GB2158309A - Apparatus for protecting superconductive device - Google Patents

Apparatus for protecting superconductive device

Info

Publication number
GB2158309A
GB2158309A GB08513695A GB8513695A GB2158309A GB 2158309 A GB2158309 A GB 2158309A GB 08513695 A GB08513695 A GB 08513695A GB 8513695 A GB8513695 A GB 8513695A GB 2158309 A GB2158309 A GB 2158309A
Authority
GB
United Kingdom
Prior art keywords
superconductive
protecting
superconductive device
current switch
diode circuit
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.)
Granted
Application number
GB08513695A
Other versions
GB8513695D0 (en
GB2158309B (en
Inventor
Tadatoshi Yamada
Syunji Yamamoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of GB8513695D0 publication Critical patent/GB8513695D0/en
Publication of GB2158309A publication Critical patent/GB2158309A/en
Application granted granted Critical
Publication of GB2158309B publication Critical patent/GB2158309B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/006—Supplying energising or de-energising current; Flux pumps
    • H01F6/008—Electric circuit arrangements for energising superconductive electromagnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/001—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for superconducting apparatus, e.g. coils, lines, machines
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Abstract

A diode circuit (9) is parallel-connected to a permanent current switch (2) in a superconductive device and is placed in a cryogenic state. The turn-on voltage of the diode circuit (9) is selected such as to be higher than the exciting voltage of a superconductive coil (1). This arrangement makes it possible to reduce the time required for excitation of the superconductive coil (1) and to effectively prevent any damage due to the superconductive breakdown of the permanent current switch (2). The invention can be utilized as an apparatus for protecting a superconductive device constituting an NMR-CT, for example.
GB08513695A 1983-10-19 1984-10-18 Apparatus for protecting superconductive device Expired GB2158309B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58196452A JPS6086808A (en) 1983-10-19 1983-10-19 Protective device for superconducting device
PCT/JP1984/000491 WO1985001829A1 (en) 1983-10-19 1984-10-18 Apparatus for protecting superconductive device

Publications (3)

Publication Number Publication Date
GB8513695D0 GB8513695D0 (en) 1985-07-03
GB2158309A true GB2158309A (en) 1985-11-06
GB2158309B GB2158309B (en) 1987-02-11

Family

ID=16358043

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08513695A Expired GB2158309B (en) 1983-10-19 1984-10-18 Apparatus for protecting superconductive device

Country Status (4)

Country Link
JP (1) JPS6086808A (en)
DE (2) DE3490474C2 (en)
GB (1) GB2158309B (en)
WO (1) WO1985001829A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2636477A1 (en) * 1988-09-12 1990-03-16 Alsthom Gec Cryogenic current limiter
DE3891385T1 (en) * 1988-09-08 1990-08-30 Mitsubishi Electric Corp SUPRALOWING MAGNETIC DEVICE
US5686877A (en) * 1994-11-22 1997-11-11 Bruker-Analytische Messtechnik Gmbh Apparatus and method for the rapid discharge of superconducting magnet coil
GB2447183B (en) * 2006-01-06 2010-10-27 Quantum Design Inc A magnet system, a switch for use with a superconducting magnet and a method for generating magnetic fields

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101649291B1 (en) * 2014-10-20 2016-08-18 고려대학교 산학협력단 Superconducting coils using partial insulation winding technique and manufacturing method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4814158B1 (en) * 1968-08-31 1973-05-04
JPS4945632B1 (en) * 1966-04-19 1974-12-05

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117264Y2 (en) * 1977-07-13 1986-05-27

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4945632B1 (en) * 1966-04-19 1974-12-05
JPS4814158B1 (en) * 1968-08-31 1973-05-04

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3891385T1 (en) * 1988-09-08 1990-08-30 Mitsubishi Electric Corp SUPRALOWING MAGNETIC DEVICE
FR2636477A1 (en) * 1988-09-12 1990-03-16 Alsthom Gec Cryogenic current limiter
US5686877A (en) * 1994-11-22 1997-11-11 Bruker-Analytische Messtechnik Gmbh Apparatus and method for the rapid discharge of superconducting magnet coil
US5847633A (en) * 1994-11-22 1998-12-08 Bruker Analytische Messtechnik Gmbh Apparatus and method for the rapid discharge of a superconducting magnet coil
GB2447183B (en) * 2006-01-06 2010-10-27 Quantum Design Inc A magnet system, a switch for use with a superconducting magnet and a method for generating magnetic fields

Also Published As

Publication number Publication date
JPS6353682B2 (en) 1988-10-25
DE3490474T (en) 1985-11-28
GB8513695D0 (en) 1985-07-03
GB2158309B (en) 1987-02-11
WO1985001829A1 (en) 1985-04-25
JPS6086808A (en) 1985-05-16
DE3490474C2 (en) 1989-10-05

Similar Documents

Publication Publication Date Title
ES2037970T3 (en) STATIC UNLOCKER WHICH HAS A INSTANT UNLOCKING INDEPENDENT FROM THE SUPPLY VOLTAGE.
SE8704371L (en) SWITCHING DEVICE FOR A PROTECTIVE DEVICE
EP0546377A3 (en) Semiconductor device with improved breakdown voltage characteristics
MX148571A (en) IMPROVEMENTS IN SWITCH FOR AN ELECTRICAL CURRENT DISTRIBUTION SYSTEM WITH DIGITAL TRIP UNIT AND POWER SOURCE FOR THE SAME
DE59306387D1 (en) Circuit arrangement for power semiconductor components
ATE178438T1 (en) ADJUSTABLE REACTANCE APPARATUS AND METHOD
GB2158309A (en) Apparatus for protecting superconductive device
JPS55144726A (en) Circuit for protecting component member against overcurrent due to magnetic saturation of inductance
DE3460570D1 (en) Voltage regulator with phase voltage holding and excitation short circuit protection for alternator
BR9205544A (en) Method and apparatus for monitoring the operational characteristics of electrical power switching semiconductor circuits
DE3369594D1 (en) Permanent current switch for short-circuiting at least one superconducting magnet winding
ATE23233T1 (en) TRANSFORMER, ESPECIALLY FOR DOWN-TRANSFORMING VOLTAGES FOR ELECTRIC WELDING MACHINE.
JPS538716A (en) Protective device of motor sewing machine
GB2126446B (en) High voltage protection for an output circuit
SU826431A1 (en) Electromagnetic contactor control device
SU137576A1 (en) Sensor to protect mechanical rectifiers from direct current
JPS5656178A (en) Inverter device
GB8400054D0 (en) Electric motors and dynamos
RU93029156A (en) DEVICE FOR PROTECTION AGAINST SHORT CIRCUITS OF ELECTRODES
JPS649605A (en) Superconducting coil apparatus
ATE28112T1 (en) RESIDUAL CIRCUIT BREAKER.
KR920017186U (en) Current limiting device for low voltage circuit breakers
BG47182A1 (en) Device for modifying of magnetomotive voltage of direct current motor with parallel excitation
JPS5669810A (en) Exciter of superconductive coil
JPS5446500A (en) Detector for abnormality of apparatus

Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 19960611

PE20 Patent expired after termination of 20 years

Effective date: 20041017