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公开(公告)号：JPH11195332A
公开(公告)日：1999-07-21
申请号：JP30420898
申请日：1998-10-26
Applicant: ABB RESEARCH LTD
Inventor： CHEN MAKAN DR , LAKNER MARTIN DR , PAUL WILLI DR
Abstract: PROBLEM TO BE SOLVED: To provide a ceramic high-temperature superconductor used for a current limiter on an alternating current line. SOLUTION: A ceramic high-temperature superconductor 1 has a bypass layer 2 having electrical resistance larger than decuple of that of a pure noble metal. The noble metal bypass layer 2 (preferably, silver) of the high- temperature superconductor 1 is allayed with a base metal (preferably, Pb, Bi, Ga) by heat treatment. The ratio of thickness d2 of the noble metal bypass layer to thickness d1 of the superconductor 1 is set to be less than 1/5. A steel base metal bypass layer 3 has electrical resistance between 10 μΩ×cm and 100 μΩ×cm at 77 k and it is soldered or welded with static pressure to the noble metal containing bypass layer 2. The thickness d2 of the noble metal bypass layer and a thickness d3 of the base metal bypass layer are set to be ρ2/d2>0.5×ρ3/d3. Here, the ρ2 and the ρ3 are respectively electrical risistivities of the noble metal containing bypass layer 2 and the base metal bypass layers 3, 3'.
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公开(公告)号：JPH11219627A
公开(公告)日：1999-08-10
申请号：JP30420798
申请日：1998-10-26
Applicant: ABB RESEARCH LTD
Inventor： CHEN MAKAN DR , LAKNER MARTIN DR , PAUL WILLI DR
Abstract: PROBLEM TO BE SOLVED: To provide a high temperature superconductor of ceramics to be use as a current limiter of an AC line. SOLUTION: A high temperature superconductor 1 of ceramics includes a bypass layer 2 whose electric resistivity is 10 times or more greater than that of a noble metal. The noble metal bypass layer 2 (preferably, of silver) of this high temp. superconductor is turned into alloy with the base metal (preferably Pb, Bi, Ga, Al) of an alloy metal layer 3 through a heat treatment. Before heat treatment, a plurality of methods are exhibited to apply the alloy metal layer 3 to the noble metal bypass layer 2. The layer thickness d1 of the high temp. superconductor 1 is adjusted so as to be smaller than 500 μm. The ratio to d1 of the thickness d2 of the noble metal bypass layer 2 should be adjusted so as to be smaller than 1/5.
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公开(公告)号：DE19756624A1
公开(公告)日：1999-07-01
申请号：DE19756624
申请日：1997-12-19
Applicant: ABB RESEARCH LTD
Inventor： CHEN MAKAN DR , LAKNER MARTIN DR , PAUL WILLI DR
IPC: H02H9/02
Abstract: The arrangement has a first series circuit, containing at least a first high temp. superconductor (SLa) and a first switch (Sa), and an inductive impedance (3) connected in parallel with the series circuit. The inductive impedance is a choke coil; the high temp. superconductor is arranged outside the choke coil. A further similar series circuit can be connected in parallel with the first, with the switches (Sa,Sb) adopting opposite states - DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method of operating the arrangement
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Patent Agency Ranking
公开(公告)号：DE19631439C1
公开(公告)日：1997-12-04
申请号：DE19631439
申请日：1996-08-03
Applicant: ABB RESEARCH LTD
Inventor： LAKNER MARTIN DR , PAUL WILLI DR
Abstract: In a tubular high temperature superconductor arrangement having one or more hollow cylindrical superconductors, provided with metallic non-superconductive electrical stabilisation on one or both surfaces, and one or more mechanical reinforcements, the novelty is that the superconductor (6) has, at least at its inner side, a further mechanical reinforcement of a fibre composite material forming a strong bond with the superconductor (6). Preferably, the fibre composite material is electrically insulating, contains glass and/or carbon fibres and is bonded to a holder (10) for the superconductor (6) by a synthetic resin or a silicone thermoplastic material.
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公开(公告)号：DE19746976A1
公开(公告)日：1999-05-12
申请号：DE19746976
申请日：1997-10-24
Applicant: ABB RESEARCH LTD
Inventor： CHEN MAKAN DR , LAKNER MARTIN DR , PAUL WILLI DR
Abstract: The high temperature super conductor (1) has a bypass layer (2) of rare earth material. The super conductor layer is of silver alloyed with Pb,Bi or Ga. The thickness (d2) of the bypass layer is less than one fifth of that of the super conductor which in the range of 0.5micron to 2mm. The by pass layer is covered by a layer of steel.
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公开(公告)号：DE19755445A1
公开(公告)日：1999-02-11
申请号：DE19755445
申请日：1997-12-13
Applicant: ABB RESEARCH LTD
Inventor： KOENIG FRIEDRICH , LAKNER MARTIN DR
IPC: H01B12/06
Abstract: The superconductor ribbon (4,4') has a carrier ribbon (1) in at least one recess (2,2'), secured by an adhesive (6,6'). A layer of varnish (5) covers the carrier (1) and superconductor (4,4') ribbons. The varnish layer (5) is of polyacetates, phenols, polyimides, polyurethanes, polymers which set in ultra violet light, or esterimides.
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公开(公告)号：BR9805450A
公开(公告)日：1999-11-23
申请号：BR9805450
申请日：1998-12-18
Applicant: ABB RESEARCH LTD
Inventor： CHEN MAKAN DR , LAKNER MARTIN DR , PAUL WILLI DR
IPC: H02H9/02
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公开(公告)号：DE19746975C1
公开(公告)日：1999-03-11
申请号：DE19746975
申请日：1997-10-24
Applicant: ABB RESEARCH LTD
Inventor： CHEN MAKAN DR , LAKNER MARTIN DR , PAUL WILLI DR
IPC: C23C26/00 , C23C2/02 , H01B12/06 , H01B13/00 , H01L39/16 , H01L39/24 , C04B41/88 , C04B35/50 , C23C14/14 , C23C30/00
Abstract: Alloying of a precious metal by-pass layer of a ceramic high temperature superconductor is carried out by coating the precious metal layer with an alloying metal layer of thickness such that the total resistivity of these two layers is more than ten times that of the unalloyed precious metal layer at 77 K. A method of alloying a precious metal by-pass layer of a ceramic high temperature superconductor involves: (a) providing a superconductor layer of a thickness less than 500 mu m and not more than five times the precious metal by-pass layer thickness; and (b) applying an alloying metal layer as described above.
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