JPH0696954A

JPH0696954A - Micro-wire inductance element

Info

Publication number: JPH0696954A
Application number: JP14320091A
Authority: JP
Inventors: Yoshiaki Kobayashi; 義昭小林; Kiwamu Shirakawa; 究白川; Koichi Murakami; 孝一村上
Original assignee: AMORPHOUS DENSHI DEVICE KENKYU; AMORPHOUS DENSHI DEVICE KENKYUSHO KK
Current assignee: AMORPHOUS DENSHI DEVICE KENKYU; AMORPHOUS DENSHI DEVICE KENKYUSHO KK
Priority date: 1991-06-14
Filing date: 1991-06-14
Publication date: 1994-04-08
Anticipated expiration: 2010-05-31
Also published as: JPH0750657B2

Abstract

PURPOSE:To make the working frequency of an element higher and to optimize the magnetic core and excitation conductor of the element so as to reduce the size of the element by making the diameter of the thin wire magnetic core smaller than a specific value and forming the magnetic core of one wire or by bundling numerous thin wires. CONSTITUTION:A magnetic core 11 is formed by bundling extremely thin amorphous wires manufactured by chemical etching or thin-wire drawing and having a diameter of <=10mum. An excitation conductor 12 is wound around a group of or a plurality of groups of cores 11 thus formed in a toroidal or textile structure. By twisting conductors under a skin effect, an inductance element having a high Q-value and can be used for a high frequency can be obtained, since the inductance element cannot be used for a frequency equal to or higher than 10MHz due to a skin effect when the inductance element is constituted of a thick excitation conductor and, even when thin excitation conductors under a skin effect are used, the Q-value does not increase due to a DC resistance. Therefore, the copper loss and iron loss of the inductance element in a high-frequency region can be reduced and the inductance element can be increased in working frequency and Q-value.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は細線磁心、細線励磁導体
を用いたインダクタンス素子に係り、特に高周波数化、
マイクロ化のための磁心及び励磁導体を最適にしたマイ
クロワイヤインダクタンス素子に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin wire core and an inductance element using a thin wire exciting conductor, and particularly to a high frequency,
The present invention relates to a micro wire inductance element having an optimized magnetic core and exciting conductor for micronization.

【０００２】[0002]

【従来の技術】従来のアモルファスワイヤ磁心を用いた
インダクタンス素子に於いて、アモルファスワイヤは回
転紡維法等で作製しダイスで細線引きしたものを用いて
いるため、アモルファスワイヤの直径は１０μｍ以上で
あった。これらのワイヤを束ねて磁心とした場合には高
周波領域では鉄損の増加のため、アモルファスワイヤを
用いたインダクタンス素子の使用周波数は１０ＫＨｚ程
度までと考えられてきた。太いアモルファス線（直径１
０μｍ以上）を束ねて用いた場合には自動的にコイルを
巻く時の張力の関係により励磁導体としては例えば直径
５０〜１００μｍと太い導線を用いることが必要であ
り、従って、実用可能な素子寸法は必然的に大きくなり
マイクロ化には限界があった。又、太い励磁導体を用い
ることは表皮効果により、高周波領域での銅損の増加を
招きＱは向上せず、高い周波数までの使用を不可能にし
ていた。インダクタンス素子としてインダクタを例にと
り詳細に説明する。例えば、ＩＥＥＥＴｒａｎｓ．ｏ
ｎＭａｇ．ＭＡＧ−２２４１５（１９８６）に発表
されているように、図４に示すようなアモルファス線１
を緯線とし、励磁導体２を経線とする織物構造インダク
タにおいて、直径２０μｍのアモルファス線３２本を緯
線とし、直径７０μｍの励磁導体を経線として用いた場
合のインダクタンス及びＱの周波数特性を図５に示す。
図５から分かるように、Ｑの最大値を示す周波数はおよ
そ１ＭＨｚである。またこの素子の幅は７ｍｍ、長さｌ
＝５ｍｍと大きい。このように太いアモルファス線及び
励磁導体を用いた場合には使用周波数は１〜２ＭＨｚが
限界であり、その素子の表面積も大きくなる。2. Description of the Related Art In an inductance element using a conventional amorphous wire magnetic core, since the amorphous wire is manufactured by a spinning fiber method and thinned with a die, the diameter of the amorphous wire is 10 μm or more. there were. When these wires are bundled to form a magnetic core, iron loss increases in the high frequency region, and it has been considered that the operating frequency of the inductance element using the amorphous wire is up to about 10 KHz. Thick amorphous wire (diameter 1
(0 μm or more) is used as a bundle, it is necessary to use a thick conductor wire with a diameter of 50 to 100 μm as the exciting conductor due to the relation of tension when the coil is automatically wound. Was inevitably large and there was a limit to miniaturization. Further, the use of a thick exciting conductor causes an increase in copper loss in the high frequency region due to the skin effect, and Q is not improved, making it impossible to use up to a high frequency. An inductor will be described as an example of the inductance element in detail. For example, IEEE Trans. o
n Mag. As disclosed in MAG-22 415 (1986), amorphous wire 1 as shown in FIG.
Fig. 5 shows the inductance and Q frequency characteristics when a woven structure inductor having a parallel line as the parallel line and the exciting conductor 2 as the meridian and 32 amorphous wires having a diameter of 20 µm as parallel lines and an exciting conductor having a diameter of 70 µm as the parallel line. .
As can be seen from FIG. 5, the frequency showing the maximum value of Q is about 1 MHz. The width of this element is 7 mm, and the length l
= 5 mm, which is large. When such a thick amorphous wire and exciting conductor are used, the usable frequency is limited to 1 to 2 MHz, and the surface area of the element becomes large.

【０００３】[0003]

【発明が解決しようとする課題】本発明は上記の実情に
鑑みてなされたもので、使用周波数の高周波数化、マイ
クロ化のための磁心及び励磁導体を最適にし得るマイク
ロワイヤインダクタンス素子を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a micro wire inductance element capable of optimizing a magnetic core and an exciting conductor for increasing the operating frequency and miniaturization. The purpose is to

【０００４】[0004]

【課題を解決するための手段】本発明は上記課題を解決
するために、絶縁膜で被覆した励磁導線を細線磁心に巻
く構成よりなるマイクロワイヤインダクタンス素子にお
いて、細線磁心の直径を１０μｍ以下とし、一本もしく
は多数本を束ねて磁心とするものである。また、多数本
を束ねた磁心を緯線とし、励磁導体の直径を１５μｍ以
下とし一本もしくは多数本束ねた励磁導体群を経線とし
て織物構造を形成するものである。In order to solve the above-mentioned problems, the present invention provides a microwire inductance element having a structure in which an exciting conductive wire covered with an insulating film is wound around a thin wire core, and the diameter of the thin wire core is 10 μm or less, One or many are bundled to form a magnetic core. Further, the weaving structure is formed by using a magnetic core formed by bundling a large number of wires as a latitude line, and setting the diameter of the exciting conductors to 15 μm or less and using a single or a large number of exciting conductor groups as a meridian.

【０００５】[0005]

【作用】上記手段により、表皮効果内の導線をよりあわ
せ励磁導線として用いることによりＱが高く、高周波化
されたインダクタンス素子が可能になる。又、磁心は極
細線を用いることにより、鉄損を低減でき、高周波数化
が可能になる。With the above-mentioned means, it is possible to realize an inductance element having a high Q and a high frequency by twisting the conductors in the skin effect and using them as an exciting conductor. Further, by using an ultrafine wire for the magnetic core, iron loss can be reduced and higher frequency can be achieved.

【０００６】[0006]

【実施例】以下図面を参照して本発明の実施例を詳細に
説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.

【０００７】本発明の実施例は、１００ＭＨｚ以上の高
周波領域での表皮効果を考慮し、励磁導体として直径１
５μｍ以下の絶縁膜で被覆した極細線銅線一本または複
数本のより線とし、化学エッチング（特願平１−１９８
３８９）や細線引きにより作製した直径１０μｍ以下の
アモルファス極細線を束ねて磁心とし、一群または複数
群の磁心に上記励磁導体をトロイダル状または織物構造
に巻くことにより、鉄損が少なく、また、使用周波数の
高いマイクロワイヤインダクタンス素子を得る。実施例１In the embodiment of the present invention, considering the skin effect in the high frequency region of 100 MHz or more, the diameter of the exciting conductor is 1 mm.
Chemical etching (Japanese Patent Application No. Hei 1-198)
389) or an amorphous ultrafine wire having a diameter of 10 μm or less produced by drawing to form a magnetic core, and the excitation conductor is wound around the magnetic core of one or more groups in a toroidal shape or a woven structure to reduce iron loss. A high frequency micro wire inductance element is obtained. Example 1

【０００８】図３中、点線は細線励磁導体群と細線アモ
ルファスワイヤ群を用いたインダクタの実施例の測定結
果である。励磁導体は絶縁膜で被覆されている有効銅線
直径５０μｍ３本である。磁心は直径１０μｍのアモル
ファスワイヤを１００本束ねて一群とし、１５群を用
い、織物構造に編んだインダクタのインダクタンス及び
Ｑの周波数特性である。図５との比較より分かるように
磁心を細線化することにより高周波数化が可能であるこ
とが分かる。実施例２In FIG. 3, the dotted line shows the measurement result of an embodiment of the inductor using the thin wire excitation conductor group and the thin wire amorphous wire group. The exciting conductor is an effective copper wire having a diameter of 50 μm3 and covered with an insulating film. The magnetic core has a frequency characteristic of the inductance and Q of an inductor knitted into a woven structure using 15 groups by bundling 100 amorphous wires each having a diameter of 10 μm. As can be seen from the comparison with FIG. 5, it is possible to increase the frequency by thinning the magnetic core. Example 2

【０００９】図３中、実線は極細線励磁導体群と極細線
アモルファスワイヤ群を用いたインダクタの実施例の測
定結果である。励磁導体は絶縁膜で被覆されている有効
銅線直径１０μｍ３本である。磁心は直径約５μｍのア
モルファスワイヤを１００本束ねて一群とし、１５群を
用い、織物構造に編んだインダクタのインダクタンス及
びＱの周波数特性である。銅線群及び磁心群双方を極細
線化することにより、より高周波数化、高Ｑ化が実現出
来る。又素子寸法も１×２ｍｍ² と図５に比較して表面
積が１割以下と小さくマイクロ化ができる。実施例３In FIG. 3, the solid line represents the measurement result of the embodiment of the inductor using the ultrafine wire exciting conductor group and the ultrafine wire amorphous wire group. The exciting conductor is an effective copper wire having a diameter of 10 μm3 covered with an insulating film. The magnetic core has a frequency characteristic of inductance and Q of an inductor knitted into a woven structure by using 100 groups of 100 amorphous wires bundled with a diameter of about 5 μm. By making both the copper wire group and the magnetic core group extremely thin, higher frequency and higher Q can be realized. Also, the element size is 1 × 2 mm ² As compared with FIG. 5, the surface area is as small as 10% or less, and microfabrication is possible. Example 3

【００１０】図１に比較的透磁率の高い極細線アモルフ
ァスワイヤを用いた場合の実施例の概略図を示す。極細
線アモルファスワイヤを束ねリング状の極細線磁心群１
１とし、このリング状の極細線磁心群１１に、各励磁導
体を絶縁膜で被覆し３本束ねた極細線励磁導体群１２を
トロイダル状に捲いたインダクタである。尚、この極細
線磁心群１１に上記励磁導体群１２を二本用い、交互又
は分割して巻くことにより１対１のトランスになる。実施例４FIG. 1 shows a schematic view of an embodiment in which an ultrafine wire amorphous wire having a relatively high magnetic permeability is used. Extra-fine wire A group of ultra-fine wire cores 1
In this inductor, a ring-shaped extra fine wire magnetic core group 11 is wound with a toroidal extra fine wire exciting conductor group 12 in which three exciting conductors are covered with an insulating film and bundled. It is to be noted that a transformer of 1: 1 is obtained by using two of the above-mentioned exciting conductor groups 12 in this ultrafine wire core group 11 and winding them alternately or separately. Example 4

【００１１】図２（ａ）に透磁率の高くない極細線ワイ
ヤ群を用いた場合の実施例概略図を示す。極細線磁心群
２１に、各励磁導体を絶縁膜で被覆した極細線励磁導体
群２２をトロイダル状に捲いたインダクタである。実施
例３の場合と異なり、透磁率が低いため、両端のある単
棒型の磁心を用いても反磁界の効果はあまり現れず、又
極細線磁心を用いているため各ワイヤ磁心の反磁界係数
は小さく、リング状磁心を用いた場合と同じ効果があ
る。図２（ｂ）は上記のようなインダクタを直列に結合
したインダクタ素子の実施例である。FIG. 2 (a) shows a schematic view of an embodiment in which an ultrafine wire group having a low magnetic permeability is used. This is an inductor in which a group of extra-fine wire magnetic cores 21 and a group of extra-fine wire excitation conductors 22 in which each exciting conductor is covered with an insulating film are wound in a toroidal shape. Unlike the case of the third embodiment, since the magnetic permeability is low, the effect of the demagnetizing field does not appear so much even if a single rod type magnetic core with both ends is used, and since the ultrafine wire magnetic core is used, the demagnetizing field of each wire magnetic core is used. The coefficient is small and has the same effect as when the ring-shaped magnetic core is used. FIG. 2B shows an embodiment of an inductor element in which the above inductors are connected in series.

【００１２】上記のように、励磁導体として太い導線
（直径数十μｍ以上）を用いる場合は表皮効果により当
然のことながら１０ＭＨｚ以上でのインダクタンス素子
としての利用は期待できない。一方、直径を表皮効果内
の細い励磁導体を用いても直流抵抗が増加し、Ｑの増加
が期待出来ないが、表皮効果内の導線をよりあわせ励磁
導線として用いることによりＱが高く、高周波化された
インダクタンス素子が可能になる。又、磁心は極細線を
用いることにより、鉄損を低減でき、高周波数化が可能
になる。以上のことから、極細線磁心群と極細線励磁導
体群を用いることは高周波化、マイクロ化をはかるため
に非常に有効である。As described above, when a thick conductive wire (diameter of several tens of μm or more) is used as the exciting conductor, it cannot be expected to be used as an inductance element at 10 MHz or more due to the skin effect. On the other hand, even if a thin excitation conductor with a diameter within the skin effect is used, the DC resistance will increase, and an increase in Q cannot be expected. However, by using the conductor within the skin effect as an exciting conductor wire, the Q is high and the frequency becomes higher. Inducted elements are possible. Further, by using an ultrafine wire for the magnetic core, iron loss can be reduced and higher frequency can be achieved. From the above, it is very effective to use the ultrafine wire magnetic core group and the ultrafine wire excitation conductor group for achieving high frequency and microminiaturization.

【００１３】[0013]

【発明の効果】以上述べたように本発明によれば、極細
線励磁導体群と極細線磁心群を用いることにより、高周
波領域での銅損、鉄損を低減し、インダクタンス素子の
高周波化、高Ｑ化がはかれる利点がある。As described above, according to the present invention, by using the ultrafine wire excitation conductor group and the ultrafine wire magnetic core group, copper loss and iron loss in the high frequency region are reduced, and the inductance element is increased in frequency. There is an advantage that high Q can be achieved.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例を示す概略斜視図である。FIG. 1 is a schematic perspective view showing an embodiment of the present invention.

【図２】本発明の他の実施例を示す概略斜視図である。FIG. 2 is a schematic perspective view showing another embodiment of the present invention.

【図３】本発明の実施例の測定結果を示す特性図であ
る。FIG. 3 is a characteristic diagram showing measurement results of an example of the present invention.

【図４】従来の織物構造インダクタの概略構成図であ
る。FIG. 4 is a schematic configuration diagram of a conventional woven structure inductor.

【図５】従来の織物構造インダクタの測定結果を示す特
性図である。FIG. 5 is a characteristic diagram showing measurement results of a conventional woven structure inductor.

【符号の説明】[Explanation of symbols]

１１，２１…極細線磁心群、１２，２２…極細線励磁導
体群。11, 21 ... Extra-fine wire core group, 12, 22 ... Extra-fine wire excitation conductor group.

Claims

【特許請求の範囲】[Claims]

【請求項１】絶縁膜で被覆した励磁導線を細線磁心に
巻く構成よりなるマイクロワイヤインダクタンス素子に
おいて、細線磁心の直径を１０μｍ以下とし、一本もし
くは多数本を束ねて磁心とすることを特徴とするマイク
ロワイヤインダクタンス素子。1. A micro wire inductance element having a structure in which an exciting wire covered with an insulating film is wound around a thin wire core, wherein the thin wire core has a diameter of 10 μm or less, and one or a plurality of wires are bundled to form a magnetic core. A micro wire inductance element.

【請求項２】多数本を束ねた磁心を緯線とし、励磁導
体の直径を１５μｍ以下とし一本もしくは多数本束ねた
励磁導体群を経線として織物構造を形成することを特徴
とする請求項１記載のマイクロワイヤインダクタンス素
子。2. The woven structure is formed by using a magnetic core in which a large number of bundles are bundled as a latitude line, and making the diameter of the exciting conductors 15 μm or less, and forming a single or a large number of bundled exciting conductor groups as a meridian line. Micro wire inductance element.