JPH0227533Y2 - - Google Patents
Info
- Publication number
- JPH0227533Y2 JPH0227533Y2 JP1984053339U JP5333984U JPH0227533Y2 JP H0227533 Y2 JPH0227533 Y2 JP H0227533Y2 JP 1984053339 U JP1984053339 U JP 1984053339U JP 5333984 U JP5333984 U JP 5333984U JP H0227533 Y2 JPH0227533 Y2 JP H0227533Y2
- Authority
- JP
- Japan
- Prior art keywords
- common mode
- spiral
- coil
- conductive wires
- mode coil
- 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.)
- Expired
Links
- 239000004020 conductor Substances 0.000 claims description 10
- 230000004907 flux Effects 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Description
【考案の詳細な説明】
〔考案の属する技術分野〕
本考案は、ノイズフイルタに使用して好適なコ
モンモードチヨークコイルの構造に関する。[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to the structure of a common mode choke coil suitable for use in a noise filter.
従来のノイズフイルタは、リングコアに２つの
導線を巻回し、各々の導線に電流方向が逆になる
ように電流を流すことにより、リングコア内での
磁束の方向が互いに打消すように構成したコイル
とコンデンサとの組み合わせにより用いられてい
る。すなわち、第１図に示すごとく、フイルタは
コイルL1及びコイルL2によつて構成されたコモ
ンモードコイル１とコンデンサC1，C2とで構成
されている。コイルL1とL2とは互いに逆向きに
電流が流れるように巻線が施される。更に、コン
デンサC1，C2はコイルL1，L2の導線ａ，ｂとｃ，
ｄとの間に直列に配置され、コンデンサC1とC2
との結合点よりアース線Ｅに接続されるように構
成されている。尚、この回路は低周波通過フイル
タを形成している。
Conventional noise filters consist of a coil and a coil configured so that two conductive wires are wound around a ring core and current is passed through each conductor so that the current direction is reversed so that the directions of magnetic flux within the ring core cancel each other out. It is used in combination with a capacitor. That is, as shown in FIG. 1, the filter is composed of a common mode coil 1 composed of a coil L1 and a coil L2 , and capacitors C1 and C2 . Coils L 1 and L 2 are wound so that current flows in opposite directions. Furthermore, capacitors C 1 and C 2 are connected to conductors a, b and c of coils L 1 and L 2 ,
d and placed in series between capacitors C 1 and C 2
It is configured to be connected to the ground wire E from the connection point. Note that this circuit forms a low frequency pass filter.
コモンモードコイル１は一般には透磁率の高い
Mn−Znフエライトコアが用いられている。もつ
とも、使用する周波数により金属系のFe−Ni系
合金や非結晶合金が用いられることがある。フエ
ライトコア５は、第２図に示すごとく、絶縁ケー
ス６に収納され、絶縁ケース６はコイルのための
導線７が互いに接触しないように、中央に絶縁仕
切り８が設けられている。このコイルは電子機器
の電源入力部に設けられ、電子機器に侵入する外
部ノイズ源を阻止する機能を有する。 Common mode coil 1 generally has high magnetic permeability.
A Mn-Zn ferrite core is used. However, depending on the frequency used, a metallic Fe-Ni alloy or an amorphous alloy may be used. As shown in FIG. 2, the ferrite core 5 is housed in an insulating case 6, and the insulating case 6 is provided with an insulating partition 8 in the center so that the conductive wires 7 for the coils do not come into contact with each other. This coil is provided at the power input section of the electronic device, and has the function of blocking external noise sources from entering the electronic device.
しかしながら、このような構造ではコモンモー
ドコイルの厚みを極端に縮小させることが極めて
困難である。したがつて、電子機器及び通信機器
の小型化の要求に応じることが難しいのが現状で
ある。一般に、数Ａ以上の電源ライン用フイルタ
においては、装置自体の小型化により、フイルタ
についても小型化の要求があり、小型で基板に実
装し得るタイプのフイルタの出現が望まれてい
る。 However, with such a structure, it is extremely difficult to extremely reduce the thickness of the common mode coil. Therefore, it is currently difficult to meet the demand for miniaturization of electronic devices and communication devices. In general, in power line filters of several amps or more, as the device itself becomes smaller, there is a demand for smaller filters, and there is a desire for a smaller filter that can be mounted on a board.
本考案はかかる点に鑑み、小型・縮小化に寄与
するコモンモードコイルを提供することを目的と
する。
In view of this point, the present invention aims to provide a common mode coil that contributes to downsizing and downsizing.
〔考案の構成〕
本考案によれば、絶縁基板の両面にそれぞれ第
１及び第２のうず巻状導線を互いに平行な関係で
延在しかつ同心状に形成し、これら２つの導線は
該絶縁基板をうず巻の中心側で貫通する導電部に
より両面の対応し合う導線同士がうず巻の中心側
の端部において接続されており、該第１及び第２
のうず巻の外側の端部を互いに磁束が打消し合う
ように電源ラインに接続するようにしたことを特
徴とするコモンモードコイルが得られる。[Structure of the invention] According to the invention, first and second spiral conductive wires are formed on both sides of an insulating substrate, respectively, extending parallel to each other and concentrically. Corresponding conductive wires on both sides are connected to each other at an end on the center side of the spiral by a conductive portion that penetrates the substrate on the center side of the spiral, and the first and second
A common mode coil is obtained in which the outer ends of the spiral are connected to a power supply line so that their magnetic fluxes cancel each other out.
以下に本考案の一実施例を図面を参照しながら
説明する。
An embodiment of the present invention will be described below with reference to the drawings.
第３図ａ，ｂは本考案の一実施例を平面図、断
面図で示す。 FIGS. 3a and 3b show an embodiment of the present invention in a plan view and a sectional view.
中央に貫通孔７１を有する円形の絶縁板７の表
裏両面に一対のうず巻状導線８ａと８ｂ及び８′
ａと８′ｂとが同じパターンで形成されている。
これら２つの導線は、両面の対応し合う導線８ａ
と８′ａ，８ｂと８′ｂとが、ここではその中心側
の端部において絶縁板７を貫通している導電部９
ａ，９ｂにより接続されている。このようにし
て、例えば導線８ａの外側の端部を第１図の端子
ａに、裏面側の導線８′ａの外側の端部を端子ｂ
にそれぞれ接続し、導線８ｂの外側の端部を第１
図の端子ｃに、裏面側の導線８′ｂの外側の端部
を端子ｄにそれぞれ接続することにより、各導線
に電流が流れる時に生ずる磁束が互いに打消し合
うこととなる。 A pair of spiral conducting wires 8a, 8b and 8' are placed on both the front and back surfaces of a circular insulating plate 7 having a through hole 71 in the center.
A and 8'b are formed in the same pattern.
These two conductors are the corresponding conductors 8a on both sides.
, 8'a, 8b, and 8'b are conductive parts 9 that penetrate through the insulating plate 7 at their central ends.
They are connected by a and 9b. In this way, for example, the outer end of the conductor 8a is connected to the terminal a in FIG. 1, and the outer end of the conductor 8'a on the back side is connected to the terminal b
and connect the outer end of the conductor 8b to the first
By connecting the outer end of the conducting wire 8'b on the back side to the terminal c in the figure and the terminal d, the magnetic fluxes generated when current flows through each conducting wire cancel each other out.
このようなコイルは次のようにしてつくられ
る。 Such a coil is made as follows.
絶縁板７の一面に厚さ35〜50μｍの銅箔を接着
させホトエツチング加工によりうず巻状の導線８
ａ及び８ｂを形成する。同様にして、絶縁板７の
反対の面にうず巻状導線８′ａ及び８′ｂを形成す
る。導電部９ａ及び９ｂは絶縁板７を貫通する孔
に半田を埋めて導線８ａと８′ａ及び８ｂと８′ｂ
とを直列接続して導通状態とする。そして、上記
のように電源ラインに挿入接続して電流を流した
とき発生する磁束を互いに打ち消し合うようにす
ることにより、コモンモードコイルとして作用す
る。 Copper foil with a thickness of 35 to 50 μm is adhered to one side of the insulating plate 7, and a spiral conductive wire 8 is formed by photo-etching.
form a and 8b. Similarly, spiral conductive wires 8'a and 8'b are formed on the opposite side of the insulating plate 7. The conductive parts 9a and 9b are formed by filling the holes penetrating the insulating plate 7 with solder and connecting conductive wires 8a and 8'a and 8b and 8'b.
Connect them in series to make them conductive. Then, as described above, by inserting and connecting to a power supply line and causing the magnetic fluxes generated when a current flows to cancel each other out, it acts as a common mode coil.
なお、このコモンモードコイルは、第４図ａ，
ｂに示すような薄型つぼ型コア１０に収容され
る。ａ，ｂ，ｃ，ｄは第１図の端子ａ，ｂ，ｃ，
ｄに対応した電源ラインとの接続部である。 This common mode coil is shown in Figure 4a,
It is housed in a thin pot-shaped core 10 as shown in FIG. a, b, c, d are terminals a, b, c,
This is the connection part with the power line corresponding to d.
第５図は、本考案の他の例を理解し易いように
拡大した縦断面図である。コモンモードコイルの
間に絶縁層１１を介在させて適当数（ここでは２
層）の積層数とし、複数のコモンモードコイルと
したものである。絶縁層１１は絶縁板７と同じよ
うに銅線皮膜材質であるポリウレタン、ポリエス
テルなどの絶縁材で形成され、絶縁層１１の厚さ
は20〜200μｍとすることができる。よつて、積
層コモンモードコイルと絶縁層１１の積層組合せ
で出来たコモンモードコイルの厚さは、0.5〜1.8
mmという薄型のコイルとなる。 FIG. 5 is an enlarged vertical cross-sectional view of another example of the present invention for easy understanding. The insulating layer 11 is interposed between the common mode coils, and an appropriate number of coils (in this case, 2
The number of layers) is the number of laminated layers, and there are multiple common mode coils. Like the insulating plate 7, the insulating layer 11 is formed of an insulating material such as polyurethane or polyester, which is a copper wire coating material, and the thickness of the insulating layer 11 can be 20 to 200 μm. Therefore, the thickness of the common mode coil made from the laminated combination of the laminated common mode coil and the insulating layer 11 is 0.5 to 1.8.
The coil is as thin as mm.
本実施例では、外経20mm、内径３mmの薄型つぼ
型フエライトコアにおいて、薄型コモンモードコ
イルの積層３〜１のみで（巻線20ターン×２層）
500μH（1KHzで）のインダクタンスが得られるの
で、低電流のノイズフイルタとしてのインダクタ
として使用することができる。 In this example, in a thin pot-shaped ferrite core with an outer diameter of 20 mm and an inner diameter of 3 mm, only 3 to 1 laminated layers of a thin common mode coil are used (20 turns of winding x 2 layers).
Since it has an inductance of 500μH (at 1KHz), it can be used as a low current noise filter inductor.
第６図は本考案の更に他の例を示す斜視図であ
る。本例においては、左右一対のうず巻状導線の
巻き方向を逆向きに左右連続した絶縁層７′に形
成し、更に、第８図に示すごとく、導線形成面と
は反対側の面同士を合わせて絶縁層に貫通孔７１
をあけコモンモードコイルとしたものである。 FIG. 6 is a perspective view showing still another example of the present invention. In this example, a pair of left and right spiral conductive wires are formed in opposite winding directions on the left and right continuous insulating layers 7', and as shown in FIG. Also, a through hole 71 is formed in the insulating layer.
The opening is used as a common mode coil.
以上述べたごとく、本考案によれば互いに磁束
が打消し合うようにうず巻状導線を配置し、絶縁
層を介して一体化したので従来の巻線方法に比べ
１／１０〜1/50以下の寸法にすることができ、小型
化、縮小化を可能にし得るコモンモードコイルを
提供することが可能になつた。
As mentioned above, according to the present invention, the spiral conductor wires are arranged so that their magnetic fluxes cancel each other out, and they are integrated through an insulating layer, so the winding is 1/10 to 1/50 times smaller than the conventional winding method. It has now become possible to provide a common mode coil that can be made smaller and smaller in size.
第１図は従来のコモンモードコイルの回路図、
第２図は同じくコモンモードコイルの一例を示す
図、第３図ａ，ｂは本考案の一実施例を示す平面
図及び断面図、第４図ａ，ｂは本考案によるコモ
ンモードコイルを収容するためのコアの一例を平
面図及び断面図で示し、第５図は本考案の他の実
施例の断面図、第６図、第７図は本考案の更に他
の実施例の斜視図及び断面図。
１……コモンモードコイル、５……フエライト
コア、６……絶縁ケース、７……絶縁板、８ａ，
８′ａ，８ｂ，８′ｂ……うず巻状導線、９ａ，９
ｂ……導電部、１１……絶縁層。
Figure 1 is a circuit diagram of a conventional common mode coil.
Fig. 2 is a diagram showing an example of the common mode coil, Fig. 3 a and b are a plan view and cross-sectional view showing an embodiment of the present invention, and Fig. 4 a and b house the common mode coil according to the present invention. FIG. 5 is a sectional view of another embodiment of the present invention, and FIGS. 6 and 7 are perspective views and sectional views of still another embodiment of the present invention. Cross-sectional view. 1... Common mode coil, 5... Ferrite core, 6... Insulating case, 7... Insulating plate, 8a,
8'a, 8b, 8'b... spiral conductor, 9a, 9
b... Conductive part, 11... Insulating layer.
Claims (1)
巻状導線を互いに平行な関係で延在しかつ同心状
に形成し、これら２つの導線は該絶縁基板をうず
巻の中心側で貫通する導電部により両面の対応し
合う導線同士がうず巻の中心側の端部において接
続されており、該第１及び第２のうず巻の外側の
端部を互いに磁束が打消し合うように電源ライン
に接続するようにしたことを特徴とするコモンモ
ードコイル。 First and second spiral conductive wires are formed on both sides of the insulating substrate, respectively, and extend parallel to each other and concentrically, and these two conductive wires are conductive wires that pass through the insulating substrate at the center side of the spiral. Corresponding conductors on both sides are connected to each other at the center end of the spiral, and the outer ends of the first and second spirals are connected to the power line so that the magnetic fluxes cancel each other out. A common mode coil characterized by being connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5333984U JPS60166137U (en) | 1984-04-13 | 1984-04-13 | common mode coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5333984U JPS60166137U (en) | 1984-04-13 | 1984-04-13 | common mode coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60166137U JPS60166137U (en) | 1985-11-05 |
| JPH0227533Y2 true JPH0227533Y2 (en) | 1990-07-25 |
Family
ID=30574107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5333984U Granted JPS60166137U (en) | 1984-04-13 | 1984-04-13 | common mode coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60166137U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2721227B2 (en) * | 1989-02-16 | 1998-03-04 | 毅 池田 | LC noise filter and PC board using the same |
| GB0321658D0 (en) * | 2003-09-16 | 2003-10-15 | South Bank Univ Entpr Ltd | Bifilar transformer |
| KR102069628B1 (en) * | 2014-01-07 | 2020-01-23 | 삼성전기주식회사 | Coil component and and board for mounting the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5619013B2 (en) * | 1973-09-10 | 1981-05-02 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5619013U (en) * | 1979-07-20 | 1981-02-19 |
-
1984
- 1984-04-13 JP JP5333984U patent/JPS60166137U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5619013B2 (en) * | 1973-09-10 | 1981-05-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60166137U (en) | 1985-11-05 |
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