JP4571063B2 - High temperature superconducting current lead basic characteristic test equipment - Google Patents
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Description
本発明は、高温超電導電流リード（ＨＴＳリード）基礎特性試験装置に係り、特に、ＨＴＳリードの電気的特性、熱的特性等の基礎特性を評価するための装置に関するものである。 The present invention relates to a high-temperature superconducting current lead (HTS lead) basic characteristic testing apparatus, and more particularly to an apparatus for evaluating basic characteristics such as electrical characteristics and thermal characteristics of an HTS lead.
ＨＴＳリードは低発熱かつ低熱侵入といった特長を有しており、常温から低温環境下へ電流を供給する際の、電流入出経路の一部として応用が進んでいる。
より具体的には、図８及び図９に示すように、ＨＴＳリードを組み込んだ磁場発生装置が提案されている（非特許文献１参照）。すなわち、図８に示すように、樹脂含浸により機械的強度を向上した高温超電導体を用いたＨＴＳリード１０１が超電導コイル１０２の接続部に配置されるようになっている。なお、１０３は冷凍機、１０４はタンク外槽、１０５は液体ヘリウム溜の熱シールド、１０６は液体ヘリウム溜、１０７はパワーリード、１０８は８０Ｋアンカー、１０９は超電導コイル１０２の熱シールド、１１０は超電導コイル１０２の外槽である。
The HTS lead has features such as low heat generation and low heat penetration, and its application is progressing as a part of the current input / output path when supplying current from room temperature to a low temperature environment.
More specifically, as shown in FIGS. 8 and 9, a magnetic field generator incorporating an HTS lead has been proposed (see Non-Patent Document 1). That is, as shown in FIG. 8, the HTS lead 101 using the high-temperature superconductor whose mechanical strength is improved by resin impregnation is arranged at the connection portion of the superconducting coil 102. In addition, 103 is a refrigerator, 104 is a tank outside the tank, 105 is a heat shield of a liquid helium reservoir, 106 is a liquid helium reservoir, 107 is a power lead, 108 is an 80K anchor, 109 is a heat shield of the superconducting coil 102, 110 is a superconductor This is an outer tank of the coil 102.
また、図９は樹脂含浸ＨＴＳリードの平面図を示しており、２００はＨＴＳリード、２０１は高温側端子、２０２は低温側端子、２０３は樹脂部分、２０４は高温超電導体を示している。
しかしながら、かかるＨＴＳリードは過酷な雰囲気下にあるため、そのＨＴＳリードの信頼性を確保するには、十分なＨＴＳリード基礎特性試験が必要である。
本発明は、上記状況に鑑みて、迅速、かつ的確にＨＴＳリードの基礎特性を試験できる高温超電導電流リード基礎特性試験装置を提供することを目的とする。
However, such HTS because lead is under severe atmosphere, to ensure the reliability of the HTS lead requires a sufficient H TS read basic properties test.
In view of the above situation, an object of the present invention is to provide a high-temperature superconducting current lead basic characteristic test apparatus that can quickly and accurately test the basic characteristic of an HTS lead.
本発明は、上記目的を達成するために、
〔１〕高温超電導電流リード基礎特性試験装置において、熱シールド本体と、この熱シールド本体に支持される永久磁石と、この永久磁石による磁場内に配置される高温超電導電流リード試験体と、この高温超電導電流リード試験体にリード接続部を介して印加する温度を設定する温度設定手段とを備え、前記高温超電導電流リード試験体に流れる電流と電圧の関係を測定することにより前記高温超電導電流リード試験体の通電電流特性を試験し、前記永久磁石による前記高温超電導電流リード試験体への磁場の印加により前記高温超電導電流リード試験体の磁場特性の試験を行い、前記高温超電導電流リード試験体温度を前記温度設定手段によって変化させて温度勾配を与えた場合の前記高温超電導電流リード試験体の通電特性の試験を行うことを特徴とする。
In order to achieve the above object, the present invention provides
[1] In a high-temperature superconducting current lead basic characteristic testing apparatus, a heat shield body, a permanent magnet supported by the heat shield body, a high-temperature superconducting current lead test body disposed in a magnetic field by the permanent magnet, and the high temperature and a temperature setting means for setting the temperature you applied via the lead connecting portion in the superconducting current lead specimen, the high-temperature superconducting current lead by measuring the relationship between current and voltage flowing in the high-temperature superconducting current lead specimen Conducting current characteristics of the test body, testing the magnetic field characteristics of the high temperature superconducting current lead test body by applying a magnetic field to the high temperature superconducting current lead test body by the permanent magnet, the high temperature superconducting current lead test body temperature When the temperature setting means is changed to give a temperature gradient, the energization characteristic test of the high-temperature superconducting current lead specimen is performed. It is characterized in.
〔２〕上記〔１〕記載の高温超電導電流リード基礎特性試験装置において、前記永久磁石を温度調節することにより、印加磁場の大きさを制御することを特徴とする。
〔３〕上記〔１〕記載の高温超電導電流リード基礎特性試験装置において、前記永久磁石による磁気回路を前記高温超電導電流リード試験体に対してローレンツ力の働く向きを考慮して構成することを特徴とする。
[2] The high-temperature superconducting current lead basic characteristic test apparatus according to [1], wherein the magnitude of the applied magnetic field is controlled by adjusting the temperature of the permanent magnet.
[3] The high-temperature superconducting current lead basic characteristic testing apparatus according to [1], wherein the permanent magnet magnetic circuit is configured in consideration of the direction in which Lorentz force acts on the high-temperature superconducting current lead test specimen. And
〔４〕上記〔１〕〜〔３〕の何れか一項記載の高温超電導電流リード基礎特性試験装置において、前記高温超電導電流リード試験体はリードアダプタを付設し、このリードアダプタの付け替えにより、各種の高温超電導電流リードの試験および前記高温超電導電流リード試験体の熱侵入量の試験を可能にすることを特徴とする。
〔５〕上記〔１〕〜〔４〕の何れか一項記載の高温超電導電流リード基礎特性試験装置において、前記高温超電導電流リード試験体に直列に通電用高温超電導電流リードを配置することを特徴とする。
In high-temperature superconducting current lead basic characteristic test apparatus according to one of [4] above [1] to [3], the high-temperature superconducting current lead specimen is attached to the lead adapter, the replacement of the lead adapter, various The high-temperature superconducting current lead can be tested and the amount of heat penetration of the high-temperature superconducting current lead specimen can be tested.
[5] The high-temperature superconducting current lead basic characteristic testing apparatus according to any one of [1] to [4], wherein a high-temperature superconducting current lead for energization is arranged in series with the high-temperature superconducting current lead test body. And
〔６〕上記〔１〕〜〔５〕の何れか一項記載の高温超電導電流リード基礎特性試験装置において、前記温度設定手段が前記高温超電導電流リードにリード接続部を介して印加する温度を調整可能なヒータ温度調整付き冷凍機であることを特徴とする。
〔７〕上記〔６〕記載の高温超電導電流リード基礎特性試験装置において、前記温度設定手段による温度設定範囲が２Ｋ〜１００Ｋであることを特徴とする。
In high-temperature superconducting current lead basic characteristic test apparatus according to one of (6) above (1) to (5), the temperature said temperature setting means you applied via the lead connecting portions to the high-temperature superconducting current lead It is a refrigerator with an adjustable heater temperature adjustment.
[7] The high-temperature superconducting current lead basic characteristic test apparatus according to [6], wherein a temperature setting range by the temperature setting means is 2K to 100K.
〔８〕上記〔６〕記載の高温超電導電流リード基礎特性試験装置において、Ｙ系高温超電導電流リードの温度が４Ｋ〜８０Ｋであることを特徴とする。
〔９〕上記〔６〕記載の高温超電導電流リード基礎特性試験装置において、前記冷凍機が前記高温超電導電流リード試験体の第１の接続リードの温度を設定する第１の冷凍機と、前記高温超電導電流リード試験体の第２の接続リードの温度を設定する第２の冷凍機とを具備することを特徴とする。
[8] The high-temperature superconducting current lead basic characteristic testing apparatus according to [6] above, wherein the temperature of the Y-based high-temperature superconducting current lead is 4K to 80K.
[9] The high-temperature superconducting current lead basic characteristic testing apparatus according to [6], wherein the refrigerator sets a temperature of a first connection lead of the high-temperature superconducting current lead test specimen, and the high temperature And a second refrigerator for setting the temperature of the second connection lead of the superconducting current lead test specimen.
〔１０〕上記〔９〕記載の高温超電導電流リード基礎特性試験装置において、前記第１の接続リードの温度が５０〜１００Ｋ、第２の接続リードの温度が２０Ｋ以下であることを特徴とする。
〔１１〕上記〔９〕又は〔１０〕の何れか一項記載の高温超電導電流リード基礎特性試験装置において、前記第１の接続リードと前記第２の接続リードは伝熱板に接続され温度を一定に保持することを特徴とする。
[10] The high-temperature superconducting current lead basic characteristic test apparatus according to [9], wherein the temperature of the first connection lead is 50 to 100K, and the temperature of the second connection lead is 20K or less.
[11] In the high-temperature superconducting current lead basic characteristic testing device according to any one of [9] or [10], the first connection lead and the second connection lead are connected to a heat transfer plate to adjust the temperature. It is characterized by being held constant.
〔１２〕上記〔１１〕記載の高温超電導電流リード基礎特性試験装置において、前記伝熱板を用いて熱流束計によって熱侵入量を測定することを特徴とする。
〔１３〕上記〔９〕又は〔１０〕の何れか一項記載の高温超電導電流リード基礎特性試験装置において、前記第１の接続リードと前記第２の接続リードにヒータを取り付けて高温超電導電流リードの温度調整を可能にすることを特徴とする。
[12] The high-temperature superconducting current lead basic characteristic test apparatus according to [11], wherein the heat penetration amount is measured by a heat flux meter using the heat transfer plate.
[13] [9] above, or the high-temperature superconducting current lead basic characteristic test apparatus according to one of [10], wherein the first connecting lead and the second high-temperature superconducting current lead is attached a heater connection lead It is possible to adjust the temperature.
〔１４〕上記〔１〕〜〔１３〕の何れか一項記載の高温超電導電流リード基礎特性試験装置において、前記リード接続部に電気絶縁性が高く熱伝導性が良い窒化アルミニウムを用いることを特徴とする。
〔１５〕上記〔１〕記載の高温超電導電流リード基礎特性試験装置において、前記永久磁石を熱アンカに固定することを特徴とする。
[14] The high-temperature superconducting current lead basic characteristic testing apparatus according to any one of [1] to [13], wherein the lead connection portion is made of aluminum nitride having high electrical insulation and good thermal conductivity. And
[15] The high-temperature superconducting current lead basic characteristic test apparatus according to [1], wherein the permanent magnet is fixed to a thermal anchor.
〔１６〕上記〔１〕〜〔１５〕の何れか一項記載の高温超電導電流リード基礎特性試験装置において、冷却ステージと磁石固定フレームを分離して支持できる吊り下げ構造を有することを特徴とする。 [16] In the high-temperature superconducting current lead basic characteristic test apparatus according to one of the above [1] to [15], characterized by having a suspended structure can be supported by separate cooling stage and a magnet fixed frame .
本発明によれば、迅速、かつ的確に高温超電導電流リード基礎特性試験を行うことができる。 According to the present invention, a high-temperature superconducting current lead basic characteristic test can be performed quickly and accurately.
本発明の高温超電導電流リード基礎特性試験装置は、熱シールド本体と、この熱シールド本体に支持される永久磁石と、この永久磁石による磁場内に配置される高温超電導電流リード試験体と、この高温超電導電流リード試験体にリード接続部を介して印加する温度を設定する温度設定手段とを備え、前記高温超電導電流リード試験体に流れる電流と電圧の関係を測定することにより前記高温超電導電流リード試験体の通電電流特性を試験し、前記永久磁石による前記高温超電導電流リード試験体への磁場の印加により前記高温超電導電流リード試験体の磁場特性の試験を行い、前記高温超電導電流リード試験体温度を前記温度設定手段によって変化させて温度勾配を与えた場合の前記高温超電導電流リード試験体の通電特性の試験を行う。 A high-temperature superconducting current lead basic characteristic testing apparatus according to the present invention includes a heat shield body, a permanent magnet supported by the heat shield body, a high-temperature superconducting current lead test body disposed in a magnetic field by the permanent magnet, and the high temperature and a temperature setting means for setting the temperature you applied via the lead connecting portion in the superconducting current lead specimen, the high-temperature superconducting current lead by measuring the relationship between current and voltage flowing in the high-temperature superconducting current lead specimen Conducting current characteristics of the test body, testing the magnetic field characteristics of the high temperature superconducting current lead test body by applying a magnetic field to the high temperature superconducting current lead test body by the permanent magnet, the high temperature superconducting current lead test body temperature Of the high temperature superconducting current lead test specimen when a temperature gradient is given by changing the temperature by the temperature setting means .
以下、本発明の実施の形態について詳細に説明する。
ＨＴＳリードは低発熱かつ低熱侵入といった特長を有しており、常温から低温環境下へ電流を供給する際の、電流入出経路の一部として応用が進んでおり、その特性試験の信頼度を高める必要がある。
図１は本発明の第１実施例を示すＨＴＳリード基礎特性試験装置（両端温度差あり）の模式図である。
Hereinafter, embodiments of the present invention will be described in detail.
HTS leads have the features of low heat generation and low heat penetration, and their application is progressing as part of the current input / output path when supplying current from room temperature to low temperature environment, increasing the reliability of the characteristic test There is a need.
Figure 1 is a schematic diagram of HTS leads basic characteristics test apparatus according to the first embodiment of the present invention (with both end temperature difference).
この図において、１は断熱容器、２はＨＴＳリード（試験体）、３は永久磁石、４は低温側電流リード、４Ａは低温側電流リード接続部、５は高温側電流リード、５Ａは高温側電流リード接続部、６は冷却用冷凍機、６Ａは冷却用冷凍機６のコールドヘッド、７はＨＴＳリード試験体２の低温側温度調整用ヒータ、８はＨＴＳリード試験体２の高温側温度調整用ヒータ、９は永久磁石温度調整用ヒータ、１０Ａは第１の常温電流端子、１０Ｂは第２の常温電流端子である。 In this figure, 1 is a heat insulating container, 2 is an HTS lead (test body), 3 is a permanent magnet, 4 is a low temperature side current lead, 4A is a low temperature side current lead connection part, 5 is a high temperature side current lead, and 5A is a high temperature side. current lead connecting portion, 6 is a cooling refrigerator, 6A cold head of the cooling refrigerator 6, 7 cold side temperature adjusting heaters of HTS leads specimen 2, 8 upper temperature adjustment of HTS leads specimen 2 A heater 9 for adjusting the temperature of the permanent magnet, 10A a first room temperature current terminal, and 10B a second room temperature current terminal.
このように、本発明のＨＴＳリード基礎特性試験装置は、断熱容器１と、この断熱容器１に支持される永久磁石３と、この永久磁石３による磁場内に配置されるＨＴＳリード試験体２と、このＨＴＳリード試験体２にリード接続部を介して印加される温度を設定する温度設定手段とを備えている。
ここで、低温側電流リード接続部４Ａの温度をＴSL、高温側電流リード接続部５Ａの温度をＴSHとすると、ＴSL≦ＴSHであり、例えば、４Ｋ＜ＴSL＜８０Ｋ、８０Ｋ＜ＴSH＜３００Ｋである。この温度は温度設定手段により任意に設定が可能である。
Thus, HTS read basic characteristics testing apparatus of the present invention, the heat insulating container 1, the permanent magnet 3 is supported by the heat insulating container 1, H TS read test is placed in a magnetic field by the permanent magnet 3 The body 2 and temperature setting means for setting the temperature applied to the HTS lead test body 2 via the lead connection portion are provided.
Here, assuming that the temperature of the low temperature side current lead connection portion 4A is T SL and the temperature of the high temperature side current lead connection portion 5A is T SH , T SL ≦ T SH , for example, 4K <T SL <80K, 80K < T SH <300K. This temperature can be arbitrarily set by the temperature setting means.
また、永久磁石の温度（ＴPM）の調整により磁場の強度を任意に設定することができる。
図２は本発明の第２実施例を示すＨＴＳリード基礎特性試験装置（両端温度差あり）の断面図、図３は図２のＡ−Ａ矢視図、図４は図２のＢ−Ｂ矢視図（試験体の配置部分の平面図）、図５はそのＨＴＳリード基礎特性試験装置の上面図である。
Further, the intensity of the magnetic field can be arbitrarily set by adjusting the temperature ( TPM ) of the permanent magnet.
Figure 2 is a sectional view of HTS leads basic characteristics test apparatus according to the second embodiment of the present invention (with both end temperature difference), FIG. 3 A-A arrow view of FIG. 2, FIG. 4 in FIG. 2 B -B arrow view (plan view of the arrangement portion of the specimen), FIG. 5 is a top view of the HTS lead basic characteristics test apparatus.
これらの図において、１１は熱シールド本体、１２はＨＴＳリード（試験体）、１２Ａは通電用ＨＴＳリード（保護リード付）、１３は永久磁石、１３Ａは磁石固定フレーム、１４は第１の低温側電流リード、１４Ａは第１の低温側電流リード接続部、１５は第２の低温側電流リード、１５Ａは第２の低温側電流リード接続部、１６は伝熱板、１７は第２の冷却用冷凍機、１８は第２の冷却用冷凍機１７のコールドヘッド、１９は常温側電流リード、２０は熱シールド冷却伝熱板、２１は熱シールド支持体、２２は取付フランジ、２３は第１の冷却用冷凍機、２４は第１の冷却用冷凍機２３のコールドヘッド、２３Ａは冷却ベース、２５は第１の常温電流端子、２６は第２の常温電流端子、２７は排気ポート、２８は計測ポート、２９は真空計である。 In these drawings, 11 is a heat shield body, 12 is an HTS lead (test body), 12A is an HTS lead for energization (with a protective lead) , 13 is a permanent magnet, 13A is a magnet fixing frame, and 14 is a first low temperature side. 14A is a first low temperature side current lead connection portion, 15 is a second low temperature side current lead connection, 15A is a second low temperature side current lead connection portion, 16 is a heat transfer plate, and 17 is a second cooling purpose. Refrigerator 18, cold head of second cooling refrigerator 17 , 19 normal temperature side current lead, 20 heat shield cooling heat transfer plate, 21 heat shield support, 22 mounting flange, 23 first A cooling refrigerator, 24 is a cold head of the first cooling refrigerator 23, 23A is a cooling base, 25 is a first room temperature current terminal, 26 is a second room temperature current terminal, 27 is an exhaust port, and 28 is a measurement. Port, 29 is true A total of.
ここで、本発明のＨＴＳリード基礎特性試験装置の主要性能としては、（１）最大通電電流が１，０００Ａ、（２）最大印加磁場が０．５Ｔ以上、（３）設定温度範囲は、ＨＴＳリードの高温側端子が５０〜１００Ｋ、ＨＴＳリードの低温側端子が２０Ｋ以下である。
また、本発明のＨＴＳリード基礎特性試験の内容は、超電導特性確認試験の場合、次の３条件を組み合わせ、超電導状態を満足する限界条件を確認する。
Here, the main performance of the HTS lead basic characteristic test apparatus of the present invention is as follows: (1) Maximum energization current is 1,000 A, (2) Maximum applied magnetic field is 0.5 T or more, and (3) Set temperature range is HTS. The high temperature side terminal of the lead is 50 to 100K, and the low temperature side terminal of the HTS lead is 20K or less.
Moreover, the content of the HTS lead basic characteristic test of the present invention is the superconducting characteristic confirmation test, and the following three conditions are combined to confirm the limit condition that satisfies the superconducting state.
（１）任意の電流条件（１，０００Ａ以下）
（２）任意の磁場条件（ゼロ磁場あるいは０．５Ｔ以上のある一定値のいずれか）
（３）任意の温度条件（両端の温度差あり又は均一温度条件）
また、熱侵入量測定試験においては、ＨＴＳリードそのものの熱侵入量を測定する。
本発明のＨＴＳリード基礎試験装置については以下の点に留意する必要がある。
(1) Arbitrary current conditions (1,000A or less)
(2) Arbitrary magnetic field conditions (either zero magnetic field or a fixed value of 0.5T or more)
(3) Arbitrary temperature conditions (with temperature difference at both ends or uniform temperature conditions)
In the heat penetration amount measurement test, the heat penetration amount of the HTS lead itself is measured.
Regarding the HTS lead basic test apparatus of the present invention, it is necessary to pay attention to the following points.
（１）電流リード及び回路
ローレンツ力の働く向きを考慮して磁気回路を構成する。また、リードアダプタの付け替えにより種々のＨＴＳリード（例：Ｙ系、Ｄｙ系、Ｇｄ系、Ｂｉ系他）の評価を可能にする。
図４に示すように、ＨＴＳリードを２本として、通電余裕が大小のものを組み合わせできるようにする（通電余裕の少ない方の限界性能評価を行う）。また、図４に示すように、保護リード（金属系）付きの通電用ＨＴＳリード１２Ａを取り付け、ＨＴＳリード試験体１２と分離する。さらに、バイパス回路（保護リード等）を設ける。なお、保護リード材料としては、例えば、ＳＵＳを用いる。常温側電流リード（液体窒素温度より高温側で使用する部分で銅合金あるいは真鍮製）１９を取替え可能にする。また、熱容量型の常温側電流リードとする。
(1) Current lead and circuit A magnetic circuit is configured in consideration of the direction in which Lorentz force works. In addition, it is possible to evaluate various HTS leads (for example, Y-type, Dy-type, Gd-type, Bi-type, etc.) by changing the lead adapter.
As shown in FIG. 4, two HTS leads are used so that the energization margins can be combined (the performance evaluation with the smaller energization margin is performed). Further, as shown in FIG. 4, a current-carrying HTS lead 12 </ b> A with a protective lead (metal) is attached and separated from the HTS lead test body 12. Further, a bypass circuit (protective lead or the like) is provided. For example, SUS is used as the protective lead material. The room temperature side current lead 19 (made of copper alloy or brass at the part used at a temperature higher than the liquid nitrogen temperature) 19 can be replaced. Also, a heat capacity room temperature side current lead is used.
また、常温側電流リード１９と、ＨＴＳ（液体窒素温度より低温側で使用する部分）電流リードの交換は可能であり、試験体に応じた常温側電流リードとＨＴＳリードの評価ができる。
さらに、非定常無冷却タイプの常温側電流リードの温度測定ができる。
（２）温度調節機構
限界温度（ＨＴＳリードの通電可能温度）の試験をする。限界温度測定を種々のタイプのＨＴＳリードに対して行うことができる。例えば、Ｙ系，Ｄｙ系電流リードは４Ｋ〜９０Ｋの間で使用する。冷凍機を用いて温度設定が容易にできる。
Further, the room temperature side current lead 19 and the HTS (part used at a temperature lower than the liquid nitrogen temperature) current lead can be exchanged, and the room temperature side current lead and the HTS lead can be evaluated according to the test body.
Furthermore, it is possible to measure the temperature of the unsteady uncooled type room temperature side current lead.
(2) Temperature control mechanism The limit temperature (temperature at which the HTS lead can be energized) is tested. Critical temperature measurements can be made on various types of HTS leads. For example, Y-system and Dy-system current leads are used between 4K and 90K. The temperature can be easily set using a refrigerator.
雰囲気ガス（例：ヘリウム、窒素等）による冷却も可能である。
磁場印加用永久磁石、リードの両端を独立に温度制御可能である。
冷凍機１台でＨＴＳリード低温端の温度を制御、高温端の温度は液体窒素等で補償することもできる。
冷凍機複数台で電流リードの両端温度や磁場印加用永久磁石を独立に温度制御することができる。
Cooling with atmospheric gas (eg, helium, nitrogen, etc.) is also possible.
Temperature control is possible independently for both ends of the permanent magnet for magnetic field application and the lead.
The temperature of the HTS lead cold end can be controlled by one refrigerator, and the temperature of the hot end can be compensated by liquid nitrogen or the like.
The temperature of both ends of the current lead and the permanent magnet for applying a magnetic field can be independently controlled by a plurality of refrigerators.
永久磁石の温度制御をヒータにより可能にする。
熱アンカ分離、熱シールド分離を行う。
リード接続部に窒化アルミニウムを用いて、伝熱と電気絶縁を同時に実現する。
（３）非一定常温度での試験装置
図２〜図５に示すように、冷凍機２台（第１の冷凍機２３と第２の冷凍機１７）により、ＨＴＳリードの両端の温度調整が可能である。温度差の評価のために保護リード有無のＨＴＳリード２本を配置する。また、永久磁石は、熱アンカに固定して配置する。
The temperature of the permanent magnet can be controlled by a heater.
Perform heat anchor separation and heat shield separation.
Using aluminum nitride for the lead connection, heat transfer and electrical insulation are realized simultaneously.
(3) Testing apparatus at non-stationary temperature As shown in FIGS. 2 to 5, the temperature adjustments at both ends of the HTS lead can be performed by two refrigerators (first refrigerator 23 and second refrigerator 17). Is possible. Two HTS leads with or without protective leads are arranged for evaluation of the temperature difference. Further, the permanent magnet is fixed to the thermal anchor.
（４）一定温度での試験装置
図６〜図７に示すように、ＨＴＳリードの温度を一定の状態に維持して測定する。つまり、伝熱板（アンカ板）によって温度を一定に保持して測定する。試料スペースを冷凍機に直付けして、温度差を小さくできる。試験台の熱容量を小さくして温度の均一性を高めることができる。リードにヒータを取り付けてＨＴＳリード温度調節を行う。
(4) Test apparatus at a constant temperature As shown in FIGS. 6 to 7, the temperature of the HTS lead is maintained in a constant state and measured. That is, the temperature is kept constant by the heat transfer plate (anchor plate) and measured. By directly attaching the sample space to the refrigerator, the temperature difference can be reduced. The heat capacity of the test bench can be reduced to increase temperature uniformity. A heater is attached to the lead to adjust the HTS lead temperature.
（５）熱侵入量測定装置
伝熱板と熱流束計を用いて熱侵入量を測定できる。さらに、アダプター付け替えによりＨＴＳリードの熱侵入量測定が可能である。
（６）支持機構
冷却ステージと磁石固定フレームを分離して支持できる吊り下げ構造とする。
(5) Heat penetration amount measuring device The heat penetration amount can be measured using a heat transfer plate and a heat flux meter. Furthermore, the heat penetration amount of the HTS lead can be measured by changing the adapter.
(6) Support mechanism A suspension structure that can support the cooling stage and the magnet fixing frame separately is adopted.
（７）永久磁石
第２実施例では、Ｎｄ−Ｆｅ−Ｂ等の高保持力の永久磁石１３を用いた磁気回路構造（サンプルホルダ付）とした。したがって、構造を簡便にすることができる。
さらに、永久磁石の温度を制御することにより、残留磁場の高い温度で永久磁石を使用する。
(7) Permanent magnet In the second embodiment, a magnetic circuit structure (with a sample holder) using a permanent magnet 13 having a high holding force such as Nd-Fe-B is used. Therefore, the structure can be simplified.
Furthermore, by controlling the temperature of the permanent magnet, the permanent magnet is used at a high temperature of the residual magnetic field.
そして、永久磁石１３を用いてＨＴＳリード１２に磁場を印加する。なお、鉄ヨークを用いて磁場を集中させてＨＴＳリード１２に磁場を印加することができる。その場合、ＦＲＰで熱絶縁するサンプルホルダ構成とする。永久磁石ヨーク以外に鉄を使用しない。また、サンプル位置を移動して磁場に変化を与えることができる。永久磁石の向きを変えてＨＴＳリードの耐磁場特性を把握することができる。ＨＴＳリードの支持では、歪み、撓みを防止する構成となっている。 Then, a magnetic field is applied to the HTS lead 12 using the permanent magnet 13. Note that a magnetic field can be applied to the HTS lead 12 by concentrating the magnetic field using an iron yoke. In that case, it is set as the sample holder structure thermally insulated by FRP. Use no iron other than the permanent magnet yoke. Further, the sample position can be moved to change the magnetic field. The magnetic field resistance characteristics of the HTS lead can be grasped by changing the direction of the permanent magnet. The support of the HTS lead is configured to prevent distortion and bending.
また、永久磁石として、ハルバッハ型磁石を用いることもできる。このハルバッハ型磁石は、コアギャップ内部には強力で平坦な磁場を発生し、外部への磁場漏れはコアから少し離した位置に鉄板をおいて遮蔽する〔第１４回加速器科学研究発表会予稿集，１ｐ−０２８（２００３）〕。かかるコアギャップ内部にＨＴＳリード試験体を配置して試験を行うようにしてもよい。 A Halbach magnet can also be used as the permanent magnet. This Halbach-type magnet generates a strong and flat magnetic field inside the core gap, and shields the magnetic field leakage to the outside by placing an iron plate at a position slightly away from the core. , 1p-028 (2003)]. The test may be performed by placing an HTS lead test body inside the core gap.
このような永久磁石を用いてＨＴＳリード１２に磁場を印加する。
次に、ＨＴＳリード（試験体）の試験に際しては、
（１）熱暴走監視システムを設ける。
（２）永久磁石表面にホール素子を付けて中心磁場を予測する。
（３）温度センサをＨＴＳリードの端子部に取り付ける。
A magnetic field is applied to the HTS lead 12 using such a permanent magnet.
Next, when testing the HTS lead (specimen),
(1) Establish a thermal runaway monitoring system.
(2) A Hall element is attached to the permanent magnet surface to predict the central magnetic field.
(3) A temperature sensor is attached to the terminal portion of the HTS lead.
（４）電圧、温度によるＨＴＳリードの劣化の検知を行う。
（５）ＨＴＳリードに電圧端子を設ける。
上記したように、第１及び第２実施例によれば、
（１）通電電流の試験は、電気抵抗がゼロ状態のままＨＴＳリード（試験体）１２に流れる電流と電圧の関係を測定することにより、ＨＴＳリード（試験体）１２の通電電流特性を試験することができる。
(4) HTS lead deterioration due to voltage and temperature is detected.
(5) A voltage terminal is provided on the HTS lead.
As mentioned above, according to the first and second embodiments,
(1) In the test of the energization current, the energization current characteristic of the HTS lead (test body) 12 is tested by measuring the relationship between the current flowing through the HTS lead (test body) 12 and the voltage while the electric resistance is zero. be able to.
（２）印加磁場の試験は、永久磁石１３によるＨＴＳリード（試験体）１２への磁場の印加により行う。
（３）温度の試験は、ＨＴＳリード（試験体）１２の高温側端子を５０Ｋ〜１００Ｋ、低温側端子を２０Ｋ以下へと種々設定することができる。つまり、第１の冷却用冷凍機２３と第２の冷却用冷凍機１７のそれぞれの冷凍条件を変化させることにより、一端は例えば８０Ｋ、他端は例えば４Ｋとすることにより、ＨＴＳリード（試験体）１２の温度勾配を与えた場合の通電特性の試験を行うことができる。
(2) The applied magnetic field is tested by applying a magnetic field to the HTS lead (test body) 12 by the permanent magnet 13.
(3) In the temperature test, the high-temperature side terminal of the HTS lead (test body) 12 can be variously set to 50K to 100K, and the low-temperature side terminal can be set to 20K or less. That is, by changing the refrigeration conditions of the first cooling refrigerator 23 and the second cooling refrigerator 17, one end is set to, for example, 80K, and the other end is set to, for example, 4K. ) It is possible to test the energization characteristics when a temperature gradient of 12 is given.
図６は本発明の第３実施例を示すＨＴＳリードの試験装置（両端温度一定）の断面図、図７は図６のＣ−Ｃ矢視図である。
これらの図において、３１は熱シールド本体、３２はＨＴＳリード（試験体）、３３は永久磁石、３３Ａは永久磁石固定フレーム、３４，３５は低温側電流リード、３７は冷却ベース、３８は高温側電流リード、３９は熱シールド冷却伝熱板、４０は熱シールド支持体、４１は取付フランジ、４２は冷却用冷凍機、４３は冷却用冷凍機４２のコールドヘッド、４４は第１の常温電流端子、４５は第２の常温電流端子である。
FIG. 6 is a cross-sectional view of an HTS lead test apparatus (constant temperature at both ends) showing a third embodiment of the present invention, and FIG. 7 is a view taken along the line CC in FIG.
In these drawings, 31 is a heat shield body, 32 is an HTS lead (test body), 33 is a permanent magnet, 33A is a permanent magnet fixing frame, 34 and 35 are low-temperature side current leads, 37 is a cooling base, and 38 is a high-temperature side. Current lead, 39 is a heat shield cooling heat transfer plate, 40 is a heat shield support, 41 is a mounting flange, 42 is a cooling refrigerator, 43 is a cold head of the cooling refrigerator, and 44 is a first room temperature current terminal. , 45 are second room temperature current terminals.
このように構成したので、
（１）通電電流の試験は、ＨＴＳリード（試験体）３２に流れる電流と電圧の関係を測定することにより、ＨＴＳリード（試験体）３２の通電電流特性を試験することができる。
（２）印加磁場の試験は、永久磁石３３によるＨＴＳリード（試験体）３２への磁場の印加により行う。
Because it was configured like this,
(1) In the test of the energization current, the energization current characteristic of the HTS lead (test body) 32 can be tested by measuring the relationship between the current flowing through the HTS lead (test body) 32 and the voltage.
(2) The applied magnetic field is tested by applying a magnetic field to the HTS lead (test body) 32 by the permanent magnet 33.
（３）温度の試験は、ＨＴＳリード（試験体）３２の設定温度範囲を、冷却用冷凍機４２の冷凍条件を変化させることにより、ＨＴＳリード（試験体）３２の印加温度を変化させて試験を行うことができる。
なお、本発明は上記実施例に限定されるものではなく、本発明の趣旨に基づき種々の変形が可能であり、これらを本発明の範囲から排除するものではない。
(3) The temperature test is performed by changing the application temperature of the HTS lead (test body) 32 by changing the refrigeration condition of the cooling refrigerator 42 in the set temperature range of the HTS lead (test body) 32. It can be performed.
In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.
本発明の高温超電導電流リード基礎特性試験装置は、磁気浮上式鉄道車両に搭載される超電導磁石装置に組み込まれる高温超電導電流リードの高信頼性の試験装置として利用可能である。 The high-temperature superconducting current lead basic characteristic testing apparatus of the present invention can be used as a highly reliable testing apparatus for a high- temperature superconducting current lead incorporated in a superconducting magnet device mounted on a magnetically levitated railway vehicle.
１ 断熱容器
１１，３１ 熱シールド本体
２，１２，３２ ＨＴＳ（高温超電導電流）リード（試験体）
３，１３，３３ 永久磁石
４，３４，３５ 低温側電流リード
４Ａ 低温側電流リード接続部
５，１９，３８ 高温側電流リード
５Ａ 高温側電流リード接続部
６，４２ 冷却用冷凍機
６Ａ，４３ 冷却用冷凍機のコールドヘッド
７ 試験体の低温側端子温度調整用ヒータ
８ 試験体の高温側端子温度調整用ヒータ
９ 永久磁石温度調整用ヒータ
１０Ａ，２５，４４ 第１の常温電流端子
１０Ｂ，２６，４５ 第２の常温電流端子
１２Ａ 通電用ＨＴＳリード（保護リード付）
１３Ａ，３３Ａ 磁石固定フレーム
１４ 第１の低温側電流リード
１４Ａ 第１の低温側電流リード接続部
１５ 第２の低温側電流リード
１５Ａ 第２の低温側電流リード接続部
１６ 伝熱板
１７ 第２の冷却用冷凍機
１８ 第２の冷却用冷凍機のコールドヘッド
２０，３９ 熱シールド冷却伝熱板
２１，４０ 熱シールド支持体
２２，４１ 取付フランジ
２３ 第１の冷却用冷凍機
２３Ａ，３７ 冷却ベース
２４ 第１の冷却用冷凍機のコールドヘッド
２７ 排気ポート
２８ 計測ポート
２９ 真空計
1 Insulated container 11, 31 Heat shield body 2, 12, 32 HTS (high temperature superconducting current) lead (test body)
3, 13, 33 Permanent magnet 4, 34, 35 Low temperature side current lead 4A Low temperature side current lead connection 5, 19, 38 High temperature side current lead 5A High temperature side current lead connection 6, 42 Cooling refrigerator 6A, 43 Cooling Cold head of refrigerator for refrigerator 7 Heater for adjusting low temperature side terminal temperature of test specimen 8 Heater for adjusting high temperature side terminal temperature of test specimen 9 Heater for adjusting permanent magnet temperature 10A, 25, 44 First room temperature current terminal 10B, 26, 45 Second room temperature current terminal 12A HTS lead for energization (with protective lead)
13A, 33A Magnet fixed frame 14 First low-temperature side current lead 14A First low-temperature side current lead connection 15 Second low-temperature side current lead 15A Second low-temperature side current lead connection 16 Heat transfer plate 17 Second Cooling refrigerator 18 Cold head of second cooling refrigerator 20, 39 Heat shield cooling heat transfer plate 21, 40 Heat shield support 22, 41 Mounting flange 23 First cooling refrigerator 23A, 37 Cooling base 24 Cold head of first cooling refrigerator 27 Exhaust port 28 Measurement port 29 Vacuum gauge
Claims (16)
（ｂ）該熱シールド本体に支持される永久磁石と、
（ｃ）該永久磁石による磁場内に配置される高温超電導電流リード試験体と、
（ｄ）該高温超電導電流リード試験体にリード接続部を介して印加する温度を設定する温度設定手段とを備え、
（ｅ）前記高温超電導電流リード試験体に流れる電流と電圧の関係を測定することにより前記高温超電導電流リード試験体の通電電流特性を試験し、前記永久磁石による前記高温超電導電流リード試験体への磁場の印加により前記高温超電導電流リード試験体の磁場特性の試験を行い、前記高温超電導電流リード試験体温度を前記温度設定手段によって変化させて温度勾配を与えた場合の前記高温超電導電流リード試験体の通電特性の試験を行うことを特徴とする高温超電導電流リード基礎特性試験装置。 (A) a heat shield body;
(B) a permanent magnet supported by the heat shield body;
(C) a high-temperature superconducting current lead specimen placed in the magnetic field of the permanent magnet;
(D) a temperature setting means for setting the temperature you applied via the lead connecting portions to the high temperature superconducting current lead specimen,
(E) The current-carrying current characteristics of the high-temperature superconducting current lead test specimen are tested by measuring the relationship between the current and voltage flowing through the high-temperature superconducting current lead test specimen, The high-temperature superconducting current lead test specimen when the magnetic field characteristics of the high-temperature superconducting current lead specimen is tested by applying a magnetic field, and the temperature setting means is used to change the temperature of the high-temperature superconducting current lead specimen. A high-temperature superconducting current lead basic characteristic testing device characterized by conducting a test of the current-carrying characteristics .
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| JPH06249902A (en) * | 1993-02-23 | 1994-09-09 | Sumitomo Heavy Ind Ltd | Superconducting-critical-current measuring apparatus |
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