WO2005010902A1 - Current limiter - Google Patents

Current limiter 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
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WO
WIPO (PCT)
Prior art keywords
permanent magnets
current limiter
cores
magnetic
spacer
Prior art date
Application number
PCT/JP2003/009396
Other languages
French (fr)
Japanese (ja)
Inventor
Kazufumi Hayashi
Masahiro Ishikawa
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
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 Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to PCT/JP2003/009396 priority Critical patent/WO2005010902A1/en
Priority to TW092123120A priority patent/TW200505126A/en
Publication of WO2005010902A1 publication Critical patent/WO2005010902A1/en

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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.

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  • 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

A current limiter comprising two permanent magnets bonded between a pair of opposing cores while spaced apart from each other to form a closed magnetic circuit, and coils wound around the cores to circulate saturation magnetic flux being generated from the permanent magnets, wherein a nonmagnetic spacer is provided between the two permanent magnets closely thereto so that the nonmagnetic spacer bears an electromagnetic attraction acting between the permanent magnets to lock the permanent magnets.

Description

明 細 書 限流器 技術分野  Description Current limiter Technical field
この発明は電気回路の短絡事故等で発生する過電流を制限する限流器に関する ものである。 背景技術  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current limiter for limiting an overcurrent generated due to a short circuit accident in an electric circuit. Background art
特開 2 0 0 2— 1 1 8 9 5 6号公報に開示されている限流器は、 互いに対向し た第 1および第 2の鉄心と、 これらの第 1および第 2の鉄心間に接合されて互レ、 に離間して配置されて閉磁気回路を構成する第 1および第 2の永久磁石と、 第 1 および第 2の鉄心に跨って巻回されたコイルとを備えている。 このような閉磁気 回路においては、 2つの永久磁石は一般に 2つの鉄心に接着剤により固定されて 配置されており、 永久磁石の間には鉄心と永久磁石で囲まれた空間が形成されて いる。  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. In such a closed magnetic circuit, 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. .
このような限流器においては、 永久磁石間に磁力による非常に強い吸引力が働 くため、 鉄心と永久磁石との間の接合面に接着剤を用いていても、 経年的には永 久磁石が互いに引き寄せられてしまうことがあり、 初期の構造が維持できなくな り、 限流性能の低下の原因となっていた。  In such a current limiter, a very strong attractive force acts between the permanent magnets due to the magnetic force. The magnets could be attracted to each other, making it impossible to maintain the initial structure and causing a reduction in current limiting performance.
従って、 この発明の目的は、 長い期間にわたっても永久磁石間の空間の寸法が 変化することなく、 限流特性を劣化させることがない限流装置を提供することで ある。 発明の開示  Accordingly, 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
上述の目的を達成するために、 この発明の限流器は、 互いに対向した第 1およ び第 2の鉄心と、 この第 1および第 2の鉄心間に接合されて閉磁気回路を構成す る第 1および第 2の永久磁石と、 上記第 1および第 2の鉄心に跨つて卷回された コイルと、 上記第 1および第 2の永久磁石間に設けられた非磁性体スぺーサとを 備えたことを特徴とする限流器である。 図面の簡単な説明 In order to achieve the above object, a current limiter according to the present invention 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. First and second permanent magnets, a coil wound over the first and second iron cores, and a non-magnetic spacer provided between the first and second permanent magnets. To A current limiter characterized by comprising: Brief Description of Drawings
図 1はこの発明の一実施例による限流器の斜視図である。  FIG. 1 is a perspective view of a current limiter according to an embodiment of the present invention.
図 2は図 1の限流器の平面図である。  FIG. 2 is a plan view of the current limiter of FIG.
図 3は図 1の限流器の正面図である。  FIG. 3 is a front view of the current limiter of FIG.
図 4は図 1の限流器の斜視図である。  FIG. 4 is a perspective view of the current limiter of FIG.
図 5は図 1の限流器に用いるプロック体の非磁性体スぺーサの斜視図である。 図 6は図 1の限流器に用いる枠組体の非磁性体スぺーサを示す斜視図である。 図 7は図 1の限流器に用いる別の枠組体の非磁性体スぺーサを示す斜視図であ る。 発明を実施するための最良の形態  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
実施の形態 1 . Embodiment 1
この発明の限流器は、 図 1に示してあるように、 互いに対向した同じ構造の第 1の鉄心 1および第 2の鉄心 2と、 これらの第 1の鉄心 1および第 2の鉄心 2の 間に挟持されて接合され、 第 1の鉄心 1および第 2の鉄心 2と協働して閉磁気回 路を構成する第 1の永久磁石 3および第 2の永久磁石 4とを備えている。  As shown in FIG. 1, 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.
第 1および第 2の鉄心 1および 2は、 第 1および第 2の永久磁石 3および 4を 挾持するスィツチング用の軟質磁芯で、 これらの鉄心 3および 4は各々同材質、 同形状の方向性珪素鋼、 パーマロイ （5 0 N i—F e ) 等の積層鉄心、 フェライ ト （M n— Z n、 N i—Z n ) 等の焼結磁芯から構成されており、 高透磁率、 且 つ、 角形性のよいものである。  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.
第 1および第 2の永久磁石 3および 4は、 それぞれ希土類磁石 （N d— F e— The first and second permanent magnets 3 and 4 are rare earth magnets (Nd—Fe—
B系、 S m— C o系） 、 フェライ ト磁石 （B a系、 S r系） 、 押し出し磁石 （M n— A】系） 等から構成された同材質、 同形状の角柱状の永久磁石で、 保磁力、 残留磁束密度の大きい磁気特性を有するものである。 第 1および第 2の永久磁石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
3および 4は第 1および第 2の鉄心 1および 2が接合される面に垂直の方向に着 磁されている。 その着磁方向は、 図 2に Nおよび Sによって示す方向であり、 第 1および第 2の永久磁石 1および 2と第 1および第 2の鉄心 1および 2とから構 成された閉磁気回路に還流磁束が発生するようになっている。 第 1および第 2の 鉄心 1および 2と第 1および第 2の永久磁石 3および 4との間は、 例えば樹脂接 着剤等の適当な接着剤により接合されている。 このように組み立てられた鉄心と 磁石との組立体は、 第 1および第 2の鉄心 1および 2の間は永久磁石 3および 4 の厚さに相当する距離だけ互いに離間しており、 また永久磁石 3および 4の間の 距離だけ離間していて、 全体として中央部に開口 5のある枠組状に構成されてい る。 3 and 4 are attached perpendicular to the plane where the first and second cores 1 and 2 are joined. Magnetized. 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. In the assembly of the iron core and the magnet assembled in this manner, 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.
限流器は更に上述のように組み立てられた枠組状の組立体上で第 1および第 2 の鉄心 1におよび 2に跨って卷回されたコイル 6を備えている。 コイル 6は銅等 の低抵抗材の導線を巻回して構成されたコイルである。 図示の例ではコイル 6は 第 1および第 2の鉄心 1および 2の周囲に直接巻かれているように描かれている 力 これは説明を簡単にするためであって、 実際には図示はしてない公知の適当 な絶縁層あるいはボビンを設けてその上に卷回することができる。  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. In the illustrated example, 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.
この発明の限流器は更に、 閉磁気回路組立体の開口 5内に設けられて、 第 1お よび第 2の永久磁石 3及び 4間の距離を一定に維持する非磁性体の非磁性体スぺ ーサ 7を備えている。 非磁性体スぺーサ 7は、 図 5に示すような中実のブロック 体のものでもよく、 このようなブロック体は例えばフエノール樹脂等の比較的強 度の高い絶縁性樹脂材料の積層体で製作することができる。 また、 非磁性体スぺ ーサ 7として使用できる材料はその他の様々な樹脂材料の他、 ステンレス鋼、 ァ ルミニゥムおよび銅等の金属でも良い。 非磁性体スぺーサ 7は接着剤等の適当な 固着手段によって第 1および第 2の鉄心 1および 2ならびに第 1および第 2の永 久磁石 3および 4の少なくともいずれか一つに固着する。 このような非磁性体ス ぺーサ 7を第 1および第 2の永久磁石 3および 4に密着させて配置することによ り、 第 1および第 2の永久磁石 3および 4間に電磁吸引力が働いても、 電磁吸引 力を非磁性体スぺーサ 7によって支持することができるので、 第 1および第 2の 永久磁石 3および 4は所期の間隔を維持することができる。 また、 第 1および第 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. By disposing such a non-magnetic material spacer 7 in close contact with the first and second permanent magnets 3 and 4, an electromagnetic attraction force is generated between the first and second permanent magnets 3 and 4. Even when working, the electromagnetic attraction can be supported by the non-magnetic spacer 7, so that the first and second permanent magnets 3 and 4 can maintain the desired interval. Also, the first and
2の永久磁石 3および 4の位置が第 1および第 2の鉄心 1および 2に対してずれ るようなこともなレ、。 2 Permanent magnets 3 and 4 are displaced with respect to the first and second cores 1 and 2. There are things like that.
このような限流器に於いて、 コイル 6に定常電流が流れているときは、 電流が 小さいので、 第 1および第 2の鉄心 1および 2は飽和磁化領域から外れず、 磁束 変化が無いので、 コイル 6のインピーダンス （リアクタンス） は小さく、 コイル 6の電圧降下は小さい。 従って、 電源電圧は、 負荷に印加される。  In such a current limiter, when a steady current is flowing through the coil 6, the current is small, and the first and second iron cores 1 and 2 do not deviate from the saturation magnetization region, and there is no change in magnetic flux. The impedance (reactance) of coil 6 is small, and the voltage drop of coil 6 is small. Therefore, the power supply voltage is applied to the load.
今、 負荷が短絡し、 コイル 6に故障大電流が流れると、 第 1および第 2の鉄心 1および 2は飽和磁化領域から大きく外れ、 第 1および第 2の鉄心 1および 2は 互いに逆方向の磁気飽和領域に磁化反転するので、 コイル 6のインピーダンス （ リアクタンス） が大きくなる。 このとき、 電源電圧は殆どがコイル 6に印加され る。 このような可飽和リアク トルの原理により、 短絡時には、 全波にわたって限 流される。  Now, when the load is short-circuited and a large fault current flows through the coil 6, 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.
実施の形態 2 . Embodiment 2
図 6にはこの発明の限流器に用いることのできる別の非磁性体スぺーサ 8を示 す。 この非磁性体スぺーサ 8は非磁性体の複数の棒状部材 9を組合せて互いに結 合させて立体的な枠組体としたものであり、 非磁性体スぺーサ 8は樹脂材料製で 格子状に形成されている。 この非磁性体スぺーサ 8を第 1および第 2の永久磁石 1および 2に密接させて配置することで、 第 1および第 2の永久磁石 1および 2 間に電磁力による吸引力が働いても、 第 1および第 2の永久磁石 1および 2は初 期の構造を維持することができる。 また、 非磁性体スぺーサ 8は枠組体であるの で、 限流器内部の枠組体内部に空間を設けることができるため、 この空間を利用 して限流器内部の放熱も行なうことができる。  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. By disposing the non-magnetic spacer 8 in close contact with the first and second permanent magnets 1 and 2, an attractive force by electromagnetic force acts between the first and second permanent magnets 1 and 2. However, the first and second permanent magnets 1 and 2 can maintain the initial structure. Also, since 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.
実施の形態 3 . Embodiment 3.
図 7に示す更に別の非磁性体スぺーサ 1 0は非磁性体の 2枚の板部材 1 1と、 板部材 1 1問を互いに連結する口ッド部材 1 2とで構成された H字状の樹脂製の 枠組体である。 この非磁性体スぺーサ 1 0の板部材 1 1を第 1および第 2の永久 磁石 1および 2に密接させて配置することで、 第 1および第 2の永久磁石 1およ び 2間に作用する電磁力による吸引力を支持して.初期の構造を維持させることが できる。 また、 限流器の内部の空間を利用して限流器内部の放熱も行なうことが できる。  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. 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.

Claims

請 求 の 範 囲 The scope of the claims
1 . 互いに対向した第 1および第 2の鉄心と、 この第 1および第 2の鉄心間に 接合されて閉磁気回路を構成する第 1および第 2の永久磁石と、 上記第 1および 第 2の鉄心に跨って巻回されたコイルと、 上記第 1および第 2の永久磁石間に設 けられた非磁性体スぺーサとを備えたことを特徴とする限流器。 1. The first and second cores facing each other, the first and second permanent magnets joined between the first and second cores to form a closed magnetic circuit, and the first and second cores A current limiter comprising: a coil wound over an iron core; and a nonmagnetic spacer provided between the first and second permanent magnets.
2 . 上記非磁性体スぺーザが中実のプロック体であることを特徴とする請求項 1に記載の限流器 2. The current limiter according to claim 1, wherein the non-magnetic material spacer is a solid block.
3 . 上記非磁性体スぺーサが枠組体であることを特徴とする請求項 1に記載の 限流器。 3. The current limiter according to claim 1, wherein the nonmagnetic spacer is a frame.
PCT/JP2003/009396 2003-07-24 2003-07-24 Current limiter WO2005010902A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013237A1 (en) * 2010-07-29 2012-02-02 Areva T&D Uk Limited Current limiter
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

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JPS56118313A (en) * 1980-02-22 1981-09-17 Denki Onkyo Co Ltd High-voltage transformer
JPS6315023U (en) * 1986-07-16 1988-02-01
JPS6346818U (en) * 1986-09-12 1988-03-30
JP2002118956A (en) * 2000-10-03 2002-04-19 Mitsubishi Electric Corp Current limiter
JP2003009386A (en) * 2001-06-18 2003-01-10 Mitsubishi Electric Corp Current limiter

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 (en) * 1986-07-16 1988-02-01
JPS6346818U (en) * 1986-09-12 1988-03-30
JP2002118956A (en) * 2000-10-03 2002-04-19 Mitsubishi Electric Corp Current limiter
JP2003009386A (en) * 2001-06-18 2003-01-10 Mitsubishi Electric Corp Current limiter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013237A1 (en) * 2010-07-29 2012-02-02 Areva T&D Uk Limited Current limiter
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

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