JPS61140620U - - Google Patents
Info
- Publication number
- JPS61140620U JPS61140620U JP2436985U JP2436985U JPS61140620U JP S61140620 U JPS61140620 U JP S61140620U JP 2436985 U JP2436985 U JP 2436985U JP 2436985 U JP2436985 U JP 2436985U JP S61140620 U JPS61140620 U JP S61140620U
- Authority
- JP
- Japan
- Prior art keywords
- pair
- filter circuit
- input
- inductors
- circuit according
- 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
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims 3
- 239000011324 bead Substances 0.000 claims 1
- 229910000859 α-Fe Inorganic materials 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Filters And Equalizers (AREA)
Description
第１図は本考案に係るフイルタ回路を組込んだ
機器の電気回路図、第２図は本考案に係るフイル
タ回路をスイツチング電源に組込んだ場合の周波
数―雑音端子電圧特性図、第３図は従来のフイル
タ回路を組込んだスイツチング電源の周波数―雑
音端子電圧特性図、第４図〜第６図は本考案に係
るフイルタ回路の要部となるインダクタの各実施
例における斜視図、第７図は本考案のフイルタ回
路をモジユール化した場合の電気回路図、第８図
は交流回路網、機器及び負荷等とアースとの間に
発生する浮遊容量及びそれによるノイズ電流につ
いて説明する図、第９図は浮遊容量に起因するノ
イズ電流低減のための従来の手段を示す図、第１
０図は同じく別の従来例における電気回路図であ
る。
６…導線、７…磁性体、Ｇ…アース端子、ＦＧ
…フレームグランド端子。
Fig. 1 is an electrical circuit diagram of a device incorporating the filter circuit according to the present invention, Fig. 2 is a frequency-noise terminal voltage characteristic diagram when the filter circuit according to the present invention is incorporated into a switching power supply, and Fig. 3 7 is a frequency-noise terminal voltage characteristic diagram of a switching power supply incorporating a conventional filter circuit, FIGS. The figure is an electric circuit diagram when the filter circuit of the present invention is modularized, Figure 8 is a diagram explaining the stray capacitance generated between the AC circuit network, equipment, loads, etc. and the ground, and the noise current caused by it. Figure 9 is a diagram showing conventional means for reducing noise current caused by stray capacitance.
FIG. 0 is an electric circuit diagram of another conventional example. 6... Conductor wire, 7... Magnetic material, G... Earth terminal, FG
...Frame ground terminal.
Claims (1)
導線に磁性体を挿着してなるインダクタを有るこ
とを特徴とするフイルタ回路。 (2) 前記インダクタは、直流抵抗値が２ｍΩ以
下であることを特徴とする実用新案登録請求の範
囲第１項に記載のフイルタ回路。 (3) 前記磁性体は、フエライトビーズで成るこ
とを特徴とする実用新案登録請求の範囲第１項ま
たは第２項に記載のフイルタ回路。 (4) 機器の入力ラインに直列に入る一対のイン
ダクタと、この一対のインダクタの入力側及び出
力側において前記入力ライン間に接続されたコン
デンサと、前記出力側に接続される少なくとも２
つのコンデンサの直列回路とを備え、前記２つの
コンデンキの接続点を前記フレームグランドに接
続したラインフイルタを備えることを特徴とする
実用新案登録請求の範囲第１項、第２項または第
３項に記載のフイルタ回路。 (5) 前記入力ラインに接続される一対の入力端
子と、前記機器に接続される一対の出力端子と、
フレームグランド端子と、アース端子とを備える
ことを特徴とする実用新案登録請求の範囲第４項
に記載のフイルタ回路。[Scope of Claim for Utility Model Registration] (1) A filter circuit characterized by having an inductor formed by inserting a magnetic material into a conductor connecting the frame ground of a device and the earth. (2) The filter circuit according to claim 1, wherein the inductor has a DC resistance value of 2 mΩ or less. (3) The filter circuit according to claim 1 or 2, wherein the magnetic material is made of ferrite beads. (4) A pair of inductors connected in series to the input line of the device, a capacitor connected between the input lines on the input side and the output side of the pair of inductors, and at least two capacitors connected to the output side of the pair of inductors.
A series circuit of two capacitors, and a line filter in which a connection point of the two condensers is connected to the frame ground, according to claim 1, 2, or 3 of the utility model registration claim. The filter circuit described. (5) a pair of input terminals connected to the input line; a pair of output terminals connected to the device;
The filter circuit according to claim 4, which is characterized by comprising a frame ground terminal and a ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2436985U JPS61140620U (en) | 1985-02-22 | 1985-02-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2436985U JPS61140620U (en) | 1985-02-22 | 1985-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61140620U true JPS61140620U (en) | 1986-08-30 |
Family
ID=30518454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2436985U Pending JPS61140620U (en) | 1985-02-22 | 1985-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61140620U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179015A (en) * | 1988-12-28 | 1990-07-12 | Matsushita Electric Ind Co Ltd | Ac line filter |
| JP2004504798A (en) * | 2000-07-13 | 2004-02-12 | エプコス アクチエンゲゼルシャフト | Power filter |
-
1985
- 1985-02-22 JP JP2436985U patent/JPS61140620U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179015A (en) * | 1988-12-28 | 1990-07-12 | Matsushita Electric Ind Co Ltd | Ac line filter |
| JP2004504798A (en) * | 2000-07-13 | 2004-02-12 | エプコス アクチエンゲゼルシャフト | Power filter |
| JP4681207B2 (en) * | 2000-07-13 | 2011-05-11 | エプコス アクチエンゲゼルシャフト | Power supply filter |
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