JPS5881321A - Noise filter - Google Patents

Noise filter

Info

Publication number
JPS5881321A
JPS5881321A JP18002081A JP18002081A JPS5881321A JP S5881321 A JPS5881321 A JP S5881321A JP 18002081 A JP18002081 A JP 18002081A JP 18002081 A JP18002081 A JP 18002081A JP S5881321 A JPS5881321 A JP S5881321A
Authority
JP
Japan
Prior art keywords
legs
windings
noise prevention
core
common mode
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
Application number
JP18002081A
Other languages
Japanese (ja)
Inventor
Susumu Danbara
壇原　奨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proterial Ltd
Original Assignee
Nippon Ferrite Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Ferrite Ltd filed Critical Nippon Ferrite Ltd
Priority to JP18002081A priority Critical patent/JPS5881321A/en
Publication of JPS5881321A publication Critical patent/JPS5881321A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H1/0007—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network of radio frequency interference filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/42—Balance/unbalance networks
    • H03H7/425—Balance-balance networks
    • H03H7/427—Common-mode filters

Landscapes

  • Filters And Equalizers (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To reduce the size of a device and to decrease the number of parts by providing windings for common mode noise prevention to respective outside legs of an E-E core, and providing inside legs with windings for balancing noise prevention with a magnetic gap between. CONSTITUTION:A spacer 35 for preventing an inside leg part from being saturated magnetically is sandwiched between the abutting inside legs of the E-E core consisting of E cores 31 and 32 abutting on each other, and outside legs are provided with windings L'1 and L'2 for common mode noise prevention; and the inside legs are provided with the spacer 35 between them and they are provided with windings L'3 and L'4 for balanced noise prevention.

Description

【発明の詳細な説明】 本発明は、フェライト等のコアからなる閉磁路部分と、
開磁路部分とを含む電源ラインノイズフィルタ等の改良
に関するものである。[Detailed Description of the Invention] The present invention provides a closed magnetic circuit portion made of a core of ferrite or the like;
This invention relates to improvements in power line noise filters and the like that include open magnetic path portions.

電源ラインに流れる交流電流による磁束が相殺される方
向に一対の巻線を閉磁路フェライトコアに施した電源ラ
インノイズフィルタ用コモンモートチ嘗−クコイルは良
く知られている。ノイズフィルターとしては、このコモ
ンモートチ言−りと共に、ノーマルモード用インダクタ
ンス素子２個を含むものが一般的である。Common motor check coils for power line noise filters are well known, in which a pair of windings are applied to a closed magnetic circuit ferrite core in a direction in which magnetic flux due to alternating current flowing through the power line is canceled out. A noise filter generally includes two normal mode inductance elements in addition to this common mode filter.

従来のノイズフィルターの一例を第１図に示しである。An example of a conventional noise filter is shown in FIG.

第１図において、Ｐ、Ｎは、交流電源に接続し。In FIG. 1, P and N are connected to an AC power source.

Ｐ′、　Ｎ′は、負荷へ接続する。矢印ａの方向に電源
が流れる場合を考えると、コモンモードチョークコイル
１には、ａ′の方向の磁束が発生する。チョークコイル
２１．２２には、矢印ａ″、ａ″の方向に磁束が発生す
る。第２図は、第１図の等価回路である。P' and N' are connected to the load. Considering the case where power flows in the direction of arrow a, a magnetic flux is generated in the common mode choke coil 1 in the direction of a'. Magnetic flux is generated in the choke coils 21 and 22 in the directions of arrows a'' and a''. FIG. 2 is an equivalent circuit of FIG. 1.

しかして１本発明は、前述の如き従来のコモンモートチ
雷−クコイル１個と、テ冒−クコイル２個とを、１つの
ＥＥ）ランス等に組み込んで装置の小型化９部品点数の
低減を目的とするものである。Therefore, the present invention aims to reduce the number of components by incorporating one conventional common motor coil and two electric coils into one EE) lance, etc. as described above. It is something to do.

第３図に１本発明の実施例を示しである。第３図におい
て、Ｅコア３１と３２とをつき合わせ。FIG. 3 shows an embodiment of the present invention. In FIG. 3, E cores 31 and 32 are brought together.

中足つき合わせ部分には、スペーサ３５を挾む。A spacer 35 is placed between the middle legs.

このスペーサ３５は、磁束ｆｌ！ｓ、　１ｍが中足部分
を通過しても、中足部分が磁束飽和をしない様に作用す
る。This spacer 35 has a magnetic flux fl! s, 1m passes through the middle leg, it acts so that the middle leg does not become saturated with magnetic flux.

通常ｇ　Ｌ’ｌ、　Ｌ−は、数マイクロヘンリー、Ｌ鷲
Ｌ’１は、数ミリヘンリーである。Normally g L'l, L- is several microhenries, and L'1 is several millihenries.

第３図における本ノイズフィルターの磁束の発生と動作
の説明を以下に述べる。The generation of magnetic flux and the operation of the present noise filter in FIG. 3 will be explained below.

交流電源によって、　Ｌ’！、　Ｌ’ｓに発生する磁束
〆１゜グ２は互いに打ち消し合い、コアは飽和しないの
でＬ’ｓ、　Ｌ’ｓはコモンモードノイズ防止の役目を
果す。By AC power supply, L'! The magnetic fluxes generated in L's and L's cancel each other out and the core is not saturated, so L's and L's play the role of preventing common mode noise.

一方、中足部コイルＬ’Ｌ　Ｌ’４により発生する交流
磁束ｓｓ、ｓ、は、同一方向に発生することになるので
。On the other hand, the alternating current magnetic fluxes ss and s generated by the midfoot coil L'L L'4 are generated in the same direction.

コアが飽和する傾向を有する。そこでＬ’ｓ、　Ｌ’４
により発生する交流磁束の通過する沖足の磁路に、スペ
ーサ３５により空隙を設け、磁気飽和を防止している。The core has a tendency to saturate. So L's, L'4
A gap is provided by a spacer 35 in the magnetic path of Okiashi, through which the alternating current magnetic flux generated by the magnetic flux passes, to prevent magnetic saturation.

従って１本ノイズフィルターによれば−。Therefore, according to one noise filter -.

一対のＥ−Ｂ磁心により、コモン、ノーマル両モードの
ノイズに対して効果を得る。A pair of E-B magnetic cores is effective against both common and normal mode noise.

【図面の簡単な説明】 第１図は、従来のノイズフィルターを示す図。 第２図は、第１図の等価磁気回路図、第３図は。 実施例を示す図である。 １：コモンモードテ璽−クコイル、２１：チョークコイ
ル、３１．３２：Ｂ−コア、３５ニスペーサ。 代理人　梶原弘二弾 マｇBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a conventional noise filter. Fig. 2 is an equivalent magnetic circuit diagram of Fig. 1, and Fig. 3 is an equivalent magnetic circuit diagram of Fig. 1. It is a figure showing an example. 1: Common mode choke coil, 21: Choke coil, 31.32: B-core, 35 spacer. Agent Koji Kajiwara Mag

Claims (1)

【特許請求の範囲】[Claims] 中足に磁気空隙を形成したＥ−Ｅコアの外足の各々には
、コモンモードノイズ防止用巻線を施こし、中足には磁
気空隙を挾んで、各々、平衡雑音防止用巻線を施こした
ことを特徴とするノイズフィルタ。A common mode noise prevention winding is applied to each of the outer legs of the E-E core with a magnetic gap formed in the middle leg, and a balanced noise prevention winding is applied to each of the middle legs with a magnetic gap in between. A noise filter that is characterized by the following features:
JP18002081A 1981-11-10 1981-11-10 Noise filter Pending JPS5881321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18002081A JPS5881321A (en) 1981-11-10 1981-11-10 Noise filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18002081A JPS5881321A (en) 1981-11-10 1981-11-10 Noise filter

Publications (1)

Publication Number Publication Date
JPS5881321A true JPS5881321A (en) 1983-05-16

Family

ID=16076050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18002081A Pending JPS5881321A (en) 1981-11-10 1981-11-10 Noise filter

Country Status (1)

Country Link
JP (1) JPS5881321A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62191221U (en) * 1986-05-23 1987-12-05
EP0509059A1 (en) * 1990-01-03 1992-10-21 Integrated Power Components Integrated electromagnetic interference filter
WO1994010749A1 (en) * 1992-10-30 1994-05-11 Motorola Lighting Inc. Integrated emi/rfi filter magnetics
US5319343A (en) * 1990-08-21 1994-06-07 Powercube Corporation Integrated magnetic inductor having series and common mode windings
US5321373A (en) * 1992-04-03 1994-06-14 Digital Equipment Corporation Combined differential-mode common-mode noise filter
US6617814B1 (en) 2001-04-11 2003-09-09 Rockwell Automation Technologies, Inc. Integrated DC link choke and method for suppressing common-mode voltage in a motor drive
US6987372B1 (en) 2001-04-11 2006-01-17 Rockwell Automation Technologies, Inc. Integrated DC link choke and method for suppressing common-mode voltage in a motor drive
US7132812B1 (en) 2001-04-11 2006-11-07 Rockwell Automation Technologies, Inc. Integrated DC link choke and method for suppressing common-mode voltage in a motor drive
WO2008097758A1 (en) * 2007-02-09 2008-08-14 Bose Corporation Hybrid filter for audio switching amplifier
US7432793B2 (en) 2005-12-19 2008-10-07 Bose Corporation Amplifier output filter having planar inductor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5422744A (en) * 1977-07-22 1979-02-20 Tohoku Metal Ind Ltd Noise preventive filter choke coil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5422744A (en) * 1977-07-22 1979-02-20 Tohoku Metal Ind Ltd Noise preventive filter choke coil

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62191221U (en) * 1986-05-23 1987-12-05
EP0509059A1 (en) * 1990-01-03 1992-10-21 Integrated Power Components Integrated electromagnetic interference filter
US5319343A (en) * 1990-08-21 1994-06-07 Powercube Corporation Integrated magnetic inductor having series and common mode windings
US5321373A (en) * 1992-04-03 1994-06-14 Digital Equipment Corporation Combined differential-mode common-mode noise filter
WO1994010749A1 (en) * 1992-10-30 1994-05-11 Motorola Lighting Inc. Integrated emi/rfi filter magnetics
US5313176A (en) * 1992-10-30 1994-05-17 Motorola Lighting, Inc. Integrated common mode and differential mode inductor device
CN1036957C (en) * 1992-10-30 1998-01-07 摩托罗拉照明公司 Integrated emi/rfifilter magnetics
US6617814B1 (en) 2001-04-11 2003-09-09 Rockwell Automation Technologies, Inc. Integrated DC link choke and method for suppressing common-mode voltage in a motor drive
US6987372B1 (en) 2001-04-11 2006-01-17 Rockwell Automation Technologies, Inc. Integrated DC link choke and method for suppressing common-mode voltage in a motor drive
US7132812B1 (en) 2001-04-11 2006-11-07 Rockwell Automation Technologies, Inc. Integrated DC link choke and method for suppressing common-mode voltage in a motor drive
US7432793B2 (en) 2005-12-19 2008-10-07 Bose Corporation Amplifier output filter having planar inductor
WO2008097758A1 (en) * 2007-02-09 2008-08-14 Bose Corporation Hybrid filter for audio switching amplifier

Similar Documents

Publication Publication Date Title
US5731666A (en) Integrated-magnetic filter having a lossy shunt
JPS5881321A (en) Noise filter
US3761797A (en) Electrical filters
JPH0766041A (en) Inductor
JPH0475643B2 (en)
JPH0520311U (en) Common mode chiyoke coil
JPH10163046A (en) Noise filter
JPH08181024A (en) Choke coil for suppressing harmonic current
JP2585303Y2 (en) Noise prevention choke coil
JP2567360Y2 (en) Noise prevention choke coil
JP2729848B2 (en) AC reactor
EP0387841B1 (en) Noise-damping bobbin arrangement for damping symmetric and asymmetric noise currents
JPH03227506A (en) Normal mode choke coil
JP2580367Y2 (en) Choke coil for noise filter
JPS63228605A (en) Inductance element
JP3305997B2 (en) Magnetically biased induction magnet
JPH0533065Y2 (en)
JP3528741B2 (en) Coil parts
JPS584912A (en) Electromagnetic guiding device
JPS59182514A (en) Magnetic core for choke coil
JP2567381Y2 (en) Noise prevention choke coil
JPH0414906Y2 (en)
JP2601901Y2 (en) High frequency choke coil
JPS5958811A (en) High-frequency leakage transformer
JPH03141623A (en) Electromagnetic device