US3657466A - Superconductors - Google Patents

Superconductors Download PDF

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Publication number
US3657466A
US3657466A US45501A US3657466DA US3657466A US 3657466 A US3657466 A US 3657466A US 45501 A US45501 A US 45501A US 3657466D A US3657466D A US 3657466DA US 3657466 A US3657466 A US 3657466A
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Prior art keywords
superconductor
assembly
critical temperature
composite
superconductive
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Expired - Lifetime
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US45501A
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English (en)
Inventor
Alan Woolcock
Anthony Clifford Barber
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Imperial Metal Industries Kynoch Ltd
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Imperial Metal Industries Kynoch Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
    • H01B12/16—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
    • H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
    • H01B12/12—Hollow conductors
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/884—Conductor
    • Y10S505/887—Conductor structure
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49014—Superconductor

Definitions

  • ABSTRACT A superconductor assembly comprising at least one superconductor composite of at least one element of a superconductor material which is superconductive below a critical temperature embedded in a matrix of at least one material which is not superconductive at said critical temperature, assembled to at least one component consisting of one or more materials which are not superconductive at said critical temperature to provide a tubular assembly having at least one passage for fluid coolant.
  • This invention relates to superconductors and to methods of manufacture thereof.
  • the invention is specifically concerned with a superconductor assembly wherein there is provided a
  • a superconductor assembly in which at least one element of a superconductor material which is superconductive below a critical temperature, is embedded in a matrix forming the wall of the assembly, the matrix preferably being of a thermally and electrically conductive material, such that the flow of liquid helium through the hollow interior of the assembly will serve to maintain the temperature of the superconductor material below its critical temperature.
  • a superconductor assembly comprises at least one superconductor composite comprising at least one element of a superconductor material which is superconductive below a critical temperature, embedded in a matrix of at least one material which is not superconductive at said critical temperature, said composite being assembled to at least one component consisting of one or more materials which are not superconductive at said critical temperature to provide a tubular assembly having at least one passage for fluid coolant to maintain said superconductor material at a temperature below its critical temperature.
  • said composite is enclosed within said at least one component to provide at least two passages for fluid coolant.
  • said composite is assembled to said at least one component by being positively securedthereto, for example by welding or soldering, but if said composite is totally enclosed by said at least one component, the assembly together thereof may either be by being positively secured thereto or said composite may merely be lodged in position.
  • the superconductor assembly preferably it is either secured to itself or to at least one composite to define said passage for fluid coolant, or altematively the component is of integral tubular shape.
  • said superconductor material is a superconductor alloy of niobium and titanium, for example niobium 44 weight percent titanium.
  • the matrix material may be a copper-base alloy having a higher electrical resistivity than that of commercially pure copper, for example a cupro-nickel alloy.
  • the cupro-nickel alloy either extends through the whole, and constitutes, the matrix material, or it is located as an uninterrupted layer around said element of a superconductor material, the remainder of the matrix being composed of some other material which is not superconductive below said critical temperature.
  • FIG. 1 is a cross-sectional view of a first example of the invention
  • FIG. 2 is a cross-sectional view of a modification of the first example
  • FIG. 3 is a cross-sectional view of a further modification of the first example
  • FIG. 4 is a cross-sectional view of a second example of the invention.
  • FIG. 5 is a cross-sectional view of a third example of the invention.
  • FIG. 6 is a cross-sectional view of a fourth example of the invention.
  • FIG. 7 is a cross-sectional view of a further modification of the first example.
  • FIG. 8 is a perspective view of a fifth example of the inventIOII.
  • FIG. 1 shows a tubular superconductor assembly 10 made from a superconductor composite strip 11 which is assembled to two U-shaped nonsuperconductor components 12.
  • the superconductor composite strip 11 comprises a large number of filaments 13 of the superconductor alloy niobium 44 weight percent titanium which has a critical temperature in zero magnetic field of about 92 K, which are embedded within a matrix of high-conductivity copper 14. Copper has no superconductive properties at 92 K or 4.2 K.
  • the strip 11 is manufactured by any convenient process, for example by the provision of a plurality of superconductor rods in corresponding apertures in a copper billet to produce an assembly, the assembly being extruded and drawn and finally flattened to produce the configuration illustrated in FIG. 1.
  • a further example of a convenient process for manufacturing the strip 11 is by rolling face to face a number of copper or other ductile non-superconductor strips with one or more superconductor wires interposed between each two adjacent strips.
  • Each non-superconductor component 12 is of high-conductivity copper only, and comprises two parallel sides 15 which are secured together by a base 16, the interior of the center of the base 16 being recessed to provide a groove 17 of a suitable dimension for receiving the corresponding edge of the superconductor composite strip 11.
  • Each component 12 may be manufactured as a flat strip into which is rolled the groove 17, followed by the bending upwardly of each of the sides 15. In this way large lengths of each component 12 can be manufacturedv by the securing together of ends of adjacent copper strips, followed by the bending operation, and the bending operation has a particular virtue in that this will provide a certain amount of work-hardening of the copper in the vicinities of the resulting comers.
  • FIG. 1 The assembly of FIG. 1 is produced by the location of the two components 12 face to face and sandwiching the com posite superconductor strip 11 with its edges in the corresponding grooves 17, whereupon the facing ends of the sides 15 are welded together in any suitable fashion. To obtain an adequate weld with the minimum generation of heat, it is preferred that electron beam welding be used.
  • the components 12 can be manufactured in almost indefinite lengths, and this also applies to the composite superconductor strip 11, because this always exists as a strip and it is therefore relatively easy for the ends of successive strips to be secured together with minimum electrical resistance, for example by overlapping adjacent ends, explosively welding them together, and removing excess material to leave the joint with the same cross-section as that of the remainder of the strips.
  • the tubular superconductor assembly of FIG. 1 is usually wound as the turns of an electro-magnet, and it is then used at a temperature below the critical temperature of the superconductor material. This is achieved initially, and is maintained, by the pumping of liquid helium at about 4.2 K or pressurized supercritical helium at just over 4.2 K through the two passages 18,19 formed one to each side of the strip 11, and within the two components 12. Confinement of the helium in this way ensures maximum contact thereof with the faces of the strip 11, and enables pressurization to be used.
  • the rapid and uniform circulation which can be achieved will serve to remove rapidly any bubbles of gaseous helium formed in liquid helium, or any helium which has absorbed heat, as quickly as possible from the vicinity concerned.
  • the components 12 provide extra strength for the strip 11, and this is supplemented by the work-hardening of the corners which has been mentioned above. Still further, as well as the high-conductivity copper of the strip 11 having the function of heat removal and acting as a heat sink for any heat generated in the superconductor filaments 13, this will be aided by the high-conductivity copper of the components 12.
  • the edges of the strip 11 are merely lodged in the corresponding grooves 17 provided in the components 12.
  • the tubular assembly may be strengthened, and the thermal and electrical contact between the strip 11 and the components 12 may be enhanced, by the welding of the edges of the strip 11 into the groove 17. This is preferably accomplished by use of the electron beam welder along the mid line of the base 16 to each of the components 12.
  • the two components 12 may be integral with each other across one of the welds illustrated in FIG. 1, there then being a single component which is bent into a box shape, in so doing receiving the strip 11, and there is then only a single weld required to close the assembly.
  • FIG. 3 shows a further modification of the example of FIG. 1 in which the strip 11 is extended through the entire thickness of the components 12 of FIG. 1, in which case welding is effected between the free end of each arm of two U-shaped components 30, with the facing surface of the central strip 11.
  • FIG. 4 shows a second example of the invention in which a single strip of high-conductivity copper is bent into a rectangular box shape 31, and is welded into this position as shown at 32.
  • a superconductor composite strip 33 which is lodged diagonally across the interior of the rectangular box shape. If required, the strip 33 may be secured in position by electron beam welding after the rectangular box shape has been achieved.
  • the strip 32 separates two coolant passages 34,35.
  • FIG. 5 of the drawings illustrates a third example of the invention in which a tubular superconductor assembly is produced by the welding together of a single U-shaped cornponent 44 of a material which is not superconductive at the critical temperature of the superconductor material, for example high-conductivity copper or aluminum, with one side of a composite superconductor strip 45 which is of the same general construction as the strip 11 of FIG. 1.
  • a composite superconductor strip 45 which is of the same general construction as the strip 11 of FIG. 1.
  • the tubular assembly of FIG. 5 contains a single coolant passage 46.
  • more than one side of the tubular assembly may be constituted by a composite superconductor strip, for example the side opposite to that of the strip 45 illustrated in FIG. 5, can be constituted by a further such strip.
  • two composite superconductor strips 45 are located parallel to but spaced from each other, and they are bridged by two copper strips which thereby define a rectangular tube containing the coolant passage 46.
  • FIG. 6 illustrates a fourth example of the invention, in which there is provided a composite superconductor strip 47 which is secured onto one side of a rectangular copper tube 48. Securing is typically effected by soldering, as illustrated at 49.
  • the component of non-superconductor material already exists in tubular form, with a single coolant passage 50, prior to being provided with its composite superconductor strip.
  • more than one side of the copper tube 48 can be provided with a composite superconductor strip.
  • the superconductor filaments can exist in any number, or there can be only one filament.
  • the superconductor filament will usually take the form of a strip located within the matrix of the non-superconductor material. This is illustrated in FIG. 7 with the superconductor 51 in the matrix 14.
  • the sizes of the superconductor filaments can be varied as required, and in particular they can be decreased to less than 0.005 cm in order to provide inherent stability against flux jumps, and they can be twisted and transposed one over another in order to minimize flux linkage between the filaments.
  • the matrix material is still preferably high conductivity copper, but alternatively there can be used a matrix material which has a lower electrical conductivity than that of high-conductivity copper, so that suitable copper alloys such as cupro-nickel can then be used alone as the matrix material or as a layer around each superconductor filament in a matrix of copper, or as a layer between two rings of filaments.
  • high-conductivity copper can be replaced by aluminum or other highly conductive metals such as indium or silver.
  • the tensile strength of the tubular superconductor assembly can be increased by the incorporation within each non-superconductor component of a number of strengthening filaments, for example of stainless steel or a strong titanium alloy.
  • a number of strengthening filaments for example of stainless steel or a strong titanium alloy.
  • one or more of the external surfaces of the tubular superconductor assembly can be secured to a tape of a stronger material, for example stainless steel.
  • FIG. 8 of the drawings illustrates the fifth example of the invention which comprises a tube 60 of non-superconductor material, for example high-conductivity copper, workhardened copper, aluminum or stainless steel, around which are wound and soldered typically 24 wires 61.
  • Each wire 61 which can be of rectangular or circular cross-section, will normally be a composite of a plurality of superconductor filaments 62 embedded in a matrix 63 of non-superconductor material, for example high-conductivity copper or cupronickel, but some of the wires 61 can be of high-conductivity copper only, to provide electrical shunting capacity and thermal absorption and conductivity, and further wires 61 can be of strengthening material, for example stainless steel.
  • each composite wire 61 can be of less than 0.005 cm diameter and twisted to such a degree as to provide intrinsic stability in each wire 61, the transposition of each wire 61 around the tube 60 giving good overall stability. More then one layer of wires 61 can be provided.
  • the tube 60 can be of square (as shown) or other cross-sectional shape.
  • a superconductor assembly comprising at least one superconductor composite in the form of an elongated strip comprising a plurality of elements of a superconductor material which is superconductive below a critical temperature, extending longitudinally within said strip and embedded in and in electrical and thermal contact with a matrix of at least one material which is electrically and thermally conductive and is not superconductive at said critical temperature, said composite being assembled to two channel-shaped components consisting of one or more materials which are not superconductive at said critical temperature and which have high electrical and thermal conductivity, said components being joined edge-to-edge in surrounding relationship to said composite to provide a tubular assembly having at least two passages for fluid coolant to maintain said superconductor material at a temperature below its critical temperature.
  • a superconductor assembly comprising at least one superconductor composite in the form-of an elongated strip comprising a plurality of elements of a superconductor material which is superconductive below a critical temperature, extending longitudinally within said strip and embedded in and in electrical and thermal contact with a matrix of at least one material which is electrically and thermally conductive and is not superconductive at said critical temperature, said composite being assembled to at least one component consisting of one or more materials which are not superconductive at said critical temperature and which have high electrical and thermal conductivity to provide a tubular assembly having at least one passage for fluid coolant to maintain said superconductor material at a temperature below its critical temperature, said component being bent to form a rectangular tube and said composite being disposed diagonally across and in contact with the bore of the tube.
  • a superconductor assembly of the type including at least one superconductor composite comprising at least one element of a superconductor material, which is superconductive below a critical temperature, embedded in and in electrical and thermal contact with a matrix of at least one material which is electrically and thermally conductive and is not superconductive at said critical temperature, the said composite being assembled with at least one tubular component consisting of at least one material which is not superconductive at said critical temperature and which has a high electrical and thermal conductivity to provide a tubular assembly having at least one passage for fluid coolant to maintain said superconductor material at a temperature below its critical temperature, wherein the improvement comprises the at least one composite being in the form of a wire helically wound around and in contact with the tubular component.
  • each of said at least one composites incorporates a plurality of elements of a superconductor material.

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  • Superconductors And Manufacturing Methods Therefor (AREA)
US45501A 1969-06-19 1970-06-11 Superconductors Expired - Lifetime US3657466A (en)

Applications Claiming Priority (1)

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GB31083/69A GB1261597A (en) 1969-06-19 1969-06-19 Improvements in or relating to superconductors

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US (1) US3657466A (enrdf_load_stackoverflow)
AT (1) AT315271B (enrdf_load_stackoverflow)
BE (1) BE752294A (enrdf_load_stackoverflow)
DE (1) DE2029076A1 (enrdf_load_stackoverflow)
FR (1) FR2046910B1 (enrdf_load_stackoverflow)
GB (1) GB1261597A (enrdf_load_stackoverflow)
NL (1) NL7008702A (enrdf_load_stackoverflow)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737989A (en) * 1970-06-08 1973-06-12 Oerlikon Maschf Method of manufacturing composite superconductor
US3742116A (en) * 1971-06-23 1973-06-26 Comp Generale Electricite Transposed electric cable and method of producing the same
US3775840A (en) * 1971-08-19 1973-12-04 Siemens Ag Method of producing a composite conductor band for use in making a tubular superconductor
US3777368A (en) * 1971-08-19 1973-12-11 Siemens Ag Method of producing a composite tubular superconductor
US3783503A (en) * 1971-11-02 1974-01-08 Siemens Ag Method of producing a composite conductor band for use in making a tubular superconductor
US3829964A (en) * 1972-09-06 1974-08-20 Airco Inc Multi-filament composite superconductor with transposition of filaments and method of making same
US3835242A (en) * 1972-09-06 1974-09-10 P Critchlow Multi-filament composite superconductor with transposition of filaments
US3900702A (en) * 1972-11-30 1975-08-19 Siemens Ag Ribbon-shaped conductor arrangement for superconductors which permits ease of cooling
US4254299A (en) * 1976-08-31 1981-03-03 Bbc Brown, Boveri & Company, Limited Electrical superconductor
US4327244A (en) * 1979-02-09 1982-04-27 Bbc Brown, Boveri & Company, Limited Superconductive cable
US4336420A (en) * 1979-06-05 1982-06-22 Bbc, Brown, Boveri & Company, Limited Superconducting cable
US4549156A (en) * 1981-10-08 1985-10-22 Tokyo Shibaura Denki Kabushiki Kaisha Superconducting magnet
US4611390A (en) * 1975-12-03 1986-09-16 The Furukawa Electric Co., Ltd. Method of manufacturing superconducting compound stranded cable
US4912446A (en) * 1987-06-29 1990-03-27 Westinghouse Electric Corp. High energy density hyperconducting inductor
US4980972A (en) * 1987-06-29 1991-01-01 Westinghouse Electric Corp. Method of making a conductor for a high energy density hyperconducting inductor
US5114908A (en) * 1989-08-09 1992-05-19 Sumitomo Electric Industries, Ltd. Superconductive conductor
US5171941A (en) * 1990-03-30 1992-12-15 The Furukawa Electric Co., Ltd. Superconducting strand for alternating current
US5248656A (en) * 1987-04-06 1993-09-28 Hewlett-Packard Company Method of making superconductor wires, or capillaries
US5276281A (en) * 1990-04-13 1994-01-04 Sumitomo Electric Industries, Ltd. Superconducting conductor
US5477007A (en) * 1991-04-05 1995-12-19 Asta Elektrodraht Gmbh Twisted conductor
US5557072A (en) * 1991-03-28 1996-09-17 Gec Alsthom Sa Superconductive conductor presenting improved protection against partial transitions
US6247225B1 (en) * 1995-11-07 2001-06-19 American Superconductor Corporation Method for making cabled conductors containing anisotropic superconducting compounds
US20040200419A1 (en) * 2003-04-11 2004-10-14 Justin Mauck Explosion welded design for cooling components
US20210057135A1 (en) * 2019-08-22 2021-02-25 Hyeongrak CHOI Apparatuses and methods for increasing magnetic flux density using superconductors

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH592946A5 (enrdf_load_stackoverflow) * 1975-12-15 1977-11-15 Bbc Brown Boveri & Cie
CH604332A5 (enrdf_load_stackoverflow) * 1975-12-15 1978-09-15 Bbc Brown Boveri & Cie
DE2723744C3 (de) * 1977-05-26 1982-02-04 Vacuumschmelze Gmbh, 6450 Hanau Volltransponierter bandförmiger Leiter
JPS59208704A (ja) * 1983-05-12 1984-11-27 Toshiba Corp 化合物超電導コイル
EP0133220A3 (de) * 1983-07-22 1986-02-12 Kabel- und Lackdrahtfabriken GmbH Elektrischer Leiter
JPS60182612A (ja) * 1984-02-29 1985-09-18 三菱電機株式会社 超電導体

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GB284774A (en) * 1926-11-03 1928-02-03 Neville Ryland Davis Improvements in or relating to fluid cooled conductors for alternating electric currents
US2440668A (en) * 1943-08-18 1948-04-27 Budd Co Cable construction
DE887012C (de) * 1942-07-18 1953-08-20 Daimler Benz Ag Laufrad fuer Strassen- oder Schienenfahrzeuge
US3427391A (en) * 1967-09-20 1969-02-11 Avco Corp Composite superconductive conductor
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US3502789A (en) * 1966-12-02 1970-03-24 Imp Metal Ind Kynoch Ltd Superconductor cable
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Publication number Priority date Publication date Assignee Title
GB284774A (en) * 1926-11-03 1928-02-03 Neville Ryland Davis Improvements in or relating to fluid cooled conductors for alternating electric currents
DE887012C (de) * 1942-07-18 1953-08-20 Daimler Benz Ag Laufrad fuer Strassen- oder Schienenfahrzeuge
US2440668A (en) * 1943-08-18 1948-04-27 Budd Co Cable construction
US3472944A (en) * 1966-05-20 1969-10-14 Imp Metal Ind Kynoch Ltd Assemblies of superconductor elements
US3502789A (en) * 1966-12-02 1970-03-24 Imp Metal Ind Kynoch Ltd Superconductor cable
US3544706A (en) * 1966-12-28 1970-12-01 Comp Generale Electricite Electrical conductor configuration providing length stable with temperature
US3427391A (en) * 1967-09-20 1969-02-11 Avco Corp Composite superconductive conductor

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* Cited by examiner, † Cited by third party
Title
H. E. Cline, B. P. Strauss, R. M. Rose, & J. Wulff, Superconductivity of a Composite of Fine Niobium Wires in Copper, in JOurnal of Applied Physics, Vol. 37 No. 1 p. 5 8, 1966 *

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737989A (en) * 1970-06-08 1973-06-12 Oerlikon Maschf Method of manufacturing composite superconductor
US3742116A (en) * 1971-06-23 1973-06-26 Comp Generale Electricite Transposed electric cable and method of producing the same
US3775840A (en) * 1971-08-19 1973-12-04 Siemens Ag Method of producing a composite conductor band for use in making a tubular superconductor
US3777368A (en) * 1971-08-19 1973-12-11 Siemens Ag Method of producing a composite tubular superconductor
US3783503A (en) * 1971-11-02 1974-01-08 Siemens Ag Method of producing a composite conductor band for use in making a tubular superconductor
US3835242A (en) * 1972-09-06 1974-09-10 P Critchlow Multi-filament composite superconductor with transposition of filaments
US3829964A (en) * 1972-09-06 1974-08-20 Airco Inc Multi-filament composite superconductor with transposition of filaments and method of making same
US3900702A (en) * 1972-11-30 1975-08-19 Siemens Ag Ribbon-shaped conductor arrangement for superconductors which permits ease of cooling
US4611390A (en) * 1975-12-03 1986-09-16 The Furukawa Electric Co., Ltd. Method of manufacturing superconducting compound stranded cable
US4254299A (en) * 1976-08-31 1981-03-03 Bbc Brown, Boveri & Company, Limited Electrical superconductor
US4327244A (en) * 1979-02-09 1982-04-27 Bbc Brown, Boveri & Company, Limited Superconductive cable
US4336420A (en) * 1979-06-05 1982-06-22 Bbc, Brown, Boveri & Company, Limited Superconducting cable
US4549156A (en) * 1981-10-08 1985-10-22 Tokyo Shibaura Denki Kabushiki Kaisha Superconducting magnet
US5248656A (en) * 1987-04-06 1993-09-28 Hewlett-Packard Company Method of making superconductor wires, or capillaries
US4980972A (en) * 1987-06-29 1991-01-01 Westinghouse Electric Corp. Method of making a conductor for a high energy density hyperconducting inductor
US4912446A (en) * 1987-06-29 1990-03-27 Westinghouse Electric Corp. High energy density hyperconducting inductor
US5114908A (en) * 1989-08-09 1992-05-19 Sumitomo Electric Industries, Ltd. Superconductive conductor
US5171941A (en) * 1990-03-30 1992-12-15 The Furukawa Electric Co., Ltd. Superconducting strand for alternating current
US5276281A (en) * 1990-04-13 1994-01-04 Sumitomo Electric Industries, Ltd. Superconducting conductor
US5557072A (en) * 1991-03-28 1996-09-17 Gec Alsthom Sa Superconductive conductor presenting improved protection against partial transitions
US5477007A (en) * 1991-04-05 1995-12-19 Asta Elektrodraht Gmbh Twisted conductor
US6247225B1 (en) * 1995-11-07 2001-06-19 American Superconductor Corporation Method for making cabled conductors containing anisotropic superconducting compounds
US20010027166A1 (en) * 1995-11-07 2001-10-04 American Superconductor Corporation Delaware Corporation Cabled conductors containing anisotropic superconducting compounds and method for making them
US6906265B2 (en) 1995-11-07 2005-06-14 American Superconductor Corporation Cabled conductors containing anisotropic superconducting compounds
US20040200419A1 (en) * 2003-04-11 2004-10-14 Justin Mauck Explosion welded design for cooling components
US6953143B2 (en) * 2003-04-11 2005-10-11 Advanced Energy Industries, Inc. Explosion welded design for cooling components
US20210057135A1 (en) * 2019-08-22 2021-02-25 Hyeongrak CHOI Apparatuses and methods for increasing magnetic flux density using superconductors
US11626227B2 (en) * 2019-08-22 2023-04-11 Massachusetts Institute Of Technology Apparatuses and methods for increasing magnetic flux density using superconductors

Also Published As

Publication number Publication date
FR2046910A1 (enrdf_load_stackoverflow) 1971-03-12
DE2029076A1 (de) 1971-01-07
FR2046910B1 (enrdf_load_stackoverflow) 1973-01-12
AT315271B (de) 1974-05-27
NL7008702A (enrdf_load_stackoverflow) 1970-12-22
GB1261597A (en) 1972-01-26
BE752294A (fr) 1970-12-21

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