JPWO2010098029A1 - Transformer and assembly method of transformer - Google Patents

Transformer and assembly method of transformer Download PDF

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JPWO2010098029A1
JPWO2010098029A1 JP2010535565A JP2010535565A JPWO2010098029A1 JP WO2010098029 A1 JPWO2010098029 A1 JP WO2010098029A1 JP 2010535565 A JP2010535565 A JP 2010535565A JP 2010535565 A JP2010535565 A JP 2010535565A JP WO2010098029 A1 JPWO2010098029 A1 JP WO2010098029A1
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winding
coil
transformer
secondary winding
insulating material
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JP5177231B2 (en
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芳行 田畑
芳行 田畑
憲和 大崎
憲和 大崎
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures

Abstract

第１の２次巻線（５）は、隣接する第１の２次巻線（５）との間に第１の２次巻線（５）の太さより大きい間隔（５ａ）が空くように巻回され、一方のコイル（Ａ）の第１の２次巻線（５）の間に他方のコイル（Ｂ）の第２の２次巻線（１０）が配置されるように２つのコイル（Ａ、Ｂ）を配置した構成により、変圧器の小型化、薄型化を実現できる。The first secondary winding (5) has an interval (5a) larger than the thickness of the first secondary winding (5) between the adjacent first secondary winding (5). The two coils are wound so that the second secondary winding (10) of the other coil (B) is arranged between the first secondary winding (5) of one coil (A). With the configuration in which (A, B) is arranged, the transformer can be reduced in size and thickness.

Description

本発明は、アーク溶接機などの電気機器に搭載される変圧器および変圧器の組み立て方法に関するものである。   The present invention relates to a transformer mounted on an electric device such as an arc welder and a method for assembling the transformer.

近年、電気機器は、デジタル化や筐体の小型化という流れがあり、電気機器の一例であるアーク溶接機も同様である。   In recent years, there has been a trend toward digitalization and miniaturization of casings in electrical equipment, and the same applies to arc welding machines that are examples of electrical equipment.

アーク溶接機に用いる変圧器のコイルの２次巻線は、数百アンペアの大電流が流れるため、２次巻線の断面積を小さくすることは困難である。従って、２次巻線を分割して並列巻きにする方法や、箔や銅板を並列にして重ねる方法により、２次巻線の断面積を大きくして大電流に対応している。   Since a large current of several hundred amperes flows through the secondary winding of the transformer coil used in the arc welder, it is difficult to reduce the cross-sectional area of the secondary winding. Therefore, the cross-sectional area of the secondary winding is increased to cope with a large current by dividing the secondary winding into a parallel winding or by overlapping a foil or a copper plate in parallel.

このように、アーク溶接機では、２次巻線の断面積を大きくしなければならず、このことは、変圧器の小型化において阻害要因となる。従って、小型化にも限界があり、フェライトコアとすることなどにより鉄心が小型化されても、２次巻線の断面積が小型化されない限り、変圧器全体の小型化が困難であり、アーク溶接機の筐体の小型化も困難となる。   Thus, in the arc welder, the cross-sectional area of the secondary winding must be increased, which is an impediment to downsizing the transformer. Therefore, there is a limit to downsizing, and even if the iron core is downsized by using a ferrite core or the like, it is difficult to downsize the entire transformer unless the cross-sectional area of the secondary winding is downsized. It is difficult to reduce the size of the casing of the welder.

従来の変圧器の一例として、図４に示すように、巻回した２つのコイル１６ａ、１６ｂを向かい合わせにしたロの字型形状のリアクトルや変圧器１７が知られている（例えば、特許文献１参照）。このような変圧器１７では向かい合わせの２つのコイル１６ａ、１６ｂ同士が近くにある構成となっている。   As an example of a conventional transformer, as shown in FIG. 4, a square-shaped reactor or a transformer 17 in which two wound coils 16a and 16b face each other are known (for example, Patent Documents). 1). Such a transformer 17 has a configuration in which the two coils 16a and 16b facing each other are close to each other.

しかし、図４に示す従来の変圧器１７は、コイル１６ａ、１６ｂを構成する２次巻線１８ａ、１８ｂの断面積（高さ、幅）を大きくして大電流に対応している。したがって、大電流の変圧器１７を構成する場合は、コイル１６ａ、１６ｂの高さ（巻厚方向）が大きくなり、向かい合わせのコイル１６ａ、１６ｂ同士がぶつかる。そのため、鉄心１９の空間（窓）を大きくしなければならなかった。   However, the conventional transformer 17 shown in FIG. 4 corresponds to a large current by increasing the cross-sectional areas (height and width) of the secondary windings 18a and 18b constituting the coils 16a and 16b. Accordingly, when the high-current transformer 17 is configured, the height of the coils 16a and 16b (winding direction) increases, and the opposing coils 16a and 16b collide with each other. Therefore, the space (window) of the iron core 19 had to be enlarged.

従って、大電流対応の変圧器では、鉄心１９の空間が必要となるために大型化し、変圧器１７を収納する筐体も大型化するという課題を有していた。   Therefore, the transformer corresponding to a large current has a problem that the space for the iron core 19 is required and the transformer is increased in size, and the housing for storing the transformer 17 is also increased in size.

特開２００７−１７３７００号公報JP 2007-173700 A

本発明は、小型化あるいは薄型化を図ることができる変圧器を提供するものである。   The present invention provides a transformer that can be reduced in size or thickness.

本発明の変圧器は、２つのコイルと２つの鉄心を備えた変圧器であって、コイルは、ボビンと、ボビン上に巻回された第１の巻線と、第１の巻線上に絶縁物を介して巻回された第２の巻線とを備え、第２の巻線は、隣接する第２の巻線との間に第２の巻線の太さより大きい間隔が空くように巻回され、一方のコイルの第２の巻線の間に他方のコイルの第２の巻線が配置されるように２つのコイルを配置した構成を有する。   The transformer of the present invention is a transformer having two coils and two iron cores, and the coil is insulated on the bobbin, the first winding wound on the bobbin, and the first winding. A second winding wound through an object, and the second winding is wound such that a gap larger than the thickness of the second winding is provided between adjacent second windings. The two coils are arranged such that the second winding of the other coil is arranged between the second windings of the other coil.

また、本発明の変圧器の組み立て方法は、２つのコイルと２つの鉄心を備えた変圧器の組み立て方法であって、ボビンに第１の巻線を巻回した後に、第１の巻線上に絶縁物を介して第２の巻線を、隣接する第２の巻線との間に第２の巻線の太さより大きい間隔が空くように巻回して２つのコイルを得るステップと、一方のコイルの第２の巻線の間に他方のコイルの第２の巻線が配置されるように２つのコイルを配置するステップと、２つのボビンの内側の中空部分に２つの鉄心をそれぞれ挿入するステップとを備えた構成を有する。   The transformer assembly method of the present invention is a method of assembling a transformer having two coils and two iron cores, and after winding the first winding around the bobbin, Winding the second winding through an insulator so that the gap between the second winding and the adjacent second winding is larger than the thickness of the second winding to obtain two coils; Arranging two coils so that the second winding of the other coil is disposed between the second windings of the coil, and inserting two iron cores into the hollow portions inside the two bobbins, respectively. And a step.

かかる構成によれば、一方のコイルの第２の巻線を巻回している凸部が、他方のコイルの第２の巻線の間の第２の巻線を巻回していない凹部に配置されるように、２つのコイルを配置しているので、変圧器の小型化、薄型化を実現することができる。   According to this configuration, the convex portion winding the second winding of one coil is disposed in the concave portion not winding the second winding between the second windings of the other coil. As described above, since the two coils are arranged, the transformer can be reduced in size and thickness.

図１Ａは、本発明の実施の形態１における変圧器の概略構成を示す正面図である。FIG. 1A is a front view showing a schematic configuration of a transformer according to Embodiment 1 of the present invention. 図１Ｂは、同変圧器の概略構成を示す下面図である。FIG. 1B is a bottom view showing a schematic configuration of the transformer. 図２Ａは、本発明の実施の形態２における変圧器の概略構成を示す正面図である。FIG. 2A is a front view showing a schematic configuration of the transformer in the second embodiment of the present invention. 図２Ｂは、同変圧器の概略構成を示す下面図である。FIG. 2B is a bottom view showing a schematic configuration of the transformer. 図３Ａは、本発明の実施の形態３における変圧器の概略構成を示す正面図である。FIG. 3A is a front view showing a schematic configuration of the transformer in the third embodiment of the present invention. 図３Ｂは、同変圧器の概略構成を示す下面図である。FIG. 3B is a bottom view showing a schematic configuration of the transformer. 図４は、従来の変圧器の概略構成を示す図である。FIG. 4 is a diagram showing a schematic configuration of a conventional transformer.

（実施の形態１）
本実施の形態の変圧器について、図１Ａ、図１Ｂを用いて説明する。図１Ａは変圧器の概略構成を示す正面図であり、図１Ｂは同変圧器の概略構成を示す下面図である。図１Ａ、図１Ｂに示す変圧器２０は、鉄心１と２つのコイルＡ、Ｂから構成されている。そして、２つのコイルＡ、Ｂのうち一方のコイルＡは、鉄心１を挿入できる中空部分を持った第１のボビン２と、第１のボビン２の上に巻かれた第１の１次巻線（第１の巻線）３と、絶縁材４を介して第１の１次巻線３の上に巻かれた第１の２次巻線（第２の巻線）５から構成されている。(Embodiment 1)
The transformer of this embodiment will be described with reference to FIGS. 1A and 1B. FIG. 1A is a front view showing a schematic configuration of the transformer, and FIG. 1B is a bottom view showing a schematic configuration of the transformer. A transformer 20 shown in FIGS. 1A and 1B includes an iron core 1 and two coils A and B. One coil A of the two coils A and B includes a first bobbin 2 having a hollow portion into which the iron core 1 can be inserted, and a first primary winding wound on the first bobbin 2. It is composed of a wire (first winding) 3 and a first secondary winding (second winding) 5 wound on the first primary winding 3 via an insulating material 4. Yes.

また、他方のコイルＢは、鉄心１を挿入できる中空部分を持った第２のボビン７と、第２のボビン７の上に巻かれた第２の１次巻線（第１の巻線）８と、絶縁材９を介して第２の１次巻線８の上に巻かれた第２の２次巻線（第２の巻線）１０から構成されている。一方のコイルＡと他方のコイルＢとの間には、絶縁材６と絶縁材１１が設けられている。なお、絶縁材６や絶縁材１１の例としては、ノーメックスシート（デュポン社の登録商標）等が挙げられる。   The other coil B includes a second bobbin 7 having a hollow portion into which the iron core 1 can be inserted, and a second primary winding (first winding) wound on the second bobbin 7. 8 and a second secondary winding (second winding) 10 wound on the second primary winding 8 via an insulating material 9. An insulating material 6 and an insulating material 11 are provided between one coil A and the other coil B. Examples of the insulating material 6 and the insulating material 11 include Nomex sheets (registered trademark of DuPont).

なお、鉄心１は、略Π字状（Π字状を含む）に分割された２つの部分（図１Ａでは上下の部分）からなり、これらを第１のボビン２および第２のボビン７の中空部分の内部で突き合わせて鉄心１を構成するようにしても良い。また、略コの字状と略Ｉの字状（Ｉの字状を含む）の２つの部分からなり、略コの字の部分を第１のボビン２および第２のボビン７に挿通して略Ｉの字の部分と突き合わせて鉄心１を構成するようにしても良い。   The iron core 1 is composed of two parts (upper and lower parts in FIG. 1A) that are divided into a substantially square shape (including the square shape), and these are the hollow portions of the first bobbin 2 and the second bobbin 7. You may make it comprise the iron core 1 by abutting inside a part. Further, it consists of two parts, a substantially U-shape and a substantially I-shape (including the I-shape), and the substantially U-shape is inserted into the first bobbin 2 and the second bobbin 7. You may make it comprise the iron core 1 in face-to-face with the substantially I-shaped part.

以上のように構成された変圧器について、その組み立て方法を説明する。第１の１次巻線３を第１のボビン２の上に一列に巻く。第１の１次巻線３を巻き終わった上に絶縁材４を固定する。絶縁材４の上に、第１の２次巻線５を、第１の２次巻線５の太さより大きい間隔５ａを空けて等間隔に一列に巻く。これを第１のコイルＡとする。   A method of assembling the transformer configured as described above will be described. The first primary winding 3 is wound in a row on the first bobbin 2. The insulating material 4 is fixed after the first primary winding 3 has been wound. On the insulating material 4, the first secondary winding 5 is wound in a line at equal intervals with an interval 5 a larger than the thickness of the first secondary winding 5. This is the first coil A.

また、第２の１次巻線８を第２のボビン７の上に一列に巻く。第２の１次巻線８を巻き終わった上に絶縁材９を固定する。絶縁材９の上に、第２の２次巻線１０を、第２の２次巻線１０の太さより大きい間隔１０ａを空けて等間隔に一列に巻く。これを第２のコイルＢとする。   In addition, the second primary winding 8 is wound on the second bobbin 7 in a row. After the second primary winding 8 is wound, the insulating material 9 is fixed. On the insulating material 9, the second secondary winding 10 is wound in a line at equal intervals with an interval 10 a larger than the thickness of the second secondary winding 10. This is the second coil B.

なお、第１のコイルＡと第２のコイルＢにおいて、２次巻線５、１０が巻かれている箇所は凸部５ｂ、１０ｂとなっており、２次巻線５、１０が巻かれていない箇所（隣接する２次巻線５同士の間、２次巻線１０同士の間）は凹部５ｃ、１０ｃとなっている。なお、凹部５ｃ、１０ｃの底部は、絶縁材４あるいは絶縁材９が設けられている。   In the first coil A and the second coil B, the portions where the secondary windings 5 and 10 are wound are convex portions 5b and 10b, and the secondary windings 5 and 10 are wound. The portions (between adjacent secondary windings 5 and between secondary windings 10) are not formed in the recesses 5c and 10c. In addition, the insulating material 4 or the insulating material 9 is provided in the bottom part of the recessed parts 5c and 10c.

その後、第１のコイルＡを構成する第１の２次巻線５の等間隔の凸部５ｂ（第１の２次巻線５）が、第２のコイルＢを構成する第２の２次巻線１０の等間隔の凹部１０ｃ（隣接する第２の２次巻線１０の間）に配置されるように、また、第２のコイルＢを構成する第２の２次巻線１０の等間隔の凸部１０ｂ（第２の２次巻線１０）が、第１のコイルＡを構成する第１の２次巻線５の等間隔の凹部５ｃ（隣接する第１の２次巻線５の間）に配置されるように、第１のコイルＡと第２のコイルＢを配置する。   Thereafter, the convex portions 5 b (first secondary winding 5) of the first secondary winding 5 constituting the first coil A are arranged in the second secondary constituting the second coil B. The second secondary windings 10 constituting the second coil B are arranged so as to be arranged in the recesses 10c (between the adjacent second secondary windings 10) of the windings 10 at equal intervals. The spaced convex portions 10b (second secondary windings 10) are equidistant concave portions 5c (adjacent first secondary windings 5) of the first secondary windings 5 constituting the first coil A. 1st coil A and 2nd coil B are arrange | positioned so that it may arrange | position between.

また、第１のコイルＡを構成する第１の２次巻線５の、第２のコイルＢを構成する第２の２次巻線１０との対向部に絶縁材６を配置する。絶縁材６は、第１の２次巻線５と第２の２次巻線１０の間を絶縁する役割を有している。形状はシート状であり、第１の２次巻線５の凹凸部５ｂ、５ｃに沿うような形の折り目がつけられている。   Further, the insulating material 6 is disposed in a portion of the first secondary winding 5 constituting the first coil A facing the second secondary winding 10 constituting the second coil B. The insulating material 6 has a role of insulating between the first secondary winding 5 and the second secondary winding 10. The shape is a sheet shape, and a crease is formed along the concave and convex portions 5 b and 5 c of the first secondary winding 5.

また、第２のコイルＢを構成する第２の２次巻線１０の、第１のコイルＡを構成する第１の２次巻線５との対向部に絶縁材１１を配置する。絶縁材１１は、第２の２次巻線１０と第１の２次巻線５の間を絶縁する役割を有している。形状はシート状であり、第２の２次巻線１０の凹凸部１０ｂ、１０ｃに沿うような形の折り目がつけられている。   In addition, an insulating material 11 is disposed in a portion of the second secondary winding 10 constituting the second coil B facing the first secondary winding 5 constituting the first coil A. The insulating material 11 has a role of insulating between the second secondary winding 10 and the first secondary winding 5. The shape is a sheet shape, and a crease is formed along the concave and convex portions 10 b and 10 c of the second secondary winding 10.

すなわち、一方のコイルＡの第１の２次巻線５を巻回している凸部５ｂが、他方のコイルＢの第２の２次巻線１０を巻回していない凹部１０ｃに配置される箇所に、絶縁材６を配置している。また、他方のコイルＢの第１の２次巻線１０を巻回している凸部１０ｂが、一方のコイルＡの第２の２次巻線５を巻回していない凹部５ｃに配置される箇所に、絶縁材１１を配置している。本実施の形態では、２個の絶縁材６、１１を用いて説明したが、１個の絶縁材を用いてもよい。   That is, the portion where the convex portion 5b around which the first secondary winding 5 of one coil A is wound is disposed in the concave portion 10c where the second secondary winding 10 of the other coil B is not wound. Further, an insulating material 6 is disposed. Further, the portion where the convex portion 10b around which the first secondary winding 10 of the other coil B is wound is disposed in the concave portion 5c where the second secondary winding 5 of one coil A is not wound. Further, an insulating material 11 is arranged. In this embodiment, the two insulating materials 6 and 11 have been described. However, one insulating material may be used.

その後、第１のコイルＡと第２のコイルＢを上記のように配置した状態で、２つに分割された鉄心１を第１のボビン２と第２のボビン７の中空部分の内側に挿入して、２つに分割された鉄心１を中空部分で突き合わせ、突き合わせ部を接着する。   After that, with the first coil A and the second coil B arranged as described above, the iron core 1 divided into two is inserted inside the hollow portions of the first bobbin 2 and the second bobbin 7. Then, the iron core 1 divided into two is butted at the hollow portion, and the butted portion is bonded.

なお、２つに分割された鉄心１の固定は、接着剤での固定に限るものではなく、ネジとナットと金具の組み合わせによる固定や、バンドによる固定など、固定方法としては種々の方法が考えられる。   The fixing of the iron core 1 divided into two parts is not limited to fixing with an adhesive, and various fixing methods such as fixing with a combination of screws, nuts and metal fittings, and fixing with a band are considered. It is done.

また、巻線の形状は、丸線、平角線、リッツ線など箔形状以外ならどのような断面形状でもよく、さらに、１本でなく２本、３本など複数本を並列にするようにしてもよい。   The winding may have any cross-sectional shape other than a foil shape such as a round wire, a rectangular wire, or a litz wire, and a plurality of wires such as two or three instead of one may be arranged in parallel. Also good.

以上のように、本実施の形態における変圧器によれば、空間の有効利用ができ、変圧器の小型化、薄型化が可能である。   As described above, according to the transformer in the present embodiment, space can be effectively used, and the transformer can be reduced in size and thickness.

また、２次巻線５、１０のほとんどが変圧器２０の表面に配置されているため、冷却ファンなどによる空冷の冷却効果が期待される。   Moreover, since most of the secondary windings 5 and 10 are disposed on the surface of the transformer 20, an air cooling effect by a cooling fan or the like is expected.

このように、本実施の形態によれば、冷却効率のよい小型化、薄型化が可能な変圧器を実現することができる。   Thus, according to this embodiment, it is possible to realize a transformer that can be reduced in size and thickness with good cooling efficiency.

（実施の形態２）
本実施の形態において、実施の形態１と同様の構成については同一の番号を付して詳細な説明を省略する。実施の形態１と異なる点は、第１のコイルＡと第２のコイルＢとの間に設けられる絶縁材の形状である。(Embodiment 2)
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. The difference from the first embodiment is the shape of the insulating material provided between the first coil A and the second coil B.

図２Ａ、図２Ｂを用いて、本実施の形態の変圧器について説明する。図２Ａ、図２Ｂの変圧器３０において、第１のコイルＡと第２のコイルＢの構造および配置は、実施の形態１と同様である。第１のコイルＡと第２のコイルＢとの間には、絶縁材１２と絶縁材１３が設けられている。   The transformer according to the present embodiment will be described with reference to FIGS. 2A and 2B. 2A and 2B, the structure and arrangement of the first coil A and the second coil B are the same as those in the first embodiment. Between the first coil A and the second coil B, an insulating material 12 and an insulating material 13 are provided.

絶縁材１２は、第１の２次巻線５の、第２の２次巻線１０との対向部を絶縁する役割を有し、形状はシート状であり、折り目はない。また、絶縁材１３は、第２の２次巻線１０の、第１の２次巻線５との対向部を絶縁する役割を有し、形状はシート状であり、折り目はない。   The insulating material 12 has a role of insulating the facing portion of the first secondary winding 5 and the second secondary winding 10, has a sheet shape, and has no folds. Moreover, the insulating material 13 has a role which insulates the opposing part with the 1st secondary winding 5 of the 2nd secondary winding 10, a shape is a sheet form, and there is no crease | fold.

なお、鉄心１の組み立てや構成、巻線の状態などは、実施の形態１と同様である。また、絶縁材１２や絶縁材１３の例としては、ノーメックスシート等が挙げられる。   The assembly and configuration of the iron core 1 and the state of the winding are the same as in the first embodiment. Examples of the insulating material 12 and the insulating material 13 include a nomex sheet.

本実施の形態では、第１のコイルＡと第２のコイルＢの間に、折り目がない絶縁材１２、１３を挟み込むことで、絶縁材１２や絶縁材１３を、第１のコイルＡの第１の２次巻線５の凹凸部５ｂ、５ｃや第２のコイルＢの第２の２次巻線１０の凹凸部１０ｂ、１０ｃに合わせて沿わせることができる。   In the present embodiment, the insulating materials 12 and 13 having no folds are sandwiched between the first coil A and the second coil B, so that the insulating material 12 and the insulating material 13 are attached to the first coil A in the first coil A. The concave and convex portions 5b and 5c of the first secondary winding 5 and the concave and convex portions 10b and 10c of the second secondary winding 10 of the second coil B can be aligned.

以上のように、本実施の形態によれば、実施の形態１と同様の効果を実現することができる。本実施の形態では、２個の絶縁材１２、１３を用いて説明したが、１個の絶縁材を用いてもよい。   As described above, according to the present embodiment, the same effect as in the first embodiment can be realized. In this embodiment, the two insulating materials 12 and 13 have been described. However, one insulating material may be used.

（実施の形態３）
本実施の形態において、実施の形態１と同様の構成については同一の番号を付して詳細な説明を省略する。実施の形態１と異なるのは、第１のコイルＡと第２のコイルＢとの間を絶縁材でモールドするようにした点である。さらに、第２のコイルＢの巻き線方向は、実施の形態１、２とは異ならせている。(Embodiment 3)
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. The difference from the first embodiment is that the space between the first coil A and the second coil B is molded with an insulating material. Further, the winding direction of the second coil B is different from those of the first and second embodiments.

図３Ａ、図３Ｂを用いて、本実施の形態の変圧器について説明する。図３Ａ、図３Ｂの変圧器４０において、第１のコイルＡと第２のコイルＢの構造および配置は、実施の形態１と同様である。   The transformer according to the present embodiment will be described with reference to FIGS. 3A and 3B. 3A and 3B, the structure and arrangement of the first coil A and the second coil B are the same as those in the first embodiment.

本実施の形態では、第１のコイルＡを構成する凹凸形状を有する第１の２次巻線５と、第２のコイルＢを構成する凹凸部形状を有する第２の２次巻線１０との間、すなわち一方の凸部５ｂ、１０ｂと他方の凹部１０ｃ、５ｃとの間に、モールド絶縁材１４を充填して硬化させている。モールド絶縁材１４により、第１の２次巻線５と第２の２次巻線１０の位置を固定することができる。また、第１の２次巻線５と第２の２次巻線１０との間の絶縁を行うこともできる。鉄心１の組み立てや構成、巻線の状態などは、実施の形態１と同様である。なお、モールド絶縁材１４としては、例えば、エポキシ樹脂等が挙げられる。   In the present embodiment, a first secondary winding 5 having a concavo-convex shape constituting the first coil A, and a second secondary winding 10 having a concavo-convex shape constituting the second coil B, In other words, the mold insulating material 14 is filled and cured between the convex portions 5b and 10b and the concave portions 10c and 5c. The positions of the first secondary winding 5 and the second secondary winding 10 can be fixed by the mold insulating material 14. In addition, insulation between the first secondary winding 5 and the second secondary winding 10 can be performed. The assembly and configuration of the iron core 1 and the state of the winding are the same as in the first embodiment. In addition, as the mold insulating material 14, an epoxy resin etc. are mentioned, for example.

本実施の形態では、第２のコイルＢの巻き線方向を、実施の形態１、２とは異ならせている。しかし、本実施の形態においても、一方の凸部５ｂ、１０ｂが他方の凹部１０ｃ、５ｃに配置されるように、隣接する第１の２次巻線５の間、および隣接する第２の２次巻線１０の間の間隔を、第１の２次巻線５および第２の２次巻線１０の太さよりも大きくすればよい。   In the present embodiment, the winding direction of the second coil B is different from those of the first and second embodiments. However, also in the present embodiment, between the adjacent first secondary windings 5 and adjacent second 2 so that one convex portion 5b, 10b is disposed in the other concave portion 10c, 5c. What is necessary is just to make the space | interval between the secondary windings 10 larger than the thickness of the 1st secondary winding 5 and the 2nd secondary winding 10. FIG.

以上のように、本実施の形態によれば、実施の形態１、２と同様の効果を実現することができる。また、実施の形態１、２と比べて、第１のコイルＡと第２のコイルＢとの固定や第１のコイルＡと第２のコイルＢとの間の絶縁をより確実に行うことができる。   As described above, according to the present embodiment, it is possible to achieve the same effect as in the first and second embodiments. In addition, as compared with the first and second embodiments, the first coil A and the second coil B can be fixed and the insulation between the first coil A and the second coil B can be more reliably performed. it can.

本発明の変圧器は、２次巻線の断面積を大きくしても、小型化、薄型化を実現することができるので、特に２次電流の大きなアーク溶接機などに用いる変圧器として有用である。   Since the transformer of the present invention can be reduced in size and thickness even if the cross-sectional area of the secondary winding is increased, it is particularly useful as a transformer used in an arc welding machine having a large secondary current. is there.

１ 鉄心
２ 第１のボビン
３ 第１の１次巻線
４，６，９，１１，１２，１３ 絶縁材
５ 第１の２次巻線
５ａ，１０ａ 間隔
５ｂ，１０ｂ 凸部
５ｃ，１０ｃ 凹部
７ 第２のボビン
８ 第２の１次巻線
１０ 第２の２次巻線
１４ モールド絶縁材
２０，３０，４０ 変圧器DESCRIPTION OF SYMBOLS 1 Iron core 2 1st bobbin 3 1st primary winding 4, 6, 9, 11, 12, 13 Insulation material 5 1st secondary winding 5a, 10a Space | interval 5b, 10b Convex part 5c, 10c Concave part 7 Second bobbin 8 Second primary winding 10 Second secondary winding 14 Mold insulation 20, 30, 40 Transformer

本発明は、アーク溶接機などの電気機器に搭載される変圧器および変圧器の組み立て方法に関するものである。   The present invention relates to a transformer mounted on an electric device such as an arc welder and a method for assembling the transformer.

近年、電気機器は、デジタル化や筐体の小型化という流れがあり、電気機器の一例であるアーク溶接機も同様である。   In recent years, there has been a trend toward digitalization and miniaturization of casings in electrical equipment, and the same applies to arc welding machines that are examples of electrical equipment.

アーク溶接機に用いる変圧器のコイルの２次巻線は、数百アンペアの大電流が流れるため、２次巻線の断面積を小さくすることは困難である。従って、２次巻線を分割して並列巻きにする方法や、箔や銅板を並列にして重ねる方法により、２次巻線の断面積を大きくして大電流に対応している。   Since a large current of several hundred amperes flows through the secondary winding of the transformer coil used in the arc welder, it is difficult to reduce the cross-sectional area of the secondary winding. Therefore, the cross-sectional area of the secondary winding is increased to cope with a large current by dividing the secondary winding into a parallel winding or by overlapping a foil or a copper plate in parallel.

このように、アーク溶接機では、２次巻線の断面積を大きくしなければならず、このことは、変圧器の小型化において阻害要因となる。従って、小型化にも限界があり、フェライトコアとすることなどにより鉄心が小型化されても、２次巻線の断面積が小型化されない限り、変圧器全体の小型化が困難であり、アーク溶接機の筐体の小型化も困難となる。   Thus, in the arc welder, the cross-sectional area of the secondary winding must be increased, which is an impediment to downsizing the transformer. Therefore, there is a limit to downsizing, and even if the iron core is downsized by using a ferrite core or the like, it is difficult to downsize the entire transformer unless the cross-sectional area of the secondary winding is downsized. It is difficult to reduce the size of the casing of the welder.

従来の変圧器の一例として、図４に示すように、巻回した２つのコイル１６ａ、１６ｂを向かい合わせにしたロの字型形状のリアクトルや変圧器１７が知られている（例えば、特許文献１参照）。このような変圧器１７では向かい合わせの２つのコイル１６ａ、１６ｂ同士が近くにある構成となっている。   As an example of a conventional transformer, as shown in FIG. 4, a square-shaped reactor or a transformer 17 in which two wound coils 16a and 16b face each other are known (for example, Patent Documents). 1). Such a transformer 17 has a configuration in which the two coils 16a and 16b facing each other are close to each other.

しかし、図４に示す従来の変圧器１７は、コイル１６ａ、１６ｂを構成する２次巻線１８ａ、１８ｂの断面積（高さ、幅）を大きくして大電流に対応している。したがって、大電流の変圧器１７を構成する場合は、コイル１６ａ、１６ｂの高さ（巻厚方向）が大きくなり、向かい合わせのコイル１６ａ、１６ｂ同士がぶつかる。そのため、鉄心１９の空間（窓）を大きくしなければならなかった。   However, the conventional transformer 17 shown in FIG. 4 corresponds to a large current by increasing the cross-sectional areas (height and width) of the secondary windings 18a and 18b constituting the coils 16a and 16b. Accordingly, when the high-current transformer 17 is configured, the height of the coils 16a and 16b (winding direction) increases, and the opposing coils 16a and 16b collide with each other. Therefore, the space (window) of the iron core 19 had to be enlarged.

従って、大電流対応の変圧器では、鉄心１９の空間が必要となるために大型化し、変圧器１７を収納する筐体も大型化するという課題を有していた。   Therefore, the transformer corresponding to a large current has a problem that the space for the iron core 19 is required and the transformer is increased in size, and the housing for storing the transformer 17 is also increased in size.

特開２００７−１７３７００号公報JP 2007-173700 A

本発明は、小型化あるいは薄型化を図ることができる変圧器を提供するものである。   The present invention provides a transformer that can be reduced in size or thickness.

本発明の変圧器は、２つのコイルと２つの鉄心を備えた変圧器であって、コイルは、ボビンと、ボビン上に巻回された第１の巻線と、第１の巻線上に絶縁物を介して巻回された第２の巻線とを備え、第２の巻線は、隣接する第２の巻線との間に第２の巻線の太さより大きい間隔が空くように巻回され、一方のコイルの第２の巻線の間に他方のコイルの第２の巻線が配置されるように２つのコイルを配置した構成を有する。   The transformer of the present invention is a transformer having two coils and two iron cores, and the coil is insulated on the bobbin, the first winding wound on the bobbin, and the first winding. A second winding wound through an object, and the second winding is wound such that a gap larger than the thickness of the second winding is provided between adjacent second windings. The two coils are arranged such that the second winding of the other coil is arranged between the second windings of the other coil.

また、本発明の変圧器の組み立て方法は、２つのコイルと２つの鉄心を備えた変圧器の組み立て方法であって、ボビンに第１の巻線を巻回した後に、第１の巻線上に絶縁物を介して第２の巻線を、隣接する第２の巻線との間に第２の巻線の太さより大きい間隔が空くように巻回して２つのコイルを得るステップと、一方のコイルの第２の巻線の間に他方のコイルの第２の巻線が配置されるように２つのコイルを配置するステップと、２つのボビンの内側の中空部分に２つの鉄心をそれぞれ挿入するステップとを備えた構成を有する。   The transformer assembly method of the present invention is a method of assembling a transformer having two coils and two iron cores, and after winding the first winding around the bobbin, Winding the second winding through an insulator so that the gap between the second winding and the adjacent second winding is larger than the thickness of the second winding to obtain two coils; Arranging two coils so that the second winding of the other coil is disposed between the second windings of the coil, and inserting two iron cores into the hollow portions inside the two bobbins, respectively. And a step.

かかる構成によれば、一方のコイルの第２の巻線を巻回している凸部が、他方のコイルの第２の巻線の間の第２の巻線を巻回していない凹部に配置されるように、２つのコイルを配置しているので、変圧器の小型化、薄型化を実現することができる。   According to this configuration, the convex portion winding the second winding of one coil is disposed in the concave portion not winding the second winding between the second windings of the other coil. As described above, since the two coils are arranged, the transformer can be reduced in size and thickness.

本発明の実施の形態１における変圧器の概略構成を示す正面図The front view which shows schematic structure of the transformer in Embodiment 1 of this invention 同変圧器の概略構成を示す下面図Bottom view showing the schematic configuration of the transformer 本発明の実施の形態２における変圧器の概略構成を示す正面図The front view which shows schematic structure of the transformer in Embodiment 2 of this invention 同変圧器の概略構成を示す下面図Bottom view showing the schematic configuration of the transformer 本発明の実施の形態３における変圧器の概略構成を示す正面図The front view which shows schematic structure of the transformer in Embodiment 3 of this invention 同変圧器の概略構成を示す下面図Bottom view showing the schematic configuration of the transformer 従来の変圧器の概略構成を示す図The figure which shows schematic structure of the conventional transformer

（実施の形態１）
本実施の形態の変圧器について、図１Ａ、図１Ｂを用いて説明する。図１Ａは変圧器の概略構成を示す正面図であり、図１Ｂは同変圧器の概略構成を示す下面図である。図１Ａ、図１Ｂに示す変圧器２０は、鉄心１と２つのコイルＡ、Ｂから構成されている。そして、２つのコイルＡ、Ｂのうち一方のコイルＡは、鉄心１を挿入できる中空部分を持った第１のボビン２と、第１のボビン２の上に巻かれた第１の１次巻線（第１の巻線）３と、絶縁材４を介して第１の１次巻線３の上に巻かれた第１の２次巻線（第２の巻線）５から構成されている。 (Embodiment 1)
The transformer of this embodiment will be described with reference to FIGS. 1A and 1B. FIG. 1A is a front view showing a schematic configuration of the transformer, and FIG. 1B is a bottom view showing a schematic configuration of the transformer. A transformer 20 shown in FIGS. 1A and 1B includes an iron core 1 and two coils A and B. One coil A of the two coils A and B includes a first bobbin 2 having a hollow portion into which the iron core 1 can be inserted, and a first primary winding wound on the first bobbin 2. It is composed of a wire (first winding) 3 and a first secondary winding (second winding) 5 wound on the first primary winding 3 via an insulating material 4. Yes.

また、他方のコイルＢは、鉄心１を挿入できる中空部分を持った第２のボビン７と、第２のボビン７の上に巻かれた第２の１次巻線（第１の巻線）８と、絶縁材９を介して第２の１次巻線８の上に巻かれた第２の２次巻線（第２の巻線）１０から構成されている。一方のコイルＡと他方のコイルＢとの間には、絶縁材６と絶縁材１１が設けられている。なお、絶縁材６や絶縁材１１の例としては、ノーメックスシート（デュポン社の登録商標）等が挙げられる。   The other coil B includes a second bobbin 7 having a hollow portion into which the iron core 1 can be inserted, and a second primary winding (first winding) wound on the second bobbin 7. 8 and a second secondary winding (second winding) 10 wound on the second primary winding 8 via an insulating material 9. An insulating material 6 and an insulating material 11 are provided between one coil A and the other coil B. Examples of the insulating material 6 and the insulating material 11 include Nomex sheets (registered trademark of DuPont).

なお、鉄心１は、略Π字状（Π字状を含む）に分割された２つの部分（図１Ａでは上下の部分）からなり、これらを第１のボビン２および第２のボビン７の中空部分の内部で突き合わせて鉄心１を構成するようにしても良い。また、略コの字状と略Ｉの字状（Ｉの字状を含む）の２つの部分からなり、略コの字の部分を第１のボビン２および第２のボビン７に挿通して略Ｉの字の部分と突き合わせて鉄心１を構成するようにしても良い。   The iron core 1 is composed of two parts (upper and lower parts in FIG. 1A) that are divided into a substantially square shape (including the square shape), and these are the hollow portions of the first bobbin 2 and the second bobbin 7. You may make it comprise the iron core 1 by abutting inside a part. Further, it consists of two parts, a substantially U-shape and a substantially I-shape (including the I-shape), and the substantially U-shape is inserted into the first bobbin 2 and the second bobbin 7. You may make it comprise the iron core 1 in face-to-face with the substantially I-shaped part.

以上のように構成された変圧器について、その組み立て方法を説明する。第１の１次巻線３を第１のボビン２の上に一列に巻く。第１の１次巻線３を巻き終わった上に絶縁材４を固定する。絶縁材４の上に、第１の２次巻線５を、第１の２次巻線５の太さより大きい間隔５ａを空けて等間隔に一列に巻く。これを第１のコイルＡとする。   A method of assembling the transformer configured as described above will be described. The first primary winding 3 is wound in a row on the first bobbin 2. The insulating material 4 is fixed after the first primary winding 3 has been wound. On the insulating material 4, the first secondary winding 5 is wound in a line at equal intervals with an interval 5 a larger than the thickness of the first secondary winding 5. This is the first coil A.

また、第２の１次巻線８を第２のボビン７の上に一列に巻く。第２の１次巻線８を巻き終わった上に絶縁材９を固定する。絶縁材９の上に、第２の２次巻線１０を、第２の２次巻線１０の太さより大きい間隔１０ａを空けて等間隔に一列に巻く。これを第２のコイルＢとする。   In addition, the second primary winding 8 is wound on the second bobbin 7 in a row. After the second primary winding 8 is wound, the insulating material 9 is fixed. On the insulating material 9, the second secondary winding 10 is wound in a line at equal intervals with an interval 10 a larger than the thickness of the second secondary winding 10. This is the second coil B.

なお、第１のコイルＡと第２のコイルＢにおいて、２次巻線５、１０が巻かれている箇所は凸部５ｂ、１０ｂとなっており、２次巻線５、１０が巻かれていない箇所（隣接する２次巻線５同士の間、２次巻線１０同士の間）は凹部５ｃ、１０ｃとなっている。なお、凹部５ｃ、１０ｃの底部は、絶縁材４あるいは絶縁材９が設けられている。   In the first coil A and the second coil B, the portions where the secondary windings 5 and 10 are wound are convex portions 5b and 10b, and the secondary windings 5 and 10 are wound. The portions (between adjacent secondary windings 5 and between secondary windings 10) are not formed in the recesses 5c and 10c. In addition, the insulating material 4 or the insulating material 9 is provided in the bottom part of the recessed parts 5c and 10c.

その後、第１のコイルＡを構成する第１の２次巻線５の等間隔の凸部５ｂ（第１の２次巻線５）が、第２のコイルＢを構成する第２の２次巻線１０の等間隔の凹部１０ｃ（隣接する第２の２次巻線１０の間）に配置されるように、また、第２のコイルＢを構成する第２の２次巻線１０の等間隔の凸部１０ｂ（第２の２次巻線１０）が、第１のコイルＡを構成する第１の２次巻線５の等間隔の凹部５ｃ（隣接する第１の２次巻線５の間）に配置されるように、第１のコイルＡと第２のコイルＢを配置する。   Thereafter, the convex portions 5 b (first secondary winding 5) of the first secondary winding 5 constituting the first coil A are arranged in the second secondary constituting the second coil B. The second secondary windings 10 constituting the second coil B are arranged so as to be arranged in the recesses 10c (between the adjacent second secondary windings 10) of the windings 10 at equal intervals. The spaced convex portions 10b (second secondary windings 10) are equidistant concave portions 5c (adjacent first secondary windings 5) of the first secondary windings 5 constituting the first coil A. 1st coil A and 2nd coil B are arrange | positioned so that it may arrange | position between.

また、第１のコイルＡを構成する第１の２次巻線５の、第２のコイルＢを構成する第２の２次巻線１０との対向部に絶縁材６を配置する。絶縁材６は、第１の２次巻線５と第２の２次巻線１０の間を絶縁する役割を有している。形状はシート状であり、第１の２次巻線５の凹凸部５ｂ、５ｃに沿うような形の折り目がつけられている。   Further, the insulating material 6 is disposed in a portion of the first secondary winding 5 constituting the first coil A facing the second secondary winding 10 constituting the second coil B. The insulating material 6 has a role of insulating between the first secondary winding 5 and the second secondary winding 10. The shape is a sheet shape, and a crease is formed along the concave and convex portions 5 b and 5 c of the first secondary winding 5.

また、第２のコイルＢを構成する第２の２次巻線１０の、第１のコイルＡを構成する第１の２次巻線５との対向部に絶縁材１１を配置する。絶縁材１１は、第２の２次巻線１０と第１の２次巻線５の間を絶縁する役割を有している。形状はシート状であり、第２の２次巻線１０の凹凸部１０ｂ、１０ｃに沿うような形の折り目がつけられている。   In addition, an insulating material 11 is disposed in a portion of the second secondary winding 10 constituting the second coil B facing the first secondary winding 5 constituting the first coil A. The insulating material 11 has a role of insulating between the second secondary winding 10 and the first secondary winding 5. The shape is a sheet shape, and a crease is formed along the concave and convex portions 10 b and 10 c of the second secondary winding 10.

すなわち、一方のコイルＡの第１の２次巻線５を巻回している凸部５ｂが、他方のコイルＢの第２の２次巻線１０を巻回していない凹部１０ｃに配置される箇所に、絶縁材６を配置している。また、他方のコイルＢの第１の２次巻線１０を巻回している凸部１０ｂが、一方のコイルＡの第２の２次巻線５を巻回していない凹部５ｃに配置される箇所に、絶縁材１１を配置している。本実施の形態では、２個の絶縁材６、１１を用いて説明したが、１個の絶縁材を用いてもよい。   That is, the portion where the convex portion 5b around which the first secondary winding 5 of one coil A is wound is disposed in the concave portion 10c where the second secondary winding 10 of the other coil B is not wound. Further, an insulating material 6 is disposed. Further, the portion where the convex portion 10b around which the first secondary winding 10 of the other coil B is wound is disposed in the concave portion 5c where the second secondary winding 5 of one coil A is not wound. Further, an insulating material 11 is arranged. In this embodiment, the two insulating materials 6 and 11 have been described. However, one insulating material may be used.

その後、第１のコイルＡと第２のコイルＢを上記のように配置した状態で、２つに分割された鉄心１を第１のボビン２と第２のボビン７の中空部分の内側に挿入して、２つに分割された鉄心１を中空部分で突き合わせ、突き合わせ部を接着する。   After that, with the first coil A and the second coil B arranged as described above, the iron core 1 divided into two is inserted inside the hollow portions of the first bobbin 2 and the second bobbin 7. Then, the iron core 1 divided into two is butted at the hollow portion, and the butted portion is bonded.

なお、２つに分割された鉄心１の固定は、接着剤での固定に限るものではなく、ネジとナットと金具の組み合わせによる固定や、バンドによる固定など、固定方法としては種々の方法が考えられる。   The fixing of the iron core 1 divided into two parts is not limited to fixing with an adhesive, and various fixing methods such as fixing with a combination of screws, nuts and metal fittings, and fixing with a band are considered. It is done.

また、巻線の形状は、丸線、平角線、リッツ線など箔形状以外ならどのような断面形状でもよく、さらに、１本でなく２本、３本など複数本を並列にするようにしてもよい。   The winding may have any cross-sectional shape other than a foil shape such as a round wire, a rectangular wire, or a litz wire, and a plurality of wires such as two or three instead of one may be arranged in parallel. Also good.

以上のように、本実施の形態における変圧器によれば、空間の有効利用ができ、変圧器の小型化、薄型化が可能である。   As described above, according to the transformer in the present embodiment, space can be effectively used, and the transformer can be reduced in size and thickness.

また、２次巻線５、１０のほとんどが変圧器２０の表面に配置されているため、冷却ファンなどによる空冷の冷却効果が期待される。   Moreover, since most of the secondary windings 5 and 10 are disposed on the surface of the transformer 20, an air cooling effect by a cooling fan or the like is expected.

このように、本実施の形態によれば、冷却効率のよい小型化、薄型化が可能な変圧器を実現することができる。   Thus, according to this embodiment, it is possible to realize a transformer that can be reduced in size and thickness with good cooling efficiency.

（実施の形態２）
本実施の形態において、実施の形態１と同様の構成については同一の番号を付して詳細な説明を省略する。実施の形態１と異なる点は、第１のコイルＡと第２のコイルＢとの間に設けられる絶縁材の形状である。 (Embodiment 2)
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. The difference from the first embodiment is the shape of the insulating material provided between the first coil A and the second coil B.

図２Ａ、図２Ｂを用いて、本実施の形態の変圧器について説明する。図２Ａ、図２Ｂの変圧器３０において、第１のコイルＡと第２のコイルＢの構造および配置は、実施の形態１と同様である。第１のコイルＡと第２のコイルＢとの間には、絶縁材１２と絶縁材１３が設けられている。   The transformer according to the present embodiment will be described with reference to FIGS. 2A and 2B. 2A and 2B, the structure and arrangement of the first coil A and the second coil B are the same as those in the first embodiment. Between the first coil A and the second coil B, an insulating material 12 and an insulating material 13 are provided.

絶縁材１２は、第１の２次巻線５の、第２の２次巻線１０との対向部を絶縁する役割を有し、形状はシート状であり、折り目はない。また、絶縁材１３は、第２の２次巻線１０の、第１の２次巻線５との対向部を絶縁する役割を有し、形状はシート状であり、折り目はない。   The insulating material 12 has a role of insulating the facing portion of the first secondary winding 5 and the second secondary winding 10, has a sheet shape, and has no folds. Moreover, the insulating material 13 has a role which insulates the opposing part with the 1st secondary winding 5 of the 2nd secondary winding 10, a shape is a sheet form, and there is no crease | fold.

なお、鉄心１の組み立てや構成、巻線の状態などは、実施の形態１と同様である。また、絶縁材１２や絶縁材１３の例としては、ノーメックスシート等が挙げられる。   The assembly and configuration of the iron core 1 and the state of the winding are the same as in the first embodiment. Examples of the insulating material 12 and the insulating material 13 include a nomex sheet.

本実施の形態では、第１のコイルＡと第２のコイルＢの間に、折り目がない絶縁材１２、１３を挟み込むことで、絶縁材１２や絶縁材１３を、第１のコイルＡの第１の２次巻線５の凹凸部５ｂ、５ｃや第２のコイルＢの第２の２次巻線１０の凹凸部１０ｂ、１０ｃに合わせて沿わせることができる。   In the present embodiment, the insulating materials 12 and 13 having no folds are sandwiched between the first coil A and the second coil B, so that the insulating material 12 and the insulating material 13 are attached to the first coil A in the first coil A. The concave and convex portions 5b and 5c of the first secondary winding 5 and the concave and convex portions 10b and 10c of the second secondary winding 10 of the second coil B can be aligned.

以上のように、本実施の形態によれば、実施の形態１と同様の効果を実現することができる。本実施の形態では、２個の絶縁材１２、１３を用いて説明したが、１個の絶縁材を用いてもよい。   As described above, according to the present embodiment, the same effect as in the first embodiment can be realized. In this embodiment, the two insulating materials 12 and 13 have been described. However, one insulating material may be used.

（実施の形態３）
本実施の形態において、実施の形態１と同様の構成については同一の番号を付して詳細な説明を省略する。実施の形態１と異なるのは、第１のコイルＡと第２のコイルＢとの間を絶縁材でモールドするようにした点である。さらに、第２のコイルＢの巻き線方向は、実施の形態１、２とは異ならせている。 (Embodiment 3)
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. The difference from the first embodiment is that the space between the first coil A and the second coil B is molded with an insulating material. Further, the winding direction of the second coil B is different from those of the first and second embodiments.

図３Ａ、図３Ｂを用いて、本実施の形態の変圧器について説明する。図３Ａ、図３Ｂの変圧器４０において、第１のコイルＡと第２のコイルＢの構造および配置は、実施の形態１と同様である。   The transformer according to the present embodiment will be described with reference to FIGS. 3A and 3B. 3A and 3B, the structure and arrangement of the first coil A and the second coil B are the same as those in the first embodiment.

本実施の形態では、第１のコイルＡを構成する凹凸形状を有する第１の２次巻線５と、第２のコイルＢを構成する凹凸部形状を有する第２の２次巻線１０との間、すなわち一方の凸部５ｂ、１０ｂと他方の凹部１０ｃ、５ｃとの間に、モールド絶縁材１４を充填して硬化させている。モールド絶縁材１４により、第１の２次巻線５と第２の２次巻線１０の位置を固定することができる。また、第１の２次巻線５と第２の２次巻線１０との間の絶縁を行うこともできる。鉄心１の組み立てや構成、巻線の状態などは、実施の形態１と同様である。なお、モールド絶縁材１４としては、例えば、エポキシ樹脂等が挙げられる。   In the present embodiment, a first secondary winding 5 having a concavo-convex shape constituting the first coil A, and a second secondary winding 10 having a concavo-convex shape constituting the second coil B, In other words, the mold insulating material 14 is filled and cured between the convex portions 5b and 10b and the concave portions 10c and 5c. The positions of the first secondary winding 5 and the second secondary winding 10 can be fixed by the mold insulating material 14. In addition, insulation between the first secondary winding 5 and the second secondary winding 10 can be performed. The assembly and configuration of the iron core 1 and the state of the winding are the same as in the first embodiment. In addition, as the mold insulating material 14, an epoxy resin etc. are mentioned, for example.

本実施の形態では、第２のコイルＢの巻き線方向を、実施の形態１、２とは異ならせている。しかし、本実施の形態においても、一方の凸部５ｂ、１０ｂが他方の凹部１０ｃ、５ｃに配置されるように、隣接する第１の２次巻線５の間、および隣接する第２の２次巻線１０の間の間隔を、第１の２次巻線５および第２の２次巻線１０の太さよりも大きくすればよい。   In the present embodiment, the winding direction of the second coil B is different from those of the first and second embodiments. However, also in the present embodiment, between the adjacent first secondary windings 5 and adjacent second 2 so that one convex portion 5b, 10b is disposed in the other concave portion 10c, 5c. What is necessary is just to make the space | interval between the secondary windings 10 larger than the thickness of the 1st secondary winding 5 and the 2nd secondary winding 10. FIG.

以上のように、本実施の形態によれば、実施の形態１、２と同様の効果を実現することができる。また、実施の形態１、２と比べて、第１のコイルＡと第２のコイルＢとの固定や第１のコイルＡと第２のコイルＢとの間の絶縁をより確実に行うことができる。   As described above, according to the present embodiment, it is possible to achieve the same effect as in the first and second embodiments. In addition, as compared with the first and second embodiments, the first coil A and the second coil B can be fixed and the insulation between the first coil A and the second coil B can be more reliably performed. it can.

本発明の変圧器は、２次巻線の断面積を大きくしても、小型化、薄型化を実現することができるので、特に２次電流の大きなアーク溶接機などに用いる変圧器として有用である。   Since the transformer of the present invention can be reduced in size and thickness even if the cross-sectional area of the secondary winding is increased, it is particularly useful as a transformer used in an arc welding machine having a large secondary current. is there.

１ 鉄心
２ 第１のボビン
３ 第１の１次巻線
４，６，９，１１，１２，１３ 絶縁材
５ 第１の２次巻線
５ａ，１０ａ 間隔
５ｂ，１０ｂ 凸部
５ｃ，１０ｃ 凹部
７ 第２のボビン
８ 第２の１次巻線
１０ 第２の２次巻線
１４ モールド絶縁材
２０，３０，４０ 変圧器 DESCRIPTION OF SYMBOLS 1 Iron core 2 1st bobbin 3 1st primary winding 4, 6, 9, 11, 12, 13 Insulation material 5 1st secondary winding 5a, 10a Space | interval 5b, 10b Convex part 5c, 10c Concave part 7 Second bobbin 8 Second primary winding 10 Second secondary winding 14 Mold insulation 20, 30, 40 Transformer

Claims (4)

２つのコイルと２つの鉄心を備えた変圧器であって、前記コイルは、ボビンと、前記ボビン上に巻回された第１の巻線と、前記第１の巻線上に絶縁物を介して巻回された第２の巻線とを備え、前記第２の巻線は、隣接する前記第２の巻線との間に前記第２の巻線の太さより大きい間隔が空くように巻回され、一方の前記コイルの第２の巻線の間に他方の前記コイルの第２の巻線が配置されるように前記２つのコイルを配置した変圧器。 A transformer including two coils and two iron cores, the coil including a bobbin, a first winding wound on the bobbin, and an insulator on the first winding And the second winding is wound so that a gap larger than the thickness of the second winding is provided between the second winding and the adjacent second winding. A transformer in which the two coils are arranged so that the second winding of the other coil is arranged between the second windings of one of the coils. 前記一方のコイルの前記第２の巻線の間の、前記他方のコイルの前記第２の巻線が配置される箇所に絶縁材を配置した請求項１記載の変圧器。 The transformer according to claim 1, wherein an insulating material is disposed between the second windings of the one coil at a position where the second winding of the other coil is disposed. 前記一方のコイルの前記第２の巻線の間の、前記他方のコイルの前記第２の巻線が配置される箇所を絶縁樹脂でモールドした請求項１記載の変圧器。 The transformer according to claim 1, wherein a portion where the second winding of the other coil is disposed between the second windings of the one coil is molded with an insulating resin. ２つのコイルと２つの鉄心を備えた変圧器の組み立て方法であって、ボビンに第１の巻線を巻回した後に、前記第１の巻線上に絶縁物を介して第２の巻線を、隣接する前記第２の巻線との間に前記第２の巻線の太さより大きい間隔が空くように巻回して前記２つのコイルを得るステップと、一方の前記コイルの第２の巻線の間に他方の前記コイルの第２の巻線が配置されるように前記２つのコイルを配置するステップと、２つの前記ボビンの内側の中空部分に２つの前記鉄心をそれぞれ挿入するステップとを備えた構成を有する変圧器の組み立て方法。 A method of assembling a transformer having two coils and two iron cores, wherein after winding a first winding around a bobbin, a second winding is placed on the first winding via an insulator. Winding the adjacent second winding so that a gap larger than the thickness of the second winding is provided to obtain the two coils, and the second winding of one of the coils Placing the two coils so that the second winding of the other coil is disposed between the two cores and inserting the two iron cores into the hollow portions inside the two bobbins, respectively. A method for assembling a transformer having the provided structure.
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