JP2738763B2 - Common mode choke coil for broadband multi-wire transmission line - Google Patents

Common mode choke coil for broadband multi-wire transmission line

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Publication number
JP2738763B2
JP2738763B2 JP3745590A JP3745590A JP2738763B2 JP 2738763 B2 JP2738763 B2 JP 2738763B2 JP 3745590 A JP3745590 A JP 3745590A JP 3745590 A JP3745590 A JP 3745590A JP 2738763 B2 JP2738763 B2 JP 2738763B2
Authority
JP
Japan
Prior art keywords
common mode
transmission line
long
core
choke 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 - Fee Related
Application number
JP3745590A
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Japanese (ja)
Other versions
JPH03241718A (en
Inventor
大 松島
国主男 高木
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Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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Priority to JP3745590A priority Critical patent/JP2738763B2/en
Publication of JPH03241718A publication Critical patent/JPH03241718A/en
Application granted granted Critical
Publication of JP2738763B2 publication Critical patent/JP2738763B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、多数の心線からなる平衡伝送路を伝導す
るコモンモードノイズ電流を、広帯域にわたって阻止す
るチョークコイルに関するものである。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a choke coil for blocking a common mode noise current transmitted through a balanced transmission line composed of a large number of core wires over a wide band.

〔従来の技術〕[Conventional technology]

多対平衡ケーブルやフラットケーブルなど、多数の心
線を有する平衡伝送路の各心線を同方向に伝導するコモ
ンモードノイズ電流を阻止するために用いられるチョー
クコイルとしては、従来、第9図〜第11図に示す構成の
ものが広く用いられている。すなわち、第9図(a)
で、1は円形状のトロイダルコア、2はn本の心線から
なる伝送線路(以下、各心線も伝送線路2という)であ
り、トロイダルコア1に同方向に捲回されている。,
,…および′,′,…′は伝送線路2の各々
の入力端子および出力端子である。このようなチョーク
コイルのコモンモード雑音電流に対する阻止性能は、ト
ロイダルコア1のコイルのインダクタンスLによって決
まり、Lは前記伝送線路2のトロイダルコア1への巻数
Nの2乗に比例することから、一般にはできるだけNを
大きくしたものが用いられる。
Conventionally, as a choke coil used to block a common mode noise current that conducts in the same direction through each core of a balanced transmission line having a large number of cores, such as a multi-pair balanced cable or a flat cable, FIGS. The configuration shown in FIG. 11 is widely used. That is, FIG. 9 (a)
Reference numeral 1 denotes a circular toroidal core, and 2 denotes a transmission line composed of n cores (hereinafter, each core is also referred to as a transmission line 2), which is wound around the toroidal core 1 in the same direction. ,
,... And ',',..., Are input and output terminals of the transmission line 2, respectively. The blocking performance of such a choke coil against common mode noise current is determined by the inductance L of the coil of the toroidal core 1, and L is generally proportional to the square of the number N of turns of the transmission line 2 around the toroidal core 1. Is used in which N is made as large as possible.

一方、第9図(b)はトロイダルコア1に伝送線路2
を多回数捲回した場合の断面の概略であり、円形状のコ
ア内径断面部分を多数の巻線が密集して貫通するため、
巻線の入出力端子間および巻線相互間に浮遊容量C0が発
生する。
On the other hand, FIG. 9 (b) shows that the transmission line 2 is connected to the toroidal core 1.
Is an outline of the cross section when wound many times, because a large number of windings densely penetrate the circular core inner diameter cross section,
Stray capacitance C 0 between the input and output terminals and between windings mutually windings occurs.

すなわち、第10図は、第9図のコモンモードチョーク
コイルの電気的等価回路であり、第10図(a)の
C11′,C22′,……,Cnn′はそれぞれ入出力端子−
′間,−′間,……,−′間の巻線浮遊容
量、第10図(b)のC12,C13,……,C1nはそれぞれ入
力端子−間,−間,……,−間の巻線浮遊
容量である。なお、これ以外にも入出力端子相互間に同
様の浮遊容量が存在することは明らかであるが省略して
ある。
That is, FIG. 10 is an electrical equivalent circuit of the common mode choke coil of FIG. 9, and FIG.
C 11 ′, C 22 ′,..., C nn ′ are input / output terminals, respectively.
'During, -' between, ......, - 'winding stray capacitance between, C 12, C 13 of FIG. 10 (b), ..., respectively C 1n the input terminal - between, - while, ..., This is the winding stray capacitance between-. In addition, it is obvious that similar stray capacitances exist between the input and output terminals, but they are omitted.

第10図(a)で入力端子,,……,から各線路
を同相で伝導する高周波のコモンモードノイズ電流Ic
流入した場合、それぞれの入出力端子間に上記巻線浮遊
容量C11′,C22′,……,Cnn′があるため、コモンモ
ードノイズ電流Icの高周波成分は、巻線コイル部分を通
らずこれらの容量部分を通過してしまう。したがって、
第9図のような構造のコモンモードチョークコイルで
は、インダクタンスLが大きくても高周波のコモンモー
ドノイズ電流に対する阻止特性が低下する欠点がある。
Figure 10 (a) in the case where the input terminal ,, ..., the common mode noise current I c of the high-frequency conducting each line in phase from flowing, each of the windings floating between the input and output terminal capacitance C 11 ' , C 22 ', ......, C nn' because of the high frequency component of the common mode noise current I c is get through these capacitance portion without passing through the winding coil portion. Therefore,
The common mode choke coil having the structure as shown in FIG. 9 has a drawback that even if the inductance L is large, the blocking characteristic against high frequency common mode noise current is reduced.

一方、第10図(b)で任意の伝送線路、例えば入出力
端子−′と−′とをペア線として使用したとき
の往復の信号電流In(ノーマルモード電流)が第10図
(c)の波形Aのようなパルスの場合、このペア線間に
は上記巻線浮遊容量C12や信号電流Inによるトロイダル
コア1の実効抵抗が存在するため、第10図(c)の波形
Bのように波形がなまり、伝送路に接続された図示しな
い回路が動作不能となるなどの可能性がある。すなわ
ち、第9図(a)のような従来のコモンモードチョーク
コイルは、高速度パルス伝送線路へ適用できない欠点が
ある。
On the other hand, FIG. 10 (b) in any transmission line, for example, input and output terminals - 'and -' reciprocal of the signal current I n (normal mode current) when the using as a pair lines FIG. 10 (c) for pulse like waveform a, this is between wire pairs of the toroidal core 1 by the coil stray capacitance C 12 and the signal current I n for effective resistance is present, the waveform B of FIG. 10 (c) As a result, the waveform may be distorted, and a circuit (not shown) connected to the transmission line may become inoperable. That is, the conventional common mode choke coil as shown in FIG. 9A has a disadvantage that it cannot be applied to a high-speed pulse transmission line.

次に、第11図は多線条伝送線路へ使用されているコモ
ンモードチョークコイルの他の従来例であり、第11図
(a)はフラットケーブルなどの平面状に配置された伝
送線路2を平板状ループコア3で囲ったもの、第11図
(b)は多対平衡ケーブルなど円形断面を有する伝送線
路2を円筒状コア4で囲ったものである。なお、,
,……,,′,′,…′は第9図と同じく
入,出力端子を示す。
Next, FIG. 11 shows another conventional example of a common mode choke coil used for a multi-wire transmission line, and FIG. 11 (a) shows a transmission line 2 arranged in a plane such as a flat cable. FIG. 11B shows a transmission line 2 having a circular cross section, such as a multi-pair balanced cable, surrounded by a cylindrical core 4. In addition,
,..., ',',..., Indicate input and output terminals as in FIG.

このような構造では、入出力端子間および各伝送線路
間の浮遊容量は第9図に比べ極めて小さい。しかし、例
えば第11図(a)では各伝送線路2が平板状ループコア
3を1回貫通しているのみであり、等価巻数は1ターン
であることから各伝送線路2のコモンモードノイズ電流
Icに基づくコア内磁束φ,φ,……φの集積によ
って生じるインダクタンスLが低周波領域(低域)では
小さい。したがって、コモンモードノイズ電流Icを阻止
するに必要な低域でのインダクタンスLを得るために
は、コア断面積が大きいか、伝送方向のコア長さlが大
きいものが必要となるなどの欠点がある。第11図(b)
の構造についても第11図(a)と同様である。
In such a structure, the stray capacitance between the input / output terminals and between the transmission lines is much smaller than that in FIG. However, for example, in FIG. 11A, each transmission line 2 only penetrates the flat loop core 3 once, and the equivalent number of turns is one turn.
Core flux phi 1 based on I c, φ 2, the inductance L caused by accumulation of ...... φ n is small in the low frequency region (low band). Accordingly, drawbacks such in order to obtain the inductance L of the low range necessary to prevent the common mode noise current I c is either core area is large, it is necessary that a large core length l of a transmission direction There is. Fig. 11 (b)
Is similar to that of FIG. 11 (a).

〔発明が解決しようとする課題〕[Problems to be solved by the invention]

このように、従来の円形状のトロイダルコア1を用い
た従来の多線条チョークコイルでは、入出力端子間の巻
線浮遊容量により高周波領域におけるコモンモードノイ
ズ電流の阻止特性が低下するとともに、パルス伝送時に
は巻線相互間浮遊容量によってパルス信号がなまり、高
速度パルス伝送が行えない欠点があった。また、多線条
伝送線路を従来の平板状ループコア3や円筒状コア4で
囲ったものでは、低域におけるコモンモードノイズ電流
の阻止特性が十分でなく、これを得るにはコア断面積が
大きいか、長さが長大なものが必要となるなどの欠点が
あった。
As described above, in the conventional multi-wire choke coil using the conventional circular toroidal core 1, the blocking characteristic of the common mode noise current in the high frequency region is reduced due to the stray winding capacitance between the input and output terminals, and the pulse is reduced. At the time of transmission, the pulse signal is dull due to the stray capacitance between the windings, and there is a disadvantage that high-speed pulse transmission cannot be performed. Further, in the case where the multi-wire transmission line is surrounded by the conventional flat loop core 3 or cylindrical core 4, the blocking characteristic of the common mode noise current in the low band is not sufficient, and the core cross-sectional area is large to obtain this. However, there is a drawback that a long one is required.

この発明は、上記欠点を解消し、多対ケーブルやフラ
ットケーブルなど多数の心線からなる平衡伝送路を伝導
するコモンモードノイズ電流の阻止特性が広帯域にわた
ってすぐれ、高速度パルス伝送方式にも適用可能な広帯
域多線条伝送路用コモンモードチョークコイルを提供す
ることを目的とする。
The present invention solves the above-mentioned drawbacks, has excellent blocking characteristics of common mode noise current transmitted through a balanced transmission line composed of many core wires such as a multi-pair cable and a flat cable over a wide band, and is applicable to a high-speed pulse transmission system. It is an object of the present invention to provide a common mode choke coil for a wide band multi-wire transmission line.

〔課題を解決するための手段〕[Means for solving the problem]

この発明にかかる広帯域多線条伝送路用コモンモード
チョークコイルは、多線条平衡伝送路を伝導するコモン
モード電流を抑制するチョークコイルにおいて、複数個
の長辺磁路が平衡に配置された閉磁路コアの長辺磁路を
前記多線条平衡伝送路の伝送方向に垂直に設け、この閉
磁路コアの前記複数個の長辺磁路のいずれかに、前記多
線条平衡伝送路の各伝送線路を同一長辺磁路上では交叉
させずに互いに同方向,同回数捲回し、異なる隣接長辺
磁路同士の該巻線の巻方向が互いに逆向きとなるように
捲回したものである。
A common mode choke coil for a wide band multi-wire transmission line according to the present invention is a choke coil for suppressing a common mode current transmitted through a multi-wire balanced transmission line, wherein a closed magnetic field in which a plurality of long-side magnetic paths are arranged in a balanced manner. A long-side magnetic path of the path core is provided perpendicular to the transmission direction of the multi-wire balanced transmission path, and any one of the plurality of long-side magnetic paths of the closed magnetic path core is provided with each of the multi-wire balanced transmission paths. The transmission lines are wound in the same direction and the same number of times without crossing over the same long-side magnetic path, and are wound so that the winding directions of the windings of different adjacent long-side magnetic paths are opposite to each other. .

〔作用〕[Action]

この発明においては、コモンモード電流により発生す
る磁束は加わるためインダクタンスが増大し阻止され、
往復のノーマルモードの信号電流により発生する磁束は
打ち消してインダクタンスを呈さなくなり、ノーマルモ
ードの信号電流は減衰することなく通過する。
In the present invention, since the magnetic flux generated by the common mode current is added, the inductance is increased and blocked,
The magnetic flux generated by the reciprocating normal mode signal current cancels out and no longer exhibits inductance, and the normal mode signal current passes without attenuation.

〔実施例〕〔Example〕

第1図はこの発明の一実施例の基本構成図である。な
お、以下では説明の都合上、各伝送線路2の入力端子,
出力端子はいずれも同じ番号を用い、また、ペア線を示
すには′のようにして表すものとする。
FIG. 1 is a basic configuration diagram of an embodiment of the present invention. In the following, for convenience of explanation, the input terminal of each transmission line 2,
The same numbers are used for the output terminals, and the paired lines are represented as'.

この図において、11は長方形状の閉磁路コアで、長辺
磁路11A,11Bを伝送線路2のペア線′,……,
′,′の伝送方向に垂直に配置してある。
In this figure, reference numeral 11 denotes a rectangular closed magnetic path core, and long side magnetic paths 11A and 11B are connected to a pair of transmission line 2 ',.
',' Are arranged perpendicular to the transmission direction.

第1図(a)で、12−i,12−i′はn対の伝送線路2
の中の任意のi番目のペア線′を閉磁路コア11の所
定の間隔をおいて対向した2つの長辺磁路11A,11Bの一
方に、ともにN回だけ互いに交叉させないで長辺磁路11
Aに対して同方向に捲回したコイルである。
In FIG. 1 (a), 12-i and 12-i 'are n pairs of transmission lines 2.
Of the two long-side magnetic paths 11A and 11B opposed to each other at a predetermined interval of the closed magnetic path core 11 without crossing each other N times each other. 11
A coil wound in the same direction as A.

第1図(b)で、コイル12−i,12−i′はn対の伝送
線路2の中の任意のi番目のペア線′を閉磁路コア
11の所定の間隔をおいて対向した2つの長辺磁路11A,11
Bのうち、一方および他方に捲回したコイルである。た
だし、第1図(b)ではコイル12−iと12−i′とは各
長辺磁路11A,11Bに対して捲回方向が逆である。これら
i番目以外の図示しない伝送線路対についてもペア線を
同一長辺磁路に捲回するか、またはペア線を2つの長辺
磁路にふり分けて、かつ同一長辺磁路上では捲回方向は
同方向となるように捲回する。
In FIG. 1 (b), coils 12-i and 12-i 'are used to connect any i-th paired line' of n pairs of transmission lines 2 to a closed magnetic circuit core.
11, two long-side magnetic paths 11A and 11 facing each other at a predetermined interval
B is a coil wound around one and the other. However, in FIG. 1B, the winding directions of the coils 12-i and 12-i 'are opposite to the long side magnetic paths 11A and 11B. For the transmission line pairs (not shown) other than the i-th pair, the pair wire is wound around the same long-side magnetic path, or the pair wire is divided into two long-side magnetic paths and wound on the same long-side magnetic path. Winding is performed in the same direction.

第2図は第1図の構成によるこの発明の実施例の動作
原理を説明する図であり、第2図(a),(b)は第1
図(a)に、第2図(c),(d)は第1図(b)に対
応し、第2図(a),(c)はコモンモードノイズ電流
Icの流入、第2図(b),(d)はノーマルモード信号
電流INの流入の各場合に対して、コイル12−i,12−i′
により閉磁路コア11内に発生する磁束の方向を示してい
る。
FIG. 2 is a diagram for explaining the operation principle of the embodiment of the present invention having the configuration of FIG. 1, and FIGS. 2 (a) and 2 (b) show the first embodiment.
2 (c) and 2 (d) correspond to FIG. 1 (b), and FIGS. 2 (a) and 2 (c) show common mode noise current.
Inflow of I c, FIG. 2 (b), (d) for each case of the inflow of the normal mode signal current I N, the coil 12-i, 12-i '
Indicates the direction of the magnetic flux generated in the closed magnetic circuit core 11.

すなわち、第2図(a),(c)でコモンモードノイ
ズ電流Icがコイル12−iおよび12−i′を流れることに
よって、これらのコイル12−i,12−i′が捲回された長
辺磁路11A,11B内部に発生するそれぞれの磁束φci,φ
ci′はいずれも閉磁路コア11内で同一方向となるため強
め合う。実際には図示しないこれら以外のコイルを流れ
るコモンモードノイズ電流Icによる磁束も加わるため、
チョークコイルはコモンモードノイズ電流Icに対して大
きなインダクタンスLとして作用する。また、2つの長
辺磁路11A,11Bが間隔をおいて対向しているため、入出
力端子間の巻線浮遊容量が小さく、コモンモードノイズ
電流Icが高周波電流の場合にもインダクタンスLが有効
に作用する。
That is, FIG. 2 (a), the common-mode 'by flowing, these coils 12-i, 12-i' noise current I c is the coil 12-i and 12-i are wound in (c) The magnetic fluxes φ ci and φ generated inside the long-side magnetic paths 11A and 11B, respectively.
All of the ci's are in the same direction in the closed magnetic circuit core 11 and thus reinforce each other. Because actually be applied flux by the common mode noise current I c flowing through these other coils, not shown,
Choke coil acts as a large inductance L with respect to the common mode noise current I c. Further, two long sides magnetic path 11A, since 11B are opposed at intervals, small winding stray capacitance between the input and output terminals, the common mode noise current I c is the inductance L in the case of the high-frequency current Works effectively.

また、第2図(b),(d)でノーマルモード信号電
流INがコイル12−iおよび12−i′に流れた場合、これ
らのコイル12−1,12−i′が捲回された長辺磁路11A,11
B内部に発生するそれぞれの磁束φNi,φNi′は、コイ
ルの捲回が同じであることから、大きさは同じで向きは
反対となるため打ち消しあう。同じように、実際には図
示しないこれ以外のコイルに流れるノーマルモード信号
電流INが流れた場合でも、それぞれ対となるコイルによ
って発生する磁束は大きさな同じで方向が逆となる。よ
って、この閉磁路コア11内に発生する磁束は、ペア線ど
うしでできるコイルによって発生する磁束が互いに打ち
消しあうことによってなくなり、結果としてこれらのコ
イルはノーマルモード信号電流INに対してインダクタン
スLとならないため、ノーマルモード信号電流INに対す
る損失は生じない。とくに、第1図(a)では伝送線路
2のペア線′どうしを同一長辺磁路11Aに捲回して
あるため、第2図(b)より明らかにノーマルモード信
号電流INによる発生磁束流φNi,φNi′は同一長辺磁路
11A上で打ち消しされるため、ノーマルモード信号電流I
Nに対するコアの実効抵抗にもとずく損失をより小さく
することができる。
The second view (b), the normal mode signal current I N is 'when flowing, these coils 12-1,12-i' coil 12-i and 12-i are wound in (d) Long side magnetic path 11A, 11
Since the magnetic fluxes φ Ni and φ Ni ′ generated inside B are the same and the directions are opposite because the winding of the coil is the same, they cancel each other out. Similarly, even if the actual normal mode signal flowing through the other coil (not shown) current I N flows, magnetic flux generated by the coil to be paired respectively is reverse is the same size direction. Therefore, the magnetic flux generated in the closed magnetic circuit core 11 is eliminated by the magnetic flux generated by the coil which can pair line each other cancel each other, the coils the resulting inductance L with respect to the normal-mode signal current I N and since they are not, the loss for the normal mode signal current I N is not generated. In particular, since the to what FIG. 1 (a) the pair of wires of the transmission line 2 'are wound on the same long side magnetic path 11A, FIG. 2 (b) from apparently normal mode signal current I N by generating magnetic flux flow φ Ni and φ Ni ′ have the same long-side magnetic path
Normal mode signal current I
The loss can be further reduced based on the effective resistance of the core to N.

第3図は、第1図の構成によるこの発明の実施例のコ
モンモードチョークコイルにおいて、ノイズ抑止特性の
周波数領域を低域および高域へ拡大する方向を説明する
図である。すなわち、第3図で長辺磁路11Aの一部を捲
回するコイル12−iの捲回部分wを大きくして、この部
分に多回数捲回することによりコイル12−iの低域での
インダクタンスが増加するとともに、捲回部分wが大き
いため入出力間の浮遊容量Cの増加が少ないために、ノ
イズ抑止効果をそれぞれ低域へも高域へも拡大できる。
FIG. 3 is a diagram for explaining a direction in which the frequency region of the noise suppression characteristic is expanded to a low band and a high band in the common mode choke coil according to the embodiment of the present invention having the configuration of FIG. That is, in FIG. 3, the winding portion w of the coil 12-i that winds a part of the long-side magnetic path 11A is increased, and the coil 12-i is wound many times in this portion, so that the low frequency of the coil 12-i is obtained. And the stray capacitance C between the input and the output is small because the winding portion w is large, so that the noise suppression effect can be extended to both low and high frequencies.

第4図は、第1図の実施例の閉磁路コア11の長辺磁路
を11A,11B,11Cの3磁路にした場合の実施図である。
FIG. 4 is an embodiment in which the long side magnetic path of the closed magnetic path core 11 of the embodiment of FIG. 1 is made up of three magnetic paths of 11A, 11B and 11C.

第5図は、第1図の実施例におけるコモンモードチョ
ークコイルを、RS−232C,GP−IB,セントロニクス仕様ケ
ーブルなど多数の接続端子を有するインタフェースケー
ブル用コネクタ中に適用した実施例であり、13はハウジ
ング、14は接続端子、15は角対ケーブルである。すなわ
ち、第5図で長方形状の閉磁路コア11の長辺磁路11A
が、2列構成となっている多端子コネクタの各端子列と
対向して配置してあるため、各端子からの引出し線をそ
のまま交叉させずに対向磁路部分に捲回することによ
り、多線条線路の場合でも巻線間の分布容量が増加しな
い。
FIG. 5 shows an embodiment in which the common mode choke coil in the embodiment of FIG. 1 is applied to an interface cable connector having a large number of connection terminals such as RS-232C, GP-IB, and Centronics specification cables. Is a housing, 14 is a connection terminal, and 15 is a square pair cable. That is, the long side magnetic path 11A of the rectangular closed magnetic path core 11 in FIG.
However, since it is arranged to face each terminal row of the multi-terminal connector having a two-row configuration, the lead wires from each terminal are wound around the opposing magnetic path without being crossed as they are. Even in the case of a linear track, the distributed capacitance between the windings does not increase.

第6図は、第1図の実施例におけるコモンモードチョ
ークコイルをフラットな多対線の接続端子14を有するコ
ネクタに適用した実施例であり、16はハウジングであ
る。すなわち、第6図のコモンモードチョークコイルに
おいて、n本の伝送線路の内ペア線どうしを2つの長辺
磁路にふり分けて捲回し、コイル入出力間の距離wを大
きくとることによりノイズ抑止特性の広帯域化できる。
FIG. 6 shows an embodiment in which the common mode choke coil in the embodiment of FIG. 1 is applied to a connector having flat multi-paired connection terminals 14, and 16 is a housing. That is, in the common mode choke coil of FIG. 6, the inner pair wires of the n transmission lines are separated and wound into two long-side magnetic paths, and the distance w between the coil input and output is increased to suppress noise. The characteristics can be broadened.

第7図は、第1図の実施例におけるコモンモードチョ
ークコイルをICチップ内に取込んだ実施例であり、17は
ハウジング、18は信号伝送路端子である。
FIG. 7 shows an embodiment in which the common mode choke coil of the embodiment shown in FIG. 1 is incorporated in an IC chip. Reference numeral 17 denotes a housing, and reference numeral 18 denotes a signal transmission line terminal.

第8図は、第1図の実施例におけるコモンモードチョ
ークコイルをモジュラプラグに設けた場合の実施例であ
り、19はハウジングである。
FIG. 8 shows an embodiment in which the common mode choke coil in the embodiment of FIG. 1 is provided on a modular plug, and 19 is a housing.

〔発明の効果〕〔The invention's effect〕

以上説明したようにこの発明は、複数個の長辺磁路が
平行に配置された閉磁路コアの長辺磁路を多線条平衡伝
送路の伝送方向に垂直に設け、この閉磁路コアの前記複
数個の長辺磁路のいずれかに、それぞれ多線条平衡伝送
路の各伝送線路を同一長辺磁路上では交叉させず互いに
同方向,同回数捲回し、異なる隣接長辺磁路同士の該巻
線の巻方向が互いに逆向きとなるように捲回したことに
より、コモンモードノイズ電流の抑止特性の広帯域化が
できる利点がある。
As described above, the present invention provides a long magnetic path of a closed magnetic path core in which a plurality of long magnetic paths are arranged in parallel to the transmission direction of a multi-wire balanced transmission path, Each of the transmission lines of the multi-line balanced transmission line is wound in the same direction and the same number of times on any one of the plurality of long side magnetic paths without crossing each other on the same long side magnetic path. By winding the windings so that the winding directions of the windings are opposite to each other, there is an advantage that the common-mode noise current suppression characteristic can be broadened.

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

第1図(a),(b)はこの発明のコモンモードチョー
クコイルの基本構成を示す斜視図、第2図(a)〜
(d)は、第1図のコモンモードチョークコイルの動作
原理を説明する図、第3図は、第1図のコモンモードチ
ョークコイルのノイズ阻止効果の広帯域特性を説明する
図、第4図は、第1図の閉磁路コアの長辺磁路を3本に
した場合の実施例を示す斜視図、第5図,第6図,第7
図および第8図は、第1図のコモンモードチョークコイ
ルの適用例をそれぞれ示す斜視図、第9図(a),
(b)は従来の平衡多線伝送線路のコモンモードノイズ
電流を阻止する円形状のトロイダルコアを用いたチョー
クコイルの構成を示す斜視図ならびに断面図、第10図
(a)〜(c)は、第9図の電気的等価回路図と要部の
波形図、第11図(a),(b)は従来の平衡多線伝送線
路のコモンモードノイズ電流を阻止する第9図と異なる
平板状ループおよび円筒状コアを用いた構成を示す斜視
図である。 図中、2は伝送線路、11は閉磁路コア、11うA,11Bは長
辺磁路、12はコイル、13,16,17,19はハウジング、14は
接続端子、15は多対ケーブル、18は信号伝送路端子であ
る。
1 (a) and 1 (b) are perspective views showing a basic configuration of a common mode choke coil according to the present invention, and FIGS.
(D) is a diagram for explaining the operation principle of the common mode choke coil of FIG. 1, FIG. 3 is a diagram for explaining the broadband characteristic of the noise suppression effect of the common mode choke coil of FIG. 1, and FIG. FIG. 1, FIG. 5, FIG. 6, and FIG. 7 show perspective views showing an embodiment in which three long-side magnetic paths are used in the closed magnetic path core shown in FIG.
FIG. 8 and FIG. 8 are perspective views each showing an application example of the common mode choke coil of FIG. 1, and FIGS.
(B) is a perspective view and a cross-sectional view showing a configuration of a choke coil using a circular toroidal core for blocking a common mode noise current of a conventional balanced multi-wire transmission line, and FIGS. , FIG. 9 is an electrical equivalent circuit diagram and waveform diagrams of essential parts, and FIGS. 11 (a) and 11 (b) are plate-like figures different from FIG. 9 for blocking common mode noise current of a conventional balanced multi-wire transmission line. It is a perspective view showing composition using a loop and a cylindrical core. In the figure, 2 is a transmission line, 11 is a closed magnetic circuit core, 11 A and 11B are long side magnetic paths, 12 is a coil, 13, 16, 17, and 19 are a housing, 14 is a connection terminal, 15 is a multi-pair cable, Reference numeral 18 denotes a signal transmission path terminal.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】多線条平衡伝送路を伝導するコモンモード
電流を抑制するチョークコイルにおいて、複数個の長辺
磁路が平行に配置された閉磁路コアの長辺磁路を前記多
線条平衡伝送路の伝送方向に垂直に設け、この閉磁路コ
アの前記複数個の長辺磁路のいずれかに、前記多線条平
衡伝送路の各伝送線路を同一長辺磁路上では交叉させず
に互いに同方向、同回数捲回し、異なる隣接長辺磁路同
士の該巻線の巻方向が互いに逆向きとなるように捲回し
たことを特徴とする広帯域多線条伝送路用コモンモード
チョークコイル。
1. A choke coil for suppressing a common mode current transmitted through a multi-wire balanced transmission path, wherein a long-side magnetic path of a closed magnetic path core in which a plurality of long-side magnetic paths are arranged in parallel is connected to the multi-wire path. It is provided perpendicular to the transmission direction of the balanced transmission line, and the transmission lines of the multi-wire balanced transmission line are not crossed on any one of the plurality of long side magnetic paths of the closed magnetic path core on the same long side magnetic path. Characterized in that they are wound in the same direction and the same number of times, and are wound such that the winding directions of the windings of different adjacent long-side magnetic paths are opposite to each other. coil.
JP3745590A 1990-02-20 1990-02-20 Common mode choke coil for broadband multi-wire transmission line Expired - Fee Related JP2738763B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3745590A JP2738763B2 (en) 1990-02-20 1990-02-20 Common mode choke coil for broadband multi-wire transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3745590A JP2738763B2 (en) 1990-02-20 1990-02-20 Common mode choke coil for broadband multi-wire transmission line

Publications (2)

Publication Number Publication Date
JPH03241718A JPH03241718A (en) 1991-10-28
JP2738763B2 true JP2738763B2 (en) 1998-04-08

Family

ID=12497992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3745590A Expired - Fee Related JP2738763B2 (en) 1990-02-20 1990-02-20 Common mode choke coil for broadband multi-wire transmission line

Country Status (1)

Country Link
JP (1) JP2738763B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69417950T2 (en) * 1993-05-26 1999-09-23 Nippon Telegraph & Telephone Filters to achieve electromagnetic compatibility for a symmetrical multi-core telecommunication line
JP5387502B2 (en) * 2010-05-21 2014-01-15 Tdk株式会社 Coil parts and impedance adjustment method

Also Published As

Publication number Publication date
JPH03241718A (en) 1991-10-28

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