JPH0581940A - Stabilizer for superconductor - Google Patents
Stabilizer for superconductorInfo
- Publication number
- JPH0581940A JPH0581940A JP3271986A JP27198691A JPH0581940A JP H0581940 A JPH0581940 A JP H0581940A JP 3271986 A JP3271986 A JP 3271986A JP 27198691 A JP27198691 A JP 27198691A JP H0581940 A JPH0581940 A JP H0581940A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- superconducting conductor
- stabilizing material
- coating
- loss
- 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.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、超電導導体の特性を安
定させる超電導導体用安定化材の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a stabilizing material for a superconducting conductor which stabilizes the characteristics of the superconducting conductor.
【０００２】[0002]
【従来の技術】Ｃｕ／Ｎｂ−Ｔｉ，Ｃｕ／Ｎｂ3 Ｓｎ等
の超電導導体を実際に使用する場合には、特性を安定さ
せるために所定の安定化材を被覆，一体化している。安
定化材としては、極低温下での電気抵抗，磁気抵抗効果
が低い高純度アルミニウムが使用される。ところで、高
純度アルミニウムは、Ｃｕ／Ｎｂ−Ｔｉ等の超電導導体
と変形抵抗の差が大きいため、安定化材として用いる場
合に通常の一体化複合減面加工によって超電導導体に形
成することが困難である。このため、従来は一成分押出
加工によってアルミニウムを超電導導体に直接被覆する
か、若しくは半田等で一体化していた。図５には、半田
付けによって超電導導体に一体化する場合の安定化材の
構造が示されている。この安定化材１０は、半田付け性
を向上させるために高純度アルミニウム１２の外周に銅
または銅合金の被覆層１４を形成している。2. Description of the Related Art When a superconducting conductor such as Cu / Nb-Ti or Cu / Nb 3 Sn is actually used, a predetermined stabilizing material is coated and integrated in order to stabilize the characteristics. As the stabilizing material, high-purity aluminum having a low electric resistance and a low magnetoresistive effect at extremely low temperatures is used. By the way, since high-purity aluminum has a large difference in deformation resistance from a superconducting conductor such as Cu / Nb-Ti, it is difficult to form high-purity aluminum into a superconducting conductor by an ordinary integrated composite surface-reducing process when used as a stabilizing material. is there. For this reason, conventionally, aluminum was directly coated on the superconducting conductor by one-component extrusion, or integrated with solder or the like. FIG. 5 shows the structure of the stabilizing material when it is integrated with the superconducting conductor by soldering. This stabilizing material 10 has a coating layer 14 of copper or copper alloy formed on the outer periphery of high-purity aluminum 12 in order to improve solderability.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ように銅又は銅合金を被覆層１４として用いた安定化材
１０は、交流損失が大きいという問題点があった。すな
わち、上記のような安定化材１０の交流損失は、磁化法
（最大磁界０．３Ｔ，５０Ｈｚ）によって測定したとこ
ろ６０００ｋｗ／ｍ3 であった。上記のような交流損失
は、特に、高速励磁される超電導マグネットにおいて弊
害が大きく、極低温（４．２Ｋ程度）で使用される超電
導マグネットの負荷が大幅に増大してしまう。この結
果、冷却用の液体ヘリウムの使用量やヘリウム冷凍機の
負荷が大きくなる。However, the stabilizing material 10 using copper or copper alloy as the coating layer 14 as described above has a problem that the AC loss is large. That is, the AC loss of the stabilizing material 10 as described above was 6000 kw / m 3 when measured by the magnetization method (maximum magnetic field 0.3 T, 50 Hz). The AC loss as described above is particularly harmful in a superconducting magnet that is excited at high speed, and the load of the superconducting magnet used at an extremely low temperature (about 4.2 K) is significantly increased. As a result, the amount of liquid helium used for cooling and the load on the helium refrigerator are increased.
【０００４】[0004]
【発明の目的】本発明はかかる点に鑑みて成されたもの
であり、交流損失の小さな超電導導体用安定化材を提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to provide a stabilizing material for a superconducting conductor having a small AC loss.
【０００５】[0005]
【課題を解決するための手段】本発明に係る超電導導体
用安定化材は、複数に分割された高純度アルミニウム
と、各高純度アルミニウムを個々に被覆するアルミニウ
ム合金層と、アルミニウム合金層に被覆された高純度ア
ルミニウム全体を被覆する銅又は銅合金の被覆層とを備
えている。A stabilizer for a superconducting conductor according to the present invention comprises a plurality of high-purity aluminums, an aluminum alloy layer for individually coating each high-purity aluminum, and an aluminum alloy layer for coating. And a coating layer of copper or a copper alloy that coats the entire high-purity aluminum.
【０００６】[0006]
【作用】上記のように、本発明に係る超電導導体用安定
化材は、複数に分割された各高純度アルミニウムをアル
ミニウム合金によって被覆し、更にこれら全体を銅又は
銅合金によって被覆することにより、高純度アルミニウ
ムを直接銅又は銅合金によって被覆した場合に比べ、例
えば、磁化法（最大磁界０．３Ｔ，５０Ｈｚ）による測
定の結果、交流損失が１／２以下に低減された。As described above, the stabilizing material for a superconducting conductor according to the present invention is obtained by coating each of the high-purity aluminum divided into a plurality with an aluminum alloy, and further coating the whole with copper or a copper alloy. For example, as a result of measurement by a magnetization method (maximum magnetic field 0.3 T, 50 Hz), AC loss was reduced to 1/2 or less as compared with the case of directly coating high-purity aluminum with copper or a copper alloy.
【０００７】[0007]
【実施例】以下、本発明の一実施例を添付図面を参照し
つつ詳細に説明する。図１には実施例に係る超電導導体
用安定化材の構造（製造過程）が示されている。超電導
導体用安定化材２０の製造に際しては、先ず、外径１
６．８ｍｍ，内径１５．０ｍｍのアルミニウム合金管
（ＪＩＳ規格 ５０５６材，Ａｌ−Ｍｇ−Ｍｎ−Ｃｒ）
２１に外径１４．６ｍｍの高純度アルミニウム（純度９
９．９９９％）２２を挿入し、１パス加工度約２０％の
引抜き加工により対辺距離６．６８ｍｍの六角形状に成
形する。そして、この六角材を７本、外径２２．６ｍ
ｍ，内径２１．０ｍｍの無酸素銅管２４に挿入し、これ
を１パス加工度約２０％の引抜き加工により外径１．０
ｍｍに成形する。アルミニウム合金管２１の素材として
は、アルミニウムに対してＣｒ，Ｃｕ，Ｍｎ，Ｓｉ，Ｍ
ｇ，Ｚｎ，Ｆｅのうち１種類以上を含有させる。この
際、高純度アルミニウム２２に変形抵抗が近くなるよう
に組成を設定する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the structure (manufacturing process) of a stabilizing material for a superconducting conductor according to an example. When manufacturing the stabilizing material 20 for a superconducting conductor, first, the outer diameter 1
Aluminum alloy tube with 6.8 mm and inner diameter of 15.0 mm (JIS standard 5056 material, Al-Mg-Mn-Cr)
21 is high-purity aluminum with an outer diameter of 14.6 mm (purity 9
9.999%) 22 is inserted, and a hexagonal shape with an opposite side distance of 6.68 mm is formed by drawing with a one-pass working degree of about 20%. And 7 pieces of this hexagonal material, outside diameter 22.6m
m, internal diameter 21.0 mm, inserted into an oxygen-free copper pipe 24, and the external diameter 1.0
Mold to mm. The material of the aluminum alloy tube 21 is Cr, Cu, Mn, Si, M with respect to aluminum.
At least one of g, Zn, and Fe is contained. At this time, the composition is set so that the deformation resistance becomes close to that of the high-purity aluminum 22.
【０００８】以上のように製造された超電導導体用安定
化材２０について、温度４．２Ｋ，磁束密度５Ｔという
条件で磁気抵抗を測定したところ、比抵抗は２．２×１
０-9であった。これに対し、同一径の高純度アルミニウ
ムの比抵抗は１．８×１０-9であり、大きな差は見られ
なかった。また、交流損失を磁化法（最大磁界０．３
Ｔ，５０Ｈｚ）によって測定したところ、約３０００ｋ
ｗ／ｍ3 であり、従来の約１／２まで低減された。When the magnetic resistance of the stabilizing material 20 for superconducting conductors manufactured as described above was measured under the conditions of a temperature of 4.2 K and a magnetic flux density of 5 T, the specific resistance was 2.2 × 1.
0 was -9. On the other hand, the specific resistance of high-purity aluminum having the same diameter was 1.8 × 10 −9 , and no large difference was observed. In addition, the AC loss is determined by the magnetization method (maximum magnetic field 0.3
T, 50Hz), measured about 3000k
w / m 3 , which was reduced to about 1/2 of the conventional value.
【０００９】なお、上記実施例においては、被覆材（２
４）として無酸素銅を用いているが、Ｃｕ−Ｎｉ合金等
の銅合金を用いても良く、このような銅合金を用いれば
更に交流損失が低減される。また、アルミニウム合金２
１と高純度アルミニウム２２による部材（六角形状）の
本数は７本に限定されず、３１本や８５本でも良く、分
割数が多い程交流損失が低減されるが、サイズ効果によ
って磁気抵抗が増加する恐れがあるため、慎重に設定さ
れる。In the above embodiment, the covering material (2
Although oxygen-free copper is used as 4), a copper alloy such as a Cu-Ni alloy may be used, and if such a copper alloy is used, AC loss is further reduced. Also, aluminum alloy 2
The number of members (hexagonal shape) made of 1 and high-purity aluminum 22 is not limited to 7 and may be 31 or 85. The larger the number of divisions, the lower the AC loss, but the magnetic effect increases due to the size effect. There is a fear that it will be set carefully.
【００１０】図２，図３及び図４には、本実施例に係る
超電導導体用安定化材２０を用いた超電導線材の断面構
造が示されている。なお、図２及び図３においては、説
明の便宜上、安定化材２０のみ斜線で示す。図２に示さ
れた超電導線材３０は、一般的な円形撚線構造であり、
安定化材２０と超電導導体３２とを撚り合わせている。
この場合、安定化材２０と超電導導体３２とを半田付け
しても良い。図３に示された超電導線材４０は、成型撚
線構造であり、安定化材２０と超電導導体３２とを交互
に撚り合わせている。この場合も、安定化材２０と超電
導導体３２とを半田付けしても良い。図４に示された超
電導線材５０は、門型安定化銅５２内に矩形断面の超電
導導体５４と安定化材５６（安定化材２０と内部構造同
一）を半田付けしたものである。2, FIG. 3 and FIG. 4 show the sectional structure of a superconducting wire using the stabilizer 20 for a superconducting conductor according to this embodiment. Note that, in FIGS. 2 and 3, only the stabilizing material 20 is hatched for convenience of description. The superconducting wire 30 shown in FIG. 2 has a general circular stranded wire structure,
The stabilizer 20 and the superconducting conductor 32 are twisted together.
In this case, the stabilizing material 20 and the superconducting conductor 32 may be soldered. The superconducting wire 40 shown in FIG. 3 has a molded stranded wire structure, in which the stabilizing material 20 and the superconducting conductor 32 are alternately twisted together. Also in this case, the stabilizing material 20 and the superconducting conductor 32 may be soldered. The superconducting wire 50 shown in FIG. 4 is formed by soldering a superconducting conductor 54 having a rectangular cross section and a stabilizing material 56 (having the same internal structure as the stabilizing material 20) in a gate-shaped stabilizing copper 52.
【００１１】[0011]
【発明の効果】以上説明したように、本発明に係る超電
導導体用安定化材は、複数に分割された各高純度アルミ
ニウムをアルミニウム合金によって被覆し、更にこれら
全体を銅又は銅合金によって被覆しているため、交流損
失が大幅に低減されるという効果がある。また、本発明
に係る安定化材を用いた超電導導体においては、当該導
体の使用時の冷却効率が向上するという利点がある。As described above, the stabilizing material for a superconducting conductor according to the present invention is obtained by coating a plurality of divided high purity aluminum with an aluminum alloy and further coating the whole with copper or a copper alloy. Therefore, there is an effect that the AC loss is significantly reduced. In addition, the superconducting conductor using the stabilizing material according to the present invention has an advantage that the cooling efficiency when the conductor is used is improved.
【図１】図１は、本発明の一実施例に係る超電導導体用
安定化材の構造を示す断面図である。FIG. 1 is a sectional view showing a structure of a stabilizing material for a superconducting conductor according to an embodiment of the present invention.
【図２】図２は、実施例に係る安定化材を用いた超電導
線の構成を示す断面図である。FIG. 2 is a cross-sectional view showing a configuration of a superconducting wire using a stabilizing material according to an example.
【図３】図３は、実施例に係る安定化材を用いた超電導
線の構成を示す断面図である。FIG. 3 is a cross-sectional view showing a configuration of a superconducting wire using a stabilizing material according to an example.
【図４】図４は、実施例に係る安定化材を用いた超電導
線の構成を示す断面図である。FIG. 4 is a cross-sectional view showing a configuration of a superconducting wire using a stabilizing material according to an example.
【図５】図５は、従来の超電導導体用安定化材の構造を
断面図である。FIG. 5 is a cross-sectional view of the structure of a conventional stabilizing material for a superconducting conductor.
２０，５６ 超電導導体用安定化材 ２１ アルミニウム合金 ２２ 高純度アルミニウム ２４ 被覆材としての無酸素銅管 ３０，４０，５０ 超電導線材 ３２，５４ 超電導導体 ５２ 安定化銅 20,56 Stabilizing material for superconducting conductor 21 Aluminum alloy 22 High-purity aluminum 24 Oxygen-free copper tube as coating 30,40,50 Superconducting wire 32,54 Superconducting conductor 52 Stabilized copper
Claims (2)
導導体用安定化材において、 複数に分割された高純度アルミニウムと、 前記各高純度アルミニウムを個々に被覆するアルミニウ
ム合金層と、 前記アルミニウム合金に被覆された前記高純度アルミニ
ウム層全体を被覆する銅又は銅合金の被覆層とを備えた
ことを特徴とする超電導導体用安定化材。1. A stabilizer for a superconducting conductor used integrally with a superconducting conductor, comprising: a plurality of high-purity aluminums; an aluminum alloy layer that individually coats each of the high-purity aluminums; and the aluminum alloy. A stabilizing material for a superconducting conductor, comprising: a copper or copper alloy coating layer that coats the entire high-purity aluminum layer coated on.
てＣｒ，Ｃｕ，Ｍｎ，Ｓｉ，Ｍｇ，Ｚｎ，Ｆｅの少なく
とも１元素を含有していることを特徴とする請求項１記
載の超電導導体用安定化材。2. The stabilization for a superconducting conductor according to claim 1, wherein the aluminum alloy contains at least one element of Cr, Cu, Mn, Si, Mg, Zn, and Fe as an alloy element. Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3271986A JP3036160B2 (en) | 1991-09-24 | 1991-09-24 | Stabilizer for superconducting conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3271986A JP3036160B2 (en) | 1991-09-24 | 1991-09-24 | Stabilizer for superconducting conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0581940A true JPH0581940A (en) | 1993-04-02 |
| JP3036160B2 JP3036160B2 (en) | 2000-04-24 |
Family
ID=17507559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3271986A Expired - Fee Related JP3036160B2 (en) | 1991-09-24 | 1991-09-24 | Stabilizer for superconducting conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3036160B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378284A (en) * | 2012-04-11 | 2013-10-30 | 布鲁克Eas有限公司 | Superconductor |
-
1991
- 1991-09-24 JP JP3271986A patent/JP3036160B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378284A (en) * | 2012-04-11 | 2013-10-30 | 布鲁克Eas有限公司 | Superconductor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3036160B2 (en) | 2000-04-24 |
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