WO2005010902A1 - Limiteur de courant - Google Patents

Limiteur de courant Download PDF

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Publication number
WO2005010902A1
WO2005010902A1 PCT/JP2003/009396 JP0309396W WO2005010902A1 WO 2005010902 A1 WO2005010902 A1 WO 2005010902A1 JP 0309396 W JP0309396 W JP 0309396W WO 2005010902 A1 WO2005010902 A1 WO 2005010902A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnets
current limiter
cores
magnetic
spacer
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.)
Ceased
Application number
PCT/JP2003/009396
Other languages
English (en)
Japanese (ja)
Inventor
Kazufumi Hayashi
Masahiro Ishikawa
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
Priority to PCT/JP2003/009396 priority Critical patent/WO2005010902A1/fr
Priority to TW092123120A priority patent/TW200505126A/zh
Publication of WO2005010902A1 publication Critical patent/WO2005010902A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/02—Adaptations of transformers or inductances for specific applications or functions for non-linear operation
    • H01F38/023—Adaptations of transformers or inductances for specific applications or functions for non-linear operation of inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F2003/103—Magnetic circuits with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/021—Current limitation using saturable reactors

Definitions

  • the present invention relates to a current limiter for limiting an overcurrent generated due to a short circuit accident in an electric circuit.
  • the current limiter disclosed in Japanese Patent Application Laid-Open Publication No. 2002-118896 includes a first and a second core facing each other, and a joint between the first and the second core. And a first permanent magnet and a second permanent magnet, which are spaced apart from each other to form a closed magnetic circuit, and a coil wound over the first and second iron cores.
  • two permanent magnets are generally fixed to two iron cores with an adhesive, and a space surrounded by the iron core and the permanent magnets is formed between the permanent magnets. .
  • an object of the present invention is to provide a current limiting device in which the size of the space between the permanent magnets does not change over a long period of time and the current limiting characteristics do not deteriorate. Disclosure of the invention
  • a current limiter comprises a first and second iron cores facing each other, and a joint between the first and second iron cores to constitute a closed magnetic circuit.
  • FIG. 1 is a perspective view of a current limiter according to an embodiment of the present invention.
  • FIG. 2 is a plan view of the current limiter of FIG.
  • FIG. 3 is a front view of the current limiter of FIG.
  • FIG. 4 is a perspective view of the current limiter of FIG.
  • FIG. 5 is a perspective view of a non-magnetic material spacer of a block body used in the current limiting device of FIG.
  • FIG. 6 is a perspective view showing a non-magnetic material spacer of the framework used in the current limiter of FIG.
  • FIG. 7 is a perspective view showing another non-magnetic spacer in a frame used in the current limiter of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • the current limiter of the present invention includes a first iron core 1 and a second iron core 2 having the same structure facing each other, and a first iron core 1 and a second iron core 2 There are provided a first permanent magnet 3 and a second permanent magnet 4 which are sandwiched and joined therebetween and cooperate with the first iron core 1 and the second iron core 2 to form a closed magnetic circuit.
  • the first and second cores 1 and 2 are soft magnetic cores for switching which sandwich the first and second permanent magnets 3 and 4, and these cores 3 and 4 are made of the same material and the same shape, respectively. It is composed of a laminated iron core such as silicon steel and permalloy (50 Ni-Fe) and a sintered magnetic core such as ferrite (Mn-Zn, Ni-Zn), and has a high magnetic permeability and It has good squareness.
  • the first and second permanent magnets 3 and 4 are rare earth magnets (Nd—Fe—
  • Permanent magnets of the same material and same shape composed of B-series, Sm-Co-series, ferrite magnets (Ba-series, Sr-series), extruded magnets (Mn-A-series), etc. It has magnetic properties with large coercive force and residual magnetic flux density.
  • First and second permanent magnets composed of B-series, Sm-Co-series, ferrite magnets (Ba-series, Sr-series), extruded magnets (Mn-A-series), etc. It has magnetic properties with large coercive force and residual magnetic flux density.
  • the magnetization direction is the direction indicated by N and S in FIG. 2, and is a closed magnetic circuit composed of the first and second permanent magnets 1 and 2 and the first and second iron cores 1 and 2.
  • a return magnetic flux is generated.
  • the first and second iron cores 1 and 2 and the first and second permanent magnets 3 and 4 are joined by a suitable adhesive such as a resin adhesive.
  • the first and second iron cores 1 and 2 are separated from each other by a distance corresponding to the thickness of the permanent magnets 3 and 4, and the permanent magnet It is separated by the distance between 3 and 4, and is configured as a frame with an opening 5 in the center as a whole.
  • the current limiter further comprises a coil 6 wound on the first and second iron cores 1 and 2 on the framework assembly assembled as described above.
  • the coil 6 is a coil formed by winding a conductive wire of a low-resistance material such as copper.
  • the coil 6 is drawn as being wound directly around the first and second cores 1 and 2. This is for the sake of simplicity, and is not actually illustrated.
  • An appropriate known insulating layer or bobbin may be provided and wound thereon.
  • the current limiter of the present invention is further provided in the opening 5 of the closed magnetic circuit assembly, and the non-magnetic non-magnetic material for maintaining the distance between the first and second permanent magnets 3 and 4 constant. It has a spacer 7.
  • the non-magnetic spacer 7 may be a solid block as shown in FIG. 5, and such a block is a laminate of a relatively strong insulating resin material such as phenol resin. Can be manufactured.
  • the material that can be used as the non-magnetic spacer 7 may be a metal such as stainless steel, aluminum, or copper, in addition to various other resin materials.
  • the non-magnetic spacer 7 is fixed to at least one of the first and second cores 1 and 2 and the first and second permanent magnets 3 and 4 by an appropriate fixing means such as an adhesive.
  • an appropriate fixing means such as an adhesive.
  • Permanent magnets 3 and 4 are displaced with respect to the first and second cores 1 and 2. There are things like that.
  • the first and second cores 1 and 2 largely deviate from the saturation magnetization region, and the first and second cores 1 and 2 move in opposite directions. Since the magnetization is switched to the magnetic saturation region, the impedance (reactance) of the coil 6 increases. At this time, most of the power supply voltage is applied to the coil 6. Due to the principle of the saturable reactor, current is limited over the entire wave when a short circuit occurs.
  • FIG. 6 shows another non-magnetic spacer 8 that can be used in the current limiter of the present invention.
  • the non-magnetic spacer 8 is formed by combining a plurality of non-magnetic rod members 9 and joining them together to form a three-dimensional frame.
  • the non-magnetic spacer 8 is made of a resin material and has a lattice structure. It is formed in a shape.
  • an attractive force by electromagnetic force acts between the first and second permanent magnets 1 and 2.
  • the first and second permanent magnets 1 and 2 can maintain the initial structure.
  • the non-magnetic spacer 8 is a frame, a space can be provided inside the frame inside the current limiter, and the space can be used to radiate heat inside the current limiter. it can.
  • Still another non-magnetic spacer 10 shown in FIG. 7 is composed of two non-magnetic plate members 11 and an opening member 12 connecting the plate members 11 to each other. It is a letter-shaped resin frame.
  • the plate member 11 of the non-magnetic spacer 10 By disposing the plate member 11 of the non-magnetic spacer 10 in close contact with the first and second permanent magnets 1 and 2, a distance between the first and second permanent magnets 1 and 2 is increased.
  • the initial structure can be maintained by supporting the suction force of the acting electromagnetic force. Also, heat can be dissipated inside the current limiter by utilizing the space inside the current limiter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

Cette invention se rapporte à un limiteur de courant, qui comprend deux aimants permanents reliés entre eux par une paire d'induits opposés, tout en étant maintenus à distance l'un de l'autre, afin de former un circuit magnétique fermé, ainsi que des enroulements enroulés autour des induits, de façon à permettre la circulation du flux magnétique de saturation produit par les aimants permanents. Un élément d'espacement non magnétique est placé entre les deux aimants permanents, à proximité adjacente de ceux-ci, de telle sorte que cet élément d'espacement non magnétique produit une attraction électromagnétique agissant entre les aimants permanents de façon à les bloquer.
PCT/JP2003/009396 2003-07-24 2003-07-24 Limiteur de courant Ceased WO2005010902A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2003/009396 WO2005010902A1 (fr) 2003-07-24 2003-07-24 Limiteur de courant
TW092123120A TW200505126A (en) 2003-07-24 2003-08-22 Current limitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/009396 WO2005010902A1 (fr) 2003-07-24 2003-07-24 Limiteur de courant

Publications (1)

Publication Number Publication Date
WO2005010902A1 true WO2005010902A1 (fr) 2005-02-03

Family

ID=34090546

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/009396 Ceased WO2005010902A1 (fr) 2003-07-24 2003-07-24 Limiteur de courant

Country Status (2)

Country Link
TW (1) TW200505126A (fr)
WO (1) WO2005010902A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013237A1 (fr) * 2010-07-29 2012-02-02 Areva T&D Uk Limited Limiteur de courant
GB2491642A (en) * 2011-06-10 2012-12-12 Zenergy Power Pty Ltd Saturated core fault current limiter
US20130141202A1 (en) * 2010-08-03 2013-06-06 Alstom Technology Ltd Core

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56118313A (en) * 1980-02-22 1981-09-17 Denki Onkyo Co Ltd High-voltage transformer
JPS6315023U (fr) * 1986-07-16 1988-02-01
JPS6346818U (fr) * 1986-09-12 1988-03-30
JP2002118956A (ja) * 2000-10-03 2002-04-19 Mitsubishi Electric Corp 限流器
JP2003009386A (ja) * 2001-06-18 2003-01-10 Mitsubishi Electric Corp 限流器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56118313A (en) * 1980-02-22 1981-09-17 Denki Onkyo Co Ltd High-voltage transformer
JPS6315023U (fr) * 1986-07-16 1988-02-01
JPS6346818U (fr) * 1986-09-12 1988-03-30
JP2002118956A (ja) * 2000-10-03 2002-04-19 Mitsubishi Electric Corp 限流器
JP2003009386A (ja) * 2001-06-18 2003-01-10 Mitsubishi Electric Corp 限流器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013237A1 (fr) * 2010-07-29 2012-02-02 Areva T&D Uk Limited Limiteur de courant
US20130141202A1 (en) * 2010-08-03 2013-06-06 Alstom Technology Ltd Core
US9331475B2 (en) * 2010-08-03 2016-05-03 Alstom Technology Ltd. Core
GB2491642A (en) * 2011-06-10 2012-12-12 Zenergy Power Pty Ltd Saturated core fault current limiter

Also Published As

Publication number Publication date
TW200505126A (en) 2005-02-01

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