Superconducting Wire, Tape, Cable, Or Fiber, Per Se Patents (Class 505/230)
  • Patent number: 10134508
    Abstract: An MgB2 superconducting wire includes a core containing MgB2 and a metal sheath which surrounds the core. The core includes at least a first MgB2 core positioned on the center side, and a second MgB2 core positioned outside the first MgB2 core, and the density of the second MgB2 core is lower than the density of the first MgB2 core.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: November 20, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Youta Ichiki, Kazuhide Tanaka, Motomune Kodama
  • Patent number: 10128428
    Abstract: A process for the manufacturing of 100% dense TMC bulk material by hot isostatic pressing (HIP) for manufacturing of ternary molybdenum chalcogenide (TMC) single or multifilamentary superconducting wires, in particular that of SnMo6S8 (SMS) and PbMo6S8 (PMS). Such wires allows generation of magnetic fields in excess of 24 Tesla, the limit of the presently used Nb3Sn wires. In addition, TMC superconducting wires are complementary to Nb3Sn because they have about four times higher mechanical strength, i.e., yield strength Rp02. The deformation process by hot extrusion and the hot wire drawing allow plastic/superplastic deformation of the TMC superconductor with perfect grain boundaries, increase the critical current density. Further, the use of high purity molybdenum, with a residual resistivity ratio of at least 100, is considered as an additional inventive step because molybdenum serves not only as a diffusion barrier but simultaneously as electrical stabilizer.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: November 13, 2018
    Assignee: scMetrology Sàrl
    Inventor: Bernd Seeber
  • Patent number: 9972423
    Abstract: Reinforced materials for high temperature superconducting tape. More specifically reinforcement materials for significantly reducing the amount of required reinforcement and attaining much higher stress tolerances at practical conductor dimensions are described herein.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: May 15, 2018
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SOLID MATERIAL SOLUTIONS, LLC
    Inventors: Alexander Otto, Kouhei Yamazaki
  • Patent number: 9837808
    Abstract: The present invention relates to a superconducting power system which is capable of effectively absorbing an axial force caused by the contraction of a superconducting cable when the superconducting cable is cooled and in which the superconducting cable is installed in the form of minimizing unnecessary waste of an installation space, and a method of installing a superconducting cable.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: December 5, 2017
    Assignee: LS CABLE & SYSTEM LTD.
    Inventors: Young Seok Lim, Yong Hee Won, Young Il Cho, Chang Youl Choi
  • Patent number: 9634223
    Abstract: A super conductor is formed by a process including a first step of forming liquid-phase rare earth-copper-barium oxide by heat treating a superconductor precursor including a rare earth element, barium, and copper, a second step of forming a first superconductor of the rare earth-copper-barium oxide that is epitaxially grown from the liquid-phase rare earth-copper-barium oxide, and a third step of forming a second superconductor of the rare earth-copper-barium oxide by heat treating the first superconductor, wherein the heat treatment of the third step is performed in an atmosphere in which the rare earth-copper-barium oxide has no liquid phase.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: April 25, 2017
    Assignees: SUNAM CO., LTD., SNU R&DB FOUNDATION
    Inventors: Sang Im Yoo, Jung Woo Lee, Soon Mi Choi, Seung Hyun Moon, Hun-Ju Lee, Jae Hun Lee
  • Patent number: 9627119
    Abstract: A superconducting magnet and method for making a superconducting magnet, are presented. The superconducting magnet is made by forming a coil from windings of a first wire comprising a reacted MgB2 monofilament, filling a cavity of a stainless steel billet with a Mg+B powder. Monofilament ends of the first wire and a similar second wire are sheared at an acute angle and inserted into the billet. A copper plug configured to partially fill the billet cavity is inserted into the billet cavity. A portion of the billet adjacent to the plug and the wires is sealed with a ceramic paste.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: April 18, 2017
    Assignee: Massachusetts Institure of Technology
    Inventors: Seungyong Hahn, Yukikazu Iwasa, Juan Bascunan, John Peter Voccio, Jiayin Ling, Jungbin Song, YoungJae Kim
  • Patent number: 9627107
    Abstract: A method for operating a superconducting device (1; 1a, 1b), having a coated conductor (2) with a substrate (3) and a quenchable superconducting film (4), wherein the coated conductor (2) has a width W and a length L, is characterized in that 0.5?L/W?10, in particular 0.5?L/W?8, and that the coated conductor (2) has an engineering resistivity ?eng shunting the superconducting film (4) in a quenched state, with ?eng>2.5 ?, wherein RIntShunt=?eng*L/W, with RIntShunt: internal shunt resistance of the coated conductor (2). The risk of a burnout of a superconducting device in case of a quench in its superconducting film is thereby further reduced to such an extent that the device can be operated without use of an additional external shunt.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: April 18, 2017
    Assignee: Bruker HTS GmbH
    Inventor: Alexander Usoskin
  • Patent number: 9573852
    Abstract: A method of assembling together by brazing two parts made of composite material, each part having an assembly face for brazing with the assembly face of the other part, the method including: making a plurality of cavities in the assembly face of at least one of the two composite material parts, at least some of the cavities opening out into one or more portions of the part that are situated outside the assembly face; interposing capillary elements between the assembly faces of the composite material parts; placing a brazing composition in contact with a portion of the capillary elements; and applying heat treatment to liquefy the brazing composition so as to cause the molten brazing composition to spread by capillarity between the assembly faces of the composite material parts.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: February 21, 2017
    Assignees: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES, HERAKLES
    Inventors: Thomas Revel, Eric Conete, Eric Philippe, Valérie Chaumat
  • Patent number: 9378870
    Abstract: A superconducting joint and a cooling surface are provided as a combination. The superconducting joint joins superconducting wires each comprising superconducting filaments electrically joined together. The cooling surface comprises a thermally and electrically conductive material. An electrically isolating surface coating is provided on the cooling surface. The superconducting joint, the surface coating and the cooling surface are in thermal contact. The superconducting joint is electrically isolated from the cooling surface by the surface coating. The tails of the superconducting wires are wrapped around the electrically isolating surface coating.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: June 28, 2016
    Assignee: Siemens PLC
    Inventors: M'hamed Lakrimi, Jonathan Noys, Michael Simpkins, Adrian Mark Thomas
  • Patent number: 9251933
    Abstract: A superconducting joint and a cooling surface are provided as a combination. The superconducting joint joins superconducting wires each comprising superconducting filaments electrically joined together. The cooling surface comprises a thermally and electrically conductive material. An electrically isolating surface coating is provided on the cooling surface. The superconducting joint, the surface coating and the cooling surface are in thermal contact. The superconducting joint is electrically isolated from the cooling surface by the surface coating. The tails of the superconducting wires are wrapped around the electrically isolating surface coating.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: February 2, 2016
    Assignee: Siemens PLC
    Inventors: M'Hamed Lakrimi, Jonathan Noys, Michael Simpkins, Adrian Mark Thomas
  • Patent number: 9123459
    Abstract: An arrangement is provided at least one superconductive cable (4) and a first cryostat (K1). A second cryostat (K2) is provided, formed coaxially with and at a distance from the first cryostat (K1). Arranged in the intermediate space (12) between the first cryostat (K1) and the second cryostat (K2) is a high voltage resistant insulation (16) which completely surrounds the outer pipe (10) of the first cryostat (K1), and which rests on the latter, where liquefied gas conducted during the operation of the arrangement flows through the intermediate space (12) around the insulation and impregnates the insulation.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: September 1, 2015
    Assignee: NEXANS
    Inventors: Erik Marzahn, Christian Eric Bruzek
  • Patent number: 9070497
    Abstract: An arrangement is provided with at least one superconductive cable and a cryostat surrounding the cable is disclosed. The cryostat includes at least one thermally insulated pipe which encloses the superconductive cable and a hollow space for conducting a cooling agent therethrough. The cryostat is constructed in the same manner as the superconductive cable located in the cryostat for connection to stationary parts of a transmission path for electrical energy. At each of the ends of the cryostat (KR) constructed for connection to the stationary parts of the transmission path, two spaced apart bellows are mounted in the cryostat (KR), and between the two bellows each of the two ends of the cryostat (KR) a thermally insulated and curved pipe piece is mounted belonging to the cryostat (KR).
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: June 30, 2015
    Assignee: NEXANS
    Inventors: Mark Stemmle, Klaus Schippl, Stephan Lange, Michele Di Palma
  • Patent number: 9034124
    Abstract: A metal laminated substrate for an oxide superconducting wire is manufactured such that a non-magnetic metal plate T1 having a thickness of not more than 0.2 mm and a metal foil T2 made of Cu alloy which is formed by cold rolling at a draft of not less than 90% and has a thickness of not more than 50 ?m is laminated to each other by room-temperature surface active bonding, after lamination, crystal of the metal foil is oriented by heat treatment at a temperature of not less than 150° C. and not more than 1000° C. and, thereafter, an epitaxial growth film T3 made of Ni or an Ni alloy having a thickness of not more than 10 ?m is laminated to the metal foil.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: May 19, 2015
    Assignees: TOYO KOHAN CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hironao Okayama, Akira Kaneko, Takeshi Kato, Masaya Konishi
  • Patent number: 9031625
    Abstract: A superconducting wire includes a linear superconductor and a carbon nanotube structure. The carbon nanotube structure is located on the linear superconductor. The carbon nanotube structure includes a number of carbon nanotubes joined end to end by van der Waals attractive force between and arranged helically along an axial direction of the linear superconductor.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: May 12, 2015
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Xiao-Yang Lin, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 9031626
    Abstract: A superconducting wire includes a superconductor layer and a carbon nanotube layer. The superconductor layer and the carbon nanotube layer are stacked on each other and rolled to form the superconducting wire. Thus, the superconductor layer and the carbon nanotube layer are simultaneously rolled and alternately stacked on each other.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: May 12, 2015
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Xiao-Yang Lin, Kai-Li Jiang, Shou-Shan Fan
  • Publication number: 20150111755
    Abstract: A superconducting wire has a length that is sufficiently longer than a conventional one, and a critical current density that is uniformly high over the entire length thereof. Density of the magnesium diboride core is 1.5 g/cm3 or higher. A void is present in an arbitrary longitudinal cross-section in the longitudinal direction of the superconducting wire, when a length of a line segment which connects the most distant two points in a closed curve forming the void is assumed to be L, among the voids with length L of 20 ?m or greater, the number of voids with an angle formed by the line segment and the axis in the longitudinal direction of the superconducting wire of 45° or greater is less than the number of voids with the angle formed by the line segment and the axis in the longitudinal direction of the superconducting wire of smaller than 45°.
    Type: Application
    Filed: April 25, 2013
    Publication date: April 23, 2015
    Inventors: Motomune Kodama, Kazuhide Tanaka, Junichi Shimoyama, Akiyasu Yamamoto
  • Patent number: 9012780
    Abstract: Provided are a three-phase coaxial superconducting power cable and a structure thereof. A certain space is formed between adjacent superconducting wires of a superconducting layer (disposed at an outer portion) having more superconducting wires among a plurality of superconducting layers, and another wire is disposed in the space, or the superconducting wires of the respective superconducting layers are disposed to have different critical currents. Accordingly, a waste of superconducting wires is prevented, and the optimized three-phase coaxial superconducting power cable is provided.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: April 21, 2015
    Assignee: UIDUK University—Academic Coorportion Foundation
    Inventors: Min Won Park, In Keun Yu, Sang Jin Lee, Sung Kyu Kim, Sun Kyoung Ha
  • Patent number: 9006582
    Abstract: A ceramic substrate includes a substrate body formed of ceramic and having a pair of surfaces each assuming a rectangular shape as viewed in plane, and a metallization layer formed on the surface of the substrate body and adapted to braze a metal frame thereon. A composite material layer is disposed between the surface of the substrate body and the metallization layer and is formed such that a ceramic portion, a metal portion 10m formed of a metal similar to a metal component of the metallization layer or a metal which, together with a metal component of the metallization layer, forms an all proportional solid solution, and a glass portion exist together. The thickness of the composite material layer is thinner than that of the metallization layer. A plating layer is deposited on the surface of the metallization layer.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: April 14, 2015
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takatoshi Tojo, Shinji Suzumura, Yoshitaka Yoshida, Masahiro Ogawa
  • Patent number: 9008741
    Abstract: A superconducting structure (1) has a plurality of coated conductor tapes (2; 2a-2o), each with a substrate (3) which is one-sided coated with a superconducting film (4), in particular an YBCO film, wherein the superconducting structure (1) provides a superconducting current path along an extension direction (z) of the superconducting structure (1), wherein the coated conductor tapes (2; 2a-2o) provide electrically parallel partial superconducting current paths in the extension direction (z) of the superconducting structure (1), is characterized in that the coated conductor tapes (2; 2a-2o) are superconductively connected among themselves along the extension direction (z) continuously or intermittently. A more stable superconducting structure with which high electric current strengths may be transported is thereby provided.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: April 14, 2015
    Assignee: Bruker HTS GmbH
    Inventors: Alexander Usoskin, André Aubele
  • Patent number: 9008740
    Abstract: Techniques for protecting a superconducting (SC) article are disclosed. The techniques may be realized as an apparatus for protecting a superconducting (SC) article. The apparatus may comprise a porous sleeve configured to fit around the superconducting (SC) article. The porous sleeve may be made of non-conductive, dielectric material.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: April 14, 2015
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Gregory Citver, Semaan Fersan, Kasegn D. Tekletsadik, Scott Nickerson, Charles L. Stanley, Eric D. Hermanson
  • Patent number: 9006576
    Abstract: A superconductive cable which has a cryostat with two concentric metal pipes where the cryostat has at least a first axial section with a first axial spring constant, and at least a second axial section which has a second axial spring constant which at most is 20%, more preferred at most 10%, of the axial spring constant of the first section.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: April 14, 2015
    Assignee: Nexans
    Inventors: Mark Stemmle, Rainer Soika
  • Patent number: 9002424
    Abstract: A tape-shaped superconducting film-forming substrate is disclosed, which includes a film-forming face for forming a laminate including a superconducting layer thereon, a rear face that is a face at a side opposite to the film-forming face, a pair of end faces connected to the film-forming face and the rear face, and a pair of side faces connected to the film-forming face, the rear face, and the pair of end faces, in which each of the pair of side faces includes a spreading face that spreads toward an outer side in an in-plane direction of the film-forming face from an edge part of the film-forming face toward the rear face side. A superconducting wire and a superconducting wire manufacturing method are also disclosed.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: April 7, 2015
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Yoshinori Nagasu, Masaru Higuchi, Hisaki Sakamoto
  • Patent number: 8983563
    Abstract: The invention relates to a high temperature superconducting tape conductor having a flexible metal substrate that comprises at least one intermediate layer disposed on the flexible metal substrate and comprising terraces on the side opposite the flexible metal substrate, wherein a mean width of the terraces is less than 1 ?m and a mean height of the terraces is more than 20 nm, and that comprises at least one high temperature superconducting layer disposed on the intermediate layer, which is disposed on the at least one intermediate layer and comprises a layer thickness of more than 3 ?m. The ampacity of the high temperature superconducting tape conductor relative to the conductor width is more than 600 A/cm at 77 K.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: March 17, 2015
    Assignee: Theva Dunnschichttechnik GmbH
    Inventors: Robert Semerad, Werner Prusseit
  • Publication number: 20150065351
    Abstract: In one embodiment a superconductor tape includes a substrate comprising a plurality of layers, an oriented superconductor layer disposed on the substrate, and an alloy coating disposed upon the superconductor layer, the alloy coating comprising one or more metallic layers in which at least one metallic layer comprises a metal alloy.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 5, 2015
    Applicant: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Connie P. Wang, Paul Sullivan, Paul Murphy, Kasegn D. Tekletsadik, Bharatwaj Ramakrishnan
  • Patent number: 8965469
    Abstract: Disclosed are an oxide superconductor tape and a method of manufacturing the oxide superconductor tape capable of improving the length and characteristics of superconductor tape and obtaining stabilized characteristics across the entire length thereof. A Y-class superconductor tape (10), as an oxide superconductor tape, comprises a tape (13) further comprising a tape-shaped non-oriented metallic substrate (11), and a first buffer layer (sheet layer) (12) that is formed by IBAD upon the tape-shaped non-oriented metallic substrate (11); and a second buffer layer (gap layer) (14), further comprising a lateral face portion (14a) that is extended to the lateral faces of the first buffer layer (sheet layer) (12) upon the tape (13) by RTR RF-magnetron sputtering.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: February 24, 2015
    Assignee: SWCC Show Cable Systems Co., Ltd.
    Inventors: Tatsuhisa Nakanishi, Yuji Aoki, Tsutomu Koizumi, Atsushi Kaneko, Takayo Hasegawa
  • Publication number: 20150045230
    Abstract: Provided is a reinforcing-member-equipped oxide superconducting wire in which occurrence of defects such as separation of a reinforcing member due to a decrease in the strength of an edge portion is sufficiently suppressed, problems such as separation of a reinforcing member do not occur even when a force in a thickness direction is applied, and stable superconducting properties can be maintained. The reinforcing-member-equipped oxide superconducting wire includes an oxide superconducting wire and two reinforcing members that are disposed so as to sandwich the oxide superconducting wire. The reinforcing members are bonded to the oxide superconducting wire using solder, and each of the reinforcing members has a width equal to or smaller than a width of the oxide superconducting wire or at least surfaces of the oxide superconducting wire, the surfaces facing the reinforcing members, are covered with copper, nickel, or an alloy containing at least one of these metals.
    Type: Application
    Filed: April 1, 2013
    Publication date: February 12, 2015
    Inventors: Yuki Shingai, Masaya Konishi
  • Publication number: 20150045229
    Abstract: A superconducting wire connection structure comprises a first superconducting wire and a second superconducting wire, ends of which are arranged across from each other, and a third superconducting wire which spans and connects the first superconducting wire and the second superconducting wire along a longitudinal direction of the first superconducting wire and the second superconducting wire. Each of the first superconducting wire, the second superconducting wire and the third superconducting wire is a tape-shaped superconducting wire which includes a substrate laminated with at least a superconductive layer. The third wire is narrower in at least one portion than the first superconducting wire and the second superconducting wire.
    Type: Application
    Filed: February 6, 2013
    Publication date: February 12, 2015
    Inventors: Takaharu Mitsuhashi, Masashi Yagi
  • Patent number: 8954126
    Abstract: A superconductive electrical direct current cable with at least two conductors insulated relative to each other is indicated, where the cable is placed with at least two conductors insulated relative to each other, where the conductors are arranged in a cryostat suitable for guidance of the cooling agent, wherein the cryostat is composed of at least one metal pipe which is surrounded by a circumferentially closed layer with thermally insulating properties. In the cryostat is arranged a strand-shaped carrier composed of insulating material, where the carrier has at least two diametrically oppositely located outwardly open grooves in each of which is arranged one of the conductors. Each conductor is composed of a plurality of superconductive elements.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: February 10, 2015
    Assignee: Nexans
    Inventors: Mark Stemmle, Erik Marzahn
  • Publication number: 20150038334
    Abstract: A tape-shaped superconducting film-forming substrate is disclosed, which includes a film-forming face for forming a laminate including a superconducting layer thereon, a rear face that is a face at a side opposite to the film-forming face, a pair of end faces connected to the film-forming face and the rear face, and a pair of side faces connected to the film-forming face, the rear face, and the pair of end faces, in which each of the pair of side faces includes a spreading face that spreads toward an outer side in an in-plane direction of the film-forming face from an edge part of the film-forming face toward the rear face side. A superconducting wire and a superconducting wire manufacturing method are also disclosed.
    Type: Application
    Filed: February 6, 2013
    Publication date: February 5, 2015
    Inventors: Yoshinori Nagasu, Masaru Higuchi, Hisaki Sakamoto
  • Patent number: 8948831
    Abstract: A transmission system is provided with a superconductive cable having three phase conductors and a cryostat, surrounding the phase conductors, and encasing a hollow space, for conducting a cooling agent. For the three phase conductors, a common neutral conductor is provided, being made of electrically normally conducting material, carried out as insulating round conductor and placed outside the cryostat and next to it. The cryostat is made of a circumferentially enclosed, thermally insulated sheath.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: February 3, 2015
    Assignee: Nexans
    Inventors: Mark Stemmle, Frank Schmidt, Rainer Soika, Beate West
  • Publication number: 20150031547
    Abstract: A method is disclosed for electrically conductively connecting two superconductive cables. The ends of the two cables are arranged next to each other and parallel to one another, in such a way that their free ends point in the opposite direction, and their conductors are located at least approximately on the same level next to each other. Two conductors of the two cables are electrically conductively connected to each other through electrical contact elements (10, 11, 12). The screens (6) of the two cables (1, 2) are connected through by separate contact elements (13, 14, 15) and the two cable ends are treated in this manner for constructing a transmission length for electrical energy are arranged jointly in a housing (16) of a cryostat so that during operation of the transmission length, a flowable cooling agent with electrically insulating properties flows through a housing (16) of a cryostat.
    Type: Application
    Filed: July 24, 2014
    Publication date: January 29, 2015
    Inventors: Mark Stemmle, Frank Schmidt
  • Publication number: 20150031546
    Abstract: A connection structure for superconducting cables includes: superconducting cables that are connected to each other and include cable cores containing formers and superconducting conductor layers, and each cable core is housed in a thermal insulation tube with a cooling medium, wherein the cable cores include electric insulating layers obtained by winding insulating sheets around the superconducting conductor layers, the electric insulating layers on both sides of a conductor connecting part, in which the formers and the superconducting conductor layers are connected to each other, include taper shape portions each having a diameter reducing towards the conductor connecting part, each taper shape portion is formed so as to have an inclination angle changing in a stepwise fashion by a plurality of tapered portions among which a tapered portion nearer the conductor connecting part has smaller inclination angle, and a reinforcing insulating layer is provided between the taper shape portions.
    Type: Application
    Filed: April 15, 2013
    Publication date: January 29, 2015
    Inventors: Masashi Yagi, Tomoya Nomura, Hirao Hirata, Takaharu Mitsuhashi
  • Publication number: 20150024943
    Abstract: A compound superconducting wire 10 includes a reinforcement portion 12 and a compound superconductor 11. In the reinforcement portion 12, an assembly of plural reinforcement elements 4 are disposed. The reinforcement elements 4 each include plural reinforcement filaments 1 disposed in a stabilizer 2, and a stabilizing layer 3 at the outer periphery thereof. The reinforcement filaments 1 each mainly contain one or more metals selected from the group consisting of Nb, Ta, V, W, Mo, Fe, and Hf, an alloy consisting of two or more metals selected from the aforementioned group, or an alloy consisting of copper and one or more metals selected from the aforementioned group.
    Type: Application
    Filed: October 9, 2014
    Publication date: January 22, 2015
    Inventors: Masahiro SUGIMOTO, Hirokazu TSUBOUCHI, Kazuo WATANABE, Satoshi AWAJI, Hidetoshi OGURO
  • Publication number: 20150024942
    Abstract: A superconducting wire has: a substrate; a superconducting layer that is layered on one main surface side of the substrate; a stabilization layer that covers a surface of the superconducting layer and another main surface of the substrate; and an insulating layer that covers a surface of the stabilization layer, and that has an identification portion that identifies the substrate side and the superconducting layer side.
    Type: Application
    Filed: March 27, 2013
    Publication date: January 22, 2015
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yuko Hayase, Hiroyuki Fukushima, Hideyuki Hatakeyama, Yoshikazu Okuno, Yoshinori Nagasu, Masaru Higuchi, Hisaki Sakamoto
  • Publication number: 20150018221
    Abstract: A superconducting cable and connection structure includes one or more superconducting cables. Each cable has superconducting tapes wound about a former in a plurality of phases. Superconducting tapes of a first phase extends further toward a distal end of each cable end than the superconducting tapes of the second phase. The first and second cable ends of one superconducting cable (or a first end of a first superconducting cable and a second end of a second superconducting cable) are arranged with the first phase of the second cable end electronically coupled to the second phase of the first cable end. Connector structures may couple the cable ends together. The cable(s) form one or more loops within a cryostat, to form a degaussing coil.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 15, 2015
    Inventor: Daniël Cornelis van der Laan
  • Patent number: 8934951
    Abstract: An arrangement with at least one superconductive cable (4) and a first cryostat (K1) surrounding the cable. A second cryostat (K2) is formed around the first cryostat (K1) coaxially with and at a distance from the first cryostat (K1) for conducting a second cooling agent therethrough. The second cryostat (K2) is composed of two pipes (12, 13) which are arranged coaxially and at a distance from each other and, where a thermal insulation (14) is enclosed between the pipes, and where during operation of the arrangement a liquefied gas, having a temperature of 112K or less, is conducted through the cryostat (K2).
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: January 13, 2015
    Assignee: Nexans
    Inventors: Frank Schmidt, Mark Stemmle
  • Publication number: 20150005175
    Abstract: A method for manufacturing a superconducting wire material in which the superconducting current is not saturated even when a superconducting layer is made into a thick film, and a superconducting wire material. In the method a superconducting layer is formed on a metal substrate interposed by an intermediate layer, the method including heating the metal substrate up to the film-formation temperature of a superconducting film for forming the superconducting layer, forming a superconducting film having a film thickness of at least 10 nm and no more than 200 nm on the intermediate layer, and reducing the metal substrate temperature to a level below the film-formation temperature of the superconducting film, and the superconducting film-formation, including the heating, the film-formation, and the cooling, are performed a plurality of times.
    Type: Application
    Filed: February 1, 2012
    Publication date: January 1, 2015
    Applicants: FURUKAWA ELECTRIC CO., LTD., CHUBU ELECTRIC POWER COMPANY, INCORPORATED
    Inventors: Ryusuke Nakasaki, Akinobu Nakai, Tomonori Watanabe, Naoji Kashima, Shigeo Nagaya
  • Patent number: 8923940
    Abstract: A system with a three phase superconductive electrical transmission element is indicated, in which three superconductive electrical phase conductors are arranged insulated relative to each other and concentrically relative to each other, and in which a thermally insulated tubular cryostat is arranged which has a free space for conducting a cooling medium therethrough. The transmission element has at least two identically constructed cables (K1, K2), each of which has three electrical phase conductors (L1, L2, L3) which are insulated relative to each other and arranged concentrically relative to each other. The phase conductors (L1, L2, L3) of the two cables (K1, K2) are electrically switched in parallel in such a way that always one phase conductor of the one cable is connected to the phase conductor of the other cable.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: December 30, 2014
    Assignee: Nexans
    Inventors: Mark Stemmle, Beate West
  • Patent number: 8921276
    Abstract: The phase transition temperature, at which the crystal lattice of LMO that constitutes an oxide layer as an intermediate layer or as a part of an intermediate layer becomes cubic, is lowered. A substrate for a superconducting wire rod includes an oxide layer (LMO layer (22)) which contains, as a principal material, a crystalline material represented by the compositional formula: Laz(Mn1?xMx)wO3+? (wherein M represents at least one of Cr, Al, Co or Ti, ? represents an oxygen non-stoichiometric amount, 0<w/z<2, and 0<x?1).
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: December 30, 2014
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Masayasu Kasahara, Hiroyuki Fukushima, Yoshikazu Okuno, Yuko Hayase
  • Patent number: 8921275
    Abstract: A tape-shaped base for a superconducting wire, which simplifies the intermediate layer and thus enables production of a superconducting wire at lower cost, and which is capable of improving the characteristics (such as electrical conduction and handling properties) of a superconducting wire; and a superconducting wire. Specifically disclosed is a tape-shaped base for a superconducting wire, which is obtained by forming an intermediate layer on a metal substrate. In the tape-shaped base for a superconducting wire a biaxially oriented layer of the intermediate layer is configured of a niobium monoxide (NbO) layer that is formed by depositing vapor deposition particles from a vapor deposition source on a film formation surface.
    Type: Grant
    Filed: September 6, 2010
    Date of Patent: December 30, 2014
    Assignee: Furukawa Electric Co., Ltd.
    Inventor: Hiroyuki Fukushima
  • Publication number: 20140378313
    Abstract: The present invention refers to a method for applying a smoothening layer on a band substrate for subsequent manufacturing a high temperature superconductor tape, wherein the method comprises the steps: (a) applying a liquid containing polysilazane on at least one side of the band substrate; and (b) heating the liquid containing polysilazane to a temperature?450° C. for depositing a layer on the band substrate which comprises silicon oxynitride (SiNxOy, wherein 0?x<0.6 and 1.0<y?2.0), and/or silicon-carbon-oxynitride (SiCxNyOz, 2·y<x?1.0, 0<y<0.2 and 1.0<z?2.0).
    Type: Application
    Filed: May 23, 2014
    Publication date: December 25, 2014
    Applicant: Theva Dünnschichttechnik GmbH
    Inventor: Werner Prusseit
  • Publication number: 20140378314
    Abstract: Reinforced high temperature superconducting silver wire and materials, and methods of producing reinforced high temperature superconducting silver composite wire. More specifically reinforcement materials and assemblies for attaining much higher stress, bend and surface indent tolerances at practical conductor dimensions are described. The reinforced wire or methods can include a silver wire core and a layer of high strength reinforcing metal.
    Type: Application
    Filed: June 19, 2014
    Publication date: December 25, 2014
    Inventor: Alexander Otto
  • Publication number: 20140357495
    Abstract: A superconductor wire includes: a superconducting laminate that includes: a substrate and an intermediate layer; a superconductor layer, and a metal stabilization layer which are laminated on the substrate; and an insulation coating layer that covers an outer surface of the superconducting laminate and is formed by baking a resin material. Further, a maximum height Rz of at least a part of the outer surface of the superconducting laminate covered with the insulation coating layer is 890 nm or less.
    Type: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Applicant: Fujikura Ltd.
    Inventor: Masanori DAIBO
  • Publication number: 20140349854
    Abstract: Provided is an iron-based superconducting material including an iron-based superconductor having a crystal structure of ThCr2Si2, and nanoparticles which are expressed by BaXO3 (X represents one, two, or more kinds of elements selected from a group consisting of Zr, Sn, Hf, and Ti) and have a particle size of 30 nm or less. The nanoparticles are dispersed in a volume density of 1×1021m?3 or more.
    Type: Application
    Filed: February 28, 2014
    Publication date: November 27, 2014
    Applicant: International Superconductivity Technology Center
    Inventors: Masashi Miura, Seiji Adachi, Keiichi Tanabe, Hideo Hosono
  • Patent number: 8897845
    Abstract: An arrangement for electrically conductively connecting two electrical units by means of a bipolar high voltage direct current transmission, in which between the units are arranged at least two electrical direct current cables constructed as superconductive cables. The superconductive cables are mounted separately from each other in a cryostat (1,2) suitable for conducting a cooling agent which has at least one metal pipe provided with a thermal insulation. The cryostats (1,2) are connected with at least one of their ends to a cooling plant (7) supplying the cooling agent and a pipeline (3) is placed parallel to the two cryostats (1,2). The pipeline (3) is connected at both its ends to the two cryostats (1,2) through valves (15,16,17) which are closed during uninterrupted operation and, in the case of an interruption at one of the superconductive cables, the pipeline (3) serves with the then open valves for conducting the cooling agent intended for the cryostat of the impaired cable.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: November 25, 2014
    Assignee: NEXANS
    Inventors: Mark Stemmle, Erik Marzahn
  • Publication number: 20140342916
    Abstract: Provided is a method of forming a superconducting wire. In the method, a buffer layer is formed on a substrate. Then, a superconducting precursor film is formed on the substrate formed with the pinning seed layer. Thereafter, the substrate formed with the superconducting precursor film is heat-treated to form a superconducting film including magnetic flux pinning centers on the substrate. The magnetic flux pinning centers comprise at least one element included in the pinning seed layer, and at least one element included in the superconducting precursor film.
    Type: Application
    Filed: January 17, 2013
    Publication date: November 20, 2014
    Inventors: Seung Hyun Moon, Jae Hoon Lee, Hun-Ju Lee
  • Publication number: 20140342917
    Abstract: A method for manufacturing a superconducting wire includes the following steps. A laminate metal having a first metal layer and a Ni layer formed on the first metal layer is prepared. An intermediate layer (20) is formed on the Ni layer of the laminate metal. A superconducting layer (30) is formed on the intermediate layer (20). By subjecting the laminate metal to a heat treatment after at least either of the step of forming a intermediate layer (20) and the step of forming a superconducting layer (30), a nonmagnetic Ni alloy layer (12) is formed from the laminate metal.
    Type: Application
    Filed: August 5, 2014
    Publication date: November 20, 2014
    Inventor: Hajime Ota
  • Patent number: 8886267
    Abstract: A cryogenically-cooled HTS cable is configured to be included within a utility power grid having a maximum fault current that would occur in the absence of the cryogenically-cooled HTS cable. The cryogenically-cooled HTS cable includes a continuous liquid cryogen coolant path for circulating a liquid cryogen. A continuously flexible arrangement of HTS wires has an impedance characteristic that attenuates the maximum fault current by at least 10%. The continuously flexible arrangement of HTS wires is configured to allow the cryogenically-cooled HTS cable to operate, during the occurrence of a maximum fault condition, with a maximum temperature rise within the HTS wires that is low enough to prevent the formation of gas bubbles within the liquid cryogen.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: November 11, 2014
    Assignee: American Superconductor Corporation
    Inventors: Douglas C. Folts, James Maguire, Jie Yuan, Alexis P. Malozemoff
  • Patent number: 8880135
    Abstract: The present invention is configured such that, in a low AC loss oxide superconductor constituted by providing an oxide superconducting layer 6 on a substrate 1, said oxide superconducting layer 6 is separated into a plurality of filament conductors 2 in parallel to the lengthwise direction of said substrate 1 by dividing grooves 3 plurally formed in the widthwise direction of said substrate, and a high-resistance oxide 8 is formed in said dividing grooves 3. Because of the invention, it is possible to increase the insulation properties of individually divided mated filament conductors, and to obtain an oxide superconductor that has low AC loss.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: November 4, 2014
    Assignees: Railway Technical Research Institute, International Superconductivity Technology Center, the Juridical Foundation, Kyushu University, National University Corporation
    Inventors: Kenji Suzuki, Saburo Hoshi, Junko Matsuda, Teruo Izumi, Yuh Shiohara, Masataka Iwakuma
  • Publication number: 20140323314
    Abstract: An oxide superconductor wire includes: a tape-shaped oxide superconductor laminate that is formed by providing an intermediate layer on a front surface side of a metal tape-shaped substrate, providing an oxide superconductor layer on the intermediate layer, and providing a protective layer on the oxide superconductor layer; and a coating member that includes a metal tape and a low melting point metal layer, in which the metal tape has a wider width than that of the oxide superconductor laminate and covers the protective layer surface of the oxide superconductor laminate, both side surfaces of the oxide superconductor laminate, and both end portions of a substrate back surface side in a width direction thereof, and both end portions of the metal tape in a width direction thereof are provided to cover both the end portions of the substrate back surface.
    Type: Application
    Filed: May 19, 2014
    Publication date: October 30, 2014
    Applicant: FUJIKURA LTD.
    Inventor: Tetsuo TAKEMOTO