JPH06251946A - Inductor component - Google Patents
Inductor componentInfo
- Publication number
- JPH06251946A JPH06251946A JP5054591A JP5459193A JPH06251946A JP H06251946 A JPH06251946 A JP H06251946A JP 5054591 A JP5054591 A JP 5054591A JP 5459193 A JP5459193 A JP 5459193A JP H06251946 A JPH06251946 A JP H06251946A
- Authority
- JP
- Japan
- Prior art keywords
- soft magnetic
- magnetic drum
- sleeve
- drum
- temperature coefficient
- 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
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はインダクタ部品に関し、
特に温度特性のよいインダクタ部品に関する。BACKGROUND OF THE INVENTION The present invention relates to an inductor component,
In particular, it relates to an inductor component having good temperature characteristics.
【０００２】[0002]
【従来の技術】インダクタ或いはトランス等のコイル部
品（以下インダクタ部品と称する）の諸特性のうちでイ
ンダクタンスまたは結合係数の温度係数は特に重要であ
る。従来のインダクタ部品の磁心材料の透磁率は温度係
数が正のものが大多数を占めており、温度係数の小さい
材料は極く限られている。したがって、磁気特性の良い
材料を使用しながら温度特性を改善したインダクタンス
部品を提供することが要求されている。2. Description of the Related Art Among various characteristics of a coil component such as an inductor or a transformer (hereinafter referred to as an inductor component), a temperature coefficient of an inductance or a coupling coefficient is particularly important. The magnetic permeability of the magnetic core material of the conventional inductor component is mostly the one having a positive temperature coefficient, and the material having a small temperature coefficient is extremely limited. Therefore, it is required to provide an inductance component having improved temperature characteristics while using a material having good magnetic characteristics.
【０００３】[0003]
【発明が解決しようとする課題】従来のインダクタ部品
に使用された磁心材料は高い透磁率、高いＱ、及び小さ
い温度係数を兼備したものは少ない。本発明は高い透磁
率を有する磁心材料を使用しながら低い温度係数を両立
させたインダクタ部品を提供することを目的とする。There are few magnetic core materials used for conventional inductor components that have a high magnetic permeability, a high Q and a small temperature coefficient. An object of the present invention is to provide an inductor component which has a low temperature coefficient while using a magnetic core material having a high magnetic permeability.
【０００４】[0004]
【課題を解決するための手段】本発明は、円柱部及び両
端の拡大フランジ部を有する軟磁性ドラムと、該軟磁性
ドラムの前記円柱部に巻装したコイル巻線と、前記軟磁
性ドラムを取り囲み且つ前記拡大フランジ部に嵌合する
軟磁性スリーブとよりなるインダクタンス部品におい
て、前記軟磁性ドラムと前記軟磁性スリーブの温度係数
が逆符号にして組み合わせることにより従来の問題点を
解決する。近年負の温度係数を有する軟磁性材料が開発
されている。本発明は従来の主流を占めた正の温度係数
を有する磁心材料に、負の温度係数を有する磁心材料を
組み合わせることにより高い透磁率を維持しながら温度
係数を低下させることを可能にする。なお温度係数はＬ
をインダクタ、Ｔを温度とすると（ｄＬ／Ｌ）／ｄＴで
定義できるが、ほぼ（△Ｌ／Ｌ）／（Ｔ−２０）で近似
できる（ただし、Ｌは２０℃のインダクタンス、△Ｌは
温度Ｔ℃におけるインダクタンスからＬを引いたも
の）。According to the present invention, there are provided a soft magnetic drum having a cylindrical portion and enlarged flange portions at both ends, a coil winding wound around the cylindrical portion of the soft magnetic drum, and the soft magnetic drum. In an inductance component including a soft magnetic sleeve that surrounds and fits to the enlarged flange portion, the conventional magnetic disk and the soft magnetic sleeve have the temperature coefficients opposite to each other and are combined to solve the conventional problems. In recent years, soft magnetic materials having a negative temperature coefficient have been developed. The present invention makes it possible to lower the temperature coefficient while maintaining a high magnetic permeability by combining a conventional magnetic core material having a positive temperature coefficient which occupies the mainstream with a magnetic core material having a negative temperature coefficient. The temperature coefficient is L
Can be defined as (dL / L) / dT where T is the temperature, but can be approximated by (ΔL / L) / (T-20) (where L is the inductance at 20 ° C and ΔL is the temperature Inductance at T ° C minus L).
【０００５】図３のは正の温度係数を有する磁心Ｔ7
Ｆ（ＴＤＫ製軟磁性フェライト。常温の初期透磁率は
８）を用いたインダクタのインダクタンスの変化率△Ｌ
／Ｌを示し、は負の温度係数を有する磁心Ｔ8 Ｆ（Ｔ
ＤＫ製軟磁性フェライト。常温の初期透磁率は６）を用
いたインダクタのインダクタンスの変化率を示す。ま
た、ここで用いたインダクタは、円柱部及び両端の拡大
フランジ部を有する軟磁性ドラムの前記円柱部に１本の
コイル巻線を施し、この軟磁性ドラムを取り囲み且つ前
記拡大フランジ部に嵌合する軟磁性スリーブとより構成
した（詳細な構造は後述）。これらは全体を同一磁心材
料で構成したのでは温度係数が改善できない。FIG. 3 shows a magnetic core T 7 having a positive temperature coefficient.
Inductance change rate ΔL of F (soft magnetic ferrite made by TDK. Initial magnetic permeability at room temperature is 8)
/ L is a magnetic core having a negative temperature coefficient T 8 F (T
DK soft magnetic ferrite. The initial magnetic permeability at room temperature indicates the rate of change of the inductance of the inductor using 6). In addition, the inductor used here has one coil winding on the cylindrical portion of the soft magnetic drum having a cylindrical portion and enlarged flange portions at both ends, and surrounds the soft magnetic drum and fits on the enlarged flange portion. It is composed of a soft magnetic sleeve (detailed structure will be described later). The temperature coefficient cannot be improved if they are all made of the same magnetic core material.
【０００６】本発明のインダクタ部品は、より具体的に
はプリント基板に平らに取り付けるいわゆる面実装型ト
ランスとして使用できるように、外形が円筒形または直
方体形であり、軟磁性ドラムと軟磁性スリーブの端面が
ほぼ同一の平面をなし、両巻線の端部が前記平面に引き
出されて膜状外部端子に接続されている。なお、本発明
のインダクタ部品の構造は本出願人が先に提供した単一
巻線を有するインダクタ部品に関する実開昭６３−１２
８０９号、実公昭６２−９６８９号に記載されたものと
共通する技術手段を使用できるので詳細は省略するが、
必要ならこれらの文献を参照されたい。また本発明はト
ランスとしても実現できるが以下の説明はインダクタの
例について行う。More specifically, the inductor component of the present invention has a cylindrical or rectangular parallelepiped outer shape so that it can be used as a so-called surface mount type transformer mounted flat on a printed circuit board, and has a soft magnetic drum and a soft magnetic sleeve. The end faces form substantially the same plane, and the ends of both windings are drawn out to the plane and connected to the film-shaped external terminals. The structure of the inductor component of the present invention relates to the inductor component having a single winding previously provided by the present applicant.
Although the technical means common to those described in No. 809 and Japanese Utility Model Publication No. 62-9689 can be used, details thereof will be omitted.
Please refer to these documents if necessary. The present invention can also be realized as a transformer, but the following description will be made with respect to an inductor.
【０００７】[0007]
【作用】本発明の構成によると、ほぼ巻線の周りに閉磁
路を形成する軟磁性ドラムとその周りに被せた軟磁性ス
リーブとが温度係数が逆の材料より構成されたため、両
者の温度係数が打ち消しあって、温度係数が０に近付き
改善される。また両者の磁性材料の温度係数の組み合わ
せが適当ならインダクタ部品の温度係数をほぼゼロに近
付けることができる。According to the structure of the present invention, since the soft magnetic drum that forms a closed magnetic circuit around the winding and the soft magnetic sleeve that covers the soft magnetic drum are made of materials having opposite temperature coefficients, the temperature coefficients of both are increased. Cancel each other out, and the temperature coefficient approaches 0 and is improved. Further, if the combination of the temperature coefficients of both magnetic materials is appropriate, the temperature coefficient of the inductor component can be brought close to zero.
【０００８】[0008]
【実施例の説明】以下図面を参照して本発明を詳しく説
明する。図１は本発明のインダクタ部品の縦断面図、図
２は図１のインダクタ部品の右側面図である。本発明の
インダクタ部品は、第１の軟磁性フェライト製の円柱部
１３及び両端の拡大フランジ部９、９を有する軟磁性ド
ラム１と、該軟磁性ドラムの前記円柱部に巻装したコイ
ル巻線５と、前記軟磁性ドラム１を取り囲み且つ前記拡
大フランジ部９、９に嵌合する貫通孔２を有しかつ第１
の軟磁性フェライトとは温度係数が逆の第２の軟磁性フ
ェライト製の円筒状軟磁性スリーブ３とよりなる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. 1 is a vertical sectional view of an inductor component of the present invention, and FIG. 2 is a right side view of the inductor component of FIG. The inductor component of the present invention comprises a soft magnetic drum 1 having a first soft magnetic ferrite cylindrical portion 13 and enlarged flange portions 9, 9 at both ends, and a coil winding wound around the cylindrical portion of the soft magnetic drum. 5 and a through hole 2 that surrounds the soft magnetic drum 1 and that fits in the enlarged flange portions 9 and 9, and
The soft magnetic ferrite has a cylindrical soft magnetic sleeve 3 made of a second soft magnetic ferrite having a temperature coefficient opposite to that of the soft magnetic ferrite.
【０００９】より詳しく説明すると、コイル巻線５の両
端の引出しリード１７、２１それぞれフランジ部９、１
１の周辺から軟磁性ドラム１の両端面に引き出され、端
面に塗布した導電塗膜あるいはメッキにハンダ付けされ
ている。一方スリーブ３の両端面には導電塗膜あるいは
メッキにより外部端子２５、２９が形成されている。こ
の状態で軟磁性ドラム１はスリーブ３の貫通孔２に挿入
され、リード１７、２１はハンダ３７、４１によりそれ
ぞれ外部端子２５、２９にハンダ付けされ、最後に樹脂
被覆３１、３３が施されている。More specifically, the lead-out leads 17 and 21 at both ends of the coil winding 5 are respectively flange portions 9 and 1.
1 is drawn out to the both end surfaces of the soft magnetic drum 1 and soldered to a conductive coating film or plating applied to the end surfaces. On the other hand, external terminals 25 and 29 are formed on both end surfaces of the sleeve 3 by a conductive coating film or plating. In this state, the soft magnetic drum 1 is inserted into the through hole 2 of the sleeve 3, the leads 17 and 21 are soldered to the external terminals 25 and 29 by solders 37 and 41, respectively, and finally the resin coatings 31 and 33 are applied. There is.
【００１０】プリント基板に平らに取り付けるいわゆる
面実装型インダクタとして使用できるように、スリーブ
３の外形断面は円筒形、正方形、または長方形にする。
また結合係数は軟磁性ドラム１のフランジ部９、１１と
スリーブ３の貫通孔２の間に隙間を調整することにより
調整できる。フランジ部９、１１に軸線方向の溝をつけ
てそこから引出しリード１７、２１を引き出せば、フラ
ンジ部の径を大きくして隙間を減らし結合係数を上げる
ことができる。The outer cross section of the sleeve 3 is cylindrical, square, or rectangular so that it can be used as a so-called surface mount type inductor that is mounted flat on a printed circuit board.
The coupling coefficient can be adjusted by adjusting the gap between the flange portions 9 and 11 of the soft magnetic drum 1 and the through hole 2 of the sleeve 3. If grooves are formed in the flange portions 9 and 11 in the axial direction and the lead leads 17 and 21 are pulled out from the grooves, the diameter of the flange portions can be increased to reduce the gap and increase the coupling coefficient.
【００１１】次に、上記の構造を有するインダクタにお
いて、次の表１の組み合わせを採用した。なお、試料
とについてはすでに説明した。Next, in the inductor having the above structure, the combinations shown in Table 1 below were adopted. The sample has already been described.
【００１２】[0012]
【表１】 [Table 1]
【００１３】結果を図３に示した。試料に示した様に
ドラムに正の温度係数を有する材料を、スリーブに負の
温度係数を有する材料を使用すると温度係数が改善され
る。また、試料に示した様にドラムに負の温度係数を
有する材料を、またスリーブに正の温度係数を有する材
料を組み合わせると温度係数が非常に改善されている。The results are shown in FIG. Using a material with a positive temperature coefficient for the drum as shown in the sample and a material with a negative temperature coefficient for the sleeve improves the temperature coefficient. Also, as shown in the sample, when the material having a negative temperature coefficient is combined with the drum and the material having a positive temperature coefficient is combined with the sleeve, the temperature coefficient is greatly improved.
【００１４】[0014]
【発明の効果】本発明によると、正負の温度係数を有す
る材料を組み合わせることにより、他の特性を犠牲にし
ないで温度係数を改善することができる。According to the present invention, by combining materials having positive and negative temperature coefficients, the temperature coefficient can be improved without sacrificing other characteristics.
【図１】本発明のインダクタ部品の縦断面図である。FIG. 1 is a vertical sectional view of an inductor component of the present invention.
【図２】図１のインダクタ部品の右側面図である。FIG. 2 is a right side view of the inductor component shown in FIG.
【図３】本発明及び比較例の温度特性を示すグラフであ
る。FIG. 3 is a graph showing temperature characteristics of the present invention and a comparative example.
１ 軟磁性ドラム ３ 軟磁性スリーブ ５ コイル巻線 ９ フランジ部 １３ 円柱部 １７、２１ 引出しリード ３７、４１ ハンダ層 ３１、３３ 樹脂被覆 1 Soft Magnetic Drum 3 Soft Magnetic Sleeve 5 Coil Winding 9 Flange Part 13 Cylindrical Part 17, 21 Draw Lead 37, 41 Solder Layer 31, 33 Resin Coating
フロントページの続き (72)発明者 渡部 誠二 東京都中央区日本橋一丁目13番１号ティー ディーケイ株式会社内Front page continuation (72) Inventor Seiji Watanabe 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation
Claims (3)
る軟磁性ドラムと、該軟磁性ドラムの前記円柱部に巻装
したコイル巻線と、前記軟磁性ドラムを取り囲み且つ前
記拡大フランジ部に嵌合する軟磁性スリーブとよりなる
インダクタンス部品において、前記軟磁性ドラムと前記
軟磁性スリーブの温度係数が逆符号であるインダクタン
ス部品。1. A soft magnetic drum having a cylindrical portion and enlarged flange portions at both ends, a coil winding wound around the cylindrical portion of the soft magnetic drum, and a soft magnetic drum surrounding the soft magnetic drum and fitted to the enlarged flange portion. An inductance component including a soft magnetic sleeve to be fitted together, wherein the temperature coefficients of the soft magnetic drum and the soft magnetic sleeve have opposite signs.
磁性スリーブの端面がほぼ同一の平面をなし、両巻線の
端部が前記平面に引き出されて膜状外部端子に接続され
ている請求項１に記載のインダクタ部品。2. The outer shape is cylindrical, and the end surfaces of the soft magnetic drum and the soft magnetic sleeve form substantially the same plane, and the ends of both windings are drawn out to the plane and connected to the film-shaped external terminal. The inductor component according to claim 1, wherein:
軟磁性スリーブの端面がほぼ同一の平面をなし、両巻線
の端部が前記平面に引き出されて膜状外部端子に接続さ
れている請求項１に記載のインダクタ部品。3. The external shape is a rectangular parallelepiped, the end faces of the soft magnetic drum and the soft magnetic sleeve form substantially the same plane, and the ends of both windings are drawn out to the plane and connected to a film-shaped external terminal. The inductor component according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5054591A JPH06251946A (en) | 1993-02-22 | 1993-02-22 | Inductor component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5054591A JPH06251946A (en) | 1993-02-22 | 1993-02-22 | Inductor component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06251946A true JPH06251946A (en) | 1994-09-09 |
Family
ID=12974974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5054591A Pending JPH06251946A (en) | 1993-02-22 | 1993-02-22 | Inductor component |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06251946A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003010784A1 (en) * | 2001-07-25 | 2003-02-06 | Pulsus Technologies Inc. | Magnetic core for inductor |
| JP2003168611A (en) * | 2001-09-18 | 2003-06-13 | Murata Mfg Co Ltd | High-frequency common mode choke coil |
| KR100525844B1 (en) * | 1998-10-27 | 2005-11-02 | 티디케이가부시기가이샤 | Surface mount self-induction component |
| JP2006156694A (en) * | 2004-11-29 | 2006-06-15 | Kyocera Corp | Surface mounting coil |
| WO2009044760A1 (en) * | 2007-10-02 | 2009-04-09 | Murata Manufacturing Co., Ltd. | Inductance element and method for manufacturing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61105586A (en) * | 1984-10-29 | 1986-05-23 | 日本電気株式会社 | Character pattern generator |
| JPH0364010A (en) * | 1989-08-01 | 1991-03-19 | Furukawa Co Ltd | Magnetic dust core with improved temperature characteristic |
-
1993
- 1993-02-22 JP JP5054591A patent/JPH06251946A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61105586A (en) * | 1984-10-29 | 1986-05-23 | 日本電気株式会社 | Character pattern generator |
| JPH0364010A (en) * | 1989-08-01 | 1991-03-19 | Furukawa Co Ltd | Magnetic dust core with improved temperature characteristic |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100525844B1 (en) * | 1998-10-27 | 2005-11-02 | 티디케이가부시기가이샤 | Surface mount self-induction component |
| WO2003010784A1 (en) * | 2001-07-25 | 2003-02-06 | Pulsus Technologies Inc. | Magnetic core for inductor |
| JP2003168611A (en) * | 2001-09-18 | 2003-06-13 | Murata Mfg Co Ltd | High-frequency common mode choke coil |
| US6965289B2 (en) | 2001-09-18 | 2005-11-15 | Murata Manufacturing Co., Ltd. | Common-mode choke coil |
| JP2006156694A (en) * | 2004-11-29 | 2006-06-15 | Kyocera Corp | Surface mounting coil |
| WO2009044760A1 (en) * | 2007-10-02 | 2009-04-09 | Murata Manufacturing Co., Ltd. | Inductance element and method for manufacturing the same |
| US8111124B2 (en) | 2007-10-02 | 2012-02-07 | Murata Manufacturing Co., Ltd. | Inductance element and method for manufacturing the same |
| JP5287724B2 (en) * | 2007-10-02 | 2013-09-11 | 株式会社村田製作所 | Inductance element and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19970819 |