JP2001093737A - Choke coil - Google Patents
Choke coilInfo
- Publication number
- JP2001093737A JP2001093737A JP27080399A JP27080399A JP2001093737A JP 2001093737 A JP2001093737 A JP 2001093737A JP 27080399 A JP27080399 A JP 27080399A JP 27080399 A JP27080399 A JP 27080399A JP 2001093737 A JP2001093737 A JP 2001093737A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic core
- core
- magnetic
- bobbin
- 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.)
- Granted
Links
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、各種民生機器等に
使用するチョークコイルに関するものである。The present invention relates to a choke coil used for various consumer appliances and the like.
【０００２】[0002]
【従来の技術】以下、従来のチョークコイルについて図
面を参照しながら説明する。2. Description of the Related Art A conventional choke coil will be described below with reference to the drawings.
【０００３】図１１は従来のチョークコイルの斜視図、
図１２は磁気シールド板装着前の同チョークコイルの分
解斜視図、図１３は同チョークコイルの正面断面図であ
る。FIG. 11 is a perspective view of a conventional choke coil.
FIG. 12 is an exploded perspective view of the choke coil before mounting the magnetic shield plate, and FIG. 13 is a front sectional view of the choke coil.
【０００４】図１１〜図１３において、従来のチョーク
コイルは、貫通孔を有したボビン１と、このボビン１に
巻回した巻線２と、ボビン１の貫通孔に挿入した鉄芯用
電磁鋼板３を複数枚積層してなる積層鉄芯４とを備えて
いる。Referring to FIGS. 11 to 13, a conventional choke coil includes a bobbin 1 having a through hole, a winding 2 wound around the bobbin 1, and an electromagnetic steel sheet for an iron core inserted into the through hole of the bobbin 1. 3 is provided.
【０００５】積層鉄芯４は、２つのＵ字形状磁芯５を組
み合わせてロの字状に形成しており、互いの中磁脚６を
ボビン１の貫通孔内に配置するとともに、互いの中磁脚
６は接触しないようにギャップ（Ｇ）を設け、ギャップ
スペーサ７を挟んでいる。[0005] The laminated iron core 4 is formed in a square shape by combining two U-shaped magnetic cores 5, and the middle magnetic legs 6 are arranged in the through holes of the bobbin 1, and each other. The middle magnetic leg 6 is provided with a gap (G) so as not to contact, and the gap spacer 7 is interposed therebetween.
【０００６】そして、漏洩磁束が外部へ漏れるのを遮断
するために、厚さが０．１〜０．５ｍｍの磁気シールド
板８を１〜３重に外周部に巻いてある。[0006] In order to prevent the leakage magnetic flux from leaking outside, a magnetic shield plate 8 having a thickness of 0.1 to 0.5 mm is wound around the outer periphery in one to three layers.
【０００７】積層鉄芯の周りを絶縁用テープで被覆し、
固定している。[0007] The periphery of the laminated iron core is covered with an insulating tape,
It is fixed.
【０００８】[0008]
【発明が解決しようとする課題】上記従来の構成では、
積層鉄芯４の鉄芯用電磁鋼板３は、２つのＵ字形状磁芯
５を組み合わせた際、互いの中磁脚６が接触しないよう
にギャップスペーサ７を挟んでギャップ（Ｇ）を維持し
ているが、ギャップ（Ｇ）の距離は、ギャップスペーサ
７の厚みで決まるため、ギャップスペーサ７の厚みのバ
ラツキにより、ギャップ（Ｇ）の距離が一定せず、２つ
のＵ字形状磁芯５の組み合わせの位置が微妙にずれて、
インダクタンス値にバラツキが生じ、信頼性の向上が図
れなくなるとともに、ギャップ（Ｇ）から漏れ磁束が発
生しやすくなり、漏れ磁束の遮断にも悪影響を及ぼすと
いう問題点を有していた。In the above-mentioned conventional configuration,
When the two U-shaped magnetic cores 5 are combined, the magnetic steel sheet 3 for the iron core of the laminated iron core 4 maintains the gap (G) with the gap spacer 7 interposed therebetween so that the middle magnetic legs 6 do not contact each other. However, since the distance of the gap (G) is determined by the thickness of the gap spacer 7, the distance of the gap (G) is not constant due to the variation of the thickness of the gap spacer 7, and the distance between the two U-shaped magnetic cores 5 is small. The position of the combination is slightly shifted,
There has been a problem in that the inductance value varies, the reliability cannot be improved, and the leakage magnetic flux is easily generated from the gap (G), which has a bad influence on the interruption of the leakage magnetic flux.
【０００９】本発明は上記問題点を解決するもので、分
割磁芯を組み合わせて形成した鉄芯用鋼板において、分
割磁芯の位置を的確に固定するとともに、中磁脚のギャ
ップの距離を一定にすることにより、インダクタンス値
のバラツキを抑制して信頼性の向上を図るとともに、ギ
ャップからの漏れ磁束の発生も抑制して漏れ磁束の遮断
の向上を図ったチョークコイルを提供することを目的と
している。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems. In a steel sheet for an iron core formed by combining divided magnetic cores, the position of the divided magnetic core is accurately fixed, and the distance of the gap between the middle magnetic legs is fixed. The purpose of the present invention is to provide a choke coil that suppresses the variation of the inductance value to improve the reliability by suppressing the variation of the inductance value, and also suppresses the generation of the leakage magnetic flux from the gap to improve the interruption of the leakage magnetic flux. I have.
【００１０】[0010]
【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、貫通孔を有したボビンと、前記ボビンに巻
回した巻線と、前記ボビンの貫通孔に挿入した鉄芯用鋼
板を複数枚積層してなる積層鉄芯とを備え、前記鉄芯用
鋼板は前記ボビンの貫通孔内に配置する中磁脚と前記中
磁脚に連接し貫通孔外に配置する背磁脚とを有した中央
磁芯と、前記ボビンの貫通孔外に配置する外磁脚を有し
た外部磁芯とを組み合わせて形成するとともに、前記中
央磁芯は中磁脚で分割された２つの分割中央磁芯をギャ
ップを介して互いに向き合わせて形成しており、前記中
央磁芯および前記外部磁芯に固定手段を設け、前記中央
磁芯と前記外部磁芯とを組み合わせて互いに位置固定し
た構成である。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a bobbin having a through hole, a winding wound around the bobbin, and a steel sheet for an iron core inserted into the through hole of the bobbin. And a laminated magnetic core formed by laminating a plurality of the magnetic cores, wherein the iron core steel plate is provided with a middle magnetic leg arranged in the through hole of the bobbin and a back magnetic leg connected to the middle magnetic leg and arranged outside the through hole. And a central magnetic core having an external magnetic leg disposed outside the through hole of the bobbin, and the central magnetic core is divided into two divided centers divided by a medium magnetic leg. Magnetic cores are formed facing each other with a gap therebetween, fixing means are provided on the central magnetic core and the external magnetic core, and the central magnetic core and the external magnetic core are combined and fixed in position with each other. is there.
【００１１】上記構成により、中央磁芯および外部磁芯
に固定手段を設け、中央磁芯と外部磁芯とを組み合わせ
て互いに位置固定するので、中央磁芯の位置を外部磁芯
により的確に固定できるとともに、中央磁芯の中磁脚の
ギャップの距離も的確に一定にすることができ、インダ
クタンス値のバラツキを抑制して信頼性の向上を図れる
とともに、ギャップからの漏れ磁束の発生も抑制して漏
れ磁束の遮断の向上を図ることもできる。According to the above configuration, fixing means are provided for the central magnetic core and the external magnetic core, and the central magnetic core and the external magnetic core are combined and fixed to each other, so that the position of the central magnetic core is accurately fixed to the external magnetic core. The distance between the center magnetic core and the gap between the center magnetic legs can be accurately maintained at a constant value, suppressing variations in the inductance value, improving reliability, and suppressing generation of magnetic flux leakage from the gap. Thus, it is possible to improve the interruption of the leakage magnetic flux.
【００１２】特に、漏れ磁束は、外部磁芯にも吸収させ
ることができ、漏れ磁束の遮断の向上を的確に図ること
ができる。In particular, the leakage magnetic flux can be absorbed by the external magnetic core, and the shielding of the leakage magnetic flux can be accurately improved.
【００１３】[0013]
【発明の実施の形態】本発明の請求項１記載の発明は、
貫通孔を有したボビンと、前記ボビンに巻回した巻線
と、前記ボビンの貫通孔に挿入した鉄芯用鋼板を複数枚
積層してなる積層鉄芯とを備え、前記鉄芯用鋼板は前記
ボビンの貫通孔内に配置する中磁脚と前記中磁脚に連接
し貫通孔外に配置する背磁脚とを有した中央磁芯と、前
記ボビンの貫通孔外に配置する外磁脚を有した外部磁芯
とを組み合わせて形成するとともに、前記中央磁芯は中
磁脚で分割された２つの分割中央磁芯をギャップを介し
て互いに向き合わせて形成しており、前記中央磁芯およ
び前記外部磁芯に固定手段を設け、前記中央磁芯と前記
外部磁芯とを組み合わせて位置固定した構成である。BEST MODE FOR CARRYING OUT THE INVENTION
A bobbin having a through-hole, a winding wound around the bobbin, and a laminated iron core formed by laminating a plurality of steel sheets for an iron core inserted into the through-hole of the bobbin, the steel sheet for an iron core includes: A center magnetic core having a middle magnetic leg disposed in the through hole of the bobbin and a back magnetic leg connected to the middle magnetic leg and disposed outside the through hole; and an outer magnetic leg disposed outside the through hole of the bobbin. The central magnetic core is formed by combining two divided central magnetic cores divided by middle magnetic legs so as to face each other via a gap. Further, a fixing means is provided on the external magnetic core, and the position is fixed by combining the central magnetic core and the external magnetic core.
【００１４】上記構成により、中央磁芯および外部磁芯
に固定手段を設け、中央磁芯と外部磁芯とを組み合わせ
て互いに位置固定するので、中央磁芯の位置を外部磁芯
により的確に固定できるとともに、中央磁芯の中磁脚の
ギャップの距離も的確に一定にすることができ、インダ
クタンス値のバラツキを抑制して信頼性の向上が図れる
とともに、ギャップからの漏れ磁束の発生も抑制して漏
れ磁束の遮断の向上を図ることもできる。According to the above configuration, fixing means are provided for the central magnetic core and the external magnetic core, and the central magnetic core and the external magnetic core are combined and fixed to each other, so that the position of the central magnetic core is accurately fixed to the external magnetic core. The distance between the gaps of the middle magnetic legs of the center core can be accurately maintained at a constant value, suppressing variations in the inductance value, improving reliability, and suppressing the generation of magnetic flux leakage from the gap. Thus, it is possible to improve the interruption of the leakage magnetic flux.
【００１５】特に、漏れ磁束は、外部磁芯にも吸収させ
ることができ、漏れ磁束の遮断の向上を的確に図ること
ができる。In particular, the leakage magnetic flux can also be absorbed by the external magnetic core, and the improvement of the interruption of the leakage magnetic flux can be accurately achieved.
【００１６】本発明の請求項２記載の発明は、請求項１
記載の発明において、分割中央磁芯は櫛形状にするとと
もに、外部磁芯はＵ字形状にした構成である。The second aspect of the present invention is the first aspect of the present invention.
In the described invention, the split central magnetic core has a comb shape and the external magnetic core has a U-shape.
【００１７】上記構成により、中央磁芯の中磁脚のギャ
ップは、簡単に、外部磁芯により位置決めされ固定され
るので、ギャップの距離のバラツキが抑制され、信頼性
を向上できる。According to the above configuration, the gap of the middle magnetic leg of the central magnetic core is easily positioned and fixed by the external magnetic core, so that the variation in the distance of the gap can be suppressed and the reliability can be improved.
【００１８】本発明の請求項３記載の発明は、請求項１
記載の発明において、固定手段は、分割中央磁芯の背磁
脚側面および前記背磁脚側面に対向する外部磁芯の対向
側面に設けた構成である。The third aspect of the present invention provides the first aspect.
In the invention described above, the fixing means is provided on the back magnetic leg side surface of the divided central magnetic core and on the opposing side surface of the external magnetic core facing the back magnetic leg side surface.
【００１９】上記構成により、鉄芯用鋼板は、中央磁芯
および外部磁芯とを組み合わせやすくなるとともに、上
面や下面ではなく側面で組み合わせるので厚みも厚くな
らない。According to the above configuration, the steel sheet for an iron core can be easily combined with the central magnetic core and the external magnetic core, and the thickness is not increased because the steel core is combined on the side surface instead of the upper surface or the lower surface.
【００２０】本発明の請求項４記載の発明は、請求項３
記載の発明において、分割中央磁芯および外部磁芯はＵ
字形状にするとともに、前記分割中央磁芯の背磁脚側面
幅よりも前記外部磁芯の対向側面幅を小さくした構成で
ある。The invention according to claim 4 of the present invention is the invention according to claim 3.
In the described invention, the split center core and the outer core are U
And the width of the outer magnetic core facing side is smaller than the width of the back magnetic leg side of the divided central magnetic core.
【００２１】上記構成により、通常の動作において、中
央磁芯に流れる磁束が、外部磁芯に流れてしまうのを抑
制し、磁束効率の低下を防止することができるととも
に、外部磁芯を中央磁芯に組み合わせる際には、ボビン
から距離が離れているので、ボビンに外傷を与えにく
い。According to the above configuration, it is possible to prevent the magnetic flux flowing through the central magnetic core from flowing to the external magnetic core in normal operation, thereby preventing a reduction in the magnetic flux efficiency and preventing the external magnetic core from moving to the central magnetic core. When combined with the core, since the distance from the bobbin is large, the bobbin is not easily damaged.
【００２２】本発明の請求項５記載の発明は、請求項３
記載の発明において、固定手段は、分割中央磁芯の背磁
脚側面の中心線よりも外側に配置した構成である。The invention described in claim 5 of the present invention is the same as that in claim 3.
In the described invention, the fixing means is arranged outside the center line of the side surface of the back magnetic leg of the divided central magnetic core.
【００２３】上記構成により、分割中央磁芯の背磁脚に
磁束が流れる際、内側ほど磁束密度が高く、外側ほど磁
束密度が低くなるが、固定手段は外側に配置しているの
で、磁束抵抗を低減し、磁束効率の低下を防止すること
ができる。According to the above configuration, when the magnetic flux flows through the back magnetic leg of the divided central magnetic core, the magnetic flux density is higher on the inner side and lower on the outer side. However, since the fixing means is arranged on the outer side, the magnetic flux resistance is reduced. And the magnetic flux efficiency can be prevented from lowering.
【００２４】本発明の請求項６記載の発明は、請求項３
記載の発明において、固定手段は、分割中央磁芯に嵌合
溝を設けるとともに、前記嵌合溝に嵌合する嵌合突起を
外部磁芯に設けた構成である。The invention according to claim 6 of the present invention is the invention according to claim 3.
In the invention described above, the fixing means has a configuration in which a fitting groove is provided in the divided central magnetic core, and a fitting protrusion that fits in the fitting groove is provided in the external magnetic core.
【００２５】上記構成により、中央磁芯と外部磁芯との
位置固定を確実にすることができる。According to the above configuration, it is possible to reliably fix the position of the central magnetic core and the external magnetic core.
【００２６】本発明の請求項７記載の発明は、請求項３
記載の発明において、固定手段は、外部磁芯に嵌合溝を
設けるとともに、前記嵌合溝に嵌合する嵌合突起を分割
中央磁芯に設けた構成である。The invention according to claim 7 of the present invention is the invention according to claim 3.
In the invention described above, the fixing means has a configuration in which a fitting groove is provided in the external magnetic core, and a fitting protrusion that fits in the fitting groove is provided in the divided central magnetic core.
【００２７】上記構成により、中央磁芯と外部磁芯との
位置固定を確実にすることができる。According to the above configuration, it is possible to reliably fix the position of the center core and the outer core.
【００２８】本発明の請求項８記載の発明は、請求項６
または請求項７の発明において、嵌合突起および嵌合溝
は、互いに円形状にした構成である。The invention according to claim 8 of the present invention is directed to claim 6
Alternatively, in the invention according to claim 7, the fitting projection and the fitting groove are configured to be circular to each other.
【００２９】上記構成により、中央磁芯と外部磁芯と
は、嵌合突起および嵌合溝を嵌合させる際、圧入性が良
く、また、抜けにくいので固定強度を向上させることも
できる。According to the above configuration, the center magnetic core and the outer magnetic core have good press-fitting property when they are fitted with the fitting protrusions and the fitting grooves, and are hard to come off, so that the fixing strength can be improved.
【００３０】（実施の形態）以下、本発明の一実施の形
態におけるチョークコイルについて図面を参照しながら
説明する。(Embodiment) A choke coil according to an embodiment of the present invention will be described below with reference to the drawings.
【００３１】図１は本発明の一実施の形態におけるチョ
ークコイルの正面断面図、図２は同チョークコイルの分
解斜視図、図３は同チョークコイルの斜視図、図４は同
チョークコイルの鉄芯用電磁鋼板の平面図、図５は同チ
ョークコイルの鉄芯用電磁鋼板の突起部近傍（Ａ）の拡
大平面図、図６は同チョークコイルの鉄芯用電磁鋼板の
組み合わせ時を示す平面図である。FIG. 1 is a front sectional view of a choke coil according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the choke coil, FIG. 3 is a perspective view of the choke coil, and FIG. FIG. 5 is an enlarged plan view of the vicinity of a protrusion (A) of the magnetic steel sheet for an iron core of the choke coil, and FIG. 6 is a plan view showing a combination of the magnetic steel sheets for an iron core of the choke coil. FIG.
【００３２】図１〜図６において、本発明の一実施の形
態におけるチョークコイルは、貫通孔を有したボビン１
１と、このボビン１１に巻回した巻線１２と、ボビン１
１の貫通孔に挿入した鉄芯用電磁鋼板１３を複数枚積層
してなる積層鉄芯１４とを備えている。1 to 6, a choke coil according to an embodiment of the present invention is a bobbin 1 having a through hole.
1, the winding 12 wound around the bobbin 11, and the bobbin 1
And a laminated iron core 14 formed by laminating a plurality of electromagnetic steel sheets 13 for iron core inserted into one through hole.
【００３３】また、積層鉄芯１４はボビン１１の貫通孔
内に配置する中磁脚１５とこの中磁脚１５に連接し貫通
孔外に配置する背磁脚１６とを有した中央磁芯１７と、
ボビン１１の貫通孔外に配置する外磁脚１８を有した外
部磁芯１９とを組み合わせて形成するとともに、中央磁
芯１７は中磁脚１５で分割された２つの分割中央磁芯２
０をギャップ（Ｇ）を介して互いに向き合わせて形成し
ている。The laminated iron core 14 has a central magnetic core 17 having a middle magnetic leg 15 arranged in the through hole of the bobbin 11 and a back magnetic leg 16 connected to the middle magnetic leg 15 and arranged outside the through hole. When,
An external magnetic core 19 having an external magnetic leg 18 disposed outside the through hole of the bobbin 11 is formed in combination with the central magnetic core 17.
0 are formed to face each other via a gap (G).
【００３４】さらに、中央磁芯１７および外部磁芯１９
に固定手段を設け、中央磁芯１７と外部磁芯１９とを組
み合わせて位置固定するとともに、中央磁芯１７の背磁
脚１６と外部磁芯１９の外磁脚１８とにより閉磁路を形
成している。Further, the center core 17 and the outer core 19
The center magnetic core 17 and the external magnetic core 19 are combined to fix the position, and a closed magnetic path is formed by the back magnetic leg 16 of the central magnetic core 17 and the external magnetic leg 18 of the external magnetic core 19. ing.
【００３５】このとき、分割中央磁芯２０は櫛形状の一
つであるＵ字形状にするとともに、外部磁芯１９もＵ字
形状にしており、外部磁芯１９の対向側面幅（Ｗ）を分
割中央磁芯２０の背磁脚側面幅（Ｔ）よりも小さくして
いる。At this time, the divided central magnetic core 20 is U-shaped, which is one of the comb shapes, and the external magnetic core 19 is also U-shaped, so that the opposing side width (W) of the external magnetic core 19 is reduced. The width of the back magnetic leg side surface (T) of the divided central magnetic core 20 is smaller.
【００３６】そして、固定手段としては、分割中央磁芯
２０の背磁脚側面２１に嵌合溝２２を設けるとともに、
この嵌合溝２２に嵌合する嵌合突起２３を分割中央磁芯
２０の背磁脚側面２１に対向する外部磁芯１９の対向側
面２４に設けた手段としている。As the fixing means, a fitting groove 22 is provided on the back magnetic leg side surface 21 of the divided central magnetic core 20,
A fitting projection 23 fitted in the fitting groove 22 is provided on the opposed side surface 24 of the external magnetic core 19 facing the back magnetic leg side surface 21 of the divided central magnetic core 20.
【００３７】さらに、嵌合突起２３および嵌合溝２２
は、その形状を互いに円形状にするとともに、分割中央
磁芯２０の背磁脚側面２１の中心線（Ｏ）よりも外側に
配置した構成である。Further, the fitting protrusion 23 and the fitting groove 22
Is a configuration in which the shapes are circular with respect to each other and arranged outside the center line (O) of the back magnetic leg side surface 21 of the divided central magnetic core 20.
【００３８】上記構成のチョークコイルについて、以下
その動作を説明する。The operation of the choke coil having the above configuration will be described below.
【００３９】鉄芯用電磁鋼板１３は、中央磁芯１７およ
び外部磁芯１９に固定手段を設け、中央磁芯１７と外部
磁芯１９とを組み合わせて位置固定するとともに、中央
磁芯１７の背磁脚１６と外部磁芯１９の外磁脚１８とに
より閉磁路を形成して、積層鉄芯１４を形成するととも
に、中央磁芯１７の中磁脚１５のギャップ（Ｇ）は、外
部磁芯１９により機械的に位置決め固定されるので、機
械的ストレスや熱・吸湿等の環境ストレスを受けてもギ
ャップ（Ｇ）にの距離のバラツキが抑制され、インダク
タンス値のバラツキも少なくなるとともに、うなり音も
小さくなり、かつ、ギャップ（Ｇ）や巻線１２からの漏
れ磁束も、外磁脚１８に流れ込むので漏れ磁束も抑える
ことができる。The magnetic steel sheet 13 for an iron core is provided with fixing means for the central magnetic core 17 and the external magnetic core 19, and is fixed in position by combining the central magnetic core 17 and the external magnetic core 19. A closed magnetic path is formed by the magnetic leg 16 and the outer magnetic leg 18 of the outer magnetic core 19 to form the laminated iron core 14, and the gap (G) of the middle magnetic leg 15 of the central magnetic core 17 is equal to the external magnetic core Since the positioning and fixing are performed mechanically by the step 19, the variation in the distance to the gap (G) is suppressed even when subjected to environmental stress such as mechanical stress or heat or moisture absorption, and the variation in the inductance value is reduced and the beat noise is reduced. And the magnetic flux leaking from the gap (G) and the winding 12 also flows into the outer magnetic legs 18, so that the magnetic flux leaking can be suppressed.
【００４０】特に、漏れ磁束を遮断する際に、磁気シー
ルド板等で被覆しテープで固定するといったことが不必
要なので、製造バラツキが少なく、生産性を向上させる
とともに、うなり音を低減する際に、ギャップ（Ｇ）に
接着剤を塗布しても、中央磁芯１７は外部磁芯１９によ
り機械的に固定されているので、接着剤の膨張収縮作用
によるインダクタンス値のバラツキも抑制することがで
きる。In particular, it is not necessary to cover with a magnetic shield plate or the like and fix it with tape when shutting off the leakage magnetic flux, so that there is little variation in production, the productivity is improved, and the beating noise is reduced. Even if the adhesive is applied to the gap (G), the central magnetic core 17 is mechanically fixed by the external magnetic core 19, so that the variation in the inductance value due to the expansion and contraction of the adhesive can be suppressed. .
【００４１】また、分割中央磁芯２０は櫛形状にすると
ともに、外部磁芯１９はＵ字形状にしているので、中央
磁芯１７の中磁脚１５のギャップ（Ｇ）は、簡単に、外
部磁芯１９により位置決め固定でき、ギャップ（Ｇ）の
距離のバラツキを抑制し、より信頼性を向上できる。The gap (G) of the middle magnetic leg 15 of the central magnetic core 17 can be easily adjusted since the divided central magnetic core 20 is formed in a comb shape and the external magnetic core 19 is formed in a U shape. The positioning and fixing can be performed by the magnetic core 19, the variation in the distance of the gap (G) can be suppressed, and the reliability can be further improved.
【００４２】さらに、固定手段は、分割中央磁芯２０の
背磁脚側面２１およびこの背磁脚側面２１に対向する外
部磁芯１９の対向側面２４に設けているので、鉄芯用電
磁鋼板１３は、中央磁芯１７および外部磁芯１９とを組
み合わせやすくなるとともに、上面や下面ではなく側面
で組み合わせるので厚みも厚くならず、小型化を図るこ
とができる。Further, since the fixing means is provided on the back magnetic leg side surface 21 of the divided center magnetic core 20 and the opposing side surface 24 of the external magnetic core 19 opposed to the back magnetic leg side surface 21, the electromagnetic steel plate 13 for the iron core is provided. Can be easily combined with the central magnetic core 17 and the external magnetic core 19, and can be combined with the side surface, not the upper surface or the lower surface, so that the thickness does not increase and the size can be reduced.
【００４３】このとき、固定手段としては、分割中央磁
芯２０に円形状の嵌合溝２２を設けるとともに、嵌合溝
２２に嵌合する円形状の嵌合突起２３を外部磁芯１９に
設けているので、中央磁芯１７と外部磁芯１９との位置
固定を確実にすることができるとともに、製造後の経時
変化もなく、安定したインダクタンスを得られるととも
に、振動も少なくうなり音も小さい。さらに、嵌合突起
２３を嵌合溝２２と嵌合させる際、圧入性が良く、ま
た、抜けにくいので固定強度を向上させることもでき、
さらに、分割中央磁芯２０の背磁脚側面２１の中心線
（Ｏ）よりも外側に配置しているので、分割中央磁芯２
０の背磁脚１６に磁束が流れる際、外側ほど磁束密度が
低いため磁束抵抗を低減し、磁束効率の低下を防止する
こともできる。At this time, as the fixing means, a circular fitting groove 22 is provided in the divided central magnetic core 20, and a circular fitting projection 23 fitted in the fitting groove 22 is provided in the external magnetic core 19. As a result, the position of the center magnetic core 17 and the outer magnetic core 19 can be reliably fixed, and a stable inductance can be obtained without a change with the lapse of time after manufacture, and vibration is reduced and a beat sound is small. Further, when the fitting protrusion 23 is fitted into the fitting groove 22, the press-fitting property is good and the fixing strength can be improved because the fitting protrusion 23 is hard to come off.
Further, since the central magnetic core 20 is arranged outside the center line (O) of the back magnetic leg side surface 21 of the central magnetic core 20, the divided central magnetic core 2
When the magnetic flux flows through the 0 back magnetic leg 16, the magnetic flux density is lower toward the outside, so that the magnetic flux resistance can be reduced, and a decrease in the magnetic flux efficiency can be prevented.
【００４４】そして、分割中央磁芯２０および外部磁芯
１９はＵ字形状にするとともに、分割中央磁芯２０の背
磁脚側面幅（Ｗ）よりも外部磁芯１９の対向側面幅
（Ｔ）を小さくしているので、中央磁芯２０で形成され
る主磁路に流れる磁束は、外部磁芯１９に流れにくくな
り、中央磁芯２０内部を流れやすくなり、磁束効率の低
下を防止することができるとともに、外部磁芯を中央磁
芯に組み合わせる場合に、ボビンから距離が離れている
ため、ボビンに外傷を与えることを防ぐことができる。The divided central magnetic core 20 and the outer magnetic core 19 are U-shaped, and the width of the opposing side surface (T) of the outer magnetic core 19 is larger than the width (W) of the back magnetic leg side of the divided central magnetic core 20. Is reduced, the magnetic flux flowing in the main magnetic path formed by the central magnetic core 20 is less likely to flow to the outer magnetic core 19, and easily flows inside the central magnetic core 20, thereby preventing a reduction in magnetic flux efficiency. In addition, when the external magnetic core is combined with the central magnetic core, the bobbin can be prevented from being damaged because the distance is large from the bobbin.
【００４５】その上、図７（ａ），（ｂ）、図８（ｃ）
に示すように、分割中央磁芯２０および外部磁芯１９を
Ｕ字形状にすれば、図８（ｄ）に示すように、中心線
（Ｏ）で半分にした目の字形状の磁芯２５を金属鉄板か
ら型取る場合に比べて、取りしろ面積が多くなり、分割
中央磁芯２０および外部磁芯１９の型取における歩留り
を向上させることができる低コスト化に寄与できる。7 (a), 7 (b) and 8 (c)
As shown in FIG. 8, if the divided central magnetic core 20 and the outer magnetic core 19 are formed in a U-shape, as shown in FIG. As compared with the case where the metal core is molded from a metal iron plate, a larger area can be obtained, and the yield in molding the divided central magnetic core 20 and the outer magnetic core 19 can be improved, which can contribute to cost reduction.
【００４６】このように本発明の一実施の形態によれ
ば、鉄芯用電磁鋼板１３の中央磁芯１７と外部磁芯１９
との位置固定を確実にすることができ、中央磁芯１７の
中磁脚１５のギャップ（Ｇ）の距離のバラツキを抑制
し、信頼性の向上およびうなりの発生防止を図ることが
できるとともに、中央磁芯１７および外部磁芯１９とを
組み合わせやすくなり、厚みも厚くならず、小型化を図
ることもできる。As described above, according to the embodiment of the present invention, the central magnetic core 17 and the external magnetic core 19 of the magnetic steel sheet 13 for an iron core are provided.
Can be reliably fixed, the variation of the distance of the gap (G) of the middle magnetic leg 15 of the central magnetic core 17 can be suppressed, the reliability can be improved, and a beat can be prevented from occurring. The center core 17 and the outer core 19 can be easily combined, the thickness is not increased, and the size can be reduced.
【００４７】さらに、分割中央磁芯２０の背磁脚１６と
外部磁芯１９との接続面に磁束が流れる際、磁束抵抗を
低減し、磁束効率の低下を防止することもできるととも
に、分割中央磁芯２０および外部磁芯１９をＵ字形状に
すれば、金属鉄板から型取における歩留りを向上させる
ことができる。Further, when a magnetic flux flows on the connection surface between the back magnetic leg 16 of the divided central magnetic core 20 and the external magnetic core 19, the magnetic flux resistance can be reduced, and the magnetic flux efficiency can be prevented from lowering. If the magnetic core 20 and the external magnetic core 19 are U-shaped, the yield in molding from a metal iron plate can be improved.
【００４８】なお、本発明の一実施の形態では、中央磁
芯１７に嵌合溝２２を設け、外部磁芯１９に嵌合突起２
３を設けたが、中央磁芯１７に嵌合突起２３を設け、外
部磁芯１９に嵌合溝２２を設けても同様の効果を生じ
る。In the embodiment of the present invention, the fitting groove 22 is provided in the central magnetic core 17, and the fitting protrusion 2 is formed in the external magnetic core 19.
3, the same effect can be obtained even if the fitting projections 23 are provided on the central magnetic core 17 and the fitting grooves 22 are provided on the external magnetic core 19.
【００４９】また、図９、図１０に示すような形状の中
央磁芯１７および外部磁芯１９を有した鉄芯用電磁鋼板
１３でも同様の効果を生じる。The same effect can be obtained with the electromagnetic steel sheet 13 for an iron core having the central magnetic core 17 and the external magnetic core 19 having the shapes as shown in FIGS.
【００５０】そして、外部磁芯１９を用いなければ、も
ちろん従来と同様な構成にすることもでき、用途に応じ
て、外部磁芯１９を用いたり、用いなかったりして、使
い分けることもできる。If the external magnetic core 19 is not used, it is of course possible to adopt a configuration similar to the conventional one, and it is also possible to use the external magnetic core 19 with or without using it according to the application.
【００５１】[0051]
【発明の効果】以上のように本発明によれば、中央磁芯
および外部磁芯に固定手段を設け、中央磁芯と外部磁芯
とを組み合わせて互いに位置固定するので、中央磁芯の
位置を外部磁芯により的確に固定できるとともに、中央
磁芯の中磁脚のギャップの距離も的確に一定にすること
ができ、インダクタンス値のバラツキを抑制して信頼性
の向上を図るとともに、ギャップからの漏れ磁束の発生
も抑制して漏れ磁束の遮断の向上も図ったチョークコイ
ルを提供することができる。As described above, according to the present invention, the fixing means is provided on the central magnetic core and the external magnetic core, and the central magnetic core and the external magnetic core are combined and fixed to each other. Can be accurately fixed by the external magnetic core, the distance of the gap between the center magnetic legs of the central magnetic core can be exactly constant, and the variation in inductance value can be suppressed to improve reliability. The present invention can provide a choke coil that also suppresses the generation of the leakage magnetic flux and improves the interruption of the leakage magnetic flux.
【図１】本発明の一実施の形態におけるチョークコイル
の正面断面図FIG. 1 is a front sectional view of a choke coil according to an embodiment of the present invention.
【図２】同チョークコイルの分解斜視図FIG. 2 is an exploded perspective view of the choke coil.
【図３】同チョークコイルの斜視図FIG. 3 is a perspective view of the choke coil.
【図４】同チョークコイルの鉄芯用電磁鋼板の平面図FIG. 4 is a plan view of an electromagnetic steel sheet for an iron core of the choke coil.
【図５】同チョークコイルの鉄芯用電磁鋼板の突起部近
傍の拡大平面図FIG. 5 is an enlarged plan view of the vicinity of a protrusion of the electromagnetic steel sheet for an iron core of the choke coil.
【図６】同チョークコイルの鉄芯用電磁鋼板の組み合わ
せ時を示す平面図FIG. 6 is a plan view showing the choke coil in combination with an electromagnetic steel sheet for an iron core.
【図７】（ａ）Ｕ字形状磁芯の取りしろを示す金属鉄板
の平面図 （ｂ）Ｕ字形状磁芯の取りしろを示す他の金属鉄板の平
面図FIG. 7A is a plan view of a metal iron plate showing a clearance of a U-shaped magnetic core. FIG. 7B is a plan view of another metal iron plate showing a clearance of a U-shaped magnetic core.
【図８】（ｃ）Ｕ字形状磁芯の取りしろを示す他の金属
鉄板の平面図 （ｄ）中心線で半分にした目の字形状磁芯の取りしろを
示す金属鉄板の平面図FIG. 8 (c) is a plan view of another metal iron plate showing the clearance of the U-shaped magnetic core. (D) is a plan view of the metal iron plate showing the clearance of the eye-shaped magnetic core halved at the center line.
【図９】本発明の他の実施の形態におけるチョークコイ
ルの鉄芯用電磁鋼板の平面図FIG. 9 is a plan view of an electromagnetic steel sheet for an iron core of a choke coil according to another embodiment of the present invention.
【図１０】本発明の他の実施の形態におけるチョークコ
イルの鉄芯用電磁鋼板の平面図FIG. 10 is a plan view of an electromagnetic steel sheet for an iron core of a choke coil according to another embodiment of the present invention.
【図１１】従来のチョークコイルの斜視図FIG. 11 is a perspective view of a conventional choke coil.
【図１２】磁気シールド板装着前の同チョークコイルの
分解斜視図FIG. 12 is an exploded perspective view of the choke coil before a magnetic shield plate is attached.
【図１３】同チョークコイルの正面断面図FIG. 13 is a front sectional view of the choke coil.
１１ ボビン １２ 巻線 １３ 鉄芯用電磁鋼板 １４ 積層鉄芯 １５ 中磁脚 １６ 背磁脚 １７ 中央磁芯 １８ 外磁脚 １９ 外部磁芯 ２０ 分割中央磁芯 ２１ 背磁脚側面 ２２ 嵌合溝 ２３ 嵌合突起 ２４ 対向側面 DESCRIPTION OF SYMBOLS 11 Bobbin 12 Winding 13 Magnetic steel sheet for iron core 14 Laminated iron core 15 Medium magnetic leg 16 Back magnetic leg 17 Central magnetic core 18 External magnetic leg 19 External magnetic core 20 Split central magnetic core 21 Back magnetic leg side surface 22 Fitting groove 23 Mating protrusion 24 Opposite side surface
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０１Ｆ 27/24 Ｈ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H01F 27/24 H
Claims (8)
巻回した巻線と、前記ボビンの貫通孔に挿入した鉄芯用
鋼板を複数枚積層してなる積層鉄芯とを備え、前記鉄芯
用鋼板は前記ボビンの貫通孔内に配置する中磁脚と前記
中磁脚に連接し貫通孔外に配置する背磁脚とを有した中
央磁芯と、前記ボビンの貫通孔外に配置する外磁脚を有
した外部磁芯とを組み合わせて形成するとともに、前記
中央磁芯は中磁脚で分割された２つの分割中央磁芯をギ
ャップを介して互いに向き合わせて形成しており、前記
中央磁芯および前記外部磁芯に固定手段を設け、前記中
央磁芯と前記外部磁芯とを組み合わせて位置固定したチ
ョークコイル。1. A bobbin having a through-hole, a winding wound around the bobbin, and a laminated iron core formed by laminating a plurality of steel sheets for an iron core inserted into the through-hole of the bobbin, A steel sheet for an iron core has a central magnetic core having a middle magnetic leg arranged in the through hole of the bobbin and a back magnetic leg connected to the middle magnetic leg and arranged outside the through hole, and outside the through hole of the bobbin. The central magnetic core is formed by combining an external magnetic core having an external magnetic leg to be arranged, and the central magnetic core is formed by facing two divided central magnetic cores divided by the medium magnetic leg via a gap. A choke coil provided with fixing means for the central magnetic core and the external magnetic core, and fixed in position by combining the central magnetic core and the external magnetic core;
外部磁芯はＵ字形状にした請求項１記載のチョークコイ
ル。2. The split central magnetic core has a comb shape,
2. The choke coil according to claim 1, wherein the external magnetic core is U-shaped.
および前記背磁脚側面に対向する外部磁芯の対向側面に
設けた請求項１記載のチョークコイル。3. The choke coil according to claim 1, wherein the fixing means is provided on a back magnetic leg side surface of the divided central magnetic core and on an opposing side surface of the external magnetic core facing the back magnetic leg side surface.
にするとともに、前記分割中央磁芯の背磁脚側面幅より
も前記外部磁芯の対向側面幅を小さくした請求項３記載
のチョークコイル。4. The split central magnetic core and the outer magnetic core are U-shaped, and the width of the opposing side surface of the outer magnetic core is smaller than the width of the back magnetic leg side surface of the split central magnetic core. choke coil.
の中心線よりも外側に配置した請求項３記載のチョーク
コイル。5. The choke coil according to claim 3, wherein the fixing means is disposed outside the center line of the side surface of the back magnetic leg of the divided central magnetic core.
けるとともに、前記嵌合溝に嵌合する嵌合突起を外部磁
芯に設けた請求項３記載のチョークコイル。6. The choke coil according to claim 3, wherein the fixing means has a fitting groove provided on the divided central magnetic core, and a fitting projection fitted to the fitting groove is provided on the external magnetic core.
とともに、前記嵌合溝に嵌合する嵌合突起を分割中央磁
芯に設けた請求項３記載のチョークコイル。7. The choke coil according to claim 3, wherein the fixing means has a fitting groove provided on the external magnetic core, and a fitting projection fitted with the fitting groove is provided on the divided central magnetic core.
にした請求項６または請求項７に記載のチョークコイ
ル。8. The choke coil according to claim 6, wherein the fitting projection and the fitting groove have a circular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27080399A JP3534011B2 (en) | 1999-09-24 | 1999-09-24 | choke coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27080399A JP3534011B2 (en) | 1999-09-24 | 1999-09-24 | choke coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001093737A true JP2001093737A (en) | 2001-04-06 |
| JP3534011B2 JP3534011B2 (en) | 2004-06-07 |
Family
ID=17491245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27080399A Expired - Lifetime JP3534011B2 (en) | 1999-09-24 | 1999-09-24 | choke coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3534011B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016015394A (en) * | 2014-07-02 | 2016-01-28 | 株式会社京三製作所 | Impedance bond |
| WO2018056049A1 (en) * | 2016-09-21 | 2018-03-29 | 株式会社オートネットワーク技術研究所 | Reactor, and magnetic core for reactor |
| WO2018173900A1 (en) * | 2017-03-23 | 2018-09-27 | パナソニックＩｐマネジメント株式会社 | Reactor and power supply circuit |
| JP2018157066A (en) * | 2017-03-17 | 2018-10-04 | ファナック株式会社 | AC reactor |
| WO2019142755A1 (en) * | 2018-01-17 | 2019-07-25 | パナソニックＩｐマネジメント株式会社 | Reactor, core member, and power supply circuit |
-
1999
- 1999-09-24 JP JP27080399A patent/JP3534011B2/en not_active Expired - Lifetime
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| JP2016015394A (en) * | 2014-07-02 | 2016-01-28 | 株式会社京三製作所 | Impedance bond |
| WO2018056049A1 (en) * | 2016-09-21 | 2018-03-29 | 株式会社オートネットワーク技術研究所 | Reactor, and magnetic core for reactor |
| JP2018049948A (en) * | 2016-09-21 | 2018-03-29 | 株式会社オートネットワーク技術研究所 | Reactor and magnetic core for reactor |
| US11417455B2 (en) | 2016-09-21 | 2022-08-16 | Autonetworks Technologies, Ltd. | Reactor and magnetic core for reactor |
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| JP2018157066A (en) * | 2017-03-17 | 2018-10-04 | ファナック株式会社 | AC reactor |
| WO2018173900A1 (en) * | 2017-03-23 | 2018-09-27 | パナソニックＩｐマネジメント株式会社 | Reactor and power supply circuit |
| JPWO2018173900A1 (en) * | 2017-03-23 | 2020-01-30 | パナソニックＩｐマネジメント株式会社 | Reactor, power circuit |
| JP7126210B2 (en) | 2017-03-23 | 2022-08-26 | パナソニックＩｐマネジメント株式会社 | reactor, power circuit |
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| JPWO2019142755A1 (en) * | 2018-01-17 | 2021-01-14 | パナソニックＩｐマネジメント株式会社 | Reactor, core member, and power supply circuit |
| WO2019142755A1 (en) * | 2018-01-17 | 2019-07-25 | パナソニックＩｐマネジメント株式会社 | Reactor, core member, and power supply circuit |
| JP7246028B2 (en) | 2018-01-17 | 2023-03-27 | パナソニックＩｐマネジメント株式会社 | Reactor, core material, and power supply circuit |
| US11955267B2 (en) | 2018-01-17 | 2024-04-09 | Panasonic Intellectual Property Management Co., Ltd. | Reactor, core member, and power supply circuit |
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