JPH03286505A - Electromagnetic steel core - Google Patents
Electromagnetic steel coreInfo
- Publication number
- JPH03286505A JPH03286505A JP8851790A JP8851790A JPH03286505A JP H03286505 A JPH03286505 A JP H03286505A JP 8851790 A JP8851790 A JP 8851790A JP 8851790 A JP8851790 A JP 8851790A JP H03286505 A JPH03286505 A JP H03286505A
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic steel
- steel core
- electromagnetic
- insulator
- steels
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 65
- 239000010959 steel Substances 0.000 title claims abstract description 65
- 239000012212 insulator Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 10
- 239000003822 epoxy resin Substances 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 4
- 229920000647 polyepoxide Polymers 0.000 abstract description 4
- 239000002966 varnish Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、電流センサ用コアなどに用いる電磁鋼コア
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an electromagnetic steel core used for a current sensor core or the like.
従来の技術
以下に従来の電磁鋼コアについて説明する。第５図に示
すように、薄い平板状電磁Ｗ４１１をワニス等の絶縁物
１２と交互にて接着して積層させて電磁鋼コア４を構成
し、うず電流の発生を抑制してロスを少くし、効率よく
エネルギー変換させている。ＣＴとして用いる場合には
、電磁鋼コアの円筒内部に直線電流を１次側として通し
、２次側には、電気ＣＴでは電磁鋼コアのトロイダル方
向にコイルを形成し、２次側出力を得る。同じく光ＣＴ
では電磁鋼コアのトロイダル方向に光センサをはさみ込
むギャップを形成してＣＴの１次側の直線電流に比例す
る出力を２次側から得て直線電流をモニターする。BACKGROUND OF THE INVENTION A conventional electromagnetic steel core will be described below. As shown in FIG. 5, the electromagnetic steel core 4 is constructed by laminating thin flat electromagnetic W411 and insulators 12 such as varnish by adhering them alternately to suppress the generation of eddy current and reduce loss. , converts energy efficiently. When used as a CT, a linear current is passed through the cylinder of the electromagnetic steel core as the primary side, and on the secondary side, a coil is formed in the toroidal direction of the electromagnetic steel core to obtain the secondary output. . Similarly optical CT
Then, a gap is formed in the toroidal direction of the electromagnetic steel core to sandwich the optical sensor, and an output proportional to the linear current on the primary side of the CT is obtained from the secondary side to monitor the linear current.
発明が解決しようとする課題
しかしながら上記の従来の構成では、電磁鋼コアは平板
状電磁鋼自身の曲げ方向の自由度と積層方向の自由度し
かないので例えばスパイダル形状のように三次元に変化
する複雑な形状の電磁鋼コアを形成することができない
。Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, the electromagnetic steel core has only degrees of freedom in the bending direction and lamination direction of the flat electromagnetic steel itself, so it changes three-dimensionally, for example into a spiral shape. It is not possible to form an electromagnetic steel core with a complicated shape.
捷た、平板状電磁鋼自身が、曲げ方向の自由度しかない
ために積層するワニス等の絶縁物も平行に形威しなけれ
ばならないので、寸法精度のよい電磁鋼コアの形成が困
難である。さらに二次元方向の良電導体部分があるので
高周波領域でのうず電流積が発生し、ＣＴのエネルギ変
換効率を低下させ、ＣＴ自身の寿命をも低下させるとい
う問題点を有していた。Since the twisted flat plate electromagnetic steel itself has only a degree of freedom in the bending direction, the laminated insulating material such as varnish must also be shaped in parallel, making it difficult to form an electromagnetic steel core with good dimensional accuracy. . Furthermore, since there is a good conductor part in two-dimensional direction, an eddy current product occurs in a high frequency region, which reduces the energy conversion efficiency of the CT and also shortens the life of the CT itself.
本発明は、上記従来の問題点を解決するもので、三次元
に変化する複雑な形状も容易に形成でき、絶縁抵抗を増
加させ、うず電流積を抑制した電磁鋼コアを提供するこ
とを目的とする。The present invention solves the above conventional problems, and aims to provide an electromagnetic steel core that can easily form a complex shape that changes in three dimensions, increases insulation resistance, and suppresses eddy current product. shall be.
課題を解決するための手段
この目的を達成するために、本発明の電磁鋼コアは、複
数の繊維状電磁鋼を絶縁物を媒体にして束ねて樹脂で固
定する構成を有している。Means for Solving the Problems In order to achieve this object, the electromagnetic steel core of the present invention has a structure in which a plurality of fibrous electromagnetic steels are bundled using an insulator as a medium and fixed with a resin.
作 用
この構成によって繊維状電磁鋼を使用するので、三次元
に変化する複雑な形状の形成も容易となり、良電導部分
も１次元なので絶縁抵抗が高くなり高周波領域に釦いて
もうず電流積を抑制することとなる。Function: Since fibrous electromagnetic steel is used with this configuration, it is easy to form complex shapes that change in three dimensions, and since the good conductive part is also one-dimensional, the insulation resistance is high and the eddy current product increases even in the high frequency range. It will be suppressed.
実施例
以下本発明の第１の実施例について、図面を参照しなが
ら説明する。第１図に示すように、ワニス等の絶縁物２
で被覆した繊維状電磁鋼１を束ねて円筒形状に形成した
後、エポキシ樹脂などの樹脂３でモールドする。EXAMPLE A first example of the present invention will be described below with reference to the drawings. As shown in Figure 1, an insulator such as varnish 2
The fibrous electromagnetic steel 1 coated with is bundled and formed into a cylindrical shape, and then molded with a resin 3 such as epoxy resin.
電磁鋼コア４の実効的な透磁率は、電磁鋼コア４の断面
中の繊維状電磁鋼１の密度で調整され、密度が大きい場
合に実効的な透磁率が大きくなる。The effective magnetic permeability of the electromagnetic steel core 4 is adjusted by the density of the fibrous electromagnetic steel 1 in the cross section of the electromagnetic steel core 4, and the effective magnetic permeability increases as the density increases.
また、電磁鋼コア４の絶縁抵抗は、繊維状電磁状電磁鋼
１を被覆する絶縁物２の膜厚によう調整され、膜厚が大
きい場合に絶縁抵抗が高くなう、うず電流積を抑えるこ
とができる。In addition, the insulation resistance of the electromagnetic steel core 4 is adjusted according to the film thickness of the insulator 2 that covers the fibrous electromagnetic steel 1, and suppresses the eddy current product that increases the insulation resistance when the film thickness is large. be able to.
以上のように本実施例によれば、絶縁物で被覆した繊維
状電磁鋼を束ねて所定の形状にし樹脂で固定する構成に
よシ、三次元に変化する複雑な形状の電磁鋼コアを容易
に形成でき、電磁鋼コアの外形は、樹脂で形成するので
寸法精度を高くすることができる。さらに電磁鋼コアの
外面が、エポキシ樹脂等で絶縁されているのでＣＴの一
次側が高電圧であっても安全上の問題が生じない。As described above, according to this embodiment, by bundling fibrous electromagnetic steel coated with an insulator into a predetermined shape and fixing it with resin, it is easy to create an electromagnetic steel core with a complex shape that changes in three dimensions. Since the outer shape of the electromagnetic steel core is made of resin, dimensional accuracy can be increased. Furthermore, since the outer surface of the electromagnetic steel core is insulated with epoxy resin or the like, there is no safety problem even if the primary side of the CT is at high voltage.
以下、本発明の第２の実施例について図面を参照しなが
ら説明する。第１の実施例と異なるのは、絶縁物２で繊
維状電磁鋼１を被覆せずに、第２図に示すように、吸熱
反応する物質６を含んだワニス等の絶縁物５を繊維状電
磁鋼１の間隙に充填させ媒体とする点である。A second embodiment of the present invention will be described below with reference to the drawings. The difference from the first embodiment is that instead of covering the fibrous electromagnetic steel 1 with an insulating material 2, as shown in FIG. This is to fill the gaps in the electromagnetic steel 1 and use it as a medium.
なお、繊維状電磁鋼１の外周面に、第３図（ａ）及び同
図中）に示すように切れ目７を設けたものや第３図（Ｃ
）に示すようにｌ！ｉ！８を設けたものや第３図（ｄ）
に示すようにくり抜き９を設けた繊維状電磁鋼１を用い
ることもある。In addition, the outer circumferential surface of the fibrous electromagnetic steel 1 is provided with cuts 7 as shown in FIG.
) as shown in l! i! Figure 3 (d)
A fibrous electromagnetic steel 1 provided with a hollow 9 as shown in FIG. 1 may also be used.
以上のように吸熱反応する物質を絶縁物に含１せること
によジ、うず電流積や鉄損などによって生ずる電磁鋼コ
アの温度上昇を抑制することができる。また、繊維状電
磁鋼に切れ目や溝やくう抜き等の凹面を設けることによ
シ、繊維状電磁鋼の横断面の回転方向の絶縁抵抗が増し
、うず電流を抑制することができる。As described above, by including a substance that exhibits an endothermic reaction in the insulator, it is possible to suppress the temperature rise in the electromagnetic steel core caused by the eddy current product, iron loss, and the like. Further, by providing a concave surface such as a cut, a groove, or a hollow in the fibrous electromagnetic steel, the insulation resistance in the rotational direction of the cross section of the fibrous electromagnetic steel increases, and eddy current can be suppressed.
以下本発明の第３の実施例について図面を参照しながら
説明する。第４図に示すように、第１の実施例又は第２
の実施例と同様に繊維状電磁鋼と絶縁物と樹脂を備えた
構成で、形状を三次元的に変化させた、スパイラル形状
の電磁鋼コア１０である。A third embodiment of the present invention will be described below with reference to the drawings. As shown in FIG.
This is a spiral-shaped electromagnetic steel core 10 that has a configuration including fibrous electromagnetic steel, an insulator, and a resin, and whose shape is changed three-dimensionally as in the embodiment.
以上のように繊維状電磁鋼は、三次元に変化する複雑な
形状であっても容易に形成することができる。また、繊
維状電磁鋼を高密度に束ねた場合に繊維状電磁鋼の相互
の間隙に絶縁物が十分に充填されずにＮ気的に接触した
としてもｍＩａ状電磁電磁鋼周は、円弧状を有するため
に点接触にしかならず高絶縁抵抗を維持できるので繊維
状電磁鋼の相互の間隙に充填される絶縁物の量を気にす
ることなぐ所定形状の電磁鋼コアを形成することができ
る。As described above, fibrous electromagnetic steel can be easily formed into a complex shape that changes three-dimensionally. In addition, when fibrous electromagnetic steels are bundled in a high density, even if the gaps between the fibrous electromagnetic steels are not sufficiently filled with insulators and come into contact with each other due to nitrogen, the circumference of the mIa electromagnetic steels will be shaped like an arc. Because of this, only point contact can be made and high insulation resistance can be maintained, so an electromagnetic steel core of a predetermined shape can be formed without worrying about the amount of insulator filled in the gaps between the fibrous electromagnetic steels.
発明の効果
以上の実施例の説明からも明らかなように、本発明は、
複数の繊維状電磁鋼を絶縁物を媒体にして束ねて樹脂で
固定する構成により三次元に変化する複雑な形状も容易
に形成でき、かつうず電流積を抑制した高絶縁抵抗の優
れた電磁鋼コアを実現できるものである。Effects of the Invention As is clear from the description of the embodiments above, the present invention has the following effects:
An electromagnetic steel with excellent high insulation resistance that suppresses eddy current product and can easily form complex shapes that change in three dimensions by bundling multiple fibrous electromagnetic steels using an insulator as a medium and fixing them with resin. It is possible to realize the core.
第１図は本発明の第１実施例の電磁鋼コアの構成を断面
で示した斜視図、第２図は本発明の第２磁鋼の断面図、
第４図（ａ）及び同図の）は本発明の第３実施例の電磁
鋼コアの平面図及び正面図、第６図は従来の電磁鋼コア
の構成を断面で示した斜視図である。
１・・・・・・繊維状電磁鋼、２，６・・・・・・絶縁
物、３・・・・・・樹脂、４，１０・・・・・・電磁鋼
コア、６・・・・・・吸熱反応する物質。FIG. 1 is a perspective view showing the configuration of a magnetic steel core according to a first embodiment of the present invention in cross section, FIG. 2 is a cross-sectional view of a second magnetic steel core of the present invention,
FIG. 4(a) and the same figure) are a plan view and a front view of an electromagnetic steel core according to a third embodiment of the present invention, and FIG. 6 is a perspective view showing the structure of a conventional electromagnetic steel core in cross section. . 1... Fibrous electromagnetic steel, 2, 6... Insulator, 3... Resin, 4, 10... Electromagnetic steel core, 6... ...A substance that undergoes an endothermic reaction.
Claims (3)
樹脂で固定した電磁鋼コア。(1) An electromagnetic steel core made by bundling multiple fibrous electromagnetic steels using an insulator as a medium and fixing them with resin.
る請求項１記載の電磁鋼コア。(2) The electromagnetic steel core according to claim 1, wherein the insulator is an insulator containing a substance that undergoes an endothermic reaction.
り抜き等の凹面を設けた繊維状電磁鋼である請求項１記
載の電磁鋼コア。(3) The electromagnetic steel core according to claim 1, wherein the fibrous electromagnetic steel is a fibrous electromagnetic steel having a concave surface such as a cut, a groove, or a hollow on its outer peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8851790A JPH03286505A (en) | 1990-04-03 | 1990-04-03 | Electromagnetic steel core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8851790A JPH03286505A (en) | 1990-04-03 | 1990-04-03 | Electromagnetic steel core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03286505A true JPH03286505A (en) | 1991-12-17 |
Family
ID=13945022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8851790A Pending JPH03286505A (en) | 1990-04-03 | 1990-04-03 | Electromagnetic steel core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03286505A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014080A2 (en) * | 1992-12-17 | 1994-06-23 | Commissariat A L'energie Atomique | Process for determination of the intrinsic magnetic permeability of oblong ferromagnetic elements and electromagnetic properties of composite materials composed of such elements |
| FR2764429A1 (en) * | 1997-11-26 | 1998-12-11 | Commissariat Energie Atomique | Magnetic circuit formed of magnetic wires insulated from each other |
| JP2008311323A (en) * | 2007-06-13 | 2008-12-25 | Kodensha:Kk | Mounting method of induction coil for battery-less structure |
| JP2015133432A (en) * | 2014-01-15 | 2015-07-23 | 古河電気工業株式会社 | Inductance wire, transformation device, and rectifier |
-
1990
- 1990-04-03 JP JP8851790A patent/JPH03286505A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014080A2 (en) * | 1992-12-17 | 1994-06-23 | Commissariat A L'energie Atomique | Process for determination of the intrinsic magnetic permeability of oblong ferromagnetic elements and electromagnetic properties of composite materials composed of such elements |
| WO1994014080A3 (en) * | 1992-12-17 | 1994-10-13 | Commissariat Energie Atomique | Process for determination of the intrinsic magnetic permeability of oblong ferromagnetic elements and electromagnetic properties of composite materials composed of such elements |
| US5691645A (en) * | 1992-12-17 | 1997-11-25 | Commissariat A L'energie Atomique | Process for determining intrinsic magnetic permeability of elongated ferromagnetic elements and electromagnetic properties of composites using such elements |
| FR2764429A1 (en) * | 1997-11-26 | 1998-12-11 | Commissariat Energie Atomique | Magnetic circuit formed of magnetic wires insulated from each other |
| JP2008311323A (en) * | 2007-06-13 | 2008-12-25 | Kodensha:Kk | Mounting method of induction coil for battery-less structure |
| JP2015133432A (en) * | 2014-01-15 | 2015-07-23 | 古河電気工業株式会社 | Inductance wire, transformation device, and rectifier |
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