JPH11176655A - Coil having magnetic core - Google Patents
Coil having magnetic coreInfo
- Publication number
- JPH11176655A JPH11176655A JP9351978A JP35197897A JPH11176655A JP H11176655 A JPH11176655 A JP H11176655A JP 9351978 A JP9351978 A JP 9351978A JP 35197897 A JP35197897 A JP 35197897A JP H11176655 A JPH11176655 A JP H11176655A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic core
- magnetic
- coil
- plate
- core
- 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
Links
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- Coils Of Transformers For General Uses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＥＬ駆動回路の昇圧
回路等のチョーク・コイルや、変圧器等の磁心入りコイ
ルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a choke coil such as a booster circuit of an EL drive circuit, and a cored coil such as a transformer.
【０００２】[0002]
【従来の技術】従来の磁心入りコイルの例を二、三示す
と、図５のものは、フェライト系の粉末磁性体を成形し
て磁心１の両端にフランジ３を設けた巻き枠を製作し、
これに巻き線２を巻いたものである。図６は、パーマロ
イ、珪素鋼板等の金属磁性材料板をプレス抜きしたＩ字
形の磁心１に、巻き線２を巻いたものである。図７はス
ピンドルモータ用のコイルで、うず電流損を低減するた
めに、磁心１は厚さ０．３〜０．５ｍｍ程度の珪素鋼板
の磁性板４を複数枚積層して作ったもので、これに巻き
線２を施してあり、５は各層の磁性板４を半抜きして設
けたピンで、半抜きピン５を上か下に重なっている磁性
板４の半抜き穴にはめることで全部の磁性板４を揃えて
いる。図８は、同様にパーマロイや珪素鋼板の磁性板４
を積層した磁心１に巻き線２を巻いた磁心入りコイルで
あるが、磁心の形状がＣ字形のものである。2. Description of the Related Art A few examples of a conventional coil with a magnetic core are shown in FIG. 5. In FIG. 5, a coil having a magnetic core 1 provided with flanges 3 at both ends is manufactured by molding a ferrite powder magnetic material. ,
The winding 2 is wound around this. FIG. 6 is a diagram in which a winding 2 is wound around an I-shaped magnetic core 1 obtained by pressing a metal magnetic material plate such as a permalloy or a silicon steel plate. FIG. 7 shows a coil for a spindle motor. In order to reduce eddy current loss, the magnetic core 1 is formed by laminating a plurality of silicon steel magnetic plates 4 having a thickness of about 0.3 to 0.5 mm. A winding 2 is applied to this, and 5 is a pin provided by half-punching the magnetic plate 4 of each layer, and the half-punch pin 5 is inserted into a half-punched hole of the magnetic plate 4 overlapping above or below. All the magnetic plates 4 are arranged. FIG. 8 also shows a magnetic plate 4 made of a permalloy or silicon steel plate.
Is a coil with a magnetic core in which a winding wire 2 is wound around a magnetic core 1 in which C is laminated, and the shape of the magnetic core is C-shaped.
【０００３】[0003]
【発明が解決しようとする課題】上記のような従来の磁
心入りコイルは、それぞれ次に述べる問題を持ってい
る。すなわちフェライト系の粉末磁性体で磁心１を作る
図５のものでは、粉末磁性材料の磁束密度が金属磁性材
料より低いため、金属磁性材料の磁心と同程度の磁束を
得るには体積を大きくせねばならず、小型化が妨げられ
る。また、粉末成形の製造コストも金属板をプレス抜き
するのに比べて割高である。The above-mentioned conventional cored coils have the following problems. That is, in FIG. 5 in which the magnetic core 1 is made of a ferrite-based powder magnetic material, since the magnetic flux density of the powder magnetic material is lower than that of the metal magnetic material, the volume must be increased in order to obtain the same magnetic flux as the magnetic core of the metal magnetic material. And miniaturization is hindered. Also, the production cost of powder molding is higher than pressing a metal plate.
【０００４】図６の、金属磁性材料板をプレス抜きして
磁心１を作るものは、磁気特性や加工の容易さでは図５
の粉末成形品に勝るが、下記のようにうず電流損の面で
不利になる。単位時間、単位体積当たりの磁性体のうず
電流損Ｗｅは次式で表される。 Ｗｅ＝σｔ2ｆ2Ｂ2 ここに、σは比例定数、ｔは板厚、ｆは磁界の周波数、
Ｂは最大磁束密度である。この式によればうず電流損は
板厚が増えると急速に大きくなるから、これを押さえる
には板厚を小さくするのが有効である。そこで図７のモ
ータ用コイルでは、表面を絶縁した、１枚の厚さが薄い
珪素鋼板の磁性板４を重ねたものを磁心１にしているの
であるが、各磁性板４に半抜きピン５を設けて磁性板同
士を結合するため板厚を減らすのに限度があって、前記
のように０．３〜０．５ｍｍ以下にできず、更なる薄型
化、小型化、高性能化が困難であった。本発明は磁心入
りコイルに関するこれらの問題を解決することを目的と
する。[0006] The magnetic core 1 formed by pressing a metal magnetic material plate as shown in FIG.
However, it is disadvantageous in terms of eddy current loss as described below. The eddy current loss We of the magnetic substance per unit time and unit volume is expressed by the following equation. We = σt 2 f 2 B 2 where σ is a proportionality constant, t is the plate thickness, f is the frequency of the magnetic field,
B is the maximum magnetic flux density. According to this equation, the eddy current loss increases rapidly as the plate thickness increases, and it is effective to reduce the plate thickness to suppress this. Therefore, in the motor coil shown in FIG. 7, the magnetic core 1 is formed by laminating one magnetic plate 4 of a thin silicon steel plate whose surface is insulated. There is a limit in reducing the plate thickness because the magnetic plates are connected to each other, so that the thickness cannot be reduced to 0.3 to 0.5 mm or less as described above, and further thinning, miniaturization, and high performance are difficult. Met. The present invention is directed to overcoming these problems with respect to cored coils.
【０００５】[0005]
【課題を解決するための手段】本発明では、磁心入りコ
イルにおいて、表面に絶縁処理を施したパーマロイ、珪
素鋼板等の金属磁性材料板を折り曲げて重ね合わせ、必
要な磁束の得られる厚さにしたものを磁心にする。これ
は各磁性板が折り曲げ部でつながった一体構造であるか
ら、前記のように別々の板を揃えるために各板に半抜き
ピンを設けたりする必要がなく、板厚を従来より大幅に
薄くして磁心のうず電流損を低減することができる。加
工上も順送プレス型により能率よく製作できる。According to the present invention, in a coil containing a magnetic core, a metal magnetic material plate such as permalloy or silicon steel plate whose surface has been subjected to insulation treatment is bent and superimposed on each other so as to have a thickness capable of obtaining a required magnetic flux. Make the core a core. Since this is an integrated structure in which each magnetic plate is connected by a bent part, there is no need to provide a half punch pin on each plate to align separate plates as described above, and the plate thickness is significantly thinner than before. Thus, eddy current loss of the magnetic core can be reduced. Efficiency can be produced by progressive press die in processing.
【０００６】[0006]
【発明の実施の形態】以下、図面に基づいて本発明の実
施形態を説明する。なお、前記の説明を含め、同種の部
品や部分については同じ符号を用いることにする。図１
は本発明の磁心入りコイルの実施形態の一つで、巻き線
を一部切り取って示してある。磁心１は先の図６のもの
と同様に形状が棒状のＩ字形であるが、図６のような単
一片ではなく、表面を絶縁したパーマロイ、珪素鋼板等
の磁性体薄板を折り曲げて３層に積層したものであり、
これに巻き線２を施してある。磁性材料板の厚さは０．
０５〜０１５ｍｍ程度で、場合によってはそれ以下にも
できる。これは従来の０．３〜０．５ｍｍよりもずっと
薄い。Embodiments of the present invention will be described below with reference to the drawings. Note that the same reference numerals are used for the same kind of parts and parts including the above description. FIG.
Is an embodiment of a cored coil according to the present invention, in which a winding is partially cut out. The magnetic core 1 is a bar-shaped I-shape similar to that of FIG. 6, but it is not a single piece as shown in FIG. 6, but a three-layered magnetic material sheet such as permalloy or silicon steel sheet whose surface is insulated is bent. Is laminated on
The winding 2 is applied to this. The thickness of the magnetic material plate is 0.
It is about 0.05 to 015 mm, and in some cases, it can be smaller. This is much thinner than the conventional 0.3-0.5 mm.
【０００７】磁心１を展開した形状は図２のごとくで、
両側に各層の連結部６、７があり、折り曲げ線８と折り
曲げ線９では互いに逆方向に折り曲げる。これはＩ字形
を横に並べてつないだ形状であるが、容易に分かるよう
に、Ｉ字形磁心の展開形状はこの他にも例えばＩ字形を
縦に積み重ねた形とし、積み重ねの境界を折り曲げ部と
することも可能であり、要は磁心の輪郭の一部に層間の
連結部を設けるということである。The expanded shape of the magnetic core 1 is as shown in FIG.
There are connecting portions 6 and 7 of each layer on both sides, and the bending lines 8 and 9 are bent in opposite directions. This is a shape in which the I-shape is connected side by side, but as can be easily understood, the development shape of the I-shape magnetic core is, for example, a shape in which the I-shape is vertically stacked, and the boundary of the stack is a bent portion. It is also possible to provide a connection between the layers at a part of the contour of the magnetic core.
【０００８】このような構造の磁心１は、全体の厚さが
ある程度大きくとも、個々の磁性板４は厚さが薄く互い
に絶縁されているから、前掲の式で計算されるうず電流
損が小さくなる。通常、磁性材料板は素材の製造工程で
表面が酸化されて絶縁層を生じるが、確実を期するため
には表面処理して絶縁膜を形成する。In the magnetic core 1 having such a structure, the individual magnetic plates 4 are thin and insulated from each other even if the overall thickness is somewhat large, so that the eddy current loss calculated by the above formula is small. Become. Usually, the surface of the magnetic material plate is oxidized in the process of manufacturing the material to form an insulating layer. However, to ensure reliability, the surface is treated to form an insulating film.
【０００９】図３は本発明の第２の実施形態で、同じく
巻き線を一部切り取って示してあり、磁心１は先の図８
のものに似て形状がＣ字形であるが、ここでも磁心１は
磁性体の薄板材を折り曲げることにより磁性板４を３層
に積層したもので、両端をＣ字形に湾曲させて巻き線２
を施してある。磁心１の展開形状は図４のごとくで、中
央部に各層の連結部６、７があり、折り曲げ線８と折り
曲げ線９では互いに逆方向に折り曲げる。FIG. 3 shows a second embodiment of the present invention, in which the winding is also partially cut away, and the magnetic core 1 is shown in FIG.
The shape of the magnetic core 1 is also a C-shaped one, but the magnetic core 1 is also formed by laminating a magnetic thin plate material into three layers of a magnetic plate 4 and curving both ends into a C-shape to form a winding 2.
Has been given. The developed shape of the magnetic core 1 is as shown in FIG. 4, and there are connecting portions 6 and 7 of each layer at the center, and the bending lines 8 and 9 are bent in opposite directions.
【００１０】このようなＣ字形の磁心の場合、本発明に
従って薄板材を曲げ加工して磁心１にしたものでは、前
記のうず電流損の低減に加えて次の利点がある。磁心材
料が方向性珪素鋼板の場合、磁気特性は方向性があって
一様でなく、圧延方向に平行に磁界を加えた場合に比透
磁率が最も高くてヒステリシス損が小さくなる。従っ
て、例えば図８の従来のものでは、珪素鋼板を打ち抜い
た磁心１のＣ字形と圧延方向１０との関係が図示のよう
であると、巻き線部および反対側の空隙を含む磁心の部
分では磁路が圧延方向１０に平行であって具合がよい
が、これらと直交して両側をつないでいる部分では、磁
路が圧延方向に直角になって好ましくない。改良を図る
としても、Ｃ字形の配置を圧延方向に対し４５゜傾けて
特性を平均化する程度である。In the case of such a C-shaped magnetic core, the one obtained by bending a thin plate material into the magnetic core 1 according to the present invention has the following advantages in addition to the reduction of the eddy current loss. When the magnetic core material is a grain-oriented silicon steel sheet, the magnetic properties are directional and non-uniform, and when a magnetic field is applied parallel to the rolling direction, the relative magnetic permeability is highest and the hysteresis loss is small. Therefore, for example, in the prior art shown in FIG. 8, if the relationship between the C-shape of the magnetic core 1 punched out of the silicon steel sheet and the rolling direction 10 is as shown in the figure, the core part including the winding part and the void on the opposite side is formed. Although the magnetic path is parallel to the rolling direction 10 and is good, the magnetic path is undesirably perpendicular to the rolling direction at the portion connecting both sides. Even if the improvement is intended, the C-shaped arrangement is inclined at an angle of 45 ° to the rolling direction to average the characteristics.
【００１１】しかし本発明の場合は、図４の磁心１の展
開形状の長手を珪素鋼板の圧延方向１０に向ければ、図
３の完成形状においてＣ型の磁路が全長に亘って圧延方
向に沿ったものとなり、最も磁気特性の優れた磁心にな
る。そして板厚を薄くできることによるうず電流損の減
少と上記ヒステリシス損の減少を合わせて鉄損を最小に
する磁心が得られるのである。However, in the case of the present invention, if the length of the developed shape of the magnetic core 1 in FIG. 4 is oriented in the rolling direction 10 of the silicon steel sheet, the C-shaped magnetic path in the completed shape in FIG. The magnetic core has the best magnetic properties. The reduction of the eddy current loss and the reduction of the above-mentioned hysteresis loss due to the reduction in the thickness of the plate can provide a magnetic core which minimizes the iron loss.
【００１２】図７のモータ用コイルの場合も、図示は省
くが、各磁性板４の外周の一部に隣接層との連結部を設
けて連鎖状に展開した形を考えるなら、これを折り畳ん
で重ねることにより、半抜きピン５を用いることなく全
体がつながった積層磁心を得られることが理解されよ
う。上記の各実施形態の磁心を製作するのに、磁性材料
板から図２、図４のような展開した形状のブランクを打
ち抜き、これを曲げ加工して完成形状にすることはもち
ろん可能であるが、順送プレス型加工を用いれば帯材か
ら直接に完成形状の磁心が得られ、非常に生産性よく製
造できる。The motor coil shown in FIG. 7 is also omitted from the drawing. However, if it is considered that the magnetic plate 4 is provided with a connecting portion with an adjacent layer on a part of the outer periphery thereof and is developed in a chain, it is folded. It can be understood that the stacked cores can be obtained as a whole without using the half blanking pins 5. In order to manufacture the magnetic core of each of the above embodiments, it is of course possible to punch a blank having a developed shape as shown in FIGS. 2 and 4 from a magnetic material plate and to bend it into a completed shape. If a progressive press die is used, a magnetic core of a completed shape can be obtained directly from the strip, and it can be manufactured with extremely high productivity.
【００１３】[0013]
【発明の効果】以上述べたように、本発明の磁心入りコ
イルは金属磁性材料の板材を折り曲げて積層した磁心を
備えたものであって、粉末成形のものに比し小型化、薄
型化が可能であり、積層構造であるから金属磁性材料の
単一片の磁心よりもうず電流損が小さい。プレス抜きし
た磁性板を積層したものと比べても、磁心に半抜きピン
等を設ける必要がないから板厚を従来よりも薄くでき
て、うず電流損がより小さくなり、さらに、磁路が湾曲
しているものの場合、磁路の全長を素材の圧延方向に合
わせることが可能で鉄損が減少する。本発明の磁心入り
コイルは順送プレス型によって製造するのに適し、これ
によって小型、高性能の磁心入りコイルを廉価に提供で
きるのである。As described above, the coil with a magnetic core of the present invention has a magnetic core obtained by bending and laminating a plate made of a metallic magnetic material, and is smaller and thinner than a powder-molded coil. Since it is possible and has a laminated structure, the current loss is smaller than that of a single core made of a metallic magnetic material. Compared with the laminated magnetic plate obtained by pressing, there is no need to provide half-punched pins in the magnetic core, so the plate thickness can be made smaller than before, the eddy current loss is smaller, and the magnetic path is curved. In this case, the total length of the magnetic path can be adjusted to the rolling direction of the material, and iron loss is reduced. The cored coil of the present invention is suitable for being manufactured by a progressive press die, whereby a small-sized, high-performance cored coil can be provided at low cost.
【図１】本発明による磁心入りコイルの一部を切りとっ
た斜視図である。FIG. 1 is a perspective view of a part of a cored coil according to the present invention.
【図２】図１の磁心入りコイルの磁心の展開図である。FIG. 2 is a development view of a magnetic core of the cored coil of FIG. 1;
【図３】本発明による別の磁心入りコイルの一部を切り
とった斜視図である。FIG. 3 is a perspective view of a part of another coil with a magnetic core according to the present invention.
【図４】図３の磁心入りコイルの磁心の展開図である。FIG. 4 is a developed view of a magnetic core of the cored coil of FIG. 3;
【図５】従来の磁心入りコイルの斜視図である。FIG. 5 is a perspective view of a conventional coil with a magnetic core.
【図６】従来の別の磁心入りコイルの斜視図である。FIG. 6 is a perspective view of another conventional coil with a magnetic core.
【図７】従来のモータ用コイルの斜視図である。FIG. 7 is a perspective view of a conventional motor coil.
【図８】従来の別の磁心入りコイルの斜視図である。FIG. 8 is a perspective view of another conventional coil with a magnetic core.
１ 磁心 ２ 巻き線 ４ 磁性板 ５ 半抜きピン ６、７ 連結部 ８、９ 折り曲げ線 １０ 圧延方向 DESCRIPTION OF SYMBOLS 1 Magnetic core 2 Winding 4 Magnetic plate 5 Half blanking pin 6,7 Connecting part 8,9 Folding line 10 Rolling direction
Claims (4)
おいて、 磁心は表面が絶縁された金属磁性材料板を折り曲げて積
層したものであることを特徴とする磁心入りコイル。1. A coil with a magnetic core having a winding wound on a magnetic core, wherein the magnetic core is formed by bending and laminating a metal magnetic material plate whose surface is insulated.
て、 磁心は輪郭の一部に層間の連結部を設けてあることを特
徴とする磁心入りコイル。2. The coil with a magnetic core according to claim 1, wherein the magnetic core is provided with a connection portion between layers at a part of the contour.
て、 磁心は形状が棒状であって、端部に層間の連結部を設け
てあることを特徴とする磁心入りコイル。3. The coil with a magnetic core according to claim 2, wherein the magnetic core has a rod-like shape, and a connection portion between layers is provided at an end portion.
て、 磁心は両端が湾曲した形状であって、ほぼ中央部に層間
の連結部を設けてあることを特徴とする磁心入りコイ
ル。4. The coil with a magnetic core according to claim 2, wherein the magnetic core has a curved shape at both ends, and a connection portion between layers is provided at a substantially central portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35197897A JP3844162B2 (en) | 1997-12-08 | 1997-12-08 | Coil with magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35197897A JP3844162B2 (en) | 1997-12-08 | 1997-12-08 | Coil with magnetic core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11176655A true JPH11176655A (en) | 1999-07-02 |
| JP3844162B2 JP3844162B2 (en) | 2006-11-08 |
Family
ID=18420938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35197897A Expired - Fee Related JP3844162B2 (en) | 1997-12-08 | 1997-12-08 | Coil with magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3844162B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002171701A (en) * | 2000-11-30 | 2002-06-14 | Seiko Instruments Inc | Spindle motor |
| WO2005098116A1 (en) * | 2004-03-30 | 2005-10-20 | Shima Seiki Manufacturing, Ltd. | Selection actuator for knitting member |
-
1997
- 1997-12-08 JP JP35197897A patent/JP3844162B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002171701A (en) * | 2000-11-30 | 2002-06-14 | Seiko Instruments Inc | Spindle motor |
| WO2005098116A1 (en) * | 2004-03-30 | 2005-10-20 | Shima Seiki Manufacturing, Ltd. | Selection actuator for knitting member |
| US7310977B2 (en) | 2004-03-30 | 2007-12-25 | Shima Seiki Manufacturing, Ltd. | Selection actuator for knitting member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3844162B2 (en) | 2006-11-08 |
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