EP0107830B1 - Commutateur à courant permanent destiné à court-circuiter au moins un enroulement d'aimant supraconducteur - Google Patents

Commutateur à courant permanent destiné à court-circuiter au moins un enroulement d'aimant supraconducteur Download PDF

Info

Publication number
EP0107830B1
EP0107830B1 EP83110191A EP83110191A EP0107830B1 EP 0107830 B1 EP0107830 B1 EP 0107830B1 EP 83110191 A EP83110191 A EP 83110191A EP 83110191 A EP83110191 A EP 83110191A EP 0107830 B1 EP0107830 B1 EP 0107830B1
Authority
EP
European Patent Office
Prior art keywords
conductor
current switch
pieces
contact piece
contact
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
Application number
EP83110191A
Other languages
German (de)
English (en)
Other versions
EP0107830A1 (fr
Inventor
Holger Franksen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0107830A1 publication Critical patent/EP0107830A1/fr
Application granted granted Critical
Publication of EP0107830B1 publication Critical patent/EP0107830B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/002—Very heavy-current switches
    • H01H33/004—Very heavy-current switches making use of superconducting contacts

Definitions

  • the invention relates to a continuous current switch for short-circuiting at least one superconducting magnetic winding with at least two contact pieces, each having a plurality of superconducting conductor pieces, which are arranged in parallel with one another and connected to a carrier element, and are cooled by a cryogenic coolant, and with an actuating device for joining the superconducting conductor pieces together with a predetermined contact force.
  • a corresponding permanent current switch is known from DE-A-2 521 328.
  • the magnetic winding can therefore be short-circuited at its ends by means of a low-resistance permanent current switch. The current then flows almost undamped in the short-circuited circuit thus formed, and the power supply required to excite the magnet winding can thus be interrupted.
  • the known continuous current switch contains two contact pieces, each of which has a carrier element made of normally conducting material as a matrix, in which superconducting conductor pieces arranged parallel to one another are embedded.
  • a mechanical actuation device required for opening and closing the switch is designed such that the superconducting conductor pieces of the two contact pieces and their normally conductive parts can be joined together.
  • the contact surfaces are held indirectly by a cryogenic coolant at the operating temperature of the superconducting conductor pieces, since they are arranged in a vacuum chamber in order to be able to exclude contamination of the surfaces.
  • the surface of one contact piece is curved, while the other contact piece can have, for example, a flat or a concave surface.
  • a relatively high contact force is required in addition to an exact guidance of the contact pieces.
  • reproducible resistances in the order of magnitude of 10- 9 ⁇ or even less cannot be easily guaranteed.
  • Resistors of this type are required in particular for superconducting large magnets, such as are to be provided for devices for nuclear fusion or for nuclear spin tomography, for example.
  • This requirement cannot be met with the superconducting contact device known from US-A-3096421.
  • This contact device has two contact pieces with superconducting conductor pieces. In this case, only a single wire-shaped conductor piece is to be fastened to the first contact piece, while the second contact piece, which is designed to be movable, comprises three bow-like conductor pieces which are aligned perpendicularly with respect to the individual conductor piece of the first contact piece and are pressed onto the single conductor piece by means of springs. These bow-shaped conductor pieces of the second contact piece are not connected in parallel, so that in each case only a single contact point between two wires forms a contact.
  • the contact device constructed in this way should be part of a network, for example a computer network.
  • the object of the present invention is therefore to improve the known continuous current switch in such a way that it can be used to easily obtain contact resistances in the order of magnitude mentioned.
  • This object is achieved according to the invention in that on each of the mutually facing surfaces of the contact pieces at least five parallel superconducting conductor pieces are arranged lying in at least largely parallel planes such that the conductor pieces of the first contact piece cross the conductor pieces of the further contact piece, and that the conductor pieces of the first contact piece are firmly attached to the surface of the corresponding support element, while each conductor piece of the further contact piece is held on the associated support element at least above each crossing point with the conductor pieces of the first contact piece by means of a resilient support device.
  • FIGS. 1 and 2 each schematically illustrate a section through an exemplary embodiment of a continuous current switch according to the invention.
  • the continuous current switch indicated in a cross section in FIG. 1 contains two contact pieces 2 and 3 which can be moved or joined together by means of an actuating device which is not shown in the figure.
  • the first contact piece 2 is arranged stationary, while the further, movably designed contact piece 3 can be pressed against the stationary contact piece 2 by means of the actuating device with an actuating force F represented by an arrow.
  • the two contact pieces 2 and 3 are each electrically conductively connected to the ends of the conductors of at least one superconducting magnet winding (not shown in the figure) or directly represent the conductor ends of this winding.
  • the magnet windings can be, for example, the windings of a magnet system for generating the magnetic Basic field of a system for nuclear spin tomography or the winding of a magnet of a nuclear fusion system.
  • The, for example, stationary contact piece 2 contains a flat contact plate 4, on the surface of which faces the movable contact piece 3, a large number of superconducting conductor pieces 5 aligned in parallel with one another is mechanically fixed.
  • at least five superconducting conductor pieces 5 are soldered onto the contact plate 4 which serves as the carrier element.
  • the contact plate 4 advantageously consists of an electrically highly conductive material which is normally conductive at the operating temperature of the superconducting conductor pieces 5, e.g. made of copper or aluminum.
  • the superconducting conductor pieces e.g. have a round or rectangular cross section, it can in particular be a so-called high-current superconductor.
  • These conductor pieces can be both unstabilized and stabilized with normally conductive material, with superconducting conductor parts of these conductor pieces preferably coming to rest at least on the surface side facing the movable contact piece 3.
  • the movable contact piece 3 also contains a large number of individual superconducting conductor pieces 6 aligned parallel to one another. These conductor pieces are arranged transversely with respect to the conductor pieces 5 of the stationary contact piece 2, so that when the conductor pieces 5 and 6 of the two contact pieces 2 are joined together and 3 result in a multiplicity of crossing or contact points 7.
  • the conductor pieces 6 should not be rigidly attached to a movable contact plate 8 connected to the actuating device, corresponding to the conductor pieces 5; rather, a resilient support of the conductor pieces 6 is provided with respect to their contact plate 8 serving as a carrier element.
  • each conductor piece 6 is fastened to the movable contact plate 8 in the areas of its crossing points 7 with each conductor piece 5 of the stationary contact piece 2 via a corresponding support device 9, which also serves to guide and hold the conductor pieces 6.
  • This support device 9 contains a guide rod 11 projecting through a corresponding bore 10 in the contact plate 8, which is attached at one end to the corresponding superconducting conductor piece 6 by means of, for example, a disc-shaped connecting element 12 and which is prevented from slipping out by a stop 13 at its opposite end is secured from the bore 10.
  • a spring 14 enclosing the respective guide rod 11 is clamped with a predetermined spring force.
  • the superconducting conductor pieces 5 and 6 can be arranged directly in a cryogenic medium which ensures their superconductivity, which is in particular the cooling medium of the connected superconducting magnet winding. If necessary, indirect cooling of these conductor sections is also possible (cf. DE-A-2 521 328).
  • the relatively low actuating force F of the continuous current switch not only permits the actuation assumed in FIG. 1 by means of a linkage, but also a pneumatic or hydraulic actuation is possible. Such actuation is known per se (DE-C-2324371).
  • a corresponding exemplary embodiment is indicated in FIG. 2 as a cross section. It is assumed that one of the contact pieces is stationary and corresponds to the contact piece 2 with conductor pieces 5 according to FIG. 1.
  • a large number of superconducting conductor pieces 16 of a further contact piece, designated 17, of this switch is mechanically connected to a stationary, plate-shaped carrier element 19 via a pneumatic or hydraulic support device 18.
  • the support device 18 contains a thin, flat membrane 20 which e.g.
  • This membrane 20 consists of stainless steel and to which the conductor pieces 16 are rigidly attached according to the arrangement of Figure 1.
  • This membrane 20 is fastened to the stationary support element 19 via a bellows 21.
  • the interior 22, which is enclosed by this carrier element 19, the bellows 21 and the membrane 20 holding the conductor pieces 16 in a vacuum-tight manner, can be pressurized via a pressure line 23, so that the conductor pieces 16 have approximately the same contact force K on the conductor pieces 5 arranged transversely to them Contact piece 2 are pressed.
  • gaseous or liquid helium can in particular be provided as the pressure medium.
  • the continuous current switch according to the invention can be provided particularly advantageously for magnetic windings which are wound with superconducting conductor cables made of several superconducting individual conductors.
  • the superconducting individual conductors can form the superconductor pieces of the contact pieces directly from the fanned-out conductor cable.
  • the continuous current switch according to the invention has only two flat contact pieces with conductor pieces to be joined together, the conductor pieces being cushioned on one level above each crossing or contact point.
  • the continuous current switch according to the invention can equally well have more than two levels with line pieces, with resilient support of the conductor pieces being provided for every second level.

Landscapes

  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Claims (9)

1. Commutateur à courant persistent pour court-circuiter au moins un enroulement d'électroaimant supraconducteur, comprenant au moins deux plots de contact (2, 3; 2, 17) qui présentent chacun plusieurs pièces conductrices à supraconduction (5, 6; 5, 16) disposées parallèlement les unes aux autres et reliées à un élément du support (4, 8; 19), et refroidies par un fluide de refroidissement cryogène, ainsi qu'un dispositif d'actionnement pour joindre les pièces conductrices à supraconduction (5, 6; 5, 16) avec une force de contact préfixée, caractérisé en ce que
a) au moins cinq pièces conductrices à supraconduction (5, 6; 5, 16) branchées en parallèle, sont disposées sur chacune des surfaces dirigées l'une vers l'autre des plots de contact (2, 3; 2, 17), dans des plans parallèles, dans une large mesure au moins, de manière que les pièces conductrices (5) du premier plot de contact (2) croisent les pièces conductrices (6, 16) du plot de contact supplémentaire (3,17), et que
b) en outre, les pièces conductrices (5) du premier plot de contact (2) sont disposées fixes sur la surface de l'élément de support (4) correspondant, tandis que chaque pièce conductrice (6; 16) du plot de contact supplémentaire (3; 17) est maintenue sur l'élément de support (8; 19), au moins en regard de chaque point de croisement (7) avec les pièces conductrices (5) du premier plot de contact (2), au moyen d'un dispositif d'appui (9; 18) élastique.
2. Commutateur selon la revendication 1, caractérisé en ce que le dispositif d'appui élastique (9) contient une tringlerie de guidage et de maintien (11 à 13), reliée à l'élément de support (8) du plot de contact supplémentaire (3), et un ressort (14) bandé entre la pièce conductrice (6) correspondante et l'élément de support (8).
3. Commutateur selon la revendication 1, caractérisé en ce que le dispositif d'appui élastique (18) contient un soufflet à ressort (21), relié à l'élément de support (19) du plot de contact supplémentaire (17), et un diaphragme (20), auquel sont fixées les pièces conductrices (16) du plot de contact supplémentaire (17), et que l'espace intérieur (22) renfermé par l'élément de support (19), le soufflet à ressort (21) et le diaphragme (20) peut être mis sous pression par un fluide de refroidissement gazeux ou liquide.
4. Commutateur selon la revendication 3, caractérisé par un diaphragme (20) mince en acier spécial.
5. Commutateur selon la revendication 3 ou 4, caractérisé en ce que le fluide de mise sous pression est le fluide de refroidissement pour refroidir l'enroulement d'électroaimant supraconducteur.
6. Commutateur selon une des revendications 1 à 5, caractérisé en ce que les pièces conductrices (5, 6; 5, 16) sont en matériau supraconducteur non stabilisé.
7. Commutateur selon une des revendications 1 à 5, caractérisé en ce que les pièces conductrices (5, 6; 5, 16) sont des conducteurs stabilisés à un brin ou à multiples brins.
8. Commutateur selon la revendication 7, caractérisé en ce que les pièces conductrices (5, 6; 5, 16) présentent du matériau supraconducteur, au moins sur leurs parties de surfaces dirigées l'une vers l'autre.
9. Commutateur selon une des revendications 1 à 8, caractérisé en ce que les pièces conductrices (5, 6; 5, 16) des plots de contact (2, 3; 2, 17) sont placées dans une chambre à vide.
EP83110191A 1982-10-28 1983-10-12 Commutateur à courant permanent destiné à court-circuiter au moins un enroulement d'aimant supraconducteur Expired EP0107830B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823240019 DE3240019A1 (de) 1982-10-28 1982-10-28 Dauerstromschalter zum kurzschliessen mindestens einer supraleitenden magnetwicklung
DE3240019 1982-10-28

Publications (2)

Publication Number Publication Date
EP0107830A1 EP0107830A1 (fr) 1984-05-09
EP0107830B1 true EP0107830B1 (fr) 1987-01-28

Family

ID=6176870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110191A Expired EP0107830B1 (fr) 1982-10-28 1983-10-12 Commutateur à courant permanent destiné à court-circuiter au moins un enroulement d'aimant supraconducteur

Country Status (4)

Country Link
US (1) US4623769A (fr)
EP (1) EP0107830B1 (fr)
JP (1) JPS5994889A (fr)
DE (2) DE3240019A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3402828A1 (de) * 1984-01-27 1985-08-01 Siemens AG, 1000 Berlin und 8000 München Schalteinrichtung zum kurzschliessen mindestens einer supraleitenden magnetwicklung
US4872322A (en) * 1988-09-02 1989-10-10 General Electric Company Power operated contact apparatus for superconductive circuit
JP2549137Y2 (ja) * 1991-11-06 1997-09-30 和江 三木 わきの下に貼る汗取りパッド
US8384504B2 (en) * 2006-01-06 2013-02-26 Quantum Design International, Inc. Superconducting quick switch
US8134434B2 (en) * 2007-01-05 2012-03-13 Quantum Design, Inc. Superconducting quick switch
KR101406947B1 (ko) * 2011-10-11 2014-06-12 삼성전자주식회사 초전도 자석 장치 및 그 제어방법

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096421A (en) * 1958-04-16 1963-07-02 Walter G Finch Superconducting contact devices
US3349209A (en) * 1966-04-26 1967-10-24 Avco Corp Cryogenic switch
SE323735B (fr) 1967-06-05 1970-05-11 Uddeholms Ab
US4024363A (en) 1973-05-14 1977-05-17 Siemens Aktiengesellschaft Shorting contacts for closing a superconducting current path operated by a bellows arrangement responsive to the pressure of a cryogenic medium used in cooling the contacts
JPS5533579B2 (fr) 1974-05-15 1980-09-01
JPS5132480A (fr) * 1974-09-13 1976-03-19 Mitsubishi Electric Corp
DE2707589C3 (de) * 1977-02-22 1980-02-21 Siemens Ag, 1000 Berlin Und 8000 Muenchen Dauerstromschalter zum Kurzschließen eines supraleitenden Magneten
US4239979A (en) 1977-05-12 1980-12-16 Compagnie Generale Des Etablissements Michelin Membrane contactor
GB2102705A (en) 1981-03-24 1983-02-09 Standard Telephones Cables Ltd Electrical contact
US4385215A (en) 1981-11-09 1983-05-24 Eeco Incorporated Thin-membrane switch

Also Published As

Publication number Publication date
JPS5994889A (ja) 1984-05-31
DE3240019A1 (de) 1984-05-03
EP0107830A1 (fr) 1984-05-09
US4623769A (en) 1986-11-18
DE3369594D1 (en) 1987-03-05

Similar Documents

Publication Publication Date Title
DE69333128T2 (de) Stromzuleitung für supraleitendes Magnetsystem ohne flüssiges Helium
EP2228806B1 (fr) Limiteur de courant
CH638926A5 (de) Vakuumschalter mit magnetspule.
DE3618145C2 (fr)
EP0154779A1 (fr) Système supraconducteur magnétique pour le fonctionnement à 13K
DE2521328A1 (de) Schalter
DE1932379B2 (de) Spule mit veraenderlicher induktivitaet als strombegrenzungseinrichtung fuer energieuebertragungsanlagen
EP0107830B1 (fr) Commutateur à courant permanent destiné à court-circuiter au moins un enroulement d'aimant supraconducteur
DE69114344T2 (de) Schalter zur Kontrolle des Stromflusses in Supraleitern.
EP0150361A2 (fr) Dispositif interrupteur pour le court-circuitage d'un enroulement super-conducteur
DE2707589C3 (de) Dauerstromschalter zum Kurzschließen eines supraleitenden Magneten
DE69402610T2 (de) Supraleitender Schalter und Anwendung als Speisung einer supraleitenden Spule
DE2643217C2 (de) Supraleiter
DE3048418A1 (de) Kabelfoermiger, kryogen stabilisierter supraleiter fuer hohe stroeme und wechselfeldbelastungen
DE1490527B1 (de) Haltevorrichtung fuer schaltungsbausteine
DE3875473T2 (de) Supraleitende schaltungseinrichtung.
DE4030413A1 (de) Kurzschlussstrombegrenzer
DE2709363C3 (de) Vakuumschalter
DE3606076A1 (de) Spannungsbegrenzender widerstand, insbesondere fuer einen trennschalter einer freiluft-hochspannungsschaltanlage
DE2830736B1 (de) Hochspannungskabel
DE3150294C2 (de) Kontakteinrichtung zum widerstandsarmen Verbinden der Endstücke zweier Hochstr om-Supraleiter
DE3800582C2 (de) Überstromauslöser für elektrische Schutzschaltgeräte
DE1162406B (de) Kryotronanordnung mit zwei in geringem Abstand voneinander sich kreuzenden oder parallel zueinander verlaufenden duennen Leiterstreifen
DE2056287B2 (de) Supraleitungsmagnetspule mit einer zwei- oder mehrpoligen Wicklung
DE1241886B (de) Klemmvorrichtung zum Verbinden zweier Drahtenden, von denen wenigstens eines ein harter Supraleiter ist

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB LI NL SE

17P Request for examination filed

Effective date: 19840626

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI NL SE

REF Corresponds to:

Ref document number: 3369594

Country of ref document: DE

Date of ref document: 19870305

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19871031

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19881013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19881031

Ref country code: CH

Effective date: 19881031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19890501

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19890630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19890701

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83110191.0

Effective date: 19890619