JP3396908B2 - Line filter - Google Patents
Line filterInfo
- Publication number
- JP3396908B2 JP3396908B2 JP08298193A JP8298193A JP3396908B2 JP 3396908 B2 JP3396908 B2 JP 3396908B2 JP 08298193 A JP08298193 A JP 08298193A JP 8298193 A JP8298193 A JP 8298193A JP 3396908 B2 JP3396908 B2 JP 3396908B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- magnetic
- line filter
- winding portion
- leg
- 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
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は各種電子機器にノイズ防
止用として使用するラインフィルタに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line filter used in various electronic devices for noise prevention.
【０００２】[0002]
【従来の技術】今日、電子機器の小形化にともない電源
回路の高周波化や共振型の採用などさまざまな技術の進
歩にともなって発生するノイズが増大し、ノイズ対策の
問題が非常に重要となりラインフィルタも高周波化が強
く望まれている。2. Description of the Related Art Nowadays, with the miniaturization of electronic equipment, the noise generated as a result of various technological advances such as higher frequency of power supply circuits and adoption of resonance type, the problem of noise countermeasures becomes very important. There is also a strong demand for higher frequency filters.
【０００３】一般にラインフィルタは、電源回路におけ
る一対の線路とアース間で発生するコモンモードノイズ
成分を主に防止するために用いられ、このラインフィル
タの高周波での性能を向上させるためにはフィルタに存
在する分布容量をいかに低減するかが課題となってい
る。Generally, a line filter is mainly used to prevent a common mode noise component generated between a pair of lines and a ground in a power supply circuit. To improve the high frequency performance of the line filter, a line filter is used. The issue is how to reduce the existing distributed capacity.
【０００４】さらに、電子機器の小形化にともなって上
記性能面と同時にラインフィルタも小形化が要求されて
いる。これを実現する方法として樹脂注型することによ
ってフィルタの放熱性を高めフィルタを小形化すること
や、巻線構造により巻線どうしの磁気的な結合を大きく
し、ライン電流による磁心材料の磁気飽和が起こりにく
く、所定のインダクタンスを得るのに磁心材料の小形化
によりフィルタを小形化する方法などが用いられてい
る。Further, along with the miniaturization of electronic equipment, the line filter is required to be miniaturized at the same time as the above performance. As a method of achieving this, resin casting is used to enhance the heat dissipation of the filter and downsize the filter, and the magnetic coupling between the windings is increased by the winding structure to increase the magnetic saturation of the magnetic core material due to the line current. Is less likely to occur, and a method of downsizing the filter by downsizing the magnetic core material is used to obtain a predetermined inductance.
【０００５】以下に従来のラインフィルタについて説明
する。図１１は従来のラインフィルタの斜視図である。
図１１において、１６は分割ボビン、１７はＵＵ型閉磁
路磁心、３は引出しピン端子、１８と１９はそれぞれ閉
磁路磁心１７の一方の磁脚に巻装した一方の巻線部と他
方の巻線部、２１と２０はそれぞれ閉磁路磁心１７の相
対する他方の磁脚に巻装した一方の巻線部と他方の巻線
部を示している。さらに（Ａ）は巻線の巻線幅方向の引
出しピン端子３の接続方向、（Ｂ）は巻線の巻線方向の
引出しピン端子３の接続方向を示している。A conventional line filter will be described below. FIG. 11 is a perspective view of a conventional line filter.
In FIG. 11, 16 is a split bobbin, 17 is a UU-type closed magnetic circuit magnetic core, 3 is a lead-out pin terminal, and 18 and 19 are one winding part wound around one magnetic leg of the closed magnetic circuit magnetic core 17 and the other winding. Wire portions, 21 and 20, respectively indicate one winding portion and the other winding portion wound on the other magnetic leg of the closed magnetic circuit magnetic core 17 facing each other. Further, (A) shows the connection direction of the extraction pin terminals 3 in the winding width direction of the winding, and (B) shows the connection direction of the extraction pin terminals 3 in the winding direction of the winding.
【０００６】（Ａ），（Ｂ）の説明をするために図１
２，図１３にそれぞれ引出しピン端子３の接続方向
（Ａ），（Ｂ）の接続図を示した。ここで、２２は磁
束、２３はＡＣ電源、２４は負荷を示している。図１２
の引出しピン端子３の接続方向（Ａ）の場合は、ＡＣ電
源２３に対して引出しピン端子３は巻線幅方向に使用さ
れており、図１３の引出しピン端子３の接続方向（Ｂ）
の場合は、ＡＣ電源２３に対して引出しピン端子３は巻
線方向に接続されている。FIG. 1 is used to explain (A) and (B).
2 and FIG. 13 are connection diagrams of the lead-out pin terminals 3 in the connecting directions (A) and (B), respectively. Here, 22 is a magnetic flux, 23 is an AC power source, and 24 is a load. 12
In the connection direction (A) of the pull-out pin terminal 3 of FIG. 11, the pull-out pin terminal 3 is used in the winding width direction with respect to the AC power supply 23, and the connection direction (B) of the pull-out pin terminal 3 of FIG.
In the case of, the extraction pin terminal 3 is connected to the AC power supply 23 in the winding direction.
【０００７】図１１について構成を説明すると、分割ボ
ビン１６に一方の巻線部１８と他方の巻線部１９をそれ
ぞれ分割巻きに施し、さらにもう１個の分割ボビン１６
に一方の巻線部２１と他方の巻線部２０の残りを分割巻
きに施す。次にＵＵ型磁心１７をこの巻線を施した分割
ボビン１６に挿入固着して完成するものである。Referring to FIG. 11, the split bobbin 16 is provided with one winding portion 18 and the other winding portion 19 in separate windings, and another split bobbin 16 is provided.
Then, the remaining part of the one winding part 21 and the other winding part 20 is applied to the divided winding. Next, the UU type magnetic core 17 is inserted and fixed to the split bobbin 16 provided with this winding to complete.
【０００８】このとき、図１２，図１３に示すように巻
線部１８と巻線部１９、巻線部２０と２１は同一巻線回
数とし、ライン電流による磁束２２がそれぞれの磁脚内
で相殺される方向に巻線を施し、さらに巻線部１８と巻
線部２１、巻線部１９と巻線部２０が結線されたクロス
巻線構造になっている。以下この巻線構造をクロス巻線
構造と称する。At this time, as shown in FIGS. 12 and 13, the winding portions 18 and 19 and the winding portions 20 and 21 have the same number of windings, and the magnetic flux 22 due to the line current is generated in each magnetic leg. A cross winding structure is formed in which windings are provided in the canceling directions, and further, the winding portion 18 and the winding portion 21, and the winding portion 19 and the winding portion 20 are connected. Hereinafter, this winding structure will be referred to as a cross winding structure.
【０００９】従って引出しピン端子３の接続方向が巻線
幅方向である（Ａ）の場合、巻線方向は巻線部１８と巻
線部１９が同一で、これに対して巻線部２０と巻線部２
１が巻線部１８と巻線部１９とは逆方向になっている。
一方、引出しピン端子３の接続方向が巻線方向である
（Ｂ）の場合、巻線方向は巻線部１８と巻線部２０が同
一で、これに対して巻線部１９と巻線部２１が巻線部１
８と巻線部２０とは逆方向になっている。Therefore, in the case where the connecting direction of the lead-out pin terminals 3 is the winding width direction (A), the winding direction is the same for the winding portion 18 and the winding portion 19, and the winding direction is for the winding portion 20. Winding part 2
1, the winding portion 18 and the winding portion 19 are in opposite directions.
On the other hand, when the connecting direction of the lead-out pin terminal 3 is the winding direction (B), the winding direction is the same in the winding portion 18 and the winding portion 20, whereas the winding portion 19 and the winding portion 20 are the same. 21 is the winding part 1
8 and the winding portion 20 are in opposite directions.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら従来の図
１１に示す構成では、巻線部が分割巻きされているため
巻線の巻始めと巻終わりが離れる構成となり、巻線間に
生じる分布容量は低減でき、また巻線部にクロス巻線構
造を用いることにより漏れ磁束による漏れインダクタン
スが少なく、ライン電流による磁心材料の磁気飽和が起
こりにくいため、同一ライン電流、同一インダクタンス
を得るのに磁心材料の小形化が可能となりフィルタの小
形化が図れるものの、クロス巻線構造を用いるため、従
来例で示したように引出しピン端子３の接続方向は
（Ａ），（Ｂ）２種類存在する。However, in the conventional structure shown in FIG. 11, since the winding portion is divided and wound, the winding start and the winding end are separated from each other, and the distributed capacitance generated between the windings is Moreover, since the cross winding structure is used for the winding part, the leakage inductance due to the leakage flux is small and the magnetic saturation of the magnetic core material due to the line current does not easily occur. Although the filter can be miniaturized and the filter can be miniaturized, since the cross winding structure is used, there are two types of connection directions of the extraction pin terminal 3 (A) and (B) as shown in the conventional example.
【００１１】このため引出しピン端子３の接続方向が
（Ａ）の巻線幅方向の場合、大きな電位差があると共に
相対向する巻線部１８と巻線部１９間及び巻線部２０と
巻線部２１間に、引出しピン端子３の接続方向が（Ｂ）
の巻線方向の場合、大きな電位差があると共に相対向す
る巻線部１８と巻線部２０間及び巻線部１９と巻線部２
１間に、それぞれ結果的にラインフィルタの高周波イン
ピーダンス特性を低下させる大きな分布容量が生じる。Therefore, when the lead-out pin terminal 3 is connected in the winding width direction (A), there is a large potential difference and the winding portion 18 and the winding portion 19 face each other and the winding portion 20 and the winding portion 20 face each other. Between the parts 21, the connecting direction of the lead pin terminal 3 is (B).
In the case of the winding direction, the winding portion 18 and the winding portion 20 have a large potential difference and face each other, and the winding portion 19 and the winding portion 2
In each case, a large distributed capacitance that deteriorates the high frequency impedance characteristic of the line filter is generated.
【００１２】しかしながら、これらの巻線部どうしの対
向面積につながる巻線寸法や巻線部どうしの対向する状
態につながる上述の引出しピン端子３の２種類の接続方
向（Ａ），（Ｂ）は、プリント基板への取付けの形状
上、セット組み込み上、もしくは実装上等の分布容量と
は別の要素から決定されており、より高い高周波インピ
ーダンス特性を確保するフィルタとしては適切なもので
はない。However, the winding dimensions connecting the facing areas of these winding portions and the above-mentioned two connecting directions (A) and (B) of the lead-out pin terminal 3 connecting the winding portions facing each other are as follows. However, it is determined from factors other than the distribution capacitance such as mounting shape on a printed circuit board, mounting in a set, mounting, etc., and it is not suitable as a filter for ensuring higher high frequency impedance characteristics.
【００１３】図１４（ａ），（ｂ）、図１５（ａ），
（ｂ）にはそれぞれ引出しピン端子３の接続方向が
（Ａ），（Ｂ）の２種類の従来ラインフィルタのクロス
巻線構造の接続図、同ラインフィルタの断面図、そして
巻線部間どうしに生じる分布容量の発生状態を示す。こ
こで４はコモンモードノイズ源、９はコモンモードノイ
ズ源インピーダンス、１０はコモンモードラインインピ
ーダンス、１１はグランド、１２はコモンモードノイズ
の進入方向、ｌ1は巻線部の有効巻線高さ寸法、ｌ2は巻
線部の有効巻線幅寸法、Ｃ(A)，Ｃ(B)は両者とも巻線部
間に生じる分布容量を示している。14 (a), (b), FIG. 15 (a),
(B) is a connection diagram of a cross winding structure of two types of conventional line filters in which the drawing pin terminals 3 are connected in the directions (A) and (B) respectively, a cross-sectional view of the line filter, and the inter-winding parts. The generation state of the distributed capacitance that occurs in Fig. Here, 4 is a common mode noise source, 9 is a common mode noise source impedance, 10 is a common mode line impedance, 11 is a ground, 12 is a common mode noise entry direction, and l 1 is an effective winding height dimension of a winding portion. , L 2 is the effective winding width of the winding portion, and C (A) and C (B) are the distributed capacitances generated between the winding portions.
【００１４】図１４の引出しピン端子３の接続方向が
（Ａ）の巻線幅方向の場合、それぞれの巻線部１８，１
９，２０，２１の巻線断面図の巻線寸法において、巻線
の有効巻線幅寸法ｌ2に対して有効巻線高さ寸法ｌ1が大
きいため大きな電位差が生じる巻線部１８と巻線部１
９、巻線部２０と巻線部２１が、非常に対向面積が広く
距離が接近した状態になり、両者の巻線部どうし間に大
きな分布容量Ｃ(A)がそれぞれ生じる。When the connecting direction of the lead-out pin terminal 3 of FIG. 14 is the winding width direction of (A), the respective winding portions 18, 1
In the winding dimensions of the winding cross-sectional views of 9, 20, and 21, the effective winding height dimension l 1 is larger than the effective winding width dimension l 2 of the winding, so that a large potential difference occurs between the winding portion 18 and the winding portion 18. Line 1
9. The winding part 20 and the winding part 21 are in a state where the facing areas are very wide and close to each other, and a large distributed capacitance C (A) is generated between the two winding parts.
【００１５】一方、図１５の引出しピン端子３の接続方
向が（Ｂ）の巻線方向の場合は、巻線断面図の巻線寸法
において、巻線の有効巻線高さ寸法ｌ1に対して有効巻
線幅寸法ｌ2が大きいため大きな電位差が生じる巻線部
１８と巻線部２０、巻線部１９と巻線部２１が非常に対
向面積が広く距離が接近した状態になり、両者の巻線部
間どうしに大きな分布容量Ｃ(B)がそれぞれ生じる。こ
れらの巻線部間に生じる分布容量Ｃ(A)，Ｃ(B)はライン
フィルタの高周波インピーダンスを大きく低下させる。On the other hand, when the connecting direction of the lead-out pin terminal 3 in FIG. 15 is the winding direction (B), in the winding dimension of the winding sectional view, the effective winding height dimension l 1 of the winding is Since the effective winding width dimension l 2 is large, a large potential difference is generated, so that the winding portions 18 and 20, and the winding portions 19 and 21 have a very large opposing area and are close to each other. A large distributed capacitance C (B) is generated between the winding parts of each. The distributed capacitances C (A) and C (B) generated between these winding portions greatly reduce the high frequency impedance of the line filter.
【００１６】さらに温度上昇低減の目的でこのフィルタ
を樹脂注型したものは巻線部間に生じる分布容量
Ｃ(A)，Ｃ(B)の値はさらに非常に大きくなるため、ライ
ンフィルタの高周波インピーダンス特性がより大きく低
下する欠点が顕著になる。Further, in the case where this filter is molded with resin for the purpose of reducing the temperature rise, the distributed capacitances C (A) and C (B) generated between the winding portions become much larger, so that the high frequency of the line filter is increased. The disadvantage that the impedance characteristic is significantly reduced becomes remarkable.
【００１７】このように従来のクロス巻線構造を持つラ
インフィルタは引出しピン端子の接続方向と巻線寸法が
特性低下に大きく関与しているにもかかわらず、先にも
述べたように引出しピン端子の接続方向や巻線寸法はこ
れまでラインフィルタの特性とは別の要素で決定されて
きた。As described above, in the conventional line filter having the cross winding structure, although the connecting direction of the extraction pin terminal and the winding size greatly contribute to the deterioration of the characteristics, as described above. Up to now, the connection direction of terminals and winding dimensions have been determined by factors other than the characteristics of line filters.
【００１８】本発明は以上のような問題点を解決するも
のであり、同一ライン電流、同一インダクタンスを得る
のに小形化が図れる従来と同様のクロス巻線構造におい
て、このクロス巻線構造の欠点である巻線部間に生じた
分布容量を巻線寸法とピン端子の接続方向を最適化を図
ることにより最も低減して、より高い高周波インピーダ
ンス特性を確保できるラインフィルタを簡単、高品質構
造で提供するものである。The present invention solves the above-mentioned problems, and in the conventional cross winding structure which can be miniaturized to obtain the same line current and the same inductance, the drawbacks of the cross winding structure are as follows. The distributed capacitance generated between the winding parts is minimized by optimizing the winding size and the connection direction of the pin terminals, and the line filter that can secure higher high frequency impedance characteristics is simple and has a high quality structure. It is provided.
【００１９】さらに温度上昇低減などの目的で樹脂注型
材料により注型しても樹脂誘電率による高周波インピー
ダンスへの悪影響は大きく低減でき、高周波インピーダ
ンス特性の低下が少ない樹脂注型ラインフィルタを提供
するものである。Further, even if a resin casting material is used for the purpose of reducing the temperature rise and the like, the adverse effect of the resin dielectric constant on the high frequency impedance can be greatly reduced, and a resin casting line filter with less deterioration of the high frequency impedance characteristics is provided. It is a thing.
【００２０】[0020]
【課題を解決するための手段】上記課題を解決するため
に本発明は、閉磁路磁心の一方の磁脚に一方の巻線と他
方の巻線の一部をそれぞれライン電流による磁束がこの
磁脚内で相殺される巻線方向に巻線するとともに、上記
閉磁路磁心の相対向する他方の磁脚に一方の巻線と他方
の巻線の残りをそれぞれライン電流による磁束がこの磁
脚内で相殺される巻線方向に巻線し、両方の磁脚に巻線
された一方の巻線と他方の巻線とを互いに対向する位置
に配置するとともに、それぞれ一方の巻線どうしと他方
の巻線どうしとを結線しており、全ての巻線は巻線断面
の有効巻線幅寸法よりも有効巻線高さ寸法が短くなるよ
うに巻線するとともに、一方の磁脚に巻線した一方の巻
線および他方の磁脚に巻線した他方の巻線に対してコモ
ンモードノイズを進入させた構成である。 また、閉磁路
磁心の一方の磁脚に一方の巻線と他方の巻線の一部をそ
れぞれライン電流による磁束がこの磁脚内で相殺される
巻線方向に巻線するとともに、上記閉磁路磁心の相対向
する他方の磁脚に一方の巻線と他方の巻線の残りをそれ
ぞれライン電流による磁束がこの磁脚内で相殺される巻
線方向に巻線し、両方の磁脚に巻線された一方の巻線と
他方の巻線とを互いに対向する位置に配置するととも
に、それぞれ一方の巻線どうしと他方の巻線どうしとを
結線しており、全ての巻線は巻線断面の有効巻線高さ寸
法よりも有効巻線幅寸法が短くなるように巻線するとと
もに、一方の磁脚に巻線した一方の巻線および一方の磁
脚に巻線した他方の巻線に対してコモンモードノイズを
進入させた構成である。 SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is directed to one magnetic leg of a closed magnetic circuit core and one winding and another winding.
Magnetic flux due to line current is
While winding in the winding direction that cancels out in the magnetic leg,
One winding and the other on the opposite magnetic leg of the closed magnetic circuit core
The rest of the windings of the
Wind in the winding direction that cancels out in the leg, and wind on both magnetic legs
Position where one winding and the other winding are opposed to each other
The windings on one side and the other on the other side.
The windings are connected to each other and all windings are
The effective winding height dimension is shorter than the effective winding width dimension of
One winding with one magnetic leg
Wire and the other winding on the other magnetic leg
This is a configuration in which single mode noise is introduced. Also, closed magnetic circuit
Place one winding and a part of the other winding on one magnetic leg of the magnetic core.
The magnetic flux due to the line current is canceled in each magnetic leg.
Wind in the winding direction and face each other with the closed magnetic circuit core facing each other.
Do the one winding and the rest of the other winding to the other magnetic leg
The windings where the magnetic flux due to each line current is canceled out in this magnetic leg
Winding in the line direction, with one winding on both magnetic legs
When the other winding and the other winding are placed
To one winding and the other winding
All the windings are connected, and the effective winding height of the winding cross section
When the winding is performed so that the effective winding width dimension is shorter than the method
One winding and one magnet wound on one magnetic leg
Common mode noise is applied to the other winding on the leg.
It is a configuration that has entered.
【００２１】[0021]
【作用】この構成によって、ラインフィルタの同一ライ
ン電流、同一インダクタンスを得るのに小形化が図れる
従来と同様のクロス巻線構造を利用して、巻線寸法と引
出しピン端子の接続方向を最適化することにより、クロ
ス巻線構造を用いた従来ラインフィルタの欠点である大
きな電位差があると共に広い面積で対向した巻線部どう
し間に生じる分布容量を大きく低減できる。また、この
構造は非常に簡単であるため高品質なものが実現でき
る。With this structure, the same cross-winding structure that can be downsized to obtain the same line current and the same inductance of the line filter is utilized, and the winding size and the connecting direction of the lead pin terminal are optimized. By doing so, there is a large potential difference, which is a drawback of the conventional line filter using the cross winding structure, and it is possible to greatly reduce the distributed capacitance generated between the winding parts facing each other in a wide area. Moreover, since this structure is very simple, a high quality product can be realized.
【００２２】以上の理由により、小形でより高い高周波
インピーダンスを持つラインフィルタを高品質で提供で
きる。For the above reasons, it is possible to provide a small-sized line filter having a higher high-frequency impedance with high quality.
【００２３】さらにラインフィルタの温度上昇低減など
の目的で樹脂注型材料により注型しても樹脂誘電率によ
る分布容量増加は軽減でき高周波インピーダンスへの悪
影響は大きく低減できるため、高周波インピーダンス特
性の低下が少ない樹脂注型のラインフィルタを生み出
す。Further, even if the resin is cast with a resin casting material for the purpose of reducing the temperature rise of the line filter, the increase of the distributed capacitance due to the resin dielectric constant can be reduced and the adverse effect on the high frequency impedance can be greatly reduced. Produces a resin cast line filter with less
【００２４】[0024]
【実施例】以下、本発明の一実施例を図面を用いて説明
する。図１，図２，図３において、図１１〜図１５にお
ける従来と同一の構成の部分には同一番号を付して詳細
な説明を省略する。図１は本発明の第１の実施例を示す
ラインフィルタの斜視図である。図２（ａ），（ｂ）は
同ラインフィルタの接続図と断面図、そして巻線間に生
じる分布容量の発生状態を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1, FIG. 2 and FIG. 3, parts having the same configurations as those of the related art in FIGS. 11 to 15 are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 is a perspective view of a line filter showing a first embodiment of the present invention. 2 (a) and 2 (b) are a connection diagram and a cross-sectional view of the same line filter, and a generation state of distributed capacitance generated between windings.
【００２５】図１，図２において、１はボビン、２はＵ
Ｕ型閉磁路磁心、５と６はそれぞれ閉磁路磁心２の一方
の磁脚に巻装した一方の巻線部と他方の巻線部、８と７
はそれぞれ閉磁路磁心２の相対する他方の磁脚に巻装し
た一方の巻線部と他方の巻線部、Ｃは巻線間に生じる分
布容量を示している。1 and 2, 1 is a bobbin and 2 is a U.
The U-shaped closed magnetic circuit cores 5 and 6 are one winding part and the other winding part wound around one magnetic leg of the closed magnetic circuit core 2, and 8 and 7, respectively.
Indicates a winding portion and the other winding portion, which are respectively wound around the other magnetic legs of the closed magnetic circuit magnetic core 2 which face each other, and C indicates a distributed capacitance generated between the windings.
【００２６】以下構成を説明すると、ボビン１に一方の
巻線部５と他方の巻線部６をそれぞれ有効巻線高さ寸法
ｌ1が有効巻線幅寸法ｌ2に対して小さくなるように施
し、さらにもう１個のボビン１に上記同様の巻線寸法で
一方の巻線部８と他方の巻線部７を施し、ＵＵ型の閉磁
路磁心２をこの巻線を施したボビン１に挿入固着して完
成するものである。このとき巻線部５と巻線部６、巻線
部８と巻線部７巻線はそれぞれ同一巻線回数で、図２に
示すように巻線部５と巻線部８、巻線部６と巻線部７が
結線された従来と同様のクロス巻線構造になっている。
さらに巻線方向は巻線部５と巻線部６が同一で、これに
対して巻線部７と巻線部８が巻線部５と巻線部６に対し
て逆方向になっている。In the following, the bobbin 1 is provided with one winding portion 5 and the other winding portion 6 such that the effective winding height dimension l 1 is smaller than the effective winding width dimension l 2 . Then, another bobbin 1 is provided with one winding part 8 and the other winding part 7 with the same winding size as above, and the UU type closed magnetic circuit magnetic core 2 is applied to the bobbin 1 having this winding. It is completed by inserting and fixing. At this time, the winding part 5 and the winding part 6, and the winding part 8 and the winding part 7 respectively have the same number of windings, and as shown in FIG. It has a cross winding structure similar to the conventional one in which 6 and the winding portion 7 are connected.
Furthermore, the winding direction is the same for the winding portion 5 and the winding portion 6, whereas the winding portion 7 and the winding portion 8 are opposite to the winding portion 5 and the winding portion 6. .
【００２７】このため、巻線部５と巻線部６、巻線部７
と巻線部８のライン電流により生じる磁束がそれぞれの
磁脚内で相殺されるようになっており、引出しピン端子
３の接続方向は巻線の巻線幅方向（Ａ）になっている。Therefore, the winding portion 5, the winding portion 6, and the winding portion 7
The magnetic flux generated by the line current of the winding portion 8 is canceled in each magnetic leg, and the connecting direction of the lead-out pin terminal 3 is the winding width direction (A) of the winding.
【００２８】次に図３（ａ），（ｂ）に本発明の第２の
実施例を示すラインフィルタで、図１，図２の引出しピ
ン端子３の接続方向が巻線幅方向の（Ａ）に対して、巻
線方向（Ｂ）の場合のラインフィルタの接続図、断面
図、そして巻線部間に生じる分布容量の発生状態を示
す。Next, FIGS. 3 (a) and 3 (b) are line filters showing a second embodiment of the present invention, in which the connecting direction of the lead-out pin terminals 3 in FIGS. 1 and 2 is the winding width direction (A). ), A connection diagram of the line filter in the winding direction (B), a cross-sectional view, and a generation state of distributed capacitance generated between the winding portions are shown.
【００２９】以下構成を説明すると、ボビン１に一方の
巻線部５と他方の巻線部７をそれぞれ有効巻線幅寸法ｌ
2が有効巻線高さ寸法ｌ1に対して小さくなるように施
し、さらにもう１個のボビン１に上記同様の巻線寸法で
一方の巻線部８と他方の巻線部６を施し、ＵＵ型の閉磁
路磁心２をこの巻線を施したボビン１に挿入固着して完
成するものである。The structure will be described below. The bobbin 1 is provided with one winding portion 5 and the other winding portion 7 respectively, and an effective winding width dimension l.
2 is smaller than the effective winding height dimension l 1 , and one bobbin 1 is further provided with one winding portion 8 and the other winding portion 6 with the same winding dimensions as above. The UU type closed magnetic circuit magnetic core 2 is inserted and fixed to the bobbin 1 provided with this winding to complete.
【００３０】このとき巻線部５と巻線部７、巻線部８と
巻線部６の巻線はそれぞれ同一巻線回数で、接続図に示
すように巻線部５と巻線部８、巻線部７と巻線部６が結
線された従来と同様のクロス巻線構造になっている。さ
らに巻線方向は巻線部５と巻線部６が同一で、これに対
して巻線部７と巻線部８が巻線部５と巻線部６に対して
逆方向になっている。このため、巻線部５と巻線部７、
巻線部６と巻線部８のライン電流により生じる磁束がそ
れぞれの磁脚内で相殺されるようになっており、引出し
ピン端子３の接続方向は巻線の巻線方向（Ｂ）になって
いる。At this time, the winding portion 5 and the winding portion 7, and the winding portion 8 and the winding portion 6 respectively have the same number of windings, and as shown in the connection diagram, the winding portion 5 and the winding portion 8 are wound. The winding section 7 and the winding section 6 are connected to each other to form a cross winding structure similar to the conventional one. Furthermore, the winding direction is the same for the winding portion 5 and the winding portion 6, whereas the winding portion 7 and the winding portion 8 are opposite to the winding portion 5 and the winding portion 6. . Therefore, the winding part 5 and the winding part 7,
The magnetic fluxes generated by the line currents of the winding portion 6 and the winding portion 8 cancel each other out in the respective magnetic legs, and the connecting direction of the extraction pin terminal 3 is the winding direction (B) of the winding. ing.
【００３１】以上のように第１および第２の実施例によ
れば、従来と同様にクロス巻線構造を用いることによ
り、漏れ磁束による漏れインダクタンスが少なく、同一
ライン電流、同一インダクタンスを得るのに磁心材料の
小形化が可能なためフィルタの小型化を図れる利点を有
しながら、クロス巻線構造の欠点であった巻線部間どう
しに生じる分布容量を大幅に低減することができる。な
ぜなら、第１の実施例では、図２に示すように、全ての
巻線は巻線断面の有効巻線幅寸法ｌ 2 よりも有効巻線高
さ寸法ｌ 1 が短くなるように巻線するとともに、一方の
磁脚に巻線した一方の巻線および他方の磁脚に巻線した
他方の巻線に対してコモンモードノイズを進入させてい
るため、電位差の生じた巻線部５と巻線部６、巻線部７
と巻線部８どうしが非常に対向面積の小さい状態で、し
かも距離が離れ、巻線部間に生じる分布容量Ｃは非常に
小さくなり、より高い高周波インピーダンスを確保でき
る。As described above, according to the first and second embodiments, by using the cross winding structure as in the conventional case, the leakage inductance due to the leakage magnetic flux is small and the same line current and the same inductance can be obtained. Since the magnetic core material can be downsized, the filter can be downsized, and the distributed capacitance generated between the winding portions, which is a drawback of the cross winding structure, can be significantly reduced. This is because, in the first embodiment, as shown in FIG. 2, all
The winding has an effective winding height larger than the effective winding width dimension l 2 of the winding cross section.
Winding so that the length l 1 becomes short,
Winding on magnetic leg One winding and winding on the other magnetic leg
Common mode noise is being injected into the other winding.
Therefore, the winding portion 5, the winding portion 6, and the winding portion 7 in which the potential difference occurs
In the state where the winding parts 8 and the winding parts 8 have a very small opposing area, and the distance is large, the distributed capacitance C generated between the winding parts is very small, and a higher high frequency impedance can be secured.
【００３２】また第２の実施例では図３に示すように、
全ての巻線は巻線断面の有効巻線高さ寸法ｌ 1 よりも有
効巻線幅寸法ｌ 2 が短くなるように巻線するとともに、
一方の磁脚に巻線した一方の巻線および一方の磁脚に巻
線した他方の巻線に対してコモンモードノイズを進入さ
せているので、電位差の生じた巻線部５、巻線部６、巻
線部７と巻線部８どうしが非常に対向面積の小さい状態
で、しかも距離が離れ、巻線部間に生じる分布容量Ｃは
非常に小さくなり、より高い高周波インピーダンスを確
保できる。In the second embodiment, as shown in FIG.
All windings have more than the effective winding height dimension l 1 of the winding cross section
Winding is done so that the effective winding width dimension l 2 becomes shorter,
Winding on one magnetic leg and one winding on one magnetic leg
Inject common mode noise into the other winding.
Since the winding portion 5, the winding portion 6, and the winding portion 7 and the winding portion 8 in which the potential difference is generated have a very small opposing area, the distance is large and the winding portions are generated between the winding portions. The distributed capacitance C becomes very small, and a higher high frequency impedance can be secured.
【００３３】次に本発明の第３の実施例を図面を参照し
ながら説明する。図４は本発明の第３の実施例を示すラ
インフィルタで、本発明の第１の実施例の図１と図２に
示すラインフィルタを樹脂注型できるボビン構造にして
樹脂注型したものの斜視図である。図５は同ラインフィ
ルタの分解斜視図である。図６は同ラインフィルタの断
面図である。図７は図６の樹脂注型用ボビンの外周面に
分割つばを設け、丸線を多層に分割巻したラインフィル
タを樹脂注型したものの断面図である。図８は樹脂注型
用のボビンに丸線を１層巻にしたラインフィルタを樹脂
注型したものの断面図である。図９は樹脂注型用ボビン
に平角導線をスパイラル状に巻線したラインフィルタを
樹脂注型したものの断面図である。Next, a third embodiment of the present invention will be described with reference to the drawings. 4 is a line filter showing a third embodiment of the present invention. A perspective view of the line filter shown in FIGS. 1 and 2 of the first embodiment of the present invention, which has a bobbin structure capable of resin casting and is resin-cast. It is a figure. FIG. 5 is an exploded perspective view of the line filter. FIG. 6 is a sectional view of the line filter. FIG. 7 is a cross-sectional view of the resin casting bobbin of FIG. 6 provided with a split collar on the outer peripheral surface, and a line filter in which a round wire is split and wound in multiple layers is resin cast. FIG. 8 is a cross-sectional view of a resin-casting line filter having a round wire wound in one layer on a resin-casting bobbin. FIG. 9 is a cross-sectional view of a resin casting bobbin in which a line filter in which a rectangular conductor is spirally wound is resin-cast.
【００３４】図４〜図９において、１３は本発明の第１
の実施例の図１と図２で示したラインフィルタのボビン
を樹脂注型が行えるようにしたボビン、１３ａはさらに
これに分割巻ができるようにしたボビンで、１３ｂは分
割つば、１４はケース、１５は樹脂注型材料を示してい
る。In FIGS. 4 to 9, 13 is the first of the present invention.
The bobbin of the line filter shown in FIGS. 1 and 2 of the embodiment of FIG. 1 is a bobbin that can be cast by resin, 13a is a bobbin that can be further divided, 13b is a split collar, and 14 is a case. , 15 are resin casting materials.
【００３５】図４〜図６について構成を説明すると、樹
脂注型用ボビン１３に一方の巻線部５と他方の巻線部６
をそれぞれ有効巻線高さ寸法ｌ1が有効巻線幅寸法ｌ2に
対して小さくなるように施し、さらにもう１個のボビン
１３に上記巻線寸法で一方の巻線部８と他方の巻線部７
を施し、ＵＵ型の閉磁路磁心２をこの巻線を施したボビ
ン１３に挿入固着して完成させたラインフィルタをケー
ス１４に嵌合させ、樹脂注型材料１５を用いてケース１
４に注型して硬化させたものである。The structure will be described with reference to FIGS. 4 to 6, in which the resin casting bobbin 13 has one winding portion 5 and the other winding portion 6.
So that the effective winding height dimension l 1 becomes smaller than the effective winding width dimension l 2 , and further, one bobbin 13 and the other winding portion 8 are wound on the other bobbin 13 with the above winding dimension. Line 7
The UU type closed magnetic circuit magnetic core 2 is inserted into and fixed to the bobbin 13 having this winding, and the completed line filter is fitted into the case 14 and the resin casting material 15 is used to form the case 1.
It was cast in 4 and cured.
【００３６】このとき巻線部５と巻線部６、巻線部８と
巻線部７の巻線は同一巻線回数で、巻線部５と巻線部
８、巻線部６と巻線部７が結線されたクロス巻線構造に
なっている。さらに巻線方向は巻線部５と巻線部６が同
一で、巻線部８と巻線部７が巻線部５と巻線部６に対し
て逆方向になっている。このため巻線部５と巻線部６、
巻線部８と巻線部７のライン電流により生じる磁束がそ
れぞれの磁脚内で相殺され、引出しピン端子３の接続方
向は巻線幅方向（Ａ）になっている。つまり、図１，図
２に示す本発明の第１の実施例ラインフィルタの巻線部
のみを樹脂注型した構成である。At this time, the winding portions 5 and 6 and the winding portions 8 and 7 have the same number of windings, and the winding portion 5 and the winding portion 8 and the winding portion 6 are wound. It has a cross winding structure in which the wire portions 7 are connected. Further, the winding direction is the same for the winding portion 5 and the winding portion 6, and the winding portion 8 and the winding portion 7 are opposite to the winding portion 5 and the winding portion 6. Therefore, the winding part 5 and the winding part 6,
The magnetic flux generated by the line currents of the winding portion 8 and the winding portion 7 is canceled in each magnetic leg, and the connecting direction of the extraction pin terminal 3 is the winding width direction (A). That is, this is a configuration in which only the winding portion of the line filter of the first embodiment of the present invention shown in FIGS.
【００３７】また、図７〜図９については上述と同じ樹
脂注型構成と巻線構造の条件の中で、図７は丸導線を分
割多層、図８は丸線を１層、そして図９は平角導線をス
パイラル状に巻線を施したラインフィルタである。7 to 9, under the same resin casting structure and winding structure conditions as described above, FIG. 7 is a multi-layered circular conductor, FIG. 8 is one rounded wire, and FIG. Is a line filter in which a rectangular conductor is wound in a spiral shape.
【００３８】以上のように樹脂注型した第３の実施例で
は、ケース１４および樹脂注型材料１５を用いて樹脂の
高放熱によるラインフィルタの小形化、安全性、信頼成
の向上を図るために樹脂注型しても、本発明の第１の実
施例で述べたようにクロス巻線構造の欠点である巻線部
間に生じる分布容量を大きく低減できるため、樹脂誘電
率により引き起こる分布容量の増加にともなう高周波イ
ンピーダンスへの悪影響は大きく低減できる。このた
め、より高い高周波インピーダンスが確保できる樹脂注
型ラインフィルタを生み出す。In the third embodiment in which the resin is cast as described above, the case 14 and the resin casting material 15 are used to reduce the size of the line filter due to high heat dissipation of the resin, and to improve safety and reliability. Even if the resin is cast into the resin, the distribution capacitance generated between the winding portions, which is a drawback of the cross winding structure as described in the first embodiment of the present invention, can be greatly reduced. The adverse effect on the high frequency impedance due to the increase in capacitance can be greatly reduced. For this reason, a resin cast line filter that can secure a higher high frequency impedance is created.
【００３９】本実施例による図４の樹脂注型ラインフィ
ルタと従来例による図１１によるラインフィルタを樹脂
注型したもののインピーダンスの周波数特性を図１０に
示した。その結果、１ＭＨｚ程度までの比較的低い周波
数領域では本実施例と従来例の樹脂注型ラインフィルタ
のインピーダンスはほぼ同じである。これに対して１Ｍ
Ｈｚ以上の高周波領域では本実施例のフィルタが従来例
と比較して約２倍の大きなインピーダンス値を示した。
これは、上述したように本実施例のフィルタの方が高周
波インピーダンスの低減につながる巻線部間に生じる分
布容量が小さいためであると考えられる。FIG. 10 shows the impedance frequency characteristics of the resin-cast line filter of FIG. 4 according to the present embodiment and the line filter of FIG. 11 according to the conventional example, which are resin-cast. As a result, the impedances of the resin cast line filters of this embodiment and the conventional example are almost the same in a relatively low frequency region up to about 1 MHz. On the other hand, 1M
In the high frequency region of Hz or higher, the filter of the present embodiment showed an impedance value about twice as large as that of the conventional example.
This is considered to be because the filter of the present embodiment has a smaller distributed capacitance between the winding portions, which leads to a reduction in high frequency impedance, as described above.
【００４０】[0040]
【発明の効果】以上のように本発明のラインフィルタ
は、閉磁路磁心の一方の磁脚に一方の巻線と他方の巻線
の一部をそれぞれライン電流による磁束がこの磁脚内で
相殺される巻線方向に巻線するとともに、上記閉磁路磁
心の相対向する他方の磁脚に一方の巻線と他方の巻線の
残りをそれぞれライン電流による磁束がこの磁脚内で相
殺される巻線方向に巻線し、両方の磁脚に巻線された一
方の巻線と他方の巻線とを互いに対向する位置に配置す
るとともに、それぞれ一方の巻線どうしと他方の巻線ど
うしとを結線しており、全ての巻線は巻線断面の有効巻
線幅寸法よりも有効巻線高さ寸法が短くなるように巻線
するとともに、一方の磁脚に巻線した一方の巻線および
他方の磁脚に巻線した他方の巻線に対してコモンモード
ノイズを進入させた構成により、同一ライン電流、同一
インダクタンスを得るのに小形化が図れる利点を持つ従
来と同様のクロス巻線構造を利用して、このクロス巻線
構造の欠点である巻線部間に生じる分布容量を大きく低
減してより高い高周波インピーダンスを確保できる。As described above, according to the line filter of the present invention , one winding and the other winding are provided on one magnetic leg of the closed magnetic circuit magnetic core.
In this magnetic leg, the magnetic flux due to the line current
The winding is wound in the winding direction that is offset, and
One winding and the other winding on the other magnetic leg facing each other
The rest of the magnetic flux due to the line current is phased in this magnetic leg.
It is wound in the winding direction to be killed and is wound on both magnetic legs.
Place one winding and the other winding in opposite positions
And one winding and the other winding, respectively.
The cows are connected and all windings are effective windings in the winding cross section.
Winding so that the effective winding height dimension is shorter than the wire width dimension.
And one winding wound on one magnetic leg and
Common mode for the other winding wound on the other magnetic leg
By using the same cross winding structure as the conventional one, which has the advantage that it can be downsized to obtain the same line current and the same inductance due to the configuration in which noise is introduced , the winding part which is a drawback of this cross winding structure It is possible to greatly reduce the distributed capacitance generated between them and secure a higher high frequency impedance.
【００４１】また、温度上昇低減などの目的で樹脂注型
材料により注型しても、樹脂誘電率により引き起こる分
布容量の増加にともなう高周波インピーダンス特性の低
減を大きく改善できる。Further, even when the resin casting material is used for the purpose of reducing the temperature rise, the reduction of the high frequency impedance characteristic due to the increase of the distributed capacitance caused by the resin dielectric constant can be greatly improved.
【００４２】さらに、非常に簡単な構造のため、高品質
で特性を確保できる等の多大な効果が得られ、小形で高
い高周波インピーダンスを確保できるラインフィルタを
簡単な構造、且つ高品質で提供することができ工業価値
大なるものである。Further, since the structure is very simple, a great effect such as high quality characteristics can be obtained, and a small-sized line filter which can secure high high frequency impedance is provided with a simple structure and high quality. It is of great industrial value.
【図１】本発明の第１の実施例を示すラインフィルタの
斜視図FIG. 1 is a perspective view of a line filter showing a first embodiment of the present invention.
【図２】（ａ），（ｂ）同ラインフィルタの接続図と断
面図2A and 2B are connection diagrams and cross-sectional views of the same line filter.
【図３】（ａ），（ｂ）本発明の第２の実施例を示すラ
インフィルタの接続図と断面図3 (a) and 3 (b) are connection diagrams and sectional views of a line filter showing a second embodiment of the present invention.
【図４】本発明の第３の実施例を示すラインフィルタの
斜視図FIG. 4 is a perspective view of a line filter showing a third embodiment of the present invention.
【図５】同ラインフィルタの分解斜視図FIG. 5 is an exploded perspective view of the line filter.
【図６】同ラインフィルタの断面図FIG. 6 is a sectional view of the line filter.
【図７】巻線方法の異なる同ラインフィルタの断面図FIG. 7 is a sectional view of the same line filter with different winding methods.
【図８】巻線方法の異なる同ラインフィルタの断面図FIG. 8 is a sectional view of the same line filter with different winding methods.
【図９】巻線方法の異なる同ラインフィルタの断面図FIG. 9 is a sectional view of the same line filter with different winding methods.
【図１０】本発明と従来の樹脂注型ラインフィルタのイ
ンピーダンスの周波数特性図FIG. 10 is a frequency characteristic diagram of impedance of the present invention and a conventional resin cast line filter.
【図１１】従来ラインフィルタの斜視図FIG. 11 is a perspective view of a conventional line filter.
【図１２】従来ラインフィルタの接続図FIG. 12 is a connection diagram of a conventional line filter.
【図１３】従来ラインフィルタの接続図FIG. 13 is a connection diagram of a conventional line filter.
【図１４】（ａ），（ｂ）従来ラインフィルタの接続図
と断面図14A and 14B are connection diagrams and cross-sectional views of a conventional line filter.
【図１５】（ａ），（ｂ）従来ラインフィルタの接続図
と断面図15 (a) and 15 (b) are connection diagrams and cross-sectional views of a conventional line filter.
１ ボビン ２ ＵＵ型の閉磁路磁心 ３ 引出しピン端子 ４ コモンモードノイズ源 ５，８ 一方の巻線部 ６，７ 他方の巻線部 ９ コモンモードノイズ源インピーダンス １０ コモンモードラインインピーダンス １１ グランド １２ コモンモードノイズ経路 １３ 樹脂注型用ボビン １３ａ 樹脂注型用ボビン １４ ケース １５ 樹脂注型材料 （Ａ） 引出しピン端子接続方向（巻線幅方向） （Ｂ） 引出しピン端子接続方向（巻線径方向） ｌ1 有効巻線高さ寸法 ｌ2 有効巻線幅寸法 Ｃ 巻線部間に生じる分布容量（本実施例）1 bobbin 2 UU type closed magnetic circuit magnetic core 3 lead-out pin terminal 4 common mode noise source 5, 8 one winding part 6, 7 other winding part 9 common mode noise source impedance 10 common mode line impedance 11 ground 12 common mode Noise path 13 Resin casting bobbin 13a Resin casting bobbin 14 Case 15 Resin casting material (A) Drawing pin terminal connection direction (winding width direction) (B) Drawing pin terminal connection direction (winding diameter direction) l 1 Effective winding height dimension l 2 Effective winding width dimension C Distributed capacitance generated between winding parts (this embodiment)
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 37/00 H01F 17/06 H01F 19/00 H01F 27/28 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) H01F 37/00 H01F 17/06 H01F 19/00 H01F 27/28
Claims (2)
他方の巻線の一部をそれぞれライン電流による磁束がこ
の磁脚内で相殺される巻線方向に巻線するとともに、上
記閉磁路磁心の相対向する他方の磁脚に一方の巻線と他
方の巻線の残りをそれぞれライン電流による磁束がこの
磁脚内で相殺される巻線方向に巻線し、両方の磁脚に巻
線された一方の巻線と他方の巻線とを互いに対向する位
置に配置するとともに、それぞれ一方の巻線どうしと他
方の巻線どうしとを結線しており、全ての巻線は巻線断
面の有効巻線幅寸法よりも有効巻線高さ寸法が短くなる
ように巻線するとともに、一方の磁脚に巻線した一方の
巻線および他方の磁脚に巻線した他方の巻線に対してコ
モンモードノイズを進入させたラインフィルタ。1. A winding of one winding and a part of the other winding on one magnetic leg of a closed magnetic circuit core are wound in a winding direction in which magnetic flux due to a line current is canceled in the magnetic leg . the closed magnetic circuit flux by the respective line current remaining windings and other winding of hand the magnetic leg opposing the other magnetic core is wound in the winding direction is canceled in this magnetic legs, both with arranging the one of the windings and the other winding is wound on magnetic legs so as to be opposite to each other, and by connecting one of the winding to each other, respectively and the other winding each other, all of the windings Winding break
The effective winding height dimension is shorter than the effective winding width dimension of the surface
And one of the magnetic legs
For the winding and the other winding on the other magnetic leg,
A line filter that has introduced mon-mode noise .
他方の巻線の一部をそれぞれライン電流による磁束がこThe magnetic flux generated by the line current flows through a part of the other winding.
の磁脚内で相殺される巻線方向に巻線するとともに、上Wind in the winding direction that is canceled in the magnetic leg of
記閉磁路磁心の相対向する他方の磁脚に一方の巻線と他One winding and the other on the other magnetic leg facing each other of the closed magnetic circuit core.
方の巻線の残りをそれぞれライン電流による磁束がこのThe magnetic fluxes from the line currents
磁脚内で相殺される巻線方向に巻線し、両方の磁脚に巻Wind in the winding direction that cancels out in the magnetic legs, and wind on both magnetic legs.
線された一方の巻線と他方の巻線とを互いに対向する位Position one winding and the other that are wired
置に配置するとともに、それぞれ一方の巻線どうしと他Placed on one side, and one winding on the other and the other
方の巻線どうしとを結線しており、全ての巻線は巻線断One winding is connected to the other, and all windings are disconnected.
面の有効巻線高さ寸法よりも有効巻線幅寸法が短くなるThe effective winding width dimension is shorter than the effective winding height dimension of the surface
ように巻線するとともに、一方の磁脚に巻線した一方のAnd one of the magnetic legs
巻線および一方の磁脚に巻線した他方の巻線に対してコFor the winding and the other winding on one magnetic leg,
モンモードノイズを進入させたラインフィルタ。A line filter that has introduced mon-mode noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08298193A JP3396908B2 (en) | 1993-04-09 | 1993-04-09 | Line filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08298193A JP3396908B2 (en) | 1993-04-09 | 1993-04-09 | Line filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06295834A JPH06295834A (en) | 1994-10-21 |
| JP3396908B2 true JP3396908B2 (en) | 2003-04-14 |
Family
ID=13789402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08298193A Expired - Fee Related JP3396908B2 (en) | 1993-04-09 | 1993-04-09 | Line filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3396908B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004052299A1 (en) * | 2004-10-27 | 2006-05-04 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Ignition device for a high-pressure discharge lamp and high-pressure discharge lamp with ignition device and operating method for a high-pressure discharge lamp |
| JP4910826B2 (en) * | 2007-03-28 | 2012-04-04 | Ｆｄｋ株式会社 | Winding parts |
| JP5459301B2 (en) * | 2011-12-19 | 2014-04-02 | 株式会社村田製作所 | High frequency transformer, high frequency component and communication terminal device |
| JP6423269B2 (en) * | 2014-12-26 | 2018-11-14 | 株式会社エス・エッチ・ティ | Common mode choke coil |
| JP2021093456A (en) * | 2019-12-11 | 2021-06-17 | 株式会社村田製作所 | Coil component |
| WO2023002671A1 (en) * | 2021-07-19 | 2023-01-26 | ソニーグループ株式会社 | Inductor device |
-
1993
- 1993-04-09 JP JP08298193A patent/JP3396908B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06295834A (en) | 1994-10-21 |
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