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公开(公告)号：EP1236261A1
公开(公告)日：2002-09-04
申请号：EP00979222.7
申请日：2000-11-22
IPC分类号： H02J3/18
CPC分类号： H02J3/1842 , Y02E40/22
摘要： Power compensation is provided from a power compensation device (30) to a utility power network carrying a nominal voltage. The power compensation device has a steady-state power delivery characteristic. The power compensation is provided by detecting a change of a predetermined magnitude in the nominal voltage on the utility power network and controlling the power compensation device to deliver, for a first period of time and in response to the detected change in the nominal voltage, reactive power to the utility power network. The power compensation device is controlled to deliver, for a second period of time following the first period of time, reactive power to the utility power network at a level that is a factor N (N⊃1) greater than the steady-state power delivery characteristic of the power compensation device.
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公开(公告)号：EP1198847A1
公开(公告)日：2002-04-24
申请号：EP00948695.2
申请日：2000-07-14
发明人： ZHANG, Wei , SIEGAL, Edward, J. , RUPICH, Martin, W. , LI, Qi . , LI, Qi
IPC分类号： H01L39/24
CPC分类号： H01L39/248 , C30B23/002 , C30B23/02 , C30B29/16 , H01L39/143 , H01L39/2425 , H01L39/2451 , H01L39/2461 , Y10T428/12028
摘要： The invention relates to methods and compositions for making a multi-layer article. The compositions can be used in relatively fast methods which can superconductor material intermediates that have relatively few cracks and/or blisters. The compositions can have relatively low water contents.
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公开(公告)号：EP1188191A2
公开(公告)日：2002-03-20
申请号：EP00964889.0
申请日：2000-06-02
发明人： BUZCEK, David, M. , SCUDIERE, John, D. , HARNOIS, Richard, E. , SPREAFICO, Sergio , GHERARDI, Laura
IPC分类号： H01L39/02
CPC分类号： H01L39/02 , Y10S428/93 , Y10S505/927
摘要： A method for joining high temperature superconducting components while minimizing critical current degradation is provided. The articles formed have critical currents that are at least 80 % of the critical current of the high temperature superconducting components. Components (12, 14) in the form of wires or tapes are soldered along and are of overlap by using a solder mateial (16) and covered with a protective material (20). The invention further provides splicing geometries that facilitate wrapping joined components around a mandrel, tube or the like with minimal critical current degradation and without kinking or flexion of the joined components.
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公开(公告)号：EP0780024B1
公开(公告)日：2002-02-27
申请号：EP95933044.0
申请日：1995-09-08
IPC分类号： H01L39/24
CPC分类号： H01L39/248 , Y10T29/49014
摘要： A method of texturing a multifilamentary article having filaments comprising a desired oxide superconductor or its precursors by torsionally deforming the article is provided. The texturing is induced by applying a torsional strain which is at least about 0.3 and preferably at least about 0.6 at the surface of the article, but less than the strain which would cause failure of the composite. High performance multifilamentary superconducting composite articles having a plurality of low aspect ratio, twisted filaments with substantially uniform twist pitches in the range of about 1.00 inch to 0.01 inch (25 to 0.25 mm), each comprising a textured desired superconducting oxide material, may be obtained using this texturing method. If tighter twist pitches are desired, the article may be heat treated or annealed and the strain repeated as many times as necessary to obtain the desired twist pitch. It is preferred that the total strain applied per step should be sufficient to provide a twist pitch tighter than 5 times the diameter of the article, and twist pitches in the range of 1 to 5 times the diameter of the article are most preferred. The process may be used to make a high performance multifilamentary superconducting article, having a plurality of twisted filaments, wherein the degree of texturing varies substantially in proportion to the radial distance from the center of the article cross section, and is substantially radially homogeneous at any given cross section of the article. Round wires and other low aspect ratio multifilamentary articles are preferred forms. The invention is not dependent on the melting characteristics of the desired superconducting oxide. Desired oxide superconductors or precursors with micaceous or semi-micaceous structures are preferred. When used in connection with desired superconducting oxides which melt irreversibly, it provides multifilamentary articles that exhibit high DC performance characteristics and AC performance markedly superior to any currently available for these materials. In a preferred embodiment, the desired superconducting oxide material is BSCCO 2223.
摘要翻译： 提供了一种通过使制品扭转变形来制造具有包含所需氧化物超导体或其前体的长丝的复丝制品的方法。 通过在制品表面施加至少约0.3，优选至少约0.6的扭转应变，但小于可能导致复合材料失效的应变，诱发纹理化。 可以获得具有多个具有基本上均匀的扭曲节距的大约1.00英寸至0.01英寸（25至0.25mm）的低纵横比绞合长丝的高性能复丝超导复合制品，每个复合制品均包含纹理化期望的超导氧化物材料 使用这种纹理方法。 如果需要更紧的扭转节距，则可以对制品进行热处理或退火，并且根据需要重复该应变多次以获得所需的扭转节距。 优选的是，每个步骤施加的总应变应该足以提供比制品直径的5倍更紧的扭曲节距，并且最优选制品直径的1至5倍范围内的扭曲节距。 该方法可以用于制造具有多根加捻细丝的高性能复丝超导制品，其中加工程度基本上与距制品横截面中心的径向距离成比例地变化，并且在任何 给出文章的横截面。 圆线和其他低纵横比复丝制品是优选的形式。 本发明不依赖于期望的超导氧化物的熔化特性。 期望的具有云母或半云母结构的氧化物超导体或前体是优选的。 当与所需的不可逆熔化的超导氧化物结合使用时，它提供了具有高DC特性和AC性能的多丝制品，其性能明显优于目前可用于这些材料的任何超导氧化物。 在一个优选实施例中，所需的超导氧化物材料是BSCCO 2223。
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公开(公告)号：EP0648379B1
公开(公告)日：2002-02-27
申请号：EP93916729.2
申请日：1993-06-24
IPC分类号： H01L39/24
CPC分类号： H01L39/248 , Y10T29/49014
摘要： A modified powder-in-tube process produces a superconductor wire having a significantly greater current density than will a superconductor wire of the same nominal superconductor composition produced using conventional draw-swage-extrude-roll deformation. In the process disclosed, a superconductor precursor is placed within a ductile tube, the tube with the powder therein is then deformed into a cross section substantially corresponding to that of the end product, and the deformed tube is then subject to a plurality of heat treatments to convert the precursor into the desired superconducting ceramic oxide phase. Before the last of the heat treatments, the tube is isostatically pressed to densify and texture the superconductor precursor oxide in the tube.
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公开(公告)号：EP1042095A1
公开(公告)日：2000-10-11
申请号：EP98962801.1
申请日：1998-09-30
发明人： FRITZEMEIER, Leslie, G. , THOMPSON, Elliott, D. , SIEGAL, Edward, J. , THIEME, Cornelis, Leo, Hans , CAMERON, Robert, D. , SMITH, James, L. , HULTS, W., Larry
IPC分类号： B23B9/00
CPC分类号： H01L39/2454 , C22C9/06 , C30B23/02 , C30B25/02 , C30B25/18 , C30B29/22 , C30B29/225
摘要： An alloy capable of forming a (100) [001] cube-texture by thermo-mechanical techniques has 5 to 45 atomic percent nickel with the balance being copper. The alloy is useful as a conductive substrate for superconducting composites where the substrate is coated with a superconducting oxide. A buffer layer can optionally be coated on the substrate to enhance deposition of the superconducting oxide. Methods for producing the alloys, substrates, and superconductors are included.
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公开(公告)号：EP0692147B1
公开(公告)日：2000-08-02
申请号：EP94915352.2
申请日：1994-04-01
IPC分类号： H01L39/24
CPC分类号： H01L39/2464 , Y10S505/742 , Y10S505/782 , Y10S505/785
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28.发明公开
公开(公告)号：EP1021840A2
公开(公告)日：2000-07-26
申请号：EP97913661.1
申请日：1997-09-26
发明人： SEUNTJENS, Jeffrey, M. , CHRISTOPHERSON, Craig, J. , SNITCHLER, Gregory, L. , BARNES, William, L. , DEMORANVILLE, Kenneth
IPC分类号： H01L39/14
CPC分类号： H01L39/248 , H01L39/143 , Y10T29/49014
摘要： An oxide superconducting cable is provided having a plurality of strands comprised of at least one oxide superconductor filament sheathed in a ductile and conductive metal matrix and at least one of said strand further comprising a substantially continuous high resistivity coating substantially surrounding said at least one strand. The strands are positioned and arranged to form a cable. The cable is prepared by (a) applying a ductile predecessor coating to a plurality of strands, each said strand comprised of at least one oxide superconductor filament or a precursor thereto sheathed in a ductile metal matrix, and the ductile predecessor capable of conversion into a high resistivity material; (b) assembling the plurality of strands into a cable; and (c) converting the ductile predecessor into a high resistivity material, where steps (a) and (b) can be performed in any order.
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公开(公告)号：EP0773593B1
公开(公告)日：2000-07-12
申请号：EP96307753.2
申请日：1996-10-25
IPC分类号： H01L39/24
CPC分类号： H01L39/248 , Y10S505/887 , Y10S505/928 , Y10T29/49014
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30.发明公开
公开(公告)号：EP0909450A1
公开(公告)日：1999-04-21
申请号：EP97936943.0
申请日：1997-07-02
IPC分类号： H01F6
CPC分类号： H01F6/005 , G01R33/3815 , Y10T307/747 , Y10T307/826
摘要： The invention provides an apparatus for supplying power to superconducting loads including a current source, a cryogenic region (e.g., a cryogenic chamber), a first switching device in series between the current source and a superconducting load, and a second switching device in parallel with the superconducting load. The switching devices are arranged so that, when the first is closed and the second is open, recharging current is supplied to the superconducting load. The second switching device serves as a shunt. When it is closed and the first is open, current recirculates through the persistent (or partially persistent) superconducting load. The invention also provides a superconducting magnet incorporating such a power supply.
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