JPH07272946A - E-shaped core - Google Patents
E-shaped coreInfo
- Publication number
- JPH07272946A JPH07272946A JP6087343A JP8734394A JPH07272946A JP H07272946 A JPH07272946 A JP H07272946A JP 6087343 A JP6087343 A JP 6087343A JP 8734394 A JP8734394 A JP 8734394A JP H07272946 A JPH07272946 A JP H07272946A
- Authority
- JP
- Japan
- Prior art keywords
- cross
- yoke
- root
- section
- central 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.)
- Pending
Links
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、Ｅ形コアを用いて薄形
のトランスを構成する場合に処理電力の増加に寄与でき
るＥ形コアの構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an E-shaped core which can contribute to increase in processing power when a thin transformer is constructed by using the E-shaped core.
【０００２】[0002]
【従来の技術】図８は従来のＥ形コアの一例を示す斜視
図であり、ヨーク２０、円柱状の中央脚２１、二つの外
側脚２２から構成されている。このようなＥ形コアを用
いてトランスを構成する場合、そのトランスの処理電力
は磁路の通るＥ形コアの断面積に依存する。薄形のＥＥ
形トランスを構成する場合には、ヨーク２０の底面から
中央脚２１、および外側脚２２の先端までの高さを低く
する必要があり、必然的にヨーク２０の厚みが薄くな
る。ヨーク２０の厚みが薄くなると、ヨーク２０内の中
央脚２１の周囲に沿った断面は狭くなる。2. Description of the Related Art FIG. 8 is a perspective view showing an example of a conventional E-shaped core, which is composed of a yoke 20, a columnar center leg 21, and two outer legs 22. When a transformer is constructed using such an E-shaped core, the processing power of the transformer depends on the cross-sectional area of the E-shaped core through which the magnetic path passes. Thin EE
In the case of forming the shape transformer, it is necessary to reduce the height from the bottom surface of the yoke 20 to the tips of the center leg 21 and the outer leg 22, which inevitably reduces the thickness of the yoke 20. As the yoke 20 becomes thinner, the cross section along the periphery of the central leg 21 inside the yoke 20 becomes narrower.
【０００３】この狭くなる断面は、図８の部分拡大斜視
図である図９においてヨーク２０を透視して点線で表示
してあり、２３の符号を付与してある。断面２３は、中
央脚２１の根本２４の周囲に沿ったその根本２４からヨ
ーク２０の底面までの断面である。従って、断面２３の
形状は中央脚２１の断面全体が円形であるから、円筒状
になる。Ｅ形コア内の磁路は、中央脚２１からこの断面
２３を横切ってヨーク２０を水平に外側脚２２に延在す
る。This narrowing cross section is shown by a dotted line through the yoke 20 in FIG. 9 which is a partially enlarged perspective view of FIG. 8 and is designated by the reference numeral 23. The cross section 23 is a cross section along the periphery of the root 24 of the center leg 21 from the root 24 to the bottom surface of the yoke 20. Therefore, the cross section 23 has a cylindrical shape because the entire cross section of the central leg 21 is circular. The magnetic path in the E-shaped core extends horizontally from the central leg 21 across this cross section 23 to the outer leg 22 of the yoke 20.
【０００４】中央脚２１の直径を２．６ｍｍ、ヨーク２
０の厚みを０．５ｍｍ、ヨーク２０の幅を５．３ｍｍと
すると、断面２３の断面積Ｓ２３は（１）式により得ら
れる。 Ｓ２３＝２．６×３．１４×０．５＝４．１ｍｍ2 （１） 中央脚２１の断面積Ｓ２１とヨーク２０の断面積Ｓ２０
は、（２）式と（３）式で夫々得られる。 Ｓ２１＝１．３×１．３×３．１４＝５．３ｍｍ2 （２） Ｓ２０＝０．５×５．３＝２．６５ｍｍ2 （３）The diameter of the central leg 21 is 2.6 mm, and the yoke 2 is
When the thickness of 0 is 0.5 mm and the width of the yoke 20 is 5.3 mm, the cross-sectional area S23 of the cross-section 23 is obtained by the equation (1). S23 = 2.6 × 3.14 × 0.5 = 4.1 mm 2 (1) The cross-sectional area S21 of the central leg 21 and the cross-sectional area S20 of the yoke 20.
Can be obtained by equations (2) and (3), respectively. S21 = 1.3 × 1.3 × 3.14 = 5.3 mm 2 (2) S20 = 0.5 × 5.3 = 2.65 mm 2 (3)
【０００５】ヨーク２０内では磁路が２方向に分かれる
から、磁路の通るヨーク２０の断面積としては断面積Ｓ
２０の２倍の値、つまり５．３ｍｍ2 を用いればよい。
Ｅ形コアを用いて薄形のＥＥ形トランスを構成する場合
には、ヨーク２０の厚みを薄くする必要からこの中央脚
２１の下側の断面２３のように、ヨーク２０内には他の
部分に比較して磁路の通る断面の狭い部分が生じやす
い。そして、このような磁路の通る断面の狭い部分を有
するＥ形コアは、トランスの処理電力を高めるうえで極
めて不利であった。Since the magnetic path is divided into two directions in the yoke 20, the cross-sectional area S of the yoke 20 through which the magnetic path passes is S.
A value twice as large as 20, that is, 5.3 mm 2 may be used.
When a thin EE type transformer is formed by using the E type core, it is necessary to reduce the thickness of the yoke 20. Therefore, as shown in the lower section 23 of the central leg 21, other portions are not formed in the yoke 20. Compared with the above, a narrow portion of the cross section through which the magnetic path passes is likely to occur. The E-shaped core having such a narrow cross section through which the magnetic path passes is extremely disadvantageous in increasing the processing power of the transformer.
【０００６】[0006]
【発明が解決しようとする課題】本発明の課題は、中央
脚の根本部分の断面積を広くし、その根本部分の周囲に
沿ったヨーク内の断面を広くすることにより、Ｅ形コア
を用いて薄形のトランスを構成する場合にその処理電力
を高めることのできるＥ形コアを提供することにある。
無論、ＥＥ形トランスを構成した場合に巻線が位置する
断面、いわゆる窓面積が従来に比較してほとんど狭くな
ることはない。An object of the present invention is to use an E-shaped core by widening the cross-sectional area of the root portion of the central leg and widening the cross-section inside the yoke along the periphery of the root portion. Another object of the present invention is to provide an E-shaped core capable of increasing the processing power when a thin transformer is constructed.
Of course, when an EE type transformer is constructed, the cross-section where the winding is located, that is, the so-called window area, is almost never smaller than in the conventional case.
【０００７】[0007]
【課題を解決するための手段】本発明のＥ形コアの中央
脚の根本部分は、該中央脚の断面が根本近傍から根本へ
広がった状態でヨークに接続しており、中央脚の断面の
広がり始める根本近傍の周囲に沿った該根本近傍からヨ
ーク底面までの断面積、およびヨークに接続する中央脚
の根本の周囲に沿った該根本からヨーク底面までの断面
積が、中央脚の根本近傍よりも上側の断面積、又はヨー
クの断面積を２倍した値の小さい方の値以上であること
を特徴とする。The root portion of the central leg of the E-shaped core of the present invention is connected to the yoke in a state where the cross section of the central leg spreads from the vicinity of the root to the root. The cross-sectional area from the root to the bottom of the yoke along the circumference of the root that begins to spread, and the cross-sectional area from the root to the bottom of the yoke along the circumference of the root of the central leg connected to the yoke are near the root of the central leg. It is characterized in that it is equal to or larger than the smaller one of the cross-sectional area on the upper side or the value obtained by doubling the cross-sectional area of the yoke.
【０００８】[0008]
【実施例】以下、本発明のＥ形コアの実施例を示す図１
から図４までを参照しながら説明する。図１は斜視図、
図２は図１のＡ−Ａ断面図、図３と図４は夫々図１の部
分拡大斜視図である。図１から図４において、１は中央
脚、２はヨーク、３は外側脚であり、Ｅ形コア全体はフ
ェライトを主成分とする材料から構成される。中央脚２
はほぼ円柱状であるが、その根本部分６は根本近傍４か
ら根本５へ断面が徐々に広がった状態でヨーク２に接続
している。この根本部分６は、図２の断面図に示される
ように根本近傍４から根本５へ斜面を設けることにより
形成される。EXAMPLE FIG. 1 showing an example of the E-shaped core of the present invention.
4 to FIG. 4 will be described. 1 is a perspective view,
2 is a sectional view taken along the line AA of FIG. 1, and FIGS. 3 and 4 are partially enlarged perspective views of FIG. 1, respectively. 1 to 4, 1 is a central leg, 2 is a yoke, 3 is an outer leg, and the entire E-shaped core is made of a material whose main component is ferrite. Central leg 2
Has a substantially columnar shape, but its root portion 6 is connected to the yoke 2 in a state where its cross section gradually widens from the root vicinity 4 to the root 5. The root portion 6 is formed by providing an inclined surface from the root vicinity 4 to the root 5 as shown in the sectional view of FIG.
【０００９】中央脚２の断面はどこも円形であるが、断
面の広がり始める根本近傍４よりも下側の断面とその上
側の断面は相似形である。なお、ヨーク２と外側脚３の
断面は矩形であり、同じ断面積である。このようなＥ形
コアの根本部分６の周囲に沿ったヨーク２内の断面は、
図３と図４に代表して示されている。すなわち、図３に
示されるように根本近傍４の周囲に沿った該根本近傍４
からヨーク２の底面７までの円筒状の断面８と、図４に
示されるように根本５の周囲に沿った該根本５からヨー
ク２の底面７までの円筒状の断面９である。なお、この
断面８と断面９は、理解を容易にするために図３と図４
で別々に透視して点線で示してある。断面８と断面９を
横切って中央脚１の磁路はヨーク２内に延在するが、こ
の断面８と断面９が存在することによって中央脚１の下
側のヨーク２内の磁路の通る断面を広くできる。Although the cross section of the central leg 2 is circular, the cross section below the root vicinity 4 where the cross section begins to spread and the cross section above it are similar shapes. The yoke 2 and the outer leg 3 have a rectangular cross section and have the same cross sectional area. The cross section in the yoke 2 along the periphery of the root portion 6 of such an E-shaped core is
Representatively shown in FIGS. 3 and 4. That is, as shown in FIG. 3, the root vicinity 4 along the periphery of the root vicinity 4
To a bottom surface 7 of the yoke 2 and a cylindrical cross section 9 from the root 5 to the bottom surface 7 of the yoke 2 along the periphery of the root 5 as shown in FIG. The cross section 8 and the cross section 9 are shown in FIGS.
Are shown separately and are shown in dotted lines. The magnetic path of the central leg 1 extends into the yoke 2 across the cross sections 8 and 9, but the presence of the cross sections 8 and 9 allows the magnetic path in the yoke 2 below the central leg 1 to pass. The cross section can be widened.
【００１０】次に、数値によって図８と図９で示される
従来のＥ形コアとの比較を行う。中央脚１の根本近傍４
より上側の直径Ｂ、ヨーク２の厚みＤ、ヨーク２の幅Ｗ
は、夫々従来のＥ形コアの中央脚２１の直径２．６ｍ
ｍ、ヨーク２０の厚み０．５ｍｍ、ヨーク２０の幅５．
３ｍｍと同じである。根本５の直径Ｃは３．５ｍｍ、根
本５からヨーク２の底面７までの高さは、ヨーク２の厚
みＤであるから０．５ｍｍ、根本近傍４からヨーク２の
底面７までの高さＥは０．６５ｍｍである。この場合の
根本近傍４より上側の中央脚１の断面積と、ヨーク２の
断面積の２倍の値はいずれも５．３ｍｍ2 であり、従来
のＥ形コアと同じである。Next, a numerical comparison will be made with the conventional E-shaped core shown in FIGS. 4 near the root of the central leg 1
Upper diameter B, yoke 2 thickness D, yoke 2 width W
Is the diameter of the central leg 21 of the conventional E-shaped core is 2.6 m.
m, the thickness of the yoke 20 is 0.5 mm, and the width of the yoke 20 is 5.
The same as 3 mm. The diameter C of the root 5 is 3.5 mm, and the height from the root 5 to the bottom surface 7 of the yoke 2 is 0.5 mm because the thickness D of the yoke 2 is the height E from the root vicinity 4 to the bottom surface 7 of the yoke 2. Is 0.65 mm. In this case, the cross-sectional area of the central leg 1 above the root vicinity 4 and the value of twice the cross-sectional area of the yoke 2 are both 5.3 mm 2, which is the same as the conventional E-shaped core.
【００１１】断面８の断面積Ｓ８と断面９の断面積Ｓ９
は、夫々（４）式と（５）式により得られる。 Ｓ８＝２．６×３．１４×０．６５＝５．３ｍｍ2 （４） Ｓ９＝３．５×３．１４×０．５＝５．５ｍｍ2 （５） 断面８の周囲の長さは図９に示す従来のＥ形コアの断面
２３と同じであるが、高さが断面２３よりも高いことに
よりその断面積Ｓ８が広くなる。また断面９の高さは従
来のＥ形コアの断面２３と同じであるが、周囲が断面２
３よりも長いことにより断面積Ｓ９が広くなる。このよ
うに断面積Ｓ８、Ｓ９が他の部分の断面積と同じ程度に
なるので、ヨーク２内で磁路の通る断面の狭くなる部分
が従来と異なって存在しない。Cross-sectional area S8 of cross-section 8 and cross-sectional area S9 of cross-section 9
Are obtained by the equations (4) and (5), respectively. S8 = 2.6 × 3.14 × 0.65 = 5.3 mm 2 (4) S9 = 3.5 × 3.14 × 0.5 = 5.5 mm 2 (5) The perimeter of the cross section 8 is Although it is the same as the cross-section 23 of the conventional E-shaped core shown in FIG. 9, the height S is higher than the cross-section 23, so that the cross-sectional area S8 becomes wider. The height of the cross section 9 is the same as that of the cross section 23 of the conventional E-shaped core, but the circumference is the cross section 2
Since it is longer than 3, the cross-sectional area S9 becomes wider. Since the cross-sectional areas S8 and S9 are approximately the same as the cross-sectional areas of the other portions in this manner, there is no portion where the cross section through which the magnetic path passes in the yoke 2 becomes narrower than in the conventional case.
【００１２】Ｅ形コアのヨーク２の底面７から外側脚３
と中央脚１の先端までの高さＦ、ヨーク２の幅Ｗとその
厚みＤを従来のＥ形コアと同じにした状態で、このよう
に中央脚１の断面が徐々に広がる根本部分６を形成する
ことにより、中央脚１の下側のヨーク２内の磁路の通る
狭い部分の断面積を３０％程度増やすことができる。ち
なみに、図５には本発明のＥ形コアによって形成される
ＥＥ形トランスのコア部分の断面図を示してある。根本
部分６の断面積は０．０３３７５ｍｍ2 であるから、巻
枠１０の角１１に小さなテーパが必要な程度であり、巻
線１２の巻かれる実際の窓面積は変わらない。From the bottom surface 7 of the yoke 2 of the E-shaped core to the outer leg 3
With the height F to the tip of the central leg 1 and the width W and the thickness D of the yoke 2 being the same as those of the conventional E-shaped core, the root portion 6 in which the cross section of the central leg 1 gradually widens in this way is formed. By forming it, it is possible to increase the cross-sectional area of the narrow portion of the yoke 2 below the central leg 1 through which the magnetic path passes by about 30%. Incidentally, FIG. 5 shows a sectional view of the core portion of the EE type transformer formed by the E type core of the present invention. Since the cross-sectional area of the root portion 6 is 0.03375 mm 2 , only a small taper is required at the corner 11 of the bobbin 10, and the actual window area around which the winding wire 12 is wound does not change.
【００１３】図６、図７は夫々本発明のＥ形コアの別の
実施例を示す断面図であり、根本部分の形状が異なって
いる。なお、最初の実施例と同一部分は同じ符号を付与
してある。図６の根本部分２０は根本近傍２１で中央脚
１の断面積が急に広がり、その断面積は根本２２まで変
化しない。従って、根本部分２０の断面は階段状にな
る。このような根本部分２０でも、根本部分２０の周囲
に沿ったヨーク２内の断面積を他の部分と同じ程度にで
きる。図７の根本部分３０は、根本近傍３１から根本３
２までの面が外側に湾曲した曲面になっている。このよ
うに中央脚１の根本部分の広がる状態は、種々の変形が
可能である。なお、実施例では中央脚１の断面形状は円
形であったが、正方形や長方形のような別の形状でもよ
い。6 and 7 are cross-sectional views showing another embodiment of the E-shaped core of the present invention, in which the shape of the root portion is different. The same parts as those in the first embodiment are designated by the same reference numerals. In the root portion 20 of FIG. 6, the cross-sectional area of the central leg 1 suddenly expands in the vicinity of the root 21, and the cross-sectional area does not change to the root 22. Therefore, the root portion 20 has a stepwise cross section. Even with such a root portion 20, the cross-sectional area in the yoke 2 along the periphery of the root portion 20 can be made approximately the same as that of the other portions. The root portion 30 of FIG.
The surfaces up to 2 are curved to the outside. In this way, the state in which the root portion of the central leg 1 spreads can be variously modified. Although the central leg 1 has a circular cross-sectional shape in the embodiment, it may have another shape such as a square or a rectangle.
【００１４】[0014]
【発明の効果】以上述べたように、本発明のＥ形コアは
中央脚の下側にその断面を広くした根本部分を設けるこ
とにより、中央脚の下側のヨーク内に磁路の通る断面の
狭くなる部分が生じないようにしてある。このことによ
り、薄形のＥＥ形トランスを形成した場合にも処理電力
を高めることができる。実施例では、狭くなる部分の断
面積を３０％増加できたことにより、３０％の処理電力
を増やすことができる。無論、巻線の位置する実質的な
窓面積が減少することはない。また、本発明のＥ形コア
は、ＥＩ形トランスを形成する場合でもＥＥ形トランス
の場合と同じようにその処理電力の増加に寄与できる。As described above, the E-shaped core of the present invention is provided with a root portion having a wide cross section on the lower side of the central leg, so that the cross section through which the magnetic path passes in the lower yoke of the central leg. It is designed so that there is no narrowing part. As a result, the processing power can be increased even when a thin EE type transformer is formed. In the embodiment, the processing power of 30% can be increased because the cross-sectional area of the narrowed portion can be increased by 30%. Of course, the substantial window area in which the winding is located does not decrease. Further, the E-shaped core of the present invention can contribute to increase in processing power even when forming the EI type transformer, as in the case of the EE type transformer.
【図１】 本発明のＥ形コアの実施例を示す斜視図であ
る。FIG. 1 is a perspective view showing an embodiment of an E-shaped core of the present invention.
【図２】 図１のＡ−Ａ断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】 図１の部分拡大斜視図である。FIG. 3 is a partially enlarged perspective view of FIG.
【図４】 図１の別の部分拡大断面図である。FIG. 4 is another partially enlarged cross-sectional view of FIG.
【図５】 ＥＥ形トランスのコア部分の断面図である。FIG. 5 is a sectional view of a core portion of an EE type transformer.
【図６】 本発明のＥ形コアの別の実施例を示す断面図
である。FIG. 6 is a sectional view showing another embodiment of the E-shaped core of the present invention.
【図７】 本発明のＥ形コアのさらに別の実施例を示す
断面図である。FIG. 7 is a sectional view showing still another embodiment of the E-shaped core of the present invention.
【図８】 従来のＥ形コアを示す斜視図である。FIG. 8 is a perspective view showing a conventional E-shaped core.
【図９】 図８の部分拡大斜視図である。9 is a partially enlarged perspective view of FIG.
１ 中央脚 ２ ヨーク ３ 外側脚 ６ 根本部分 1 central leg 2 yoke 3 outer leg 6 root part
Claims (2)
根本近傍から根本へ広がった状態でヨークに接続してお
り、中央脚の断面の広がり始める根本近傍の周囲に沿っ
た該根本近傍からヨーク底面までの断面積、およびヨー
クに接続する中央脚の根本の周囲に沿った該根本からヨ
ーク底面までの断面積が、中央脚の根本近傍よりも上側
の断面積、又はヨークの断面積を２倍した値の小さい方
の値以上であることを特徴とするＥ形コア。1. The root part of the central leg is connected to the yoke in a state where the cross section of the central leg spreads from the vicinity of the root to the root, and the root along the circumference of the vicinity of the root where the cross section of the central leg begins to spread. The cross-sectional area from the vicinity to the bottom surface of the yoke and the cross-sectional area from the root to the bottom surface of the yoke along the circumference of the root of the central leg connected to the yoke are the cross-sectional area above the root of the central leg or the disconnection of the yoke. An E-shaped core characterized by having a value equal to or greater than a smaller value of twice the area.
根本近傍よりも上側の断面と相似形である請求項１のＥ
形コア。2. The E of claim 1, wherein the cross section of the root portion of the central leg is similar to the cross section above the vicinity of the root of the central leg.
Shaped core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6087343A JPH07272946A (en) | 1994-03-31 | 1994-03-31 | E-shaped core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6087343A JPH07272946A (en) | 1994-03-31 | 1994-03-31 | E-shaped core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07272946A true JPH07272946A (en) | 1995-10-20 |
Family
ID=13912229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6087343A Pending JPH07272946A (en) | 1994-03-31 | 1994-03-31 | E-shaped core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07272946A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014116355A (en) * | 2012-12-06 | 2014-06-26 | Mitsumi Electric Co Ltd | Inductor |
| WO2016031993A1 (en) * | 2014-08-29 | 2016-03-03 | 株式会社タムラ製作所 | Reactor |
| TWI696200B (en) * | 2019-06-03 | 2020-06-11 | 美桀科技股份有限公司 | Inductor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5218915U (en) * | 1975-07-29 | 1977-02-10 | ||
| JPH0521232A (en) * | 1991-07-15 | 1993-01-29 | Sony Corp | Inductance element |
-
1994
- 1994-03-31 JP JP6087343A patent/JPH07272946A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5218915U (en) * | 1975-07-29 | 1977-02-10 | ||
| JPH0521232A (en) * | 1991-07-15 | 1993-01-29 | Sony Corp | Inductance element |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014116355A (en) * | 2012-12-06 | 2014-06-26 | Mitsumi Electric Co Ltd | Inductor |
| WO2016031993A1 (en) * | 2014-08-29 | 2016-03-03 | 株式会社タムラ製作所 | Reactor |
| JPWO2016031993A1 (en) * | 2014-08-29 | 2017-06-08 | 株式会社タムラ製作所 | Reactor |
| TWI696200B (en) * | 2019-06-03 | 2020-06-11 | 美桀科技股份有限公司 | Inductor |
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| A02 | Decision of refusal |
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