JPH03101106A - Inductance element - Google Patents
Inductance elementInfo
- Publication number
- JPH03101106A JPH03101106A JP23576289A JP23576289A JPH03101106A JP H03101106 A JPH03101106 A JP H03101106A JP 23576289 A JP23576289 A JP 23576289A JP 23576289 A JP23576289 A JP 23576289A JP H03101106 A JPH03101106 A JP H03101106A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- laminated
- coil
- inductance element
- magnetic 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.)
- Pending
Links
- 239000004020 conductor Substances 0.000 claims abstract description 15
- 239000011230 binding agent Substances 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 239000006247 magnetic powder Substances 0.000 abstract description 3
- SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052709 silver Inorganic materials 0.000 abstract description 3
- 239000004332 silver Substances 0.000 abstract description 3
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 12
- 239000000696 magnetic material Substances 0.000 description 6
- 230000005415 magnetization Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はインダクタンス素子に関し、特にチョークコイ
ルなどの片側磁界（電流方向が正方向のみ又は負方向の
みの電流により生じる磁界）中で使用される積層コイル
タイプのインダクタンス素子に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an inductance element, and particularly to an inductance element used in a one-sided magnetic field (a magnetic field generated by a current in only a positive direction or only in a negative direction) such as a choke coil. This invention relates to a laminated coil type inductance element.
（従来技術とその問題点）
従来の有芯インダクタンス素子は、積層コイルを例にと
って説明すると第１図の構造を有する。(Prior art and its problems) A conventional cored inductance element has a structure shown in FIG. 1, taking a laminated coil as an example.
同図において、積層コイルは磁性フェライト等の軟磁性
体の粉末とバインダーを混合したペースト層と、銅、銀
、銀−パラジウム等の導電粉末をバインダーと混合した
導電ペーストとを、スクリーン印刷法等により交互に印
刷又は積層して磁性層の積層体中に導体がコイル状に周
回するようにし、得られた積層体を高温度で焼結して一
体的な焼結積層コイルとする。得られた積層コイルは第
１図のような断面構造を有し、焼結積層磁性体１の内部
にコイル導体２が周回しており、等測的には第２図の回
路構成となる。インダクタンス素子導体２に電流が流れ
ると磁束φがコイル導体の周りを通る閉磁路を形成する
。In the same figure, the laminated coil is made by screen printing, etc., using a paste layer in which a binder is mixed with powder of a soft magnetic material such as magnetic ferrite, and a conductive paste in which a conductive powder such as copper, silver, silver-palladium, etc. is mixed with a binder. The magnetic layers are alternately printed or laminated so that the conductor coils around the magnetic layer laminate, and the resulting laminate is sintered at high temperature to form an integral sintered laminate coil. The obtained laminated coil has a cross-sectional structure as shown in FIG. 1, with a coil conductor 2 circulating inside a sintered laminated magnetic material 1, and isometrically has a circuit configuration as shown in FIG. 2. When a current flows through the inductance element conductor 2, a magnetic flux φ forms a closed magnetic path passing around the coil conductor.
上記の構造のインダクタンス素子はチョークコイルなど
の片側磁界（電流方向が正又は負のみの交流印加電流に
よって発生する磁界）中で使用されることがあり、この
ような用途では、インダクタンス素子のＢ−Ｈ（磁束密
度−磁界）曲線は第３図に斜線部分で示したようになる
。コイル導体２に電流を流すと磁界が発生し、それによ
り磁性体ｌには磁束が発生する。電流を増大させるとや
がて磁性体は磁束密度Ｂ、で飽和する。この時の印加磁
界△Ｈに相当する電流工＝△Ｈ／Ｎ （Ｎはコイル導体
の巻数）が積層コイルの許容電流となる。そして磁束密
度の変化範囲もΔＢに限定される。このように磁性体の
磁気飽和のため、積層コイル等のインダクタンス素子の
許容電流は制限されてしまい、更に大きい電流を使用す
ることは不可能である。The inductance element with the above structure is sometimes used in a one-sided magnetic field (a magnetic field generated by an applied alternating current with only positive or negative current direction) such as in a choke coil, and in such applications, the B- The H (magnetic flux density-magnetic field) curve is shown in the shaded area in FIG. When a current is passed through the coil conductor 2, a magnetic field is generated, and thereby a magnetic flux is generated in the magnetic body l. As the current increases, the magnetic material eventually becomes saturated at the magnetic flux density B. The current equivalent to the applied magnetic field ΔH at this time = ΔH/N (N is the number of turns of the coil conductor) is the allowable current of the laminated coil. The range of change in magnetic flux density is also limited to ΔB. As described above, due to the magnetic saturation of the magnetic material, the permissible current of an inductance element such as a laminated coil is limited, and it is impossible to use a larger current.
（発明の目的）
従って、本発明の目的は増大した電流でも飽和すること
なく作動し得るインダクタンス素子、特に積層コイルを
提供することにある。(Object of the Invention) Therefore, an object of the present invention is to provide an inductance element, particularly a laminated coil, which can operate without saturation even with increased current.
本発明の他の目的は同一の磁性材料を使用した場合に、
従来のインダクタンス素子よりも大きい許容電流を有す
るインダクタンス素子、特に積層コイルを提供すること
にある。Another object of the present invention is that when using the same magnetic material,
An object of the present invention is to provide an inductance element, particularly a laminated coil, which has a larger allowable current than conventional inductance elements.
（発明の構成と作用効果の概要）
本発明の上記目的は、本発明の特殊構成のインダクタン
ス素子によって達成される。(Summary of Structure and Effects of the Invention) The above objects of the present invention are achieved by an inductance element having a special structure of the present invention.
本発明のインダクタンス素子は、軟磁性磁心と、前記磁
心に磁路を形成する導電コイルと、前記磁路内に前記磁
心の一部を置換する形で配置された永久磁石と、よりな
るインダクタ素子である。 本発明のインダクタンス素
子は軟磁性磁心が電流による磁界とは逆の方向のバイア
ス磁界によって常時匍逆磁化されているために、零電流
でのＢ−Ｈ曲線上の点は負に偏っており、このため片側
磁界に対して従来よりも飽和しにく、大きい許容電流を
有するインダクタンス素子が提供出来る。An inductance element of the present invention includes a soft magnetic core, a conductive coil forming a magnetic path in the magnetic core, and a permanent magnet disposed in the magnetic path to replace a part of the magnetic core. It is. In the inductance element of the present invention, since the soft magnetic core is always demagnetized by the bias magnetic field in the opposite direction to the magnetic field caused by the current, the point on the B-H curve at zero current is biased negatively. Therefore, it is possible to provide an inductance element that is less likely to be saturated with a one-sided magnetic field than before and has a large allowable current.
（発明の詳細な説明） 以下に第４〜５図を参照して本発明の詳細な説明する。(Detailed description of the invention) The present invention will be described in detail below with reference to FIGS. 4 and 5.
第４図は本発明によるインダクタンス素子の一実施例を
示し、特に本実施例は積層コイルとして具体化されてい
る。積層コイルは軟磁性磁性フェライトの粉末とバイン
ダーを混合したペースト層と、銅、銀、銀−パラジウム
等の導電粉末をバインダーと混合した導電ペーストとを
、スクリーン印刷法等により交互に層状に印刷又は積層
して磁性層の積層体中に導体がコイル状に周回するよう
にする。このような積層コイルの製造方法は、特公昭６
３−１４４８７号等に記載されているので詳しくはそち
らを参照されたい。本発明では上記の積層工程の途中に
おいて、磁心の磁路となる任意の部分に永久磁石用磁性
粉末例えばバリウムフェライトを焼成で実質的に揮発し
得るプラスチックバインダーと混練したペーストの層を
所定数積層する工程を付加する。次いで全体を焼成して
焼結型積層コイルとする。なお、コイル導体の外部端子
を積層コイル周部に焼き付ける等の仕上工程が必要であ
るが周知である。ので省略する。その他、本発明の構造
が得られるなら任意の他の製造方法を使用出来る。FIG. 4 shows an embodiment of an inductance element according to the present invention, and in particular, this embodiment is embodied as a laminated coil. The laminated coil is made by printing or printing alternating layers of a paste layer made of a mixture of soft magnetic ferrite powder and a binder and a conductive paste made of a binder mixed with conductive powder such as copper, silver, silver-palladium, etc. using a screen printing method or the like. The magnetic layers are laminated so that a conductor is wound around the magnetic layer in a coiled manner. The manufacturing method for such laminated coils was developed in
3-14487, etc., so please refer there for details. In the present invention, in the middle of the above-mentioned lamination step, a predetermined number of layers of paste made by kneading magnetic powder for permanent magnets, such as barium ferrite, with a plastic binder that can be substantially volatilized by firing are laminated on any part of the magnetic core that will become the magnetic path. Add a process to The whole is then fired to form a sintered laminated coil. Note that a finishing process such as baking the external terminal of the coil conductor onto the periphery of the laminated coil is required, but this is well known. Therefore, it will be omitted. In addition, any other manufacturing method can be used as long as the structure of the present invention is obtained.
得られた本発明の積層コイルの構造は断面を示す第４図
に示される。積層コイルは軟磁性フェライトの積層焼結
体よりなる磁性体（磁心）１と、その中を周回するコイ
ル導体２と、磁性体１の内部の磁路内に配置された積層
磁石３とよりなる。The structure of the obtained laminated coil of the present invention is shown in FIG. 4, which shows a cross section. The laminated coil consists of a magnetic body (magnetic core) 1 made of a laminated sintered body of soft magnetic ferrite, a coil conductor 2 circulating inside the magnetic body, and a laminated magnet 3 arranged in a magnetic path inside the magnetic body 1. .
焼結して得た積層コイルには焼結後に磁石３のための着
磁磁界を印加すべき電流から生じる磁束とは反対の磁束
を生じるように作用させて永久磁石とする。着磁磁界は
磁性体ｌの飽和磁化よりもはるかに大きいから磁性体ｌ
による遮蔽効果はな（て容易に積層磁石３の着磁が行え
る。After sintering, the laminated coil obtained by sintering is made into a permanent magnet by applying a magnetizing magnetic field for the magnet 3 so as to generate a magnetic flux opposite to the magnetic flux generated from the current to be applied. The magnetizing field is much larger than the saturation magnetization of the magnetic material l.
The laminated magnet 3 can be easily magnetized without any shielding effect.
（作用効果）
コイル導体２に電流が流れると磁束φ１がコイル導体の
周りを通る閉磁路を形成する。一方磁石３の作る磁束φ
２は磁束φ１とは逆方向となる。(Operation and Effect) When a current flows through the coil conductor 2, the magnetic flux φ1 forms a closed magnetic path passing around the coil conductor. On the other hand, the magnetic flux φ created by magnet 3
2 is in the opposite direction to the magnetic flux φ1.
第５図を参照するに、磁性体１の磁気特性は第３図に示
したものと同様であるとすると、磁束φ２は磁界Ｈｍａ
ｇによって絶えず発生している。Referring to FIG. 5, assuming that the magnetic properties of the magnetic body 1 are the same as those shown in FIG. 3, the magnetic flux φ2 is equal to the magnetic field Hma
It is constantly occurring due to g.
コイル導体２に電流の流れない状態においては永久磁石
の磁界のため磁化曲線はＡの点にあり、電流が加わると
次第に磁化し印加磁界が第３図の場合の磁界△Ｈに更に
磁界Ｈｍａｇを加えた△Ｈ。When no current flows through the coil conductor 2, the magnetization curve is at point A due to the magnetic field of the permanent magnet, and when a current is applied, it gradually becomes magnetized and the applied magnetic field becomes the magnetic field △H as shown in Fig. 3, and the magnetic field Hmag. Added △H.
△ｌ（＋ Ｈｍａｇの時に初めて飽和することになり許
容電流は増大する。それに対応して磁束密度の変化範囲
△Ｂ° も△Ｂよりも大きくなる。Saturation occurs for the first time when Δl(+Hmag), and the allowable current increases. Correspondingly, the range of change in magnetic flux density ΔB° also becomes larger than ΔB.
上記の構造のインダクタンス素子はチョークコイルなど
の片側磁界（電流方向が一定）中で使用されるのに適し
ており、従来のものに比してはるかに大きい印加電流を
許容する。The inductance element with the above structure is suitable for use in a one-sided magnetic field (current direction is constant) such as in a choke coil, and allows a much larger applied current than conventional ones.
以上のように本発明によれば、片側磁界用の優れたイン
ダクタンス素子が提供出来ることがわかる。As described above, it can be seen that according to the present invention, an excellent inductance element for one-sided magnetic field can be provided.
４・ ′ の な２０
第１図は従来のインダクタンス素子の構造を示す断面図
、第２図は同等化回路図、第３図は従来のインダクタン
ス素子を片側磁界で使用した場合の磁化曲線を示すグラ
フ、第４図は本発明の実施例によるインダクタンス素子
の構造を示す断面図、及び第５図は本発明のインダクタ
ンス素子を片側磁界で使用した場合の磁化曲線を示すグ
ラフである。4. 20 Figure 1 is a cross-sectional view showing the structure of a conventional inductance element, Figure 2 is an equivalent circuit diagram, and Figure 3 is a magnetization curve when a conventional inductance element is used in a magnetic field on one side. FIG. 4 is a cross-sectional view showing the structure of an inductance element according to an embodiment of the present invention, and FIG. 5 is a graph showing a magnetization curve when the inductance element of the present invention is used in a one-sided magnetic field.
Claims (1)
体と、前記磁路内に前記磁心の一部を置換する形で配置
された永久磁石と、よりなるインダクタンス素子。1) An inductance element comprising a soft magnetic core, a coil conductor forming a magnetic path in the magnetic core, and a permanent magnet disposed in the magnetic path to replace a part of the magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23576289A JPH03101106A (en) | 1989-09-13 | 1989-09-13 | Inductance element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23576289A JPH03101106A (en) | 1989-09-13 | 1989-09-13 | Inductance element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03101106A true JPH03101106A (en) | 1991-04-25 |
Family
ID=16990861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23576289A Pending JPH03101106A (en) | 1989-09-13 | 1989-09-13 | Inductance element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03101106A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006294733A (en) * | 2005-04-07 | 2006-10-26 | Nec Tokin Corp | Inductor and its manufacturing method |
| KR20160021087A (en) | 2013-06-19 | 2016-02-24 | 에프디케이 가부시키가이샤 | Stacked inductor |
| CN107481833A (en) * | 2017-07-12 | 2017-12-15 | 华为机器有限公司 | A kind of film coupling inductance and power-switching circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5030047A (en) * | 1973-07-23 | 1975-03-26 | ||
| JPS50133453A (en) * | 1974-04-10 | 1975-10-22 |
-
1989
- 1989-09-13 JP JP23576289A patent/JPH03101106A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5030047A (en) * | 1973-07-23 | 1975-03-26 | ||
| JPS50133453A (en) * | 1974-04-10 | 1975-10-22 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006294733A (en) * | 2005-04-07 | 2006-10-26 | Nec Tokin Corp | Inductor and its manufacturing method |
| KR20160021087A (en) | 2013-06-19 | 2016-02-24 | 에프디케이 가부시키가이샤 | Stacked inductor |
| US9653203B2 (en) | 2013-06-19 | 2017-05-16 | Fdk Corporation | Multilayer inductor |
| CN107481833A (en) * | 2017-07-12 | 2017-12-15 | 华为机器有限公司 | A kind of film coupling inductance and power-switching circuit |
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