EP0610131B1 - Verbindungsdurchführung für supraleitende Spule - Google Patents

Verbindungsdurchführung für supraleitende Spule Download PDF

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Publication number
EP0610131B1
EP0610131B1 EP94400211A EP94400211A EP0610131B1 EP 0610131 B1 EP0610131 B1 EP 0610131B1 EP 94400211 A EP94400211 A EP 94400211A EP 94400211 A EP94400211 A EP 94400211A EP 0610131 B1 EP0610131 B1 EP 0610131B1
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EP
European Patent Office
Prior art keywords
conductors
cryostat
coil
superconductive
connection according
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.)
Expired - Lifetime
Application number
EP94400211A
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English (en)
French (fr)
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EP0610131A1 (de
Inventor
Christian Cottevieille
Gerard Bottini
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Alstom SA
Original Assignee
GEC Alsthom Electromecanique SA
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Publication of EP0610131A1 publication Critical patent/EP0610131A1/de
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Publication of EP0610131B1 publication Critical patent/EP0610131B1/de
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • H01F6/065—Feed-through bushings, terminals and joints
    • 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
    • Y10S336/00—Inductor devices
    • Y10S336/01—Superconductive
    • 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
    • Y10S505/879—Magnet or electromagnet

Definitions

  • the present invention relates to a connection intended for the electrical supply of a high-voltage superconductive coil, with a high nominal current, of several hundred amperes. It can for example be a current limiter of 63 kV and 1200 Amps; it must be able to withstand 2.2 times its nominal voltage, ie 139kV (IEC71 recommendation).
  • the connection makes it possible to electrically connect the superconductive coil placed in a cryostat within a cryogenic fluid at very low temperature, to a conductor placed outside and being at ambient temperature (300K).
  • the object of the present invention is to provide a connection making it possible to supply high current in a balanced manner to high-voltage superconductive coils.
  • the object of the present invention is a connection for the electrical supply of a transposed superconductive coil.
  • the coil is placed in a cryostat and comprises a plurality of identical superconducting conductors, the accessible ends of which are uniformly distributed in a cylindrical symmetry.
  • the connection is constituted by two current leads composed of a plurality of identical conductors between them comprising a first end and a second end.
  • connection is characterized in that the number of conductors is identical for the two leads and equal to the number of superconductive conductors of the coil; it is also characterized in that the conductors of the leads are arranged regularly and parallel in a cylindrical symmetry with respect to the axis of the coil; it is further characterized in that the feeds are arranged coaxially; and it is finally characterized in that the first end of the conductors of the leads is connected to the superconductive conductors.
  • connection according to the invention does not break the cylindrical symmetry of the coil and it guarantees the balance of the currents.
  • the present invention has the advantage of allowing a balanced supply of the coil, so each superconductive conductor can transport its critical current and be used under optimal conditions.
  • the section total of all the conductors of the input leads on the one hand and the output on the other hand is fixed according to the current to be transported.
  • connection between a conductor of a supply and a superconductive conductor of the coil is made by placing their ends side by side over a length of about 10cm. Then, the conductors of each current supply are connected to the superconductive conductors of the coil by lead-tin type welding, or by magnetoforming.
  • the second end of the conductors of each current supply is secured to a cylindrical conductive part.
  • This part is chosen in shape and size adapted to the voltage level and the current carried.
  • the cylindrical conductive part is made of copper.
  • each of the conductors of the current supply is placed individually inside an electrical insulating tube.
  • These insulating tubes can be made of epoxy glass or a similar material.
  • the tubes containing each conductor individually are arranged in a cylindrical symmetry.
  • a circulation of vapor of the cryogenic fluid ensuring the cooling of the conductors of the current leads is produced inside the insulating tube.
  • these tubes are filled with cryogenic fluid which is surmounted by its vapors.
  • the conductors of each of the feeds are placed inside the double wall of an electrical insulating tube, the two tubes being arranged coaxially.
  • a circulation of vapor of the cryogenic fluid ensuring the cooling of the conductors is carried out inside the double wall of the insulating tubes.
  • the present invention has the advantage that the overall structure of the installation makes it possible to avoid the use of polycarbonate tubes whose dimensions are too penalizing.
  • the conductors of the current leads are of the assembled type comprising several strands, consisting of copper filaments in a cupronickel matrix to reduce losses by induced current, the optimized losses of which are 1.2W / kA at rated current.
  • the conductors of the current leads are of the mixed type comprising, in their part at low temperature, a superconducting element at high critical temperature, as described in French patent n ° 91 07967.
  • connection according to the invention is intended to be applied to a device comprising a superconductive coil placed in a cryostat.
  • the cryostat has an outer wall and an inner metal wall brought to high voltage separated by a vacuum.
  • the outer wall of the cryostat consists of an electrical insulating material, such as a composite.
  • the outer wall of the cryostat carries fins made of insulating material, for example an elastomer loaded or not with glass or ceramic, intended to increase the line of flight.
  • the outer wall of the cryostat is metallic and grounded.
  • the walls are also isolated from each other by a piece of insulating material comprising anticoronas, that is to say toroidal profiles with conductive surface intended to avoid the "crown" effect.
  • This insulating material is for example a ceramic, a composite, or a similar material.
  • the piece of insulating material comprises fins of insulating material which may be identical to or different from that of the piece.
  • a solid electrical insulator is added between the conductors in the hot zone of the cryostat.
  • This insulator may be polycarbonate, polyethylene, epoxy resin, or any similar material, or else this insulator may consist of a chamber containing a liquid insulator of the transformer oil or silicone oil type, or a gaseous insulator such as nitrogen, sulfur hexafluoride, or another gas with better dielectric strength than helium.
  • the enclosure can advantageously be thermally isolated from the vapors of the cryogenic fluid by an appropriate thermal insulator such as vacuum or expanded polystyrene.
  • FIG. 1 a superconductive coil 1 and its two current leads placed in a cryostat 4 within a cryogenic fluid 5, which is liquid helium (4.2K), surmounted by its vapors 6.
  • a cryogenic fluid 5 which is liquid helium (4.2K), surmounted by its vapors 6.
  • Each current supply is made up of four conductors, only two of which are visible and two are hidden, marked 2 and 3 respectively for the current input and output.
  • the superconductive coil 1 is shown in an enlarged view in FIG. 2.
  • Four superconductive conductors 101 to 104 are wound side by side to form a superconductive coil.
  • the ends of the superconductive conductors are arranged on either side of the coil in a cylindrical symmetry along the axis 105 of the coil.
  • a first end 101 'to 104' of the superconductive conductors 101 to 104 is connected to the conductors 2 of the current input supply, and a second end 101 "to 104" of the superconductive conductors 101 to 104 is connected to the conductors 3 of the current output supply.
  • an electrical supply circuit 12 located outside (300K) of the cryostat 4, is connected to the coil 1 by the two leads current input and output.
  • the conductors, input 2 on the one hand and output 3 on the other hand, are regularly arranged parallel along the generator of a cylinder coaxial with the axis 105 of the coil.
  • the conductors 2 of the current input supply are secured to a conductive piece 17 preferably made of copper; similarly, the conductors 3 of the current output supply are secured to a conductive piece 18, preferably also made of copper.
  • a conductive piece 17 preferably made of copper similarly, the conductors 3 of the current output supply are secured to a conductive piece 18, preferably also made of copper.
  • These two parts 17 and 18 are connected, and electrically insulated from each other, by a part 20 correctly dimensioned in insulating material, such as a composite or any other similar material.
  • the conductors 2 of the current input supply are connected to the ends 101 'to 104' of the superconductive conductors of the coil 1.
  • This connection 19 is made by placing the end of a conductor 2 and the end 103 'of a superconductive conductor side by side over a length of about 10 cm and joining them by welding, for example of the lead-tin type, or by magnetoforming.
  • the conductors 3 of the current output supply are connected to the ends 101 "to 104" of the superconductive conductors of the coil 1.
  • This connection 19 ' is made in the same way as above between the end of a conductor 3 and the end 101 "of a superconductive conductor of the coil 1.
  • the conductors 2 and 3 of the current inlet and outlet leads are placed individually in an electrical insulating tube, respectively 13 and 14, perforated in its lower part and immersed in the cryogenic liquid 5 Inside these tubes circulate the vapors 6 of the cryogenic fluid 5 ensuring the cooling of the conductors 2 and 3. Passages are provided in the copper parts 17 and 18, and in the insulating part 20 to allow the escape of the vapors 6.
  • Thermal screens 15 regulate the heat exchange between the cryogenic fluid 5 and the hot zone of the cryostat 4.
  • the electrical insulation between the conductors 2 and 3 of the current inlet and outlet leads is improved by the presence a solid electrical insulator 16 which may consist of a solid material or an enclosure containing an insulating fluid (liquid or gaseous).
  • the cryostat 4 consists of an external wall 7 made of insulating material, such as for example a composite or any other similar material, and of a metallic internal wall 8 brought to high voltage. The two walls are separated by a vacuum 9.
  • the cryostat is provided at its upper part with toric profiles with conductive surface 10 intended to avoid the "crown" effect, and subsequently denoted "anticoronas". Fins 11 made of insulating material, such as for example an elastomer, intended to increase the creepage distance can be arranged on the outer wall, covering part or all of its height.
  • FIG. 4 a variant of Figure 1 is shown in which the outer wall 301 of the cryostat 302 is metallic and grounded.
  • the external wall 301 and the internal metal wall 8 carried at high voltage are electrically insulated on the one hand by the vacuum 9, and on the other hand by a part 303 made of insulating material such as a ceramic or a composite.
  • Room 303 must be fitted with anticoronas 304 adapted to the voltage level.
  • the part 303 can also be fitted with fins of insulating material, for example an elastomer, intended to increase the line of flight and similar in shape to those previously described and shown in FIG. 1.
  • FIG. 5 shows a variant of the connection according to the invention in which the external wall 7 of the cryostat 401 is insulating and provided with fins 11.
  • a metal flange 402 carrying anticoronas 10 electrically connects the internal wall 8 of the cryostat 401 to a cylindrical copper piece 403.
  • Each current supply consists of twelve conductors.
  • the conductors 2 of the input supply on the one hand and 3 of the current output supply on the other hand are regularly arranged parallel along the generatrix of a cylinder coaxial with the axis 404 of the coil 405.
  • the conductors 2 and 3 are respectively secured to a conductive part 403 and 18, preferably made of copper.
  • the parts 403 and 18 are electrically insulated by a part 409 correctly dimensioned in insulating material, such as a composite or similar material.
  • the second end of the conductors 2 and 3 is connected to the twelve superconductive conductors of the coil 405 according to the technique described above.
  • the detail of these connections 19 and 19 ' is given in FIG. 6, where we see the conductors 2 and 3 connected to the ends 216' and 216 "of the superconductive conductor 216 of the coil 405.
  • the conductors 2 of the current inlet are placed in the double wall of an electrical insulating tube 406, at the lower part of which there is cryogenic fluid 5 surmounted by its vapors 6.
  • the conductors 3 of the the current output leads are likewise arranged in the double wall of an electrical insulating tube 407.
  • the two tubes 406 and 407 are placed coaxially.
  • the walls of each of the tubes are perforated at their lower part to allow the cryogenic fluid 5 to be introduced into the double wall.
  • the conductors 2 and 3 are cooled by the vapors 6 of the cryogenic fluid 5 which go up along the conductors. Outside and in the space between the tubes, the vapors 6 of the cryogenic fluid 5 also circulate, which pass through the double wall of each tube through the passages 408.
  • the vapors 6 escape through passages made in the copper parts. 403 and 18, and the insulating part 409.
  • FIG. 7 A section of the cryostat 401 containing the tubes 406 and 407 is presented in FIG. 7. We see there the insulating outer wall 7 and the inner wall 8 of the cryostat separated by the vacuum 9. The double walls of the tubes 406 and 407 respectively surround the conductors 2 and 3. The vapors 6 of the cryogenic fluid are present in the double wall of the tubes 406 and 407, and also around and between the two tubes.
  • FIG. 8 shows a connection according to the invention between a superconductive coil 1 placed in a cryostat 4 (4.2K) and an electrical supply circuit 12 located outside (300K), in the case where the conductors 510 and 511 of each of the two current leads are of the mixed type described in French patent n ° 91 07967.
  • Each metallic conductor 510 or 511 is immersed in a bath of liquid nitrogen 501 surmounted by its vapors. It is connected to a superconducting element 502 at high critical temperature, for example the phase 2212 of an alloy based on bismuth, strontium, calcium and copper oxide, which provides the junction between 4.2K and the intermediate temperature 77K.
  • This element 502 is itself connected to the end 101 ′ of one of the superconductive conductors 101 to 104 of the coil 1 which is in the bath of liquid helium 5 at 4.2K.
  • An insulation vacuum 503 surrounding the nitrogen bath 501 and the superconductor 502 is separated from the helium vapors by a metal wall 504 of low electrical and thermal conductivity, such as 304L stainless steel.
  • the liquid nitrogen bath 501 is contained in a metal container 505, in material similar to the metal wall 504, which is extended in its upper part by an electrical insulating tube 509 made of epoxy glass or a similar material.
  • the contact between the two ends of the superconductive element 502 and the terminals 506 and 507 is made by the method described by GRIVON et al.
  • the upper terminal 506 is thermally insulated from the liquid nitrogen tank by an insulating ceramic 508.
  • This technology makes it possible to reduce the heat losses by a factor of between three and five depending on the nature of the metal conductors.
  • the electrical insulation between the conductors 510 and 511, when the winding passes, is ensured in the hot zone by the nitrogen vapors which have at this temperature a dielectric strength ten times greater than that of helium; this is advantageous with a view to developing towards high voltages.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Insulators (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Particle Accelerators (AREA)
  • Linear Motors (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (17)

  1. Anschluß für die Stromversorgung einer transponierten supraleitenden Spule (1), die in einem Kryostaten (4) angeordnet ist und eine Vielzahl von untereinander gleichen Supraleitern (101 ... 104) enthält, deren zugängliche Enden gleichmäßig gemäß einer zylindrischen Symmetrie verteilt sind, wobei der Anschluß aus zwei Stromzuführungen besteht, die aus einer Vielzahl von untereinander gleichen Leitern (2, 3) mit einem ersten Ende und einem zweiten Ende bestehen, dadurch gekennzeichnet, daß die Anzahl von Leitern (2, 3) der beiden Zuführungen gleich ist und der Anzahl von Supraleitern (101 ... 104) der Spule entspricht, daß die Leiter (2, 3) der Zuführungen regelmäßig und parallel gemäß einer in Bezug auf die Achse (105) der Spule (1) zylindrischen Symmetrie angeordnet sind, daß die Zuführungen koaxial angeordnet sind und daß das erste Ende der Leiter der Zuführungen mit den Supraleitern (101 .. 104) verbunden ist.
  2. Anschluß nach Anspruch 1, dadurch gekennzeichnet, daß die Leiter (2, 3) jeder Stromzuführung mit den Supraleitern (101 ... 104) der Spule (1) durch Löten oder Magnetformen verbunden sind.
  3. Anschluß nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das zweite Ende der Leiter (2, 3) jeder Stromzuführung fest mit je einem zylindrischen leitenden Teil (17, 18) verbunden ist.
  4. Anschluß nach Anspruch 3, dadurch gekennzeichnet, daß das zylindrische leitende Teil (17, 18) aus Kupfer ist.
  5. Anschluß nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jeder Leiter (2, 3) der Stromzuführungen einzeln je im Inneren eines elektrisch isolierenden Rohrs (13, 14) angeordnet ist.
  6. Anschluß nach Anspruch 5, dadurch gekennzeichnet, daß eine Strömung (6) von Tiefsttemperaturfluid-Dampf (5), der die Kühlung der Leiter (2, 3) der Stromzuführungen gewährleistet, innerhalb des Isolierrohrs ausgebildet ist.
  7. Anschluß nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Leiter (2, 3), die jede der Zuführungen bilden, zwischen den beiden Wänden je eines doppelwandigen elektrisch isolierenden Rohrs (406, 407) angeordnet sind, wobei die beiden Rohre koaxial angeordnet sind.
  8. Anschluß nach Anspruch 7, dadurch gekennzeichnet, daß ein die Kühlung der Leiter (2, 3) der Stromzuführungen gewährleistender Umlauf (6) des Dampfes des Tiefsttemperaturfluids (5) zwischen den beiden Wänden der Isolierrohre (406, 407) ausgebildet ist.
  9. Anschluß nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Leiter (2, 3) der Stromzuführungen mehrere aus Kupferfäden bestehende Litzen in einer Kupfer-Nickel-Matrix enthalten.
  10. Anschluß nach einem der Ansprüche 5 und 6, dadurch gekennzeichnet, daß die Leiter (2, 3) von der gemischten Art sind, die in ihrem Tieftemperaturbereich ein supraleitendes Element mit hoher kritischer Temperatur aufweisen.
  11. Anwendung des Anschlusses nach einem der vorhergehenden Ansprüche auf eine Vorrichtung mit einer supraleitenden Spule (1), die in einem Kryostaten (4) angeordnet ist, dadurch gekennzeichnet, daß der Kryostat (4) eine Außenwand (7) und eine auf hohe Spannung gebrachte metallische Innenwand (8) besitzt, die durch ein Vakuum (9) voneinander getrennt sind.
  12. Anwendung nach Anspruch 11, dadurch gekennzeichnet, daß die Außenwand (7) des Kryostaten (4) aus einem elektrisch isolierenden Material besteht.
  13. Anwendung nach Anspruch 12, dadurch gekennzeichnet, daß die Außenwand (7) Rippen (11) aus Isoliermaterial aufweist.
  14. Anwendung nach Anspruch 11, dadurch gekennzeichnet, daß die Außenwand (30) des Kryostaten (302) aus Metall ist.
  15. Anwendung nach Anspruch 14, dadurch gekennzeichnet, daß die Wände des Kryostaten außerdem gegeneinander durch ein Teil aus Isoliermaterial (303) isoliert sind, das Antikoronas aufweist.
  16. Anwendung nach Anspruch 15, dadurch gekennzeichnet, daß das Teil aus Isoliermaterial (303) Rippen aus Isoliermaterial besitzt.
  17. Anwendung nach Anspruch 11, dadurch gekennzeichnet, daß ein massives elektrisches Isoliermaterial zwischen die Leiter in der heißen Zone des Kryostaten eingefügt ist.
EP94400211A 1993-02-04 1994-02-01 Verbindungsdurchführung für supraleitende Spule Expired - Lifetime EP0610131B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9301213A FR2701157B1 (fr) 1993-02-04 1993-02-04 Liaison d'alimentation pour bobine supraconductrice.
FR9301213 1993-02-04

Publications (2)

Publication Number Publication Date
EP0610131A1 EP0610131A1 (de) 1994-08-10
EP0610131B1 true EP0610131B1 (de) 1997-07-16

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EP94400211A Expired - Lifetime EP0610131B1 (de) 1993-02-04 1994-02-01 Verbindungsdurchführung für supraleitende Spule

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Country Link
US (1) US5436606A (de)
EP (1) EP0610131B1 (de)
AT (1) ATE155607T1 (de)
DE (1) DE69404178T2 (de)
ES (1) ES2104293T3 (de)
FR (1) FR2701157B1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2725827B1 (fr) * 1994-10-12 1996-12-20 Gec Alsthom T & D Sa Bobinage supraconducteur a haute tension et courant eleve, et limiteur de courant muni d'un tel bobinage
FR2729501A1 (fr) * 1995-01-17 1996-07-19 Gec Alsthom Electromec Amenee de courant haute tension entre une installation supraconductrice btc et une extremite de connexion a temperature ambiante d'un cable haute tension
DE19704485C2 (de) * 1997-02-07 1998-11-19 Siemens Ag Stromzuführungsvorrichtung für eine gekühlte elektrische Einrichtung
US6005461A (en) * 1998-06-18 1999-12-21 Intermagnetics General Corporation Method and apparatus for connecting high current ramping leads to a superconducting magnet
US6324851B1 (en) 1999-12-09 2001-12-04 Abb Power T&D Company Inc. Cryostat for use with a superconducting transformer
DK1865516T3 (da) * 2006-06-07 2013-04-29 Nexans System med et kabel med superledningsevne
DE102007013350B4 (de) * 2007-03-16 2013-01-31 Bruker Biospin Ag Stromzuführung mit Hochtemperatursupraleitern für supraleitende Magnete in einem Kryostaten
JP4790752B2 (ja) * 2008-04-28 2011-10-12 株式会社日立製作所 超電導マグネット
US8467158B2 (en) * 2009-06-26 2013-06-18 Varian Semiconductor Equipment Associates, Inc. Technique for limiting transmission of fault current
DE102010007087A1 (de) * 2010-02-06 2011-08-11 Karlsruher Institut für Technologie, 76131 Vorrichtung zur Strombegrenzung mit einer veränderbaren Spulenimpedanz
US8739396B2 (en) * 2010-06-17 2014-06-03 Varian Semiconductor Equipment Associates, Inc. Technique for limiting transmission of fault current
EP3121860B1 (de) * 2015-07-21 2020-11-25 Nexans Anordnung zur strombegrenzung in einem der stromversorgung dienenden netzwerk

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5670614A (en) * 1979-11-15 1981-06-12 Toshiba Corp Current supply device
US4438367A (en) * 1981-12-30 1984-03-20 The United States Of America As Represented By The United States Department Of Energy High power radio frequency attenuation device
US4509030A (en) * 1984-07-05 1985-04-02 General Electric Company Correction coil assembly for NMR magnets
JP2515813B2 (ja) * 1987-08-14 1996-07-10 株式会社日立製作所 超電導機器用電流リ−ド
JPH01286729A (ja) * 1988-05-12 1989-11-17 Toshiba Corp 超電導機器
FR2637728A1 (fr) * 1988-10-11 1990-04-13 Alsthom Gec Amenee de courant cryogenique a faibles pertes
JPH02280304A (ja) * 1989-04-21 1990-11-16 Sumitomo Heavy Ind Ltd 超電導装置
EP0401420A1 (de) * 1989-06-05 1990-12-12 Siemens Aktiengesellschaft HF-Abschirmvorrichtung in einem Dewar-Gefäss für eine supraleitende Magnetometer-Einrichtung
JP2767927B2 (ja) * 1989-10-04 1998-06-25 住友電気工業株式会社 超電導マグネット装置
FR2657728B1 (fr) * 1990-01-29 1996-12-13 Alsthom Gec Conducteur supraconducteur protege des transitions partielles.
JP2971176B2 (ja) * 1991-05-20 1999-11-02 三菱重工業株式会社 超伝導コイルの接続方法
FR2678420B1 (fr) * 1991-06-27 1996-02-02 Alsthom Gec Structure pour amenee de courant destinee a une installation fonctionnant a tres basse temperature.

Also Published As

Publication number Publication date
US5436606A (en) 1995-07-25
ES2104293T3 (es) 1997-10-01
DE69404178D1 (de) 1997-08-21
FR2701157B1 (fr) 1995-03-31
FR2701157A1 (fr) 1994-08-05
EP0610131A1 (de) 1994-08-10
ATE155607T1 (de) 1997-08-15
DE69404178T2 (de) 1997-10-30

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