JPH02235418A - Noise filter - Google Patents
Noise filterInfo
- Publication number
- JPH02235418A JPH02235418A JP5682989A JP5682989A JPH02235418A JP H02235418 A JPH02235418 A JP H02235418A JP 5682989 A JP5682989 A JP 5682989A JP 5682989 A JP5682989 A JP 5682989A JP H02235418 A JPH02235418 A JP H02235418A
- Authority
- JP
- Japan
- Prior art keywords
- common mode
- lead wires
- choke coil
- lead wire
- capacitor
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 20
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003989 dielectric material Substances 0.000 claims abstract description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000001939 inductive effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000252233 Cyprinus carpio Species 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 238000005476 soldering 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、電源線路や信号細路に挿入してノイズの侵入
及び漏洩を防止する主にコモンモード用のノイズフィル
タに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a noise filter mainly for common mode, which is inserted into a power supply line or a signal path to prevent noise from entering or leaking.
従来の技術
従来の一般的なコモンモード用ノイズフィμタの回路図
を第３図に示す。１はフェライトコア、または非晶質金
属等からなるコアに往復電流による磁束が相殺されるよ
うにコアに一対の巻線を施゛シタコモンモードチョーク
コイルである。２．３はラインアース間に接続されたコ
モンモードノイズ低減用コンデンサである。従来のコモ
ンモード用ノイズフィノレタは、これらの部品をプリン
ト基板上、あるいは直接各部品のリード線を接続するこ
とによりフィノレタ回路を形成していた。2. Description of the Related Art A circuit diagram of a conventional common mode noise filter is shown in FIG. Reference numeral 1 denotes a common mode choke coil in which a pair of windings are arranged around a core made of a ferrite core or an amorphous metal so that the magnetic flux due to the reciprocating current is canceled out. 2.3 is a common mode noise reduction capacitor connected between line ground. In conventional common mode noise filters, a filter circuit is formed by connecting these components on a printed circuit board or by directly connecting the lead wires of each component.
発明が解決しようとする課題
上述の従来の構成では、コンデンサ２．３の接続に要す
るリード線、プリント基板銅箔部が長く必要となりコン
デンサと直列にインダクタンス成分が増加し、高周波領
域におけるノイズ防止効果が低減する。Problems to be Solved by the Invention In the above-mentioned conventional configuration, the lead wire and printed circuit board copper foil required for connecting the capacitor 2.3 are long, which increases the inductance component in series with the capacitor, and reduces the noise prevention effect in the high frequency range. is reduced.
さらに、構成部品の配線、組立て工程が複雑で、コスト
面で不利となり、また大形化するものであった。Furthermore, the wiring and assembly process for component parts are complicated, resulting in a cost disadvantage and an increase in size.
本発明は、上記課題の対策として、生産性の良い小形、
低コストで高性能なコモンモード用のノイズフィルタを
提供するものである。As a countermeasure to the above-mentioned problems, the present invention provides a small, highly productive,
The present invention provides a low-cost, high-performance common mode noise filter.
課題を解決するだめの手段
上記課題を解決するために本発明は、コモンモ一ドチョ
ークコイルのリード線に同軸の円筒型電極間に誘電体材
料を介して形成した円筒型コンデンサを挿入し、内周電
極とリード線を接続して構成したものである。Means for Solving the Problems In order to solve the above problems, the present invention inserts a cylindrical capacitor formed through a dielectric material between coaxial cylindrical electrodes in the lead wire of a common mode choke coil. It is constructed by connecting a circumferential electrode and a lead wire.
作用
上述のように、コモンモードチョークコイルのリード線
に円筒型コンデンサを挿入して内周電極とリード線を電
気的に接続し、外周電極をアース電極として使用するの
で、従来の２端子コンデンサで発生したリード線のイン
ダクタンス成分がほとんど発生せず、高周波領域におけ
るノイズ防止効果が改善できる。さらに、コモンモード
チョークコイルのリード線に円筒型コンデンサを挿入、
接続するだけで良いので、リード線の配線、接続、余線
の切断等複雑な工程を要せず、配線、組立ても簡単にな
る。以上の理由によりノイズフィルタの小形化、低コス
ト化、高性能化が可能となる。Function As mentioned above, a cylindrical capacitor is inserted into the lead wire of the common mode choke coil, the inner electrode and the lead wire are electrically connected, and the outer electrode is used as the ground electrode, so a conventional two-terminal capacitor can be used. The generated lead wire inductance component is hardly generated, and the noise prevention effect in the high frequency range can be improved. Furthermore, insert a cylindrical capacitor into the lead wire of the common mode choke coil,
Since it is only necessary to connect, there is no need for complicated processes such as wiring and connecting lead wires, and cutting extra wires, making wiring and assembly easy. For the above reasons, the noise filter can be made smaller, lower in cost, and higher in performance.
実施例
以下、本発明の一実施例について図面を参照して説明す
る。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図．第２図は、本発明の一実施例におけるコモンモ
ード用ノイズフィルタの斜視図と要部の拡大断面図であ
る。フェライトコア、または非品質金属等からなるコア
４に往復電流による磁束が相殺されるように一対の巻線
５．６を施したコモンモードチョークコイ／Ｌ／７の同
一方向の一対のリード線８．９に導電性材料からなる同
軸の円筒型の内周電極１０と外周電４ｉｉ１１間にセラ
ミック等からなる誘電体材料１２を介して形成され内周
電極１０の内径がリード線８．９の外径よりわずかに大
きな円筒型コンデンサ１３を挿入し、円筒型コンデンサ
１３の内周電Ｗｉ１ｏに半田付等によって電気的接続を
行う。外周′ａ１極１１けアース電極としてプリント基
板または、シールドケース等に接続する。これによシ、
コモンモードチョークコイノレ７と円筒型コンデンサ１
３０組み合わせにより第３図に示す回路構成とすること
ができる。Figure 1. FIG. 2 is a perspective view and an enlarged cross-sectional view of essential parts of a common mode noise filter according to an embodiment of the present invention. A pair of lead wires 8 in the same direction of a common mode choke coil/L/7 in which a pair of windings 5.6 are applied to a core 4 made of a ferrite core or a non-quality metal, etc. so that the magnetic flux due to the reciprocating current is canceled out. 9, a coaxial cylindrical inner electrode 10 made of a conductive material and an outer electrode 4ii11 are formed with a dielectric material 12 made of ceramic or the like interposed therebetween, and the inner diameter of the inner electrode 10 is set to the outside of the lead wire 8.9. A cylindrical capacitor 13 slightly larger than the diameter is inserted, and an electrical connection is made to the inner circumferential wire Wi1o of the cylindrical capacitor 13 by soldering or the like. Connect to a printed circuit board, shield case, etc. as a ground electrode with 1 pole and 11 poles on the outer periphery. For this,
Common mode choke coil 7 and cylindrical capacitor 1
The circuit configuration shown in FIG. 3 can be obtained by 30 combinations.
さらに、円筒型コンデンサ１３のセラミック等の誘電体
材料のかわりに誘電体でもあるとともに強磁性体でもあ
るＭｎ系またはＮ１系フェライト材料を使用することに
よりコモンモード用コンデンサとしての役割りだけでな
くフェライトビーズとして、フェライトの高周波損失を
利用して高周波領域における一層のノイズ減衰が可能と
なる。Furthermore, by using an Mn-based or N1-based ferrite material that is both a dielectric and a ferromagnetic material instead of a dielectric material such as ceramic for the cylindrical capacitor 13, it can be used not only as a common mode capacitor but also as a ferrite material. As a bead, it is possible to further attenuate noise in the high frequency range by utilizing the high frequency loss of ferrite.
発明の効果
以上のような本発明は、コモンモードチョークコイルの
リード線に円筒型コンデンサを挿入、接続することによ
りノイズフィルタを構成するため、コンデンサリード線
によるインダクタンス成分を極力小さくでき、高周波領
域におけるノイズ低減効果が良化する。また、配線、組
立ても簡単で小形化できコスト面でも低減が図れる。Effects of the Invention The present invention as described above configures a noise filter by inserting and connecting a cylindrical capacitor to the lead wire of a common mode choke coil, so the inductance component due to the capacitor lead wire can be minimized, and the inductance component in the high frequency region can be reduced. Improves noise reduction effect. In addition, wiring and assembly are simple and compact, and costs can be reduced.
以上のような利点を有し、工業的価値の大なるものであ
る。It has the advantages mentioned above and is of great industrial value.
第１図は本発明の一実施例におけるコモンモード用ノイ
ズフィルタの斜視図、第２図は実施例Ｋおけるコモンモ
ード用ノイズフィルタの要部の断面図、第３図はコモン
モード用ノイズフィルタの電気回路図である。
４・・・・・・コア、６．６・・・●・・巻線、７・・
・・・・コモンモードチョークコイ／Ｌ’、８．９・・
・・・・リード線、１ｏ・・・・・・内周電極、１１・
・・・・・外周電極、１２・・・・・・誘電体材料、１
３・・・・・・円筒コンデンサ。FIG. 1 is a perspective view of a common mode noise filter according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part of a common mode noise filter according to embodiment K, and FIG. It is an electrical circuit diagram. 4...Core, 6.6...●...Winding, 7...
...Common mode choke carp/L', 8.9...
...Lead wire, 1o...Inner circumferential electrode, 11.
......Outer electrode, 12...Dielectric material, 1
3...Cylindrical capacitor.
Claims (2)
軸の円筒型電極間に誘電体材料を介して形成した円筒型
コンデンサを挿入し、内周電極とリード線を接続して構
成したノイズフィルタ。(1) A noise filter constructed by inserting a cylindrical capacitor formed with a dielectric material between coaxial cylindrical electrodes in the lead wire of a common mode choke coil, and connecting the inner electrode and the lead wire.
求項１記載のノイズフィルタ。(2) The noise filter according to claim 1, wherein a ferrite material is used as the dielectric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5682989A JPH02235418A (en) | 1989-03-08 | 1989-03-08 | Noise filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5682989A JPH02235418A (en) | 1989-03-08 | 1989-03-08 | Noise filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02235418A true JPH02235418A (en) | 1990-09-18 |
Family
ID=13038267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5682989A Pending JPH02235418A (en) | 1989-03-08 | 1989-03-08 | Noise filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02235418A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016207941A (en) * | 2015-04-27 | 2016-12-08 | 株式会社村田製作所 | Coil component |
| WO2017169621A1 (en) * | 2016-04-01 | 2017-10-05 | 株式会社村田製作所 | Common mode choke coil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5920620B2 (en) * | 1981-12-14 | 1984-05-14 | 株式会社フジクラ | How to strengthen glass fiber for optical communication |
| JPS5984414A (en) * | 1982-11-04 | 1984-05-16 | 株式会社村田製作所 | Lc filter |
-
1989
- 1989-03-08 JP JP5682989A patent/JPH02235418A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5920620B2 (en) * | 1981-12-14 | 1984-05-14 | 株式会社フジクラ | How to strengthen glass fiber for optical communication |
| JPS5984414A (en) * | 1982-11-04 | 1984-05-16 | 株式会社村田製作所 | Lc filter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016207941A (en) * | 2015-04-27 | 2016-12-08 | 株式会社村田製作所 | Coil component |
| US10102963B2 (en) | 2015-04-27 | 2018-10-16 | Murata Manufacturing Co., Ltd. | Coil component |
| WO2017169621A1 (en) * | 2016-04-01 | 2017-10-05 | 株式会社村田製作所 | Common mode choke coil |
| CN108885933A (en) * | 2016-04-01 | 2018-11-23 | 株式会社村田制作所 | Common mode choke |
| JPWO2017169621A1 (en) * | 2016-04-01 | 2018-12-06 | 株式会社村田製作所 | Common mode choke coil |
| US11508515B2 (en) | 2016-04-01 | 2022-11-22 | Murata Manufacturing Co., Ltd. | Common mode choke coil |
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