JPH0281410A - Current control type laminated inductor - Google Patents
Current control type laminated inductorInfo
- Publication number
- JPH0281410A JPH0281410A JP23286788A JP23286788A JPH0281410A JP H0281410 A JPH0281410 A JP H0281410A JP 23286788 A JP23286788 A JP 23286788A JP 23286788 A JP23286788 A JP 23286788A JP H0281410 A JPH0281410 A JP H0281410A
- Authority
- JP
- Japan
- Prior art keywords
- conductor pattern
- magnetic
- conductor
- current
- pattern
- 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
- 239000004020 conductor Substances 0.000 claims abstract description 80
- 238000003475 lamination Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 30
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 238000010030 laminating Methods 0.000 abstract description 3
- SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 2
- 230000001788 irregular Effects 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010291 electrical method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、積層インダクタの構造に係るもので特に、電
流によって磁界を変化させ、インダクタンスを変えるご
とのできる電流制御型積層インダクタに関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a laminated inductor, and particularly relates to a current-controlled laminated inductor in which the magnetic field is changed by electric current, and the inductance can be changed each time the inductance is changed. .
インダクタには固定のものと可変のものがあるが、一般
にインダクタンス値を変えるためには、磁性体のコアを
挿入する方法が採られている。積層インダクタにおいて
も、コアを挿入する方法が考えられている。There are fixed types and variable types of inductors, but in order to change the inductance value, a method generally used is to insert a magnetic core. A method of inserting a core has also been considered for laminated inductors.
コアの挿入という機械的な方法でなく、電気的な方法で
インダクタンスを制御する方法も考えられている。例え
ば、特開昭６０−１６０１０６号公報には制御用コイル
を巻回した磁性体コアの巻線部に中空部を設け、その中
空部に同調コイルを巻回した磁性体コアを挿入したもの
が示されている。In addition to the mechanical method of inserting a core, methods of controlling inductance using electrical methods are also being considered. For example, JP-A-60-160106 discloses a method in which a hollow part is provided in the winding part of a magnetic core around which a control coil is wound, and a magnetic core around which a tuning coil is wound is inserted into the hollow part. It is shown.
上記のような巻線を施したインダクタだけでなく、積層
インダクタにおいても、実開昭６２−２１５１７号公報
に示されたように、インダクタの導体パターンの上下方
向に制御用インダクタを付加したものも考えられている
。In addition to the above-mentioned wire-wound inductors, there are also laminated inductors with control inductors added above and below the conductor pattern of the inductor, as shown in Japanese Utility Model Application Publication No. 62-21517. It is considered.
しかし、巻線を用いたタイプでは、インダクタの形状が
大きくなってしまい、最近要求されている小型化に対応
するのが難しい。However, in the type using a winding wire, the shape of the inductor becomes large, making it difficult to meet the recent demand for miniaturization.
また、組立の工数も多くなり、製造の自動化も難しい。Additionally, the number of assembly steps increases, making it difficult to automate manufacturing.
更に、機械的な強度、信鯨性の点でも特性のばらつきが
生じ易い。Furthermore, variations in properties tend to occur in terms of mechanical strength and reliability.
一方、積層インダクタにおいても、十分な可変範囲が得
られず、また製造工数の増加、歩留の低下などを生じて
いる。On the other hand, even in laminated inductors, a sufficient variable range cannot be obtained, and the number of manufacturing steps increases and yields decrease.
本発明は、制御用コイルパターンの配置を変えることに
よって十分な制御を可能とし、上記の課題を解決するも
のである。The present invention enables sufficient control by changing the arrangement of control coil patterns and solves the above problems.
すなわち、磁性体層間に、端部が接続されて積層方向に
重畳して周回する第一の導体パターンを具え、該第一の
導体パターンの磁気回路の磁界を制御するバイアス印加
手段を具えた電流制御型積層インダクタにおいて、該第
一の導体パターンに近接した、磁性体層間を端部が接続
されて積層方向に重畳して周回する、該第一の導体パタ
ーンにバイアスを印加するための第二の導体パターンを
具えたことに特徴を有するものである。That is, the electric current is provided with a first conductor pattern between the magnetic layers, the ends of which are connected and which circulate in an overlapping manner in the stacking direction, and a bias application means for controlling the magnetic field of the magnetic circuit of the first conductor pattern. In the controlled laminated inductor, a second conductor pattern for applying a bias to the first conductor pattern, which is close to the first conductor pattern, has its ends connected between the magnetic layers, and circulates in an overlapping manner in the lamination direction. It is characterized by having a conductor pattern.
第二の導体パターンを第一の導体パターンの外側に配置
したり、導体パターン間の磁性体層の材料を低透磁率材
料に置換したり、あるいは永久磁石を併用することによ
って、より効果を高めることもできる。The effect can be further enhanced by arranging the second conductor pattern outside the first conductor pattern, replacing the material of the magnetic layer between the conductor patterns with a low magnetic permeability material, or using a permanent magnet together. You can also do that.
二つの導体パターンは、水平方向に近接させて同心円状
に配置しても、交互に垂直方向（積層方向）に入り組ん
だ構造としてもよい。The two conductor patterns may be arranged concentrically in close proximity to each other in the horizontal direction, or may be arranged in a structure in which they are alternately intertwined in the vertical direction (the stacking direction).
第二の導体パターンがインダクタの制御巻線になり、第
一の主巻線の周囲の磁界に変化を生じさせる。第二の導
体パターンには直流電流がバイアスとして印加されるの
で、導体パターンの内側および外側に積層方向に磁界が
発生する。The second conductor pattern becomes the control winding of the inductor and causes a change in the magnetic field around the first main winding. Since a direct current is applied as a bias to the second conductor pattern, a magnetic field is generated inside and outside the conductor pattern in the lamination direction.
第二の導体パターンによって生じた磁界は、第一の導体
パターンの磁路の磁界に変化を生じる。The magnetic field generated by the second conductor pattern causes a change in the magnetic field of the magnetic path of the first conductor pattern.
それによって、第一の導体パターンはインダクタンス値
が変化する。これを利用して、第二の導体パターンに印
加するバイアス電流によって、第一の導体パターンによ
るインダクタのインダクタンスを可変するものである。As a result, the inductance value of the first conductor pattern changes. Utilizing this, the inductance of the inductor formed by the first conductor pattern is varied by the bias current applied to the second conductor pattern.
以下、図面を参照して、本発明の実施例について説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
第１図は、本発明の実施例を示す正面断面図である。フ
ェライト等の磁性体層ｌＯ内に銀−パラジウム等による
導体パターン１１．１２が端部を接続されながら周回し
、積層方向に重畳して生成される。FIG. 1 is a front sectional view showing an embodiment of the present invention. Conductor patterns 11 and 12 made of silver-palladium or the like are connected to each other at their ends and circulate around the magnetic layer 10 of ferrite or the like, and are formed so as to be overlapped in the stacking direction.
製造方法としては、ペーストを印刷する方法、あるいは
グリーンシートに導体パターンを印刷し、スルーホール
を通して接続する方法などがある。Manufacturing methods include a method of printing paste, or a method of printing a conductor pattern on a green sheet and connecting it through through holes.
いずれにせよ、コイル状の導体パターンが磁性体内に収
容された閉磁路型のインダクタが得られる。In any case, a closed magnetic circuit inductor in which a coiled conductor pattern is housed in a magnetic body is obtained.
本発明による積層インダクタにおいては、本来のインダ
クタとなる主巻線の導体パターン１１の他に、その周囲
に制御巻線となる導体パターン１２を具えている。これ
らの導体パターンは製造時に二つの導体パターンを同心
円状に形成し、順次積層すれば得られる。In the laminated inductor according to the present invention, in addition to the conductor pattern 11 of the main winding which becomes the original inductor, a conductor pattern 12 which becomes the control winding is provided around it. These conductor patterns can be obtained by forming two conductor patterns concentrically during manufacture and laminating them one after another.
図示しないが、主巻線の導体パターン１１の端部は入出
力端に、制御巻線の導体パターン１２の端部はバイアス
電流源に接続される。Although not shown, the end of the conductor pattern 11 of the main winding is connected to an input/output end, and the end of the conductor pattern 12 of the control winding is connected to a bias current source.
制御巻線の導体パターン１２に印加される直流バイアス
電流により、磁性体１０内の導体パターン１２の周囲に
は磁気回路が形成される。この磁気回路は主巻き線の導
体パターン１１によって形成される磁気回路と共通にな
る。したがって、制御巻線の導体パターン１２によって
発生した磁界は、主巻線の導体パターン１１の磁界に影
響を及ぼす。それによって、主巻線の導体パターン１１
のインダクタンスを可変する。A magnetic circuit is formed around the conductive pattern 12 within the magnetic body 10 by the DC bias current applied to the conductive pattern 12 of the control winding. This magnetic circuit is common to the magnetic circuit formed by the conductor pattern 11 of the main winding. Therefore, the magnetic field generated by the conductor pattern 12 of the control winding influences the magnetic field of the conductor pattern 11 of the main winding. Thereby, the conductor pattern 11 of the main winding
variable inductance.
第２図は、制御巻線に印加するバイアス電流とインダク
タンス値の関係を示す説明図である。このように、直流
バイアスを印加し、その電流を大きくして行くとインダ
クタンス値は低下する。所望のインダクタンス値に応じ
た直流バイアス電流を制御巻線の導体パターンに印加す
ればよい。FIG. 2 is an explanatory diagram showing the relationship between the bias current applied to the control winding and the inductance value. In this way, when a DC bias is applied and the current is increased, the inductance value decreases. A DC bias current corresponding to a desired inductance value may be applied to the conductor pattern of the control winding.
第３図は、本発明の他の実施例を示す正面断面図である
。磁性体３０、導体パターン３１．３２は前記と同様で
あるが、導体パターン３１．３２間の磁性体を、磁性体
３０よりも透磁率の低い材料の層３３に置換したもので
ある。これによって、導体パターン間に磁束が漏れるの
を防止するものである。FIG. 3 is a front sectional view showing another embodiment of the present invention. The magnetic material 30 and conductive patterns 31 and 32 are the same as those described above, but the magnetic material between the conductive patterns 31 and 32 is replaced with a layer 33 of a material having lower magnetic permeability than the magnetic material 30. This prevents magnetic flux from leaking between the conductor patterns.
ｉ３磁率の低い材料の層３３は必ずしも導体パターン間
全体に形成しなくてもよく、一部のみに形成してもよい
。言うまでもなく、非磁性体材料を用いてもよい。The layer 33 of the material with low i3 magnetic property does not necessarily have to be formed entirely between the conductor patterns, but may be formed only partially. Needless to say, non-magnetic materials may also be used.
第４図は、二つの導体パターンを交互に配置した例であ
る。磁性体４０内に主巻線の導体パターン４１と制御巻
線の導体パターン４２が交互に配置されて積層されてい
る。この場合にも、二つの導体パターン４１．４２の磁
路が共通となり、バイアス電流によってインダクタンス
を富用整できる。ただし、製造上は工程が複雑となり、
工数が増加する問題はある。FIG. 4 is an example in which two conductor patterns are arranged alternately. In the magnetic body 40, conductor patterns 41 of the main winding and conductor patterns 42 of the control winding are alternately arranged and stacked. In this case as well, the magnetic paths of the two conductor patterns 41 and 42 become common, and the inductance can be adjusted efficiently by the bias current. However, the manufacturing process is complicated,
There is a problem with increased man-hours.
第５図は、二つのインダクタを一体に形成したものであ
る。磁性体５０内に主巻線となる導体パターン５１が二
つ形成され、それぞれの周囲に制御巻線となる導体パタ
ーン５２が形成されている。制御巻線となる導体パター
ン５２の端部同士は接続されている。また、制御巻線と
なる導体パターン５２は電流の方向が逆になるように接
続するとよい。それによって、隣接する制御巻線の導体
パターン５２でそれぞれ発生する磁界が逆方向となり、
打ち消し合うためである。FIG. 5 shows two inductors formed integrally. Two conductor patterns 51 serving as main windings are formed within the magnetic body 50, and a conductor pattern 52 serving as a control winding is formed around each conductor pattern 51. The ends of the conductor pattern 52, which forms the control winding, are connected to each other. Further, the conductor pattern 52 serving as the control winding is preferably connected so that the direction of the current is reversed. As a result, the magnetic fields generated in the conductor patterns 52 of adjacent control windings are in opposite directions,
This is to cancel each other out.
これによって、二つのインダクタに共通のバイアス電流
を印加することができ、制御巻線の導体パターン５２に
ついては二個の端部電極で済ませることができる。また
、二個のインダクタの特性を揃えることが容易となり、
チューナ用などとして有用なインダクタが得られる。Thereby, a common bias current can be applied to the two inductors, and two end electrodes can be used for the conductor pattern 52 of the control winding. Also, it becomes easier to match the characteristics of the two inductors,
An inductor useful for tuners etc. can be obtained.
第６図は、永久磁石を組み合わせた例を示している。磁
性体６０に主巻線となる導体パターン６１と制御巻線と
なる導体パターン６２を形成するとともに、積層方向の
端面の中央部に凹部を設け、永久磁石６４を挿入したも
のである。これによって、第７図のように、第２図に示
した例と比較して、永久磁石のバイアス分インダクタン
ス値の変化を変えることが可能となる。もちろん、磁石
の極性などを変えることによって、制御特性を任意に設
定できる。FIG. 6 shows an example in which permanent magnets are combined. A conductor pattern 61 serving as a main winding and a conductor pattern 62 serving as a control winding are formed on a magnetic body 60, and a recess is provided in the center of the end face in the stacking direction, and a permanent magnet 64 is inserted. As a result, as shown in FIG. 7, it is possible to change the change in inductance value by the bias of the permanent magnet compared to the example shown in FIG. Of course, the control characteristics can be set arbitrarily by changing the polarity of the magnet.
本発明によれば、小型のモノリシック構造の電流制御型
積層インダクタが得られる。According to the present invention, a small monolithic current-controlled multilayer inductor can be obtained.
印刷等自動化が可能な製造方法により得ることができる
ので、工数、コストの面でも優れた電流制御型積層イン
ダクタが得られる。Since it can be obtained by a manufacturing method that can be automated, such as printing, a current-controlled multilayer inductor that is excellent in terms of man-hours and costs can be obtained.
更に、特性のばらつきもなく、信頼性の高い素子を得る
ことができる。Furthermore, a highly reliable device can be obtained without variations in characteristics.
第１図、第３図から第６図は本発明の実施例を示す正面
断面図、第２図と第７図はその特性の説明図である。FIGS. 1, 3 to 6 are front sectional views showing embodiments of the present invention, and FIGS. 2 and 7 are explanatory diagrams of its characteristics.
Claims (8)
して周回する第一の導体パターンを具え、該第一の導体
パターンの磁気回路の磁界を制御するバイアス印加手段
を具えた電流制御型積層インダクタにおいて、該第一の
導体パターンに近接し、磁性体層間を端部が接続されて
積層方向に重畳して周回する、該第一の導体パターンに
バイアスを印加するための第二の導体パターンを具えた
ことを特徴とする電流制御型積層インダクタ。(1) A first conductor pattern is provided between the magnetic layers, the end portions of which are connected and overlap in the stacking direction, and includes a bias applying means for controlling the magnetic field of the magnetic circuit of the first conductor pattern. In the current-controlled multilayer inductor, a first conductor pattern for applying a bias to the first conductor pattern, which is close to the first conductor pattern, has its ends connected between the magnetic layers, and circulates in an overlapping manner in the lamination direction. A current-controlled multilayer inductor characterized by having two conductor patterns.
じ磁性体層間を平行に周回しながら積層された請求項第
１項記載の電流制御型積層インダクタ。(2) The current-controlled multilayer inductor according to claim 1, wherein the first conductor pattern and the second conductor pattern are laminated while circulating in parallel between the same magnetic layers.
外側に形成された請求項第１項記載の電流制御型積層イ
ンダクタ。(3) The current-controlled multilayer inductor according to claim 1, wherein the second conductor pattern is formed outside the first conductor pattern.
磁性体層を介在して交互に積層された請求項第１項記載
の電流制御型積層インダクタ。(4) The current-controlled multilayer inductor according to claim 1, wherein the first conductor pattern and the second conductor pattern are alternately laminated with a magnetic layer interposed therebetween.
導体パターン間の少なくとも一部が該磁性体層よりも透
磁率の低い材料で置換された請求項第１項記載の電流制
御型積層インダクタ。(5) The current control type according to claim 1, wherein at least a portion between the conductor patterns of the first conductor pattern and the second conductor pattern is replaced with a material having lower magnetic permeability than the magnetic layer. laminated inductor.
して周回する複数の第一の導体パターンを具え、該第一
の導体パターンの磁気回路の磁界を制御するバイアス印
加手段を具えた電流制御型積層インダクタにおいて、該
第一の導体パターンに近接し、磁性体層間を端部が接続
されて積層方向に重畳して周回する、該第一の導体パタ
ーンにバイアスを印加するための複数の第二の導体パタ
ーンを具えたことを特徴とする電流制御型積層インダク
タ。(6) A plurality of first conductor patterns are provided between the magnetic layers, the ends of which are connected to each other and which circulate in an overlapping manner in the stacking direction, and a bias applying means for controlling the magnetic field of the magnetic circuit of the first conductor patterns. In the current-controlled multilayer inductor, for applying a bias to the first conductor pattern, which is close to the first conductor pattern, has its ends connected between the magnetic layers, and circulates in an overlapping manner in the lamination direction. A current-controlled multilayer inductor comprising a plurality of second conductor patterns.
反対方向にバイアス電流が印加され、発生する磁界が逆
方向になるように接続された請求項第６項記載の電流制
御型積層インダクタ。(7) The current-controlled laminated layer according to claim 6, wherein adjacent ones of the second plurality of conductor patterns are connected so that bias currents are applied in opposite directions so that the generated magnetic fields are in opposite directions. inductor.
して周回する第一の導体パターンを具え、該第一の導体
パターンの磁気回路の磁界を制御するバイアス印加手段
を具えた電流制御型積層インダクタにおいて、該第一の
導体パターンに近接し、磁性体層間を端部が接続されて
積層方向に重畳して周回する、該第一の導体パターンに
バイアスを印加するための第二の導体パターンを具え、
該積層方向の端面の中央に凹部を設け、該凹部に永久磁
石を挿入したことを特徴とする電流制御型積層インダク
タ。(8) A first conductor pattern is provided between the magnetic layers, the end portions of which are connected and which circulate in an overlapping manner in the stacking direction, and a bias application means for controlling the magnetic field of the magnetic circuit of the first conductor pattern. In the current-controlled multilayer inductor, a first conductor pattern for applying a bias to the first conductor pattern, which is close to the first conductor pattern, has its ends connected between the magnetic layers, and circulates in an overlapping manner in the lamination direction. comprising two conductor patterns,
A current-controlled multilayer inductor characterized in that a recess is provided at the center of the end face in the lamination direction, and a permanent magnet is inserted into the recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23286788A JPH0281410A (en) | 1988-09-17 | 1988-09-17 | Current control type laminated inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23286788A JPH0281410A (en) | 1988-09-17 | 1988-09-17 | Current control type laminated inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0281410A true JPH0281410A (en) | 1990-03-22 |
| JPH0522368B2 JPH0522368B2 (en) | 1993-03-29 |
Family
ID=16946069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23286788A Granted JPH0281410A (en) | 1988-09-17 | 1988-09-17 | Current control type laminated inductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0281410A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6597270B2 (en) * | 2001-02-19 | 2003-07-22 | Murata Manufacturing Co., Ltd. | Multilayer impedance component |
| JP2007123785A (en) * | 2005-10-31 | 2007-05-17 | Taiyo Yuden Co Ltd | Variable inductor and antenna device using it |
| WO2014203447A1 (en) * | 2013-06-19 | 2014-12-24 | Fdk株式会社 | Stacked inductor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58162018A (en) * | 1982-03-23 | 1983-09-26 | Tdk Corp | Preparation of laminated transformer |
| JPS5922304A (en) * | 1982-07-28 | 1984-02-04 | Tdk Corp | Laminated transformer |
| JPS5928305A (en) * | 1982-08-10 | 1984-02-15 | Toko Inc | Inductance element and manufacture thereof |
| JPS625620U (en) * | 1985-06-25 | 1987-01-14 | ||
| JPS6221517U (en) * | 1985-07-24 | 1987-02-09 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5783287A (en) * | 1980-11-14 | 1982-05-25 | Kyowa Hakko Kogyo Co Ltd | Elimination of hydrogen peroxide |
| JPS5854941A (en) * | 1981-09-29 | 1983-04-01 | 株式会社島津製作所 | Ultrasonic diagnostic apparatus |
-
1988
- 1988-09-17 JP JP23286788A patent/JPH0281410A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58162018A (en) * | 1982-03-23 | 1983-09-26 | Tdk Corp | Preparation of laminated transformer |
| JPS5922304A (en) * | 1982-07-28 | 1984-02-04 | Tdk Corp | Laminated transformer |
| JPS5928305A (en) * | 1982-08-10 | 1984-02-15 | Toko Inc | Inductance element and manufacture thereof |
| JPS625620U (en) * | 1985-06-25 | 1987-01-14 | ||
| JPS6221517U (en) * | 1985-07-24 | 1987-02-09 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6597270B2 (en) * | 2001-02-19 | 2003-07-22 | Murata Manufacturing Co., Ltd. | Multilayer impedance component |
| JP2007123785A (en) * | 2005-10-31 | 2007-05-17 | Taiyo Yuden Co Ltd | Variable inductor and antenna device using it |
| WO2014203447A1 (en) * | 2013-06-19 | 2014-12-24 | Fdk株式会社 | Stacked inductor |
| JP2015005548A (en) * | 2013-06-19 | 2015-01-08 | Fdk株式会社 | Multilayer inductor |
| US9653203B2 (en) | 2013-06-19 | 2017-05-16 | Fdk Corporation | Multilayer inductor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0522368B2 (en) | 1993-03-29 |
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