JPS5880817A - Choke coil - Google Patents
Choke coilInfo
- Publication number
- JPS5880817A JPS5880817A JP18001281A JP18001281A JPS5880817A JP S5880817 A JPS5880817 A JP S5880817A JP 18001281 A JP18001281 A JP 18001281A JP 18001281 A JP18001281 A JP 18001281A JP S5880817 A JPS5880817 A JP S5880817A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- magnetic path
- core
- magnetic core
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ノイズフィルタ等に用いられるチョークコイ
ルの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in choke coils used in noise filters and the like.
従来、電源ラインに挿入して、ノーマルモード。Conventionally, it is inserted into the power line and operates in normal mode.
コモンモード、両ノイズを除去するためのテ、−クコイ
ルとしては、電源ラインに通電される電源が大きいこと
によって大きな磁束が磁心な通過することになる為、飽
和磁束密度の大きい圧粉磁心が使用されてきた。A powder magnetic core with a high saturation magnetic flux density is used as a coil for eliminating common mode and both noises, since the power supplied to the power line is large and a large magnetic flux passes through the magnetic core. It has been.
しかしながら、圧粉磁心の透磁率μ′は、数百ＫＨｚ付
近より低下し始める。このため、低下の早いものでは、
５ＭＨｚ付近でノイズ減衰量は、その最大値の１になり
、低下の遅いものでも１０ＭＨｚ０
付近でｉに低下する。従って、これよりも更に高域で大
きいノイズ減衰効果を得るのは困難である。However, the magnetic permeability μ' of the powder magnetic core starts to decrease around several hundred KHz. For this reason, for items that decline quickly,
The amount of noise attenuation reaches its maximum value of 1 around 5 MHz, and even if it decreases slowly, it decreases to i around 10 MHz0. Therefore, it is difficult to obtain a large noise attenuation effect in higher frequencies.
本発明は、従来のかかる圧粉磁心使用テロ−クコイルの
技術的問題点を改善することを目的として、提供される
ものである。The present invention is provided for the purpose of improving the technical problems of the conventional terror coil using a powder magnetic core.
本発明は、圧粉磁心で形成する閉磁路の一部に。The present invention is applied to a part of a closed magnetic circuit formed by a powder magnetic core.
フェライトで形成する磁路な並列に設け、フェライト自
体の磁路は開磁路として、前記圧粉磁心とフェライトと
を一体的に巻回するコイルを装着したチョークコイルで
ある。The choke coil is equipped with a coil that integrally winds the powder magnetic core and the ferrite, with magnetic paths formed of ferrite being provided in parallel, and the magnetic path of the ferrite itself being an open magnetic path.
第１図に、実施例斜視図を示す。閉磁路を形成する圧粉
磁心１１に、フェライト磁心１２をそれ自体では飽和し
にくい開磁路となる様に並列に挿入し２巻線１３を施し
たものである。フェライト磁心１２には２巻線１３がは
ずれないように段差１４をつけた構造としである。この
場合、フェライト磁心１２は、数１０ＭＨｚ以上でも、
μ′が低下しないので、圧粉磁心だけでは得られない高
域での減衰効果を有するテ璽−クコイルが得られる。FIG. 1 shows a perspective view of the embodiment. A ferrite magnetic core 12 is inserted in parallel to a powder magnetic core 11 forming a closed magnetic path so as to form an open magnetic path that is difficult to saturate by itself, and two windings 13 are provided. The ferrite magnetic core 12 has a structure in which a step 14 is provided to prevent the second winding 13 from coming off. In this case, the ferrite magnetic core 12 can
Since .mu.' does not decrease, it is possible to obtain a tape coil that has a damping effect in high frequencies that cannot be obtained with a powder magnetic core alone.
第２図に、従来の圧粉磁心のみを用いたテ１ｉｔ−クコ
イルのノイズ減衰量の周波数依存性（曲線Ｂで示す）と
、一本発明によるもの（曲線Ａで示す）とを示しである
。第３図には、第２図のデータを得るために使用した測
定装置の回路図を示しである。FIG. 2 shows the frequency dependence of the noise attenuation of a conventional TIT coil using only a powder magnetic core (shown by curve B) and the one according to the present invention (shown by curve A). . FIG. 3 shows a circuit diagram of the measuring device used to obtain the data shown in FIG. 2.
第３図において、３１は被測定テ冒−クコイルであり、
３３はＺ８＝５０ρなる標準信号発生器３３０．３３１
，３３２，３３３は、高周波パス（ＡＣ１００■阻止）
用コンデンサ、３５は高周波真空管電圧計、３６は負荷
である。In FIG. 3, 31 is a test coil to be measured;
33 is a standard signal generator 330.331 where Z8=50ρ
, 332, 333 are high frequency paths (AC100 ■ blocking)
35 is a high frequency vacuum tube voltmeter, and 36 is a load.
本発明により、広帯域ノイズフィルターが得られる。The present invention provides a broadband noise filter.
【図面の簡単な説明】
第１図は、実施例斜視図、第２図は、ノイズ減。
表置の周波数依存性を示す図、第３図は、測定装置の回
路図である。
１１：圧粉磁心、１２：フェライト、１３：巻線。
代理人 梶原弘−′寸・
一！ｌ！
６
［：[Brief Description of the Drawings] Fig. 1 is a perspective view of the embodiment, and Fig. 2 shows noise reduction. FIG. 3, a diagram showing the frequency dependence of the surface, is a circuit diagram of the measuring device. 11: Powder magnetic core, 12: Ferrite, 13: Winding wire. Agent Hiroshi Kajiwara-'sun Ichi! l! 6 [:
Claims (1)
で形成する磁路を並列に挿入し、前記圧粉磁心とフェラ
イトとを一体的に巻回するコイルを装着したことを特徴
とするチョークコイル。 ２、 巻回するコイルがはずれなり）様（二機能する。 段差を付けたフェライトを使用したことを特徴とする特
許請求の範囲第１項記載のチョークコイル。[Claims] 1. Part of a closed magnetic path formed by a powder magnetic core (2. A coil in which a magnetic path formed by ferrite is inserted in parallel and the powder magnetic core and ferrite are integrally wound) 2. The choke coil according to claim 1, characterized in that a ferrite with a step is used. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18001281A JPS5880817A (en) | 1981-11-10 | 1981-11-10 | Choke coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18001281A JPS5880817A (en) | 1981-11-10 | 1981-11-10 | Choke coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5880817A true JPS5880817A (en) | 1983-05-16 |
Family
ID=16075907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18001281A Pending JPS5880817A (en) | 1981-11-10 | 1981-11-10 | Choke coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5880817A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61214507A (en) * | 1985-03-20 | 1986-09-24 | Osaka Denki Kk | Direct current reactor |
-
1981
- 1981-11-10 JP JP18001281A patent/JPS5880817A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61214507A (en) * | 1985-03-20 | 1986-09-24 | Osaka Denki Kk | Direct current reactor |
| JPH0573043B2 (en) * | 1985-03-20 | 1993-10-13 | Osaka Denki Co Ltd |
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