JP3235297U

JP3235297U - Coil bobbin type transformer

Info

Publication number: JP3235297U
Application number: JP2021003753U
Authority: JP
Inventors: 丈夫土田
Original assignee: 株式会社グローウィル
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-12-09
Anticipated expiration: 2031-09-30

Abstract

【課題】省エネ性能に優れたコイルボビン式トランスを提供する。【解決手段】コイルボビン式トランスは、ボビン１を備え、ボビン１は中央開口部１ａと環状のガイド部とを備える。２次巻線はボビン１のガイド部内に巻回される。１次巻線はガイド部内における２次巻線の外周に巻回される。巻鉄心５は、環状のボビン１と、その外周に巻回された１次巻線及び２次巻線の外周に、ボビン１の中央開口部１ａとボビン１の外周部を通るように巻回される。ボビン１の外周に、ボビン１の縁に沿って、コイル２を覆うように直線状に絶縁材料が設けられる。【選択図】図１PROBLEM TO BE SOLVED: To provide a coil bobbin type transformer excellent in energy saving performance. A coil bobbin type transformer includes a bobbin 1, and the bobbin 1 includes a central opening 1a and an annular guide portion. The secondary winding is wound in the guide portion of the bobbin 1. The primary winding is wound around the outer circumference of the secondary winding in the guide portion. The winding core 5 is wound around the annular bobbin 1 and the outer circumferences of the primary winding and the secondary winding wound around the bobbin 1 so as to pass through the central opening 1a of the bobbin 1 and the outer peripheral portion of the bobbin 1. Will be done. An insulating material is linearly provided on the outer periphery of the bobbin 1 along the edge of the bobbin 1 so as to cover the coil 2. [Selection diagram] Fig. 1

Description

本考案は、省エネ性能に優れたコイルボビン式トランスに関するものである。 The present invention relates to a coil bobbin type transformer having excellent energy-saving performance.

トランスの省エネ性能を向上させるため、巻鉄心を使用したコイルボビン式トランスが知られている。特許文献１や特許文献２に示すに示すトランスは、その一例である。この種のトランスは、コイルに鉄心を巻くことにより、鉄心有効断面を均一にすることができる、磁路が短くなる、方向性珪素鋼板の鉄心性能を有効に活用できる、という利点がある。また、鉄心に切断面やギャップがないため、漏洩磁束が少なく騒音や振動も発生し難い利点もある。 A coil bobbin type transformer using a wound iron core is known in order to improve the energy-saving performance of the transformer. The transformers shown in Patent Document 1 and Patent Document 2 are examples thereof. This type of transformer has the advantages that the effective cross section of the iron core can be made uniform by winding the iron core around the coil, the magnetic path is shortened, and the core performance of the directional silicon steel plate can be effectively utilized. In addition, since there are no cut surfaces or gaps in the iron core, there is an advantage that leakage magnetic flux is small and noise and vibration are unlikely to occur.

特開２００３−００７５５４号公報Japanese Unexamined Patent Publication No. 2003-007554 特開２００１−２０３１１６号公報Japanese Unexamined Patent Publication No. 2001-203116

このように省エネその他の利点が大きなコイルボビン式トランスではあるが、最近では、より小型で、電気的性能に優れた製品が要望されている。その一つに、突入電流の抑制がある。すなわち、一般的に、トランスを小型化させるためには、トランスのコアの磁束密度を高くするとコイルが小型化できるが、このことと、突入電流の値は反比例の関係になる。そのため、小型で、しかも突入電流が小さいコイルボビン式トランスの実現が要望されている。 Although the coil bobbin type transformer has such great energy saving and other advantages, recently, there is a demand for a smaller product having excellent electrical performance. One of them is suppression of inrush current. That is, in general, in order to miniaturize the transformer, the coil can be miniaturized by increasing the magnetic flux density of the core of the transformer, but this and the value of the inrush current have an inverse proportional relationship. Therefore, there is a demand for the realization of a coil bobbin type transformer that is compact and has a small inrush current.

さらに、この種のトランスは、図５（ａ）（ｂ）に示すように、枠状のボビン１にコイル２を巻回した後、ボビン１の開口部を通して巻鉄心５を巻回していくため、ボビン１に巻回したコイル２とその周囲に巻回される巻鉄心５との絶縁が不可欠である。従来、この絶縁は、絶縁紙等のシート状の絶縁材料、例えば絶縁紙６をボビン１とコイル２の外周に巻き付け、その外側から固定用テープ７によって押さえることにより、行っていた。 Further, in this type of transformer, as shown in FIGS. 5A and 5B, the coil 2 is wound around the frame-shaped bobbin 1, and then the wound iron core 5 is wound through the opening of the bobbin 1. Insulation between the coil 2 wound around the bobbin 1 and the wound iron core 5 wound around the coil 2 is indispensable. Conventionally, this insulation has been performed by winding a sheet-shaped insulating material such as insulating paper, for example, insulating paper 6 around the outer periphery of the bobbin 1 and the coil 2 and pressing the insulating paper 7 from the outside thereof.

しかし、従来技術では、図５（ａ）に示すように、絶縁紙６はコイル２の外周面に密着して固定されていたため、固定した絶縁紙６の中央部分が折れ曲がってよれ６１が生じたり、皺がよったりする等の不都合がある。すなわち、ボビン１の周囲に巻回されたコイル２の外周は、ボビン１のコーナー部において湾曲して巻回されることから、平らなシート状の絶縁紙６をコイル２に巻き付けると、絶縁紙６の中央部分によれ６１が生じ、コイル２と巻鉄心５の絶縁が不均等になる恐れがある。また、このよれ６１は、その周囲に巻鉄心５を巻回する場合の障害になったり、コイル２の外周と巻鉄心５との間隔を不均等にさせたりして、トランス性能のばらつきの要因ともなる。 However, in the prior art, as shown in FIG. 5A, the insulating paper 6 is fixed in close contact with the outer peripheral surface of the coil 2, so that the central portion of the fixed insulating paper 6 is bent to cause a twist 61. , There are inconveniences such as wrinkles. That is, since the outer circumference of the coil 2 wound around the bobbin 1 is curved and wound at the corner portion of the bobbin 1, when the flat sheet-shaped insulating paper 6 is wound around the coil 2, the insulating paper is wound. 61 is generated by the central portion of 6, and there is a possibility that the insulation between the coil 2 and the winding core 5 becomes uneven. Further, this twist 61 becomes an obstacle when the wound iron core 5 is wound around the winding core 5 or makes the distance between the outer circumference of the coil 2 and the wound iron core 5 uneven, which causes a variation in transformer performance. It also becomes.

本考案は前記のような従来技術の問題点を解決するために提案されたものである。本考案の目的は、小型で電気的性能がより優れたコイルボビン式トランスを提供することである。 The present invention has been proposed to solve the above-mentioned problems of the prior art. An object of the present invention is to provide a coil bobbin type transformer that is compact and has better electrical performance.

前記の目的を達成するために、本考案のトランスは、次のような構成を有することを特徴とする。
（１）中央開口部と、環状のガイド部とを備えたボビン。
（２）前記ボビンの前記ガイド部内に巻回された２次巻線。
（３）前記ボビンの前記ガイド部内における前記２次巻線の外周に巻回された１次巻線。
（４）環状の前記ボビンと、その外周に巻回された前記１次巻線と前記２次巻線の外周に、前記ボビンの前記中央開口部と前記ボビンの外周部を通るように巻回された巻鉄心。 In order to achieve the above object, the transformer of the present invention is characterized by having the following configuration.
(1) A bobbin having a central opening and an annular guide portion.
(2) A secondary winding wound in the guide portion of the bobbin.
(3) A primary winding wound around the outer periphery of the secondary winding in the guide portion of the bobbin.
(4) The annular bobbin, the primary winding wound around the bobbin, and the outer periphery of the secondary winding are wound so as to pass through the central opening of the bobbin and the outer peripheral portion of the bobbin. The rolled iron core.

前記のような構成を有する本考案のトランスは、次の構成を採用することができる。
（１）前記ボビンの外周に、前記ボビンの縁に沿って、前記巻線の外周を覆うように直線状に絶縁材料が設けられている。
（２）前記２次巻線の線径は前記１次巻線の線径よりも大きい。
（３）前記１次巻線と前記２次巻線は同じ肉厚の平角導体から構成され、前記２次巻線の平角導体の幅は前記１次巻線の平角導体の幅よりも大きい。 The transformer of the present invention having the above-mentioned configuration can adopt the following configuration.
(1) An insulating material is linearly provided on the outer circumference of the bobbin along the edge of the bobbin so as to cover the outer circumference of the winding.
(2) The wire diameter of the secondary winding is larger than the wire diameter of the primary winding.
(3) The primary winding and the secondary winding are composed of a flat conductor having the same wall thickness, and the width of the flat conductor of the secondary winding is larger than the width of the flat conductor of the primary winding.

本考案の実施形態によれば、突入電流が抑制され、巻鉄心とコイルとの絶縁性能に優れたコイルボビン式トランスが得られる。 According to the embodiment of the present invention, a coil bobbin type transformer in which the inrush current is suppressed and the insulation performance between the wound core and the coil is excellent can be obtained.

実施形態のコイルボビン式トランスの縦断面図。The vertical sectional view of the coil bobbin type transformer of an embodiment. 実施形態のコイルボビン式トランスの横断面図。The cross-sectional view of the coil bobbin type transformer of an embodiment. 実施形態のコイルボビン式トランスの巻線部分の拡大断面図。The enlarged sectional view of the winding part of the coil bobbin type transformer of an embodiment. 実施形態のコイルボビン式トランスにおける絶縁紙の状態を示す図で、（ａ）は縦断面図、（ｂ）は横断面図。It is a figure which shows the state of the insulating paper in the coil bobbin type transformer of an embodiment, (a) is a vertical sectional view, (b) is a horizontal sectional view. 従来技術のコイルボビン式トランスにおける絶縁紙の状態を示す図で、（ａ）は縦断面図、（ｂ）は横断面図。It is a figure which shows the state of the insulating paper in the coil bobbin type transformer of the prior art, (a) is a vertical sectional view, (b) is a horizontal sectional view.

［１．第１実施形態］
［１−１．第１実施形態の構成］
以下、本考案の第１実施形態を図面に従って具体的に説明する。
本実施形態のコイルボビン式のトランスは、中央開口部１ａと環状のガイド部１ｂとを備えたボビン１を備える。ボビン１は角が丸くなった長方形であり、その周囲にコイル２が巻回される。また、ボビン１の２つの長辺部分に、後述する巻鉄心５がそれぞれ巻回される。 [1. First Embodiment]
[1-1. Configuration of the first embodiment]
Hereinafter, the first embodiment of the present invention will be specifically described with reference to the drawings.
The coil bobbin type transformer of the present embodiment includes a bobbin 1 having a central opening 1a and an annular guide portion 1b. The bobbin 1 is a rectangle with rounded corners, and a coil 2 is wound around it. Further, the winding iron core 5 described later is wound around each of the two long side portions of the bobbin 1.

ガイド部１ｂは、中央開口部１ａ側が底になった断面Ｕ字形の溝状部材である。ガイド部１ｂの溝内にコイル２が巻回させる。本実施形態では、コイル２は、２次巻線２１と１次巻線２２とから構成される。２次巻線２１は平角導体から構成される。 The guide portion 1b is a groove-shaped member having a U-shaped cross section with the central opening 1a side at the bottom. The coil 2 is wound in the groove of the guide portion 1b. In the present embodiment, the coil 2 is composed of a secondary winding 21 and a primary winding 22. The secondary winding 21 is composed of a flat conductor.

ガイド部１ｂ内に巻回された２次巻線２１の外周に、ガイド部１ｂの溝内に収まるように、１次巻線２２が巻回される。２次巻線２１は平角導体から構成される。１次巻線２２と２次巻線２１は同じ肉厚の平角導体から構成され、２次巻線２１の平角導体の幅は１次巻線２２の平角導体の幅よりも大きい。そのため、２次巻線２１の線径は１次巻線２２の線径よりも大きい。 The primary winding 22 is wound around the outer circumference of the secondary winding 21 wound in the guide portion 1b so as to fit in the groove of the guide portion 1b. The secondary winding 21 is composed of a flat conductor. The primary winding 22 and the secondary winding 21 are composed of flat conductors having the same wall thickness, and the width of the flat conductor of the secondary winding 21 is larger than the width of the flat conductor of the primary winding 22. Therefore, the wire diameter of the secondary winding 21 is larger than the wire diameter of the primary winding 22.

環状のボビン１と、その外周に巻回されたコイル２の外周に絶縁紙６が設けられる。絶縁紙６は、ボビン１の溝内に巻回されたコイル２を外側から覆うように、断面が逆Ｕ字形になるようにボビン１に被せられる。この場合、絶縁紙６は、コイル２の表面に沿って湾曲して設けられるのではなく、ボビン１の縁に沿ってほぼ直線状に伸びた状態で、ボビン１内のコイル２を被覆する。その結果、図４（ａ）に示すように、ボビン１の両端側では、コイル２の表面と絶縁紙６との間に若干の隙間が生じるが、絶縁紙６は屈曲したり、しわが寄ったりすることなく、ボビン１およびコイル２の外周を被覆する。 An insulating paper 6 is provided on the outer periphery of the annular bobbin 1 and the coil 2 wound around the bobbin 1. The insulating paper 6 is put on the bobbin 1 so that the coil 2 wound in the groove of the bobbin 1 is covered from the outside and the cross section is inverted U-shaped. In this case, the insulating paper 6 is not provided curved along the surface of the coil 2, but covers the coil 2 in the bobbin 1 in a state of extending substantially linearly along the edge of the bobbin 1. As a result, as shown in FIG. 4A, a slight gap is formed between the surface of the coil 2 and the insulating paper 6 on both ends of the bobbin 1, but the insulating paper 6 is bent or wrinkled. It covers the outer periphery of the bobbin 1 and the coil 2 without any trouble.

絶縁紙６はボビン１に対して、固定用テープ７によって固定される。固定用テープ７は、ボビン１の開口部１ａを通ってボビン１の外周に巻き付けられる。本実施形態では、適切な間隔で配置された４本の固定用テープ７によって、絶縁紙６がボビン１に固定される。 The insulating paper 6 is fixed to the bobbin 1 by the fixing tape 7. The fixing tape 7 is wound around the outer circumference of the bobbin 1 through the opening 1a of the bobbin 1. In the present embodiment, the insulating paper 6 is fixed to the bobbin 1 by four fixing tapes 7 arranged at appropriate intervals.

なお、本考案において、絶縁紙６の代わりに、他の材質、例えば樹脂シートなどのシート状絶縁材料も使用可能である。 In the present invention, instead of the insulating paper 6, another material, for example, a sheet-shaped insulating material such as a resin sheet can be used.

このようにボビン１に巻回された２次巻線２１、１次巻線２２、及び絶縁紙６の外周に巻鉄心５が巻回される。巻鉄心５はボビン１の中央開口部１ａとボビン１の外周部を通るように巻回される。本実施形態では、ボビン１に２個の巻鉄心５が巻回される。すなわち、長方形をした環状のボビン１は、２つの長辺部分を有することから、それぞれの長辺部分に巻鉄心５が巻回される。 The winding iron core 5 is wound around the outer periphery of the secondary winding 21, the primary winding 22, and the insulating paper 6 wound around the bobbin 1 in this way. The winding core 5 is wound so as to pass through the central opening 1a of the bobbin 1 and the outer peripheral portion of the bobbin 1. In this embodiment, two wound iron cores 5 are wound around the bobbin 1. That is, since the rectangular annular bobbin 1 has two long side portions, the wound iron core 5 is wound around each long side portion.

［１−２．第１実施形態の作用効果］
前記のような構成を有する第１実施形態によれば、下記の作用効果が発揮される。
（１）１次巻線２２を２次巻線２１の外側に巻回することにより、１次巻線２２の巻径が大きくなり、２次巻線２１を外側に巻回した場合に比較して、突入電流の抑制が可能となる。
（２）絶縁紙６をボビン１の縁に沿って直線状に配置したため、絶縁紙６が折れ曲がったり、よれが生じたりすることがなく、コイル２と巻鉄心５との間に絶縁材料を均等に配置することが可能となる。
（３）１次巻線２２と２次巻線２１の両者を平角導体とすることで、巻線を密着して巻回することができ、巻回作業の効率化が図れる。
（４）平角導体の使用により、導体間に余分な空隙が生じないため、漏れ磁束の削減が可能となり、トランス性能の向上が可能となる。 [1-2. Action effect of the first embodiment]
According to the first embodiment having the above-mentioned configuration, the following effects are exhibited.
(1) By winding the primary winding 22 to the outside of the secondary winding 21, the winding diameter of the primary winding 22 becomes large, and compared with the case where the secondary winding 21 is wound to the outside. Therefore, the inrush current can be suppressed.
(2) Since the insulating paper 6 is arranged linearly along the edge of the bobbin 1, the insulating paper 6 does not bend or twist, and the insulating material is evenly distributed between the coil 2 and the wound iron core 5. It is possible to place it in.
(3) By using both the primary winding 22 and the secondary winding 21 as flat conductors, the windings can be wound in close contact with each other, and the efficiency of the winding work can be improved.
(4) Since no extra void is generated between the conductors by using the flat conductor, the leakage flux can be reduced and the transformer performance can be improved.

１…ボビン
１ａ…中央開口部
１ｂ…ガイド部
２…コイル
２１…２次巻線
２２…１次巻線
４…絶縁材
５…巻鉄心
６…絶縁紙
７…固定用テープ 1 ... Bobbin 1a ... Central opening 1b ... Guide part 2 ... Coil 21 ... Secondary winding 22 ... Primary winding 4 ... Insulating material 5 ... Winding iron core 6 ... Insulating paper 7 ... Fixing tape

Claims

A bobbin with a central opening and an annular guide,
A secondary winding wound in the guide portion of the bobbin, and
The primary winding wound around the outer circumference of the secondary winding in the guide portion of the bobbin,
A winding wound around the annular bobbin, the primary winding wound around the bobbin, and the outer periphery of the secondary winding so as to pass through the central opening of the bobbin and the outer peripheral portion of the bobbin. With the iron core,
A coil bobbin type transformer characterized by being equipped with.

The coil bobbin type transformer according to claim 1, wherein an insulating material is linearly provided on the outer periphery of the bobbin along the edge of the bobbin so as to cover the outer periphery of the winding.

The coil bobbin type transformer according to claim 1 or 2, wherein the wire diameter of the secondary winding is larger than the wire diameter of the primary winding.

The primary winding and the secondary winding are composed of a flat conductor having the same wall thickness, and the width of the flat conductor of the secondary winding is larger than the width of the flat conductor of the primary winding. The coil bobbin type transformer according to any one of claims 1 to 3, wherein the coil bobbin type transformer is characterized.