JPH0374015B2 - - Google Patents
Info
- Publication number
- JPH0374015B2 JPH0374015B2 JP5218384A JP5218384A JPH0374015B2 JP H0374015 B2 JPH0374015 B2 JP H0374015B2 JP 5218384 A JP5218384 A JP 5218384A JP 5218384 A JP5218384 A JP 5218384A JP H0374015 B2 JPH0374015 B2 JP H0374015B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- coil
- groove
- wound
- core
- 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.)
- Expired
Links
- 238000004804 winding Methods 0.000 claims description 52
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は高周波回路に於ける平衝・不平衝およ
びインピーダンスの変換等に用いられるバルント
ランスの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in balun transformers used for balance/unbalance and impedance conversion in high frequency circuits.
（従来技術）
テレビジヨン受像機のアンテナ入力部等には、
同軸フイーダの不平衝75Ωと平行線のフイーダの
平衝300Ωとの変換のためにバルントランスが用
いられている。このバルントランスは、第１図に
示す様な、夫々トランスに構成した２対のコイル
を適宜結線したものが普通である。この第１図に
示されるバルントランスは、端子ａ−ｂ間の平衝
300Ωと端子ｃ−ｄ間の不平衝75Ωとの変換を行
なうものである。(Prior art) The antenna input section of a television receiver, etc.
A balun transformer is used to convert the unbalanced 75Ω of the coaxial feeder to the balanced 300Ω of the parallel feeder. This balun transformer is normally constructed by suitably connecting two pairs of coils, each constructed into a transformer, as shown in FIG. The balun transformer shown in FIG. 1 has an equilibrium between terminals a and b.
It performs conversion between 300Ω and the unbalanced 75Ω between terminals c and d.
従来、この種のバルントランスは、通常メガネ
型コアと呼ばれている。２つの透孔を有するフエ
ライトコアを用い、その２つの透孔の各々に２本
の線材で２本の線材によるバイフアイラ巻きされ
たコイルを１対ずつ巻回したものが一般的であつ
た。このバルントランスに用いられるメガネ型コ
アは非常に小さなものであつて、これにあけられ
た小さな透孔にコイルを巻く作業は極めて手間の
かかる繁雑なものであり、さらに自動機を用いて
の巻線作業はほとんど不可能なものであつた。 Conventionally, this type of balun transformer is usually called a glasses-type core. Generally, a ferrite core having two through holes was used, and a pair of bifilar-wound coils of two wires were wound around each of the two through holes. The spectacle-shaped core used in this balun transformer is extremely small, and winding the coil around the small through hole in it is extremely time-consuming and complicated. Line work was almost impossible.
（発明の目的）
本発明はこの点に着目してなされたものであ
り、巻線作業を容易なものとするとともに、自動
機を用いての巻線をも可能とした高周波線輪の提
供を目的とするものである。(Object of the Invention) The present invention has been made focusing on this point, and aims to provide a high-frequency wire ring that not only facilitates winding work but also enables winding using an automatic machine. This is the purpose.
（発明の構成）
そのため、本発明のバルントランスでは、円柱
形状をなし、コイルの線径よりやや幅の広い２条
の巻線溝が外周面より所定の深さで刻まれ、ま
た、両端面の各々にはコイルの線径よりやや広い
幅で前記巻線溝に連通する割り溝が設けられたコ
アと、前記巻線溝の各々に２巻線ずつ１列にうず
巻状に巻回され、巻始めが夫々割り溝より引出さ
れているコイルとを有し、これら各コイルが適宜
結線されて平衝・不平衝およびインピーダンスの
変換回路を形成する如く構成されており、これに
よつて前述の目的を達成せんとするものである。(Structure of the Invention) Therefore, in the balun transformer of the present invention, two winding grooves having a cylindrical shape and slightly wider than the wire diameter of the coil are carved at a predetermined depth from the outer peripheral surface, and two winding grooves are formed on both end surfaces. Each of the cores has a core provided with a split groove having a width slightly wider than the wire diameter of the coil and communicating with the winding groove, and each of the winding grooves has two windings wound in a spiral shape in one row. , and coils whose winding beginnings are drawn out from the dividing grooves, and these coils are connected as appropriate to form a balanced/unbalanced and impedance conversion circuit, thereby achieving the above-mentioned The aim is to achieve the objectives of
（実施例）
次に本発明の実施の一例を図面を参照しながら
説明する。(Example) Next, an example of implementation of the present invention will be described with reference to the drawings.
第２図は本発明に係るバルントランスの一実施
例の正面図、第３図はその−線断面図であ
る。この両図面に於て、１はコア、２はコイルで
ある。 FIG. 2 is a front view of an embodiment of the balun transformer according to the present invention, and FIG. 3 is a sectional view thereof taken along the line -. In both drawings, 1 is a core and 2 is a coil.
コア１は第４図にその外観形状の詳細を示す如
く略円柱形状をなしており、本実施例に於ては、
例えば直径８mm、長さ5.7mm程度のフエライトコ
アが用いられている。そして、このコア１の外周
面には、環状の巻線溝１１が２条刻設されてい
る。この巻線溝１１は、その幅がコイル２の線径
よりやや広い値に設定されている。例えば、コイ
ル２が直径0.32mmの線材で形成されている場合に
は、この巻線溝１１の幅は0.35mm程度に設定され
る。また、その深さは、この巻線溝１１内に所定
の巻数のコイル２が収容できる程度の所定の値に
設定される。例えば、線径0.32mmの線材を３回巻
回したものを２巻線収容するものであれば、巻線
溝１１の深さは３mm程度に設定される。 The core 1 has a substantially cylindrical shape, as shown in detail in FIG. 4, and in this embodiment,
For example, a ferrite core with a diameter of 8 mm and a length of about 5.7 mm is used. Two annular winding grooves 11 are formed on the outer peripheral surface of the core 1. The width of the winding groove 11 is set to be slightly wider than the wire diameter of the coil 2. For example, if the coil 2 is made of a wire rod with a diameter of 0.32 mm, the width of the winding groove 11 is set to about 0.35 mm. Further, the depth is set to a predetermined value such that a predetermined number of turns of the coil 2 can be accommodated in the winding groove 11 . For example, if two windings of a wire having a wire diameter of 0.32 mm are wound three times are accommodated, the depth of the winding groove 11 is set to about 3 mm.
また、コア１の両端面の各々からは割り溝１２
が前記巻線溝１１へ連通している。この割り溝１
２は夫々コア１の外周面に開口しており、その端
部１２ａは前記巻線溝１１の底面に一致してい
る。この割り溝１２の幅はコイル２の線径よりや
や広い値に設定されており、そのゆとりは前記巻
線溝１１の場合より若干大きくとられている。例
えば、コイル２の線径が前述の0.32mmであれば、
この割り溝１２の幅は0.5mm程度に設定される。 Further, from each of both end faces of the core 1, there are grooves 12.
is in communication with the winding groove 11. This groove 1
2 are open on the outer circumferential surface of the core 1, and their ends 12a coincide with the bottom surface of the winding groove 11. The width of this dividing groove 12 is set to a value slightly wider than the wire diameter of the coil 2, and its clearance is set to be slightly larger than that of the winding groove 11. For example, if the wire diameter of coil 2 is 0.32 mm as mentioned above,
The width of this groove 12 is set to about 0.5 mm.
コイル２は夫々の巻線溝１１内に２巻線ずつ１
列にうず巻状に巻回されている。このコイル２
は、本実施例では例えば各々３回ずつ巻回され、
その線材には例えば0.32mmのポリウレタン線が用
いられている。ここで、前述の如く、巻線溝１１
の幅はこのコイル２の線径0.32mmよりやや広い
0.35mmに設定してあるため、巻線溝１１内では２
巻線のコイル２が１列に交互にうず巻状に巻回さ
れる。そして、その巻始めが割り溝１２より、ま
た巻終りが仮止めされた後外部へ導出される。 The coil 2 has two windings in each winding groove 11.
It is wound in a spiral shape in rows. This coil 2
are wound, for example, three times each in this embodiment,
For example, a 0.32 mm polyurethane wire is used as the wire. Here, as described above, the winding groove 11
The width is slightly wider than the wire diameter of this coil 2, 0.32 mm.
Since it is set to 0.35mm, there are 2 in the winding groove 11.
The coils 2 of the winding are wound in a spiral pattern alternately in one row. Then, the beginning of the winding is led out through the split groove 12, and the end of the winding is temporarily fastened and led out to the outside.
このような構造のバルントランスの巻線作業は
次のように行なわれる。先ず、コア１の巻線溝１
１の各々に割り溝１２より２本の線材が重ねて導
入される。次いで、コア１が３回回転させられて
巻線溝１１内に夫々１対のコイル２が形成され
る。その後、巻終りの仮止めを行つて外部へ導出
する。これで巻線作業は完了し、極めて簡単なも
のとなる。 Winding of a balun transformer having such a structure is carried out as follows. First, winding groove 1 of core 1
Two wire rods are introduced into each of the wire rods 1 from the split groove 12 in an overlapping manner. Next, the core 1 is rotated three times to form each pair of coils 2 in the winding grooves 11. Thereafter, the end of the roll is temporarily secured and the roll is led out. The winding work is now complete and extremely simple.
また、巻回されたコイル２の結線は例えば次の
ように行なわれる。先ず、左側の巻線溝の下層に
巻かれたコイルの巻始め２１を端子ａ、巻終り２
２を端子ｃとする。同様にして、右側の巻線溝の
下層に巻かれたコイルの巻始め２３を端子ｂ、巻
終り２４を端子ｄとする。また、左側の巻線溝の
上層に巻かれたコイルの巻終り２６を端子ｄに接
続し、残つた左側の巻線溝の上層に巻かれたコイ
ルの巻始め２５と右側の巻線溝の上層に巻かれた
コイルの巻始め２７および巻終り２８をまとめて
端子ｃに接続する。これによつて端子ａ−ｂ間の
平衝300Ωと端子ｃ−ｄ間の不平衝75Ωとの変換
用バルントランスが形成される。 Further, the wire connection of the wound coil 2 is performed, for example, as follows. First, connect the winding start 21 of the coil wound in the lower layer of the left winding groove to the terminal a, and the winding end 2
2 is terminal c. Similarly, the winding start 23 of the coil wound in the lower layer of the right winding groove is designated as terminal b, and the winding end 24 is designated as terminal d. Also, connect the winding end 26 of the coil wound on the upper layer of the left winding groove to the terminal d, and connect the winding start 25 of the coil wound on the upper layer of the left winding groove and the right side winding groove. The winding start 27 and winding end 28 of the coil wound on the upper layer are connected together to the terminal c. As a result, a balun transformer for converting between the balance between terminals a and b of 300Ω and the imbalance between terminals c and d of 75Ω is formed.
この様にして結線の完了したバルントランスは
各端子部分をガラス等を用いて固定すれば取扱い
易いものとなる。また、このバルントランスを所
定の位置に接続ピンの植設されたハウジング内に
収容、接続すれば取扱いにはより便利なものとな
り、プリント配線板への自動取付けも可能とな
る。 The balun transformer that has been wired in this manner can be easily handled by fixing each terminal portion using glass or the like. In addition, if this balun transformer is housed and connected in a housing in which connection pins are embedded in predetermined positions, handling becomes more convenient and automatic attachment to a printed wiring board becomes possible.
以上、実施例に基いて詳細に説明したが、本発
明はこれにのみ限定されるものではなく、例え
ば、コアの材質、寸法、あるいはコイルの線種、
巻数、線径等は適宜選択可能なものであり、ま
た、コイルの結線方法にも種々なバリエーシヨン
を含むものである。 Although the present invention has been described in detail based on the examples above, the present invention is not limited thereto.
The number of turns, wire diameter, etc. can be selected as appropriate, and the method of connecting the coils includes various variations.
（発明の効果）
本発明は以上の如く構成され、コイルが円柱形
状のコアの外周面に刻設された巻線溝内に１列の
うず巻状に巻回されるものであるため、巻線作業
は極めて容易なものとなり、自動機を用いての巻
線も可能となる。また、その巻線溝の幅はコイル
の線径よりやや広い程度のものであるため、磁気
抵抗の増加による特性の劣化は比較的少ないもの
であり、メガネ型コアによるバルントランスに比
べても、それほど損色のない特性を得ることがで
きる。また、このようなバルントランスには経時
的な特性の劣化を防止する目的で防湿処理が行な
われるのが一般的であるが、この防湿処理剤中に
フエライト等の磁性体粉末を混入して閉磁路化す
ることによつてその特性を大幅に改善することが
できる。また、巻線溝の幅よりやや細い線材でコ
イルが巻かれるため、極めて均一な巻線となり、
バルントランスとしての諸特性はバラツキの極め
て少ないものとなる。従つて、品質管理上の効果
も絶大なものとなる。(Effects of the Invention) The present invention is configured as described above, and since the coil is wound in a spiral shape in one row in the winding groove carved on the outer peripheral surface of the cylindrical core, Wire work becomes extremely easy, and it becomes possible to wind the wire using an automatic machine. In addition, since the width of the winding groove is slightly wider than the wire diameter of the coil, there is relatively little deterioration in characteristics due to increased magnetic resistance, and compared to a balun transformer with a spectacle-shaped core, It is possible to obtain characteristics without much color loss. In addition, it is common for such balun transformers to undergo moisture-proofing treatment to prevent deterioration of their characteristics over time, but magnetic powder such as ferrite is mixed in this moisture-proofing agent to prevent magnetization Its properties can be greatly improved by converting it into a polyurethane. In addition, since the coil is wound with a wire that is slightly thinner than the width of the winding groove, the winding becomes extremely uniform.
Various characteristics as a balun transformer have extremely little variation. Therefore, the effect on quality control is also great.
第１図はバルントランスの結線の一例を示す回
路図、第２図は本発明の一実施例の正面図、第３
図はその−線断面図、第４図はこれに用いら
れるコアの外観を示す斜視図である。
１……コア、１１……巻線溝、１２……割り
溝、２……コイル。
Fig. 1 is a circuit diagram showing an example of a balun transformer connection, Fig. 2 is a front view of an embodiment of the present invention, and Fig. 3 is a circuit diagram showing an example of a balun transformer connection.
The figure is a cross-sectional view taken along the line 1-2, and FIG. 4 is a perspective view showing the appearance of the core used therein. 1...core, 11...winding groove, 12...dividing groove, 2...coil.
Claims (1)
広い２条の巻線溝が外周面より所定の深さで刻ま
れ、また両端面の各々には、コイルの線径よりや
や広い幅で前記巻線溝に連通する割り溝が設けら
れたコアと、前記巻線溝の各々に２巻線ずつ１列
にうず巻状に巻回され、巻始めが夫々割り溝より
引出されているコイルとを有し、これら各コイル
が適宜結線されて平衝・不平衝およびインピーダ
ンスの変換回路を形成することを特徴とするバル
ントランス。1 It has a cylindrical shape and has two winding grooves that are slightly wider than the wire diameter of the coil carved at a predetermined depth from the outer peripheral surface, and on each of both end faces are grooves that are slightly wider than the wire diameter of the coil. A core provided with a split groove that communicates with the winding groove, and a coil in which each of the winding grooves is wound with two windings in a spiral shape in one row, and the beginning of each winding is drawn out from the split groove. A balun transformer characterized in that each of these coils is appropriately connected to form a balance/unbalance and impedance conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5218384A JPS60196916A (en) | 1984-03-21 | 1984-03-21 | Balun transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5218384A JPS60196916A (en) | 1984-03-21 | 1984-03-21 | Balun transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60196916A JPS60196916A (en) | 1985-10-05 |
| JPH0374015B2 true JPH0374015B2 (en) | 1991-11-25 |
Family
ID=12907687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5218384A Granted JPS60196916A (en) | 1984-03-21 | 1984-03-21 | Balun transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60196916A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007035664A (en) * | 2005-07-22 | 2007-02-08 | Sumida Corporation | Transformer unit |
-
1984
- 1984-03-21 JP JP5218384A patent/JPS60196916A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60196916A (en) | 1985-10-05 |
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