loss, making it suitable for use in alternating current. Things.
比較例 上記実施例におけるNb−Ti芯線径を0.5μｍとするこ
とによってNi含有量を0.2重量％以下とした以外は同様
の多芯超電導線材を作製し、これを用いて同様に超電導
コイルを作製した。Comparative Example The same multi-core superconducting wire was produced except that the Ni content was 0.2% by weight or less by setting the Nb-Ti core wire diameter in the above example to 0.5 μm, and a superconducting coil was similarly produced using the same. did.
このようにして得た超電導コイルについても、上記実
施例と同様に交流運転（50Hz）下でクエンチ試験を行っ
たところ、クエンチ伝幡速度は11m/秒と極めて遅く、ま
たかなりの確率で焼損が発生した。The obtained superconducting coil was also subjected to a quench test under an alternating current operation (50 Hz) in the same manner as in the above example. As a result, the quench propagation speed was extremely low at 11 m / sec, and burning was very likely. Occurred.
次に、本発明の超電導コイルの一使用例として、交流
用限流器について説明する。Next, an AC current limiter will be described as an example of use of the superconducting coil of the present invention.
第３図は、本発明の一実施例の超電導コイルを用いた
交流用限流器およびそれを組み込んだ試験回路の等価図
である。FIG. 3 is an equivalent view of an AC current limiter using a superconducting coil according to one embodiment of the present invention and a test circuit incorporating the same.
同図において、１は交流用限流器であり、この交流用
限流器１は、互いに無誘導に巻き、かつ並列に接続した
限流コイル２とトリガコイル３とによって構成されてい
る。これら限流コイル２およびトリガコイル３ともに、
本発明の超電導コイルによって形成したものであり、前
述した実施例と同様に、10％Ni−Cuマトリックス内にNi
含有Nb−Ti芯線を多数埋設した多芯超電導線材で形成さ
れている。In FIG. 1, reference numeral 1 denotes an AC current limiter. The AC current limiter 1 includes a current limiting coil 2 and a trigger coil 3 which are wound in a non-inductive manner and connected in parallel. Both the current limiting coil 2 and the trigger coil 3
It is formed by the superconducting coil of the present invention, and contains Ni in a 10% Ni-Cu matrix in the same manner as in the above-described embodiment.
It is formed of a multi-core superconducting wire in which a number of Nb-Ti core wires are embedded.
ここで、トリガコイル３を構成する超電導線材は、交
流用限流器１にこれを作動させるべき電流iopが流れる
際に、トリガコイル３に流れる電流i2がその臨界電流と
なるように設定されている。Here, the superconducting wire constituting the trigger coil 3 is set such that the current i 2 flowing through the trigger coil 3 becomes the critical current when the current i op to operate the current limiter 1 flows through the AC current limiter 1. Have been.
上記交流用限流器１は、以下のように動作する。すな
わち、交流用限流器１は限流コイル２およびトリガコイ
ル３が超電導状態にあるかぎり、外部から見たインピー
ダンスは零となり、回路中には負荷４の抵抗に応じて電
流が流れる。そして、交流用限流器１に流れる電流がこ
れを作動させるべき電流iopを超えると、トリガコイル
３がクエンチし、限流コイル２の無誘導性が失われる。
したがって、限流コイル２のインダクタンスで決まるイ
ンピーダンスが瞬時に短絡回路中に現れ、短絡電流が限
流される。The AC current limiter 1 operates as follows. That is, as long as the current limiting coil 2 and the trigger coil 3 are in the superconducting state, the impedance of the AC current limiting device 1 becomes zero, and a current flows in the circuit according to the resistance of the load 4. When the current flowing through the AC current limiter 1 exceeds the current i op for activating the current limiter 1, the trigger coil 3 is quenched, and the non-inductivity of the current limiter coil 2 is lost.
Therefore, an impedance determined by the inductance of the current limiting coil 2 instantaneously appears in the short circuit, and the short circuit current is limited.
上記構成の交流用限流器１を第３図に示した回路中組
み込み、以下の方法にしたがって動作試験を行った。The AC current limiter 1 having the above configuration was incorporated in the circuit shown in FIG. 3, and an operation test was performed according to the following method.
まず、負荷４として10Ωの抵抗を回路中に入れ、これ
と並列にスイッチ５を接続しておく。そして、電源６か
ら電圧100Vの交流電力を供給し、回路中に負荷４に基づ
く10Aの電流を流す。First, a 10 Ω resistor is put in the circuit as the load 4, and the switch 5 is connected in parallel with this. Then, an AC power having a voltage of 100 V is supplied from the power supply 6 and a current of 10 A based on the load 4 flows through the circuit.
ここで、スイッチ５を投入して短絡電流を流し、その
際の交流用限流器１の動作状態を調べた。試験結果とし
て、トリガコイル３における電流の変化を第４図に示
す。Here, the switch 5 was turned on to cause a short-circuit current to flow, and the operating state of the AC current limiter 1 at that time was examined. FIG. 4 shows a change in current in the trigger coil 3 as a test result.
第４図から明らかなように、スイッチ５を投入しトリ
ガコイル３の電流が28A（設定臨界電流）に達した際
に、トリガコイル３にクエンチし、1m秒以下でトリガコ
イ４ル３の電流が1A以下に減衰していることが分る。そ
して、この時限流コイル２には、設定どうりの200Aの電
流が流れていることを確認した。As is apparent from FIG. 4, when the switch 5 is turned on and the current of the trigger coil 3 reaches 28 A (set critical current), the trigger coil 3 is quenched, and the current of the trigger coil 3 is reduced within 1 ms. It can be seen that it is attenuated below 1A. Then, it was confirmed that a current of 200 A was flowing through the time-limited coil 2 at the set value.
上記実施例の交流用限流器１の動作特性は、トリガコ
イル３はクエンチ伝幡速度が大きく関与する。つまり、
トリガコイル３を1m秒以下というような速さでクエンチ
させることより、瞬時に限流コイル２によるインピーダ
ンスを短絡回路中に出現させることが可能となる。そし
て、上記実施例の交流用限流器１においては、トリガコ
イル３として10％Ni−Cuマトリックス内にNi含有Nb−Ti
芯線を多数埋設した多芯超電導線材で構成した超電導コ
イルを用いていることから、クエンチ伝幡速度が極めて
大きく、よって瞬時に短絡電流を限流することが可能と
なる。Regarding the operation characteristics of the AC current limiter 1 of the above embodiment, the quenching propagation speed of the trigger coil 3 is greatly involved. That is,
By quenching the trigger coil 3 at a speed of 1 ms or less, the impedance of the current limiting coil 2 can instantaneously appear in the short circuit. In the AC current limiter 1 of the above embodiment, the Ni-containing Nb-Ti is used as the trigger coil 3 in a 10% Ni-Cu matrix.
Since a superconducting coil composed of a multifilamentary superconducting wire in which a large number of core wires are buried is used, the quench propagation speed is extremely high, and thus it is possible to instantaneously limit the short-circuit current.
なお、上記各実施例では強磁性体としてNiを含有する
Nb−Ti芯線をマトリックス中に多数埋設した超電導線材
を用いた例について説明したが、他の強磁性体たとえば
FeやCoなどを用いた際にも同様の効果が得られた。In each of the above embodiments, Ni is contained as a ferromagnetic material.
Although an example using a superconducting wire in which a large number of Nb-Ti core wires are embedded in a matrix has been described, other ferromagnetic materials such as
Similar effects were obtained when Fe or Co was used.
［発明の効果］ 以上説明したように本発明によれば、Nb−Ti超電導芯
線中に添加された強磁性体が超電導線材の臨界温度を低
下させ、これによってクエンチ伝幡速度を著しく向上さ
せることが可能となる。よって、高電気抵抗を有する金
属マトリックスによって結合損失を低減した上で、大電
流通電時などにおいても焼損などを防止することが可能
となる。[Effects of the Invention] As described above, according to the present invention, the ferromagnetic material added to the Nb-Ti superconducting core wire lowers the critical temperature of the superconducting wire, thereby significantly improving the quench propagation speed. Becomes possible. Therefore, after the coupling loss is reduced by the metal matrix having a high electric resistance, it is possible to prevent burning and the like even when a large current is applied.
また、超電導コイルにあっては、クエンチを極めて速
く伝幡させることが可能となることから、特性の向上が
図れる。Further, in the superconducting coil, the quench can be propagated very quickly, so that the characteristics can be improved.
第１図は本発明の実施例による超電導線材のNi含有量と
臨界温度との関係を示すグラフ、第２図は本発明の一実
施例による超電導コイルのクエンチ時の電流、電圧およ
び抵抗値の時間変化を示すグラフ、第３図は本発明の超
電導コイルを用いて構成した交流用限流器およびそれを
組み込んだ試験回路の等価図、第４図はそれを用いた試
験結果を示すグラフである。 １……交流用限流器、２……本発明の超電導コイルから
なる限流コイル、３……本発明の超電導コイルからなる
トリガコイル、４……抵抗、５……スイッチ、６……交
流電源。FIG. 1 is a graph showing the relationship between the Ni content of a superconducting wire according to an embodiment of the present invention and the critical temperature, and FIG. 2 is a graph showing the current, voltage and resistance of a superconducting coil according to an embodiment of the present invention during quench. FIG. 3 is a graph showing time change, FIG. 3 is an equivalent diagram of an AC current limiter constituted by using the superconducting coil of the present invention and a test circuit incorporating the same, and FIG. 4 is a graph showing test results using the same. is there. 1 AC current limiter 2 Current limiting coil composed of the superconducting coil of the present invention 3 Trigger coil composed of the superconducting coil of the present invention 4 Resistor 5 Switch 6 AC Power supply.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01B 12/00 - 13/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) H01B 12/00-13/00
Claims (2)
に、Nb−Ti合金からなる超電導芯線を埋設してなる超電
導線材において、 前記超電導芯線は１〜0.2重量％の範囲の強磁性体を含
有することを特徴とする超電導線材。1. A superconducting wire in which a superconducting core wire made of an Nb-Ti alloy is embedded in a metal matrix having a high electric resistance, wherein the superconducting core wire contains a ferromagnetic material in a range of 1 to 0.2% by weight. A superconducting wire material characterized by that:
ことを特徴とする超電導コイル。2. A superconducting coil formed by winding the superconducting wire according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31969889A JP3154711B2 (en) | 1989-12-08 | 1989-12-08 | Superconducting wire and superconducting coil using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31969889A JP3154711B2 (en) | 1989-12-08 | 1989-12-08 | Superconducting wire and superconducting coil using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03182013A JPH03182013A (en) | 1991-08-08 |
| JP3154711B2 true JP3154711B2 (en) | 2001-04-09 |
Family
ID=18113185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31969889A Expired - Fee Related JP3154711B2 (en) | 1989-12-08 | 1989-12-08 | Superconducting wire and superconducting coil using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3154711B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102600251B1 (en) | 2019-06-17 | 2023-11-08 | 가부시키가이샤 도와 덴키 세이사쿠쇼 | fishing light device |
-
1989
- 1989-12-08 JP JP31969889A patent/JP3154711B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102600251B1 (en) | 2019-06-17 | 2023-11-08 | 가부시키가이샤 도와 덴키 세이사쿠쇼 | fishing light device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03182013A (en) | 1991-08-08 |
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