JP6101441B2

JP6101441B2 - Large current coil

Info

Publication number: JP6101441B2
Application number: JP2012153573A
Authority: JP
Inventors: 武治依田; 猫塚　克行; 克行猫塚; 横田　英俊; 英俊横田
Original assignee: Soshin Electric Co Ltd
Current assignee: Soshin Electric Co Ltd
Priority date: 2012-07-09
Filing date: 2012-07-09
Publication date: 2017-03-22
Anticipated expiration: 2032-07-09
Also published as: JP2014017365A

Description

本発明は、例えば高電力電気装置あるいはインバータ等の電力変換装置等に使用されるノイズフィルタ等に用いられる大電流用コイルに関する。 The present invention relates to a high-current coil used for a noise filter or the like used in, for example, a high-power electric device or a power converter such as an inverter.

ノイズフィルタは、コイル及びコンデンサから構成され、電源回路のノイズ抑制を目的に使用される。近年、これらの電源回路を使用する装置においては、大電流化及び小型化が進んでおり、同装置に使用されるノイズフィルタもその例外でない。 The noise filter includes a coil and a capacitor, and is used for the purpose of suppressing noise in the power supply circuit. In recent years, devices using these power supply circuits have been increased in current and size, and noise filters used in the devices are no exception.

従来、大電流化させる方法としては、例えば特許文献１の図１０に示すように、コアにコイル形成用金属板（ブスバー）を貫通させてコイルを構成する方法があり、さらに小型化させる方法として、特許文献１の図１及び図２等並びに特許文献２の図１及び図２等のようにコイル形成用金属板を巻回してコイルを構成する方法が提案されている。特許文献１記載のコイルは、コイル形成用金属板をねじ止めにより巻線化させた構造を採用し、特許文献２記載のコイルは、コイル形成用金属板をはんだ付けにより巻線化させた構造を採用しており、いずれも大電流化及び一定の小型化を達成することができるようになった。 Conventionally, as a method of increasing the current, for example, as shown in FIG. 10 of Patent Document 1, there is a method of forming a coil by passing a coil forming metal plate (bus bar) through the core. 1 and 2 of Patent Document 1 and FIGS. 1 and 2 of Patent Document 2 have proposed a method of forming a coil by winding a coil forming metal plate. The coil described in Patent Document 1 employs a structure in which a coil forming metal plate is wound by screwing, and the coil described in Patent Document 2 has a structure in which the coil forming metal plate is wound by soldering. In both cases, a large current and a certain size reduction can be achieved.

コイルのインダクタンス値Ｌは、Ｌ＝Ｌｘ×Ｎ^２×Ｄで計算される（Ｌｘ：コア１貫通あたりのインダクタンス値、Ｎ：コイル巻き数、Ｄ：コア使用数）。従って、コア貫通タイプにおいては、コア数を増加させることで、また、コア巻きタイプでは、巻数を増加させることで、インダクタンス値Ｌを大きくすることができる。また、コア巻きタイプは、コア数削減によるスペース縮小により、製品を小さくすることが可能となる。また、コイルの許容電流は、コイル形成用金属板（ブスバー）の断面積に比例する。 The inductance value L of the coil is calculated as L = Lx × N ² × D (Lx: inductance value per core penetration, N: number of coil turns, D: number of cores used). Therefore, the inductance value L can be increased by increasing the number of cores in the core penetration type, and by increasing the number of turns in the core winding type. Further, the core winding type can reduce the size of the product by reducing the space by reducing the number of cores. The allowable current of the coil is proportional to the cross-sectional area of the coil forming metal plate (bus bar).

特開平１０−１０６８６１号公報Japanese Patent Laid-Open No. 10-106861 特開２００１−２７４０３０号公報JP 2001-274030 A

ところで、上述した従来のコイルは、コイル形成用金属板の板面同士をねじ止めしたりはんだ付けするようにしている。この場合、金属板の板面の幅を広くすると、コアの径を大きくする必要があり、その分、コイル全体のサイズが大きくなり、実装スペースも大きくなる。そこで、コイル全体の小型化を狙ってコイル形成用金属板の板面の幅を小さくすると、それに応じてコイル形成用金属板の表面積が小さくなり、放熱性が悪化する。そのため、コイル形成用金属板の板面の狭小化には限界があり、小型化並びに実装スペースの省スペース化を促進させることができない。また、従来のコイルは、コイル形成用金属板をＬ字形やそれ以上の複雑な形状に加工しなければならず、市販の金属板からの切り出し工数や材料ロスが大きい。 By the way, in the conventional coil described above, the plate surfaces of the coil forming metal plate are screwed together or soldered. In this case, if the width of the plate surface of the metal plate is increased, it is necessary to increase the diameter of the core, and accordingly, the size of the entire coil increases and the mounting space also increases. Therefore, if the width of the plate surface of the coil-forming metal plate is reduced with the aim of reducing the size of the entire coil, the surface area of the coil-forming metal plate is reduced accordingly, and the heat dissipation is deteriorated. Therefore, there is a limit to narrowing the plate surface of the coil forming metal plate, and it is not possible to promote downsizing and space saving of the mounting space. Moreover, the conventional coil has to process the coil forming metal plate into an L shape or a more complicated shape, and has a large number of man-hours for cutting out from a commercially available metal plate and material loss.

本発明はこのような課題を考慮してなされたものであり、簡単な構成を採用しながらも、放熱効果を向上させることができ、さらなる大電流化及び小型化の要請に対応することができ、しかも、加工工数の削減及び材料の有効利用を図ることができる大電流用コイルを提供することを目的とする。 The present invention has been made in consideration of such problems, and while adopting a simple configuration, it is possible to improve the heat dissipation effect, and to meet the demand for further increase in current and size. And it aims at providing the coil for large currents which can aim at reduction of a process man-hour and effective utilization of material.

［１］本発明に係る大電流用コイルは、実装面を有するトロイダルコアと、前記トロイダルコアに巻線される２以上の巻回部とを有する大電流用コイルにおいて、前記巻回部は、第１巻回部及び第２巻回部を有し、前記第１巻回部は、入力側から前記トロイダルコアの中心軸に沿って前記トロイダルコア内を挿通し、出力側に延びる第１入力側部材と、前記第１入力側部材の端部から、前記実装面とほぼ平行に第１方向に延びる第１入力側折り返し部材と、出力側から前記トロイダルコアの中心軸に沿って前記トロイダルコア内を挿通し、入力側に延びる第１出力側部材と、前記第１出力側部材の端部から、前記第１方向に延びる第１出力側折り返し部材と、前記第１入力側折り返し部材と前記第１出力側折り返し部材とを連結する第１連結部材とを有し、前記第２巻回部は、入力側から前記トロイダルコアの中心軸に沿って前記トロイダルコア内を挿通し、出力側に延びる第２入力側部材と、前記第２入力側部材の端部から、前記第１方向と反対方向の第２方向に延びる第２入力側折り返し部材と、出力側から前記トロイダルコアの中心軸に沿って前記トロイダルコア内を挿通し、入力側に延びる第２出力側部材と、前記第２出力側部材の端部から、前記第２方向に延びる第２出力側折り返し部材と、前記第２入力側折り返し部材と前記第２出力側折り返し部材とを連結する第２連結部材とを有し、前記第１巻回部における前記第１連結部材の板面の幅は、前記第１入力側部材、前記第１入力側折り返し部材、前記第１出力側部材及び前記第１出力側折り返し部材の各板面の幅よりも広く、前記第２巻回部における前記第２連結部材の板面の幅は、前記第２入力側部材、前記第２入力側折り返し部材、前記第２出力側部材及び前記第２出力側折り返し部材の各板面の幅よりも広いことを特徴とする。
[1 large-current coil according to the present invention, Oite a toroidal core having a mounting surface, a large current coil having a 2 or more wound portion which is wound on the toroidal core, the winding unit Has a first winding part and a second winding part, and the first winding part is inserted into the toroidal core from the input side along the central axis of the toroidal core and extends to the output side. A first input-side member, a first input-side folded member extending in a first direction from the end of the first input-side member in a first direction substantially parallel to the mounting surface, and a central axis of the toroidal core from the output side. A first output member extending through the toroidal core and extending to the input side; a first output folding member extending in the first direction from an end of the first output member; and the first input folding member And the first output side folded member And a member, said second winding portion is inserted through the said toroidal core along from the input side to the central axis of the toroidal core, and a second input-side member extending on the output side, the second input A second input-side folded member extending in the second direction opposite to the first direction from the end of the member; and the inside of the toroidal core is inserted from the output side along the central axis of the toroidal core; A second output side member extending; a second output side folding member extending in the second direction from an end of the second output side member; the second input side folding member; and the second output side folding member. A width of the plate surface of the first connecting member in the first winding portion is the first input side member, the first input side folded member, and the first output side. Width of each plate surface of the member and the first output side folded member The width of the plate surface of the second connecting member in the second winding portion is wider than the second input side member, the second input side folded member, the second output side member, and the second output side. than the width of each plate surface of the folded member and said wide Ikoto.

［２］この場合、前記巻回部は、さらに第３巻回部を有し、入力側から前記トロイダルコアの中心軸に沿って前記トロイダルコア内を挿通し、出力側に延びる第３入力側部材と、前記第３入力側部材の端部から、前記実装面から離間する方向に延びる第３入力側折り返し部材と、出力側から前記トロイダルコアの中心軸に沿って前記トロイダルコア内を挿通し、入力側に延びる第３出力側部材と、前記第３出力側部材の端部から、前記実装面から離間する方向に延びる第３出力側折り返し部材と、前記第３入力側折り返し部材と前記第３出力側折り返し部材とを連結する第３連結部材とを有し、前記第３連結部材の板面の幅は、前記第３入力側部材、前記第３入力側折り返し部材、前記第３出力側部材及び前記第３出力側折り返し部材の各板面の幅よりも広くしてもよい。
[ 2 ] In this case, the winding part further has a third winding part, and is inserted into the toroidal core along the central axis of the toroidal core from the input side, and extends to the output side. A member, a third input-side folded member extending in a direction away from the mounting surface from the end of the third input-side member, and the inside of the toroidal core from the output side along the central axis of the toroidal core A third output side member extending to the input side; a third output side folding member extending from the end of the third output side member in a direction away from the mounting surface; the third input side folding member; A third connecting member that connects the three output side folding members, and the width of the plate surface of the third connecting member is the third input side member, the third input side folding member, and the third output side. Each of the member and the third output side folding member It may be wider than the width of the surface.

［３］本発明において、前記連結部材の板面の幅をＷａ、前記入力側部材、前記入力側折り返し部材、前記出力側部材及び前記出力側折り返し部材の各板面の幅のうち、最大の幅をＷｂとしたとき、
Ｗａ≧１．５×Ｗｂ
であってもよい。
[ 3 ] In the present invention, the width of the plate surface of the connecting member is Wa, and is the largest of the widths of the plate surfaces of the input side member, the input side folded member, the output side member, and the output side folded member. When the width is Wb,
Wa ≧ 1.5 × Wb
It may be.

［４］さらに好ましくは、Ｗａ≧１．７×Ｗｂである。
[ 4 ] More preferably, Wa ≧ 1.7 × Wb.

［５］［３］又は［４］において、前記実装面の幅をＷｃとしたとき、
Ｗａ≦３×Ｗｃ
であることが好ましい。
[ 5 ] In [ 3 ] or [ 4 ], when the width of the mounting surface is Wc,
Wa ≦ 3 × Wc
It is preferable that

［６］本発明において、前記入力側部材と前記入力側折り返し部材とが一体化され、前記出力側部材と前記出力側折り返し部材とが一体化されていてもよい。
[ 6 ] In the present invention, the input side member and the input side folded member may be integrated, and the output side member and the output side folded member may be integrated.

本発明に係る大電流用コイルによれば、以下の効果を奏する。
（１）簡単な構成を採用しながらも、さらなる大電流化及び小型化の要請に対応することができる。
（２）連結部材の板面の幅を広くし、表面積を大きくしたので、放熱効果が向上し、コイルの温度上昇を抑制することができる。
（３）市販のブスバーの長さ及び一部折り曲げ加工のみで、コイル形成用金属板を構成することができ、加工工数の削減、材料の有効利用を図ることができる。 The coil for large current according to the present invention has the following effects.
(1) While adopting a simple configuration, it is possible to meet demands for further increase in current and size.
(2) Since the width of the plate surface of the connecting member is increased and the surface area is increased, the heat dissipation effect is improved and the temperature rise of the coil can be suppressed.
(3) The metal plate for coil formation can be comprised only by the length and partial bending process of a commercially available bus bar, and reduction of a process man-hour and effective utilization of a material can be aimed at.

本実施の形態に係る大電流用コイルが適用されるインバータの一例を示す回路図である。It is a circuit diagram which shows an example of the inverter to which the coil for large currents concerning this Embodiment is applied. 第１の実施の形態に係る大電流用コイル（第１コイル）の構成を示す斜視図である。It is a perspective view which shows the structure of the coil for large currents (1st coil) which concerns on 1st Embodiment. 図３Ａは第２の実施の形態に係る大電流用コイル（第２コイル）の構成を示す斜視図であり、図３Ｂは第１方向を説明するための図である。FIG. 3A is a perspective view showing a configuration of a large current coil (second coil) according to the second embodiment, and FIG. 3B is a diagram for explaining a first direction. 図４Ａは第２コイルを示す正面図であり、図４Ｂは第２コイルを示す背面図である。4A is a front view showing the second coil, and FIG. 4B is a rear view showing the second coil. 図５Ａは第２コイルを示す右側面図であり、図５Ｂは第２コイルを示す左側面図である。FIG. 5A is a right side view showing the second coil, and FIG. 5B is a left side view showing the second coil. 図６Ａは第２コイルを示す平面図であり、図６Ｂは第２コイルを示す底面図である。6A is a plan view showing the second coil, and FIG. 6B is a bottom view showing the second coil. 第３の実施の形態に係る大電流用コイル（第３コイル）の構成を示す斜視図である。It is a perspective view which shows the structure of the coil for large currents (3rd coil) which concerns on 3rd Embodiment. 図８Ａは第３コイルを示す正面図であり、図８Ｂは第３コイルを示す背面図である。FIG. 8A is a front view showing the third coil, and FIG. 8B is a rear view showing the third coil. 図９Ａは第３コイルを示す右側面図であり、図９Ｂは第３コイルを示す左側面図である。9A is a right side view showing the third coil, and FIG. 9B is a left side view showing the third coil. 図１０Ａは第３コイルを示す平面図であり、図１０Ｂは第３コイルを示す底面図である。FIG. 10A is a plan view showing the third coil, and FIG. 10B is a bottom view showing the third coil. 第４の実施の形態に係る大電流用コイル（第４コイル）の構成を示す斜視図である。It is a perspective view which shows the structure of the coil for large currents (4th coil) which concerns on 4th Embodiment. 図１２Ａは第４コイルを示す正面図であり、図１２Ｂは第４コイルを示す背面図である。12A is a front view showing the fourth coil, and FIG. 12B is a rear view showing the fourth coil. 図１３Ａは第４コイルを示す右側面図であり、図１３Ｂは第４コイルを示す左側面図である。FIG. 13A is a right side view showing the fourth coil, and FIG. 13B is a left side view showing the fourth coil. 図１４Ａは第４コイルを示す平面図であり、図１４Ｂは第４コイルを示す底面図である。14A is a plan view showing the fourth coil, and FIG. 14B is a bottom view showing the fourth coil.

以下、本発明に係る大電流用コイルの実施の形態例を図１〜図１４Ｂを参照しながら説明する。 Hereinafter, an embodiment of a large current coil according to the present invention will be described with reference to FIGS.

先ず、本実施の形態に係る大電流用コイル１０が適用される例えばインバータ１００について図１を参照しながら簡単に説明する。 First, for example, an inverter 100 to which the large current coil 10 according to the present embodiment is applied will be briefly described with reference to FIG.

このインバータ１００は、バッテリ１０２とモータ１０４間に、本実施の形態に係る大電流用コイル１０、アクロス・ザ・ライン・コンデンサ（Ｘコンデンサ）及びラインバイパスコンデンサ（Ｙコンデンサ）等を有するＥＭＩフィルタ１０６と、例えば２個のスイッチング素子等を有する整流回路１０８と、放電用の抵抗（放電抵抗）と平滑コンデンサとが並列に接続された平滑コンデンサ部１１０と、例えば６個のスイッチング素子を有する三相出力のインバータ回路１１２とを有する。 The inverter 100 includes an EMI filter 106 having a large current coil 10, an across-the-line capacitor (X capacitor), a line bypass capacitor (Y capacitor), and the like between the battery 102 and the motor 104. A rectifier circuit 108 having, for example, two switching elements, a smoothing capacitor unit 110 in which a discharging resistor (discharge resistor) and a smoothing capacitor are connected in parallel, and a three-phase having, for example, six switching elements And an output inverter circuit 112.

本実施の形態に係る大電流用コイル１０は、図１に示すように、単相二線式のチョークコイルや、三相三線式のチョークコイル（図示せず）等が挙げられる。 As shown in FIG. 1, the large current coil 10 according to the present embodiment includes a single-phase two-wire choke coil, a three-phase three-wire choke coil (not shown), and the like.

そして、第１の実施の形態に係る大電流用コイル（以下、第１コイル１０Ａと記す）は、図２に示すように、実装面１２（底面）を有する矩形状のトロイダルコア１４（コア数＝１）と、該トロイダルコア１４に巻線される１つの巻回部１６とを有する。 As shown in FIG. 2, the large current coil according to the first embodiment (hereinafter referred to as the first coil 10 </ b> A) has a rectangular toroidal core 14 (number of cores) having a mounting surface 12 (bottom surface). = 1) and one winding portion 16 wound around the toroidal core 14.

巻回部１６は、入力側部材１８と、入力側折り返し部材２０と、出力側部材２２と、出力側折り返し部材２４と、連結部材２６とを有する。各部材は、許容電流に対応した断面積以上の断面積を有する。 The winding unit 16 includes an input side member 18, an input side folding member 20, an output side member 22, an output side folding member 24, and a connecting member 26. Each member has a cross-sectional area equal to or larger than the cross-sectional area corresponding to the allowable current.

入力側部材１８は、入力側からトロイダルコア１４の中心軸Ｌｃに沿ってトロイダルコア１４内を挿通し、出力側に延びる平板状の金属板にて構成されている。入力側部材１８の入力側端部には、図示しない入力端子台に接続するための貫通孔２８が形成されている。入力側部材１８の出力側端部１８ａは、トロイダルコア１４の中心軸Ｌｃを直交するように断面Ｌ字状に屈曲され、後述する入力側折り返し部材２０の取り付け部を構成している。 The input side member 18 is configured by a flat metal plate that extends from the input side along the central axis Lc of the toroidal core 14 through the toroidal core 14 and extends to the output side. A through hole 28 for connection to an input terminal block (not shown) is formed at the input side end of the input side member 18. The output side end portion 18a of the input side member 18 is bent in an L-shaped cross section so as to be orthogonal to the central axis Lc of the toroidal core 14, and constitutes an attachment portion for the input side folding member 20 described later.

入力側折り返し部材２０は、入力側部材１８の出力側端部１８ａ（取り付け部）から、実装面１２から離間する方向に延びる角柱状の金属板にて構成されている。この入力側折り返し部材２０は、入力側部材１８の出力側端部１８ａに、例えばボルト（図示せず）により固定される。 The input-side folded member 20 is configured by a prismatic metal plate extending in a direction away from the mounting surface 12 from the output-side end portion 18 a (attachment portion) of the input-side member 18. The input side folding member 20 is fixed to the output side end portion 18a of the input side member 18 by, for example, a bolt (not shown).

出力側部材２２は、出力側からトロイダルコア１４の中心軸Ｌｃに沿ってトロイダルコア１４内を挿通し、入力側に延びる平板状の金属板にて構成されている。出力側部材２２の出力側端部には、図示しない出力端子台に接続するための貫通孔３０が形成されている。出力側部材２２の入力側端部２２ａは、トロイダルコア１４の中心軸Ｌｃを直交するように断面Ｌ字状に屈曲され、後述する出力側折り返し部材２４の取り付け部を構成している。 The output side member 22 is configured by a flat metal plate that extends from the output side along the central axis Lc of the toroidal core 14 through the toroidal core 14 and extends to the input side. A through hole 30 for connection to an output terminal block (not shown) is formed at the output side end of the output side member 22. The input side end portion 22a of the output side member 22 is bent into an L-shaped cross section so as to be orthogonal to the central axis Lc of the toroidal core 14, and constitutes a mounting portion for the output side folding member 24 described later.

出力側折り返し部材２４は、出力側部材２２の入力側端部２２ａ（取り付け部）から、実装面１２から離間する方向に延びる角柱状の金属板にて構成されている。この出力側折り返し部材２４は、出力側部材２２の入力側端部２２ａに、例えばボルト３２により固定される。入力側部材１８及び出力側部材２２は、入力側及び出力側の端子台の位置、寸法により、一部屈曲させてもよい。これにより、第１コイル１０Ａの取付け位置及び端子台の取付け位置の自由度を向上させることができる。また、入力側部材１８及び出力側部材２２は、出力側端部１８ａ及び入力側端部２２ａを屈曲せずに、入力側折り返し部材２０及び出力側折り返し部材２４を取り付けてもよい。 The output side folding member 24 is configured by a prismatic metal plate extending in a direction away from the mounting surface 12 from the input side end 22 a (attachment portion) of the output side member 22. The output side folding member 24 is fixed to the input side end portion 22 a of the output side member 22 with, for example, a bolt 32. The input side member 18 and the output side member 22 may be partially bent depending on the positions and dimensions of the input side and output side terminal blocks. Thereby, the freedom degree of the attachment position of 10 A of 1st coils, and the attachment position of a terminal block can be improved. Further, the input side folding member 20 and the output side folding member 24 may be attached to the input side member 18 and the output side member 22 without bending the output side end 18a and the input side end 22a.

連結部材２６は、入力側折り返し部材２０と出力側折り返し部材２４とを連結する平板状の金属板にて構成されている。断面積は、上述した入力側部材１８や出力側部材２２の断面積とほぼ同じである。この連結部材２６は、入力側折り返し部材２０の上端面及び出力側折り返し部材２４の上端面にそれぞれ例えばボルト３２により固定される。 The connecting member 26 is configured by a flat metal plate that connects the input side folding member 20 and the output side folding member 24. The cross-sectional area is substantially the same as the cross-sectional areas of the input side member 18 and the output side member 22 described above. The connecting member 26 is fixed to the upper end surface of the input side folding member 20 and the upper end surface of the output side folding member 24 by, for example, bolts 32.

各部材において、電流の流れる方向の大きさ（寸法）を各部材の板面の長さ、それと直交する方向の大きさ（寸法）を各部材の板面の幅としたとき、連結部材２６の板面の幅は、入力側部材１８、入力側折り返し部材２０、出力側部材２２及び出力側折り返し部材２４の各板面の幅より広い。 In each member, when the size (dimension) in the direction of current flow is the length of the plate surface of each member and the size (dimension) in the direction perpendicular to the member is the width of the plate surface of each member, The width of the plate surface is wider than the width of each plate surface of the input side member 18, the input side folded member 20, the output side member 22, and the output side folded member 24.

具体的には、連結部材２６の板面の幅をＷａ（図２参照）、入力側部材１８、入力側折り返し部材２０、出力側部材２２及び出力側折り返し部材２４の各板面の幅のうち、最大の幅をＷｂ（図示せず）としたとき、
Ｗａ≧１．５×Ｗｂ
が好ましく、さらに好ましくは、
Ｗａ≧１．７×Ｗｂ
である。 Specifically, the width of the plate surface of the connecting member 26 is Wa (see FIG. 2), and the width of each plate surface of the input side member 18, the input side folded member 20, the output side member 22, and the output side folded member 24. When the maximum width is Wb (not shown),
Wa ≧ 1.5 × Wb
Is more preferable,
Wa ≧ 1.7 × Wb
It is.

また、トロイダルコア１４の実装面１２において、該実装面１２の長辺と直交する方向の大きさ（寸法）を、実装面１２の幅Ｗｃ（図示せず）としたとき、
Ｗａ≦３×Ｗｃ
である。連結部材２６の板面の幅Ｗａが３×Ｗｃよりも大きくなると、第１コイル１０Ａ全体のサイズが大きくなり、サイズの小型化要請に対応できなくなるからである。 Further, in the mounting surface 12 of the toroidal core 14, when the size (dimension) in the direction orthogonal to the long side of the mounting surface 12 is the width Wc (not shown) of the mounting surface 12,
Wa ≦ 3 × Wc
It is. This is because if the width Wa of the plate surface of the connecting member 26 is larger than 3 × Wc, the size of the entire first coil 10A increases, and it becomes impossible to meet the demand for size reduction.

このように、第１コイル１０Ａにおいては、連結部材２６の板面の幅Ｗａを上述のように広く設定し、連結部材２６の表面積を大きくしたので、連結部材２６での放熱効果が向上し、巻回部１６での温度上昇を抑制することができる。そのため、巻回スペースの狭い箇所で、幅の狭い部材を使用することが可能となる。これは、トロイダルコア１４の径の縮小化及び実装面１２の縮小化につながり、第１コイル１０Ａの小型化並びに実装スペースの省スペース化を促進させることができる。また、簡単な構成を採用しながらも、さらなる大電流化及び小型化の要請に対応することができる。しかも、市販のブスバーの長さ及び一部折り曲げ加工のみで、各部材（入力側部材１８、入力側折り返し部材２０、出力側部材２２、出力側折り返し部材２４、連結部材２６）を構成することができ、加工工数の削減、材料の有効利用を図ることができる。なお、入力側部材１８及び出力側部材２２の配置は上下逆でもよい。 Thus, in the first coil 10A, since the width Wa of the plate surface of the connecting member 26 is set wide as described above and the surface area of the connecting member 26 is increased, the heat dissipation effect at the connecting member 26 is improved. The temperature rise at the winding part 16 can be suppressed. Therefore, it is possible to use a member having a narrow width at a location where the winding space is narrow. This leads to a reduction in the diameter of the toroidal core 14 and a reduction in the mounting surface 12, and can promote the downsizing of the first coil 10A and the saving of the mounting space. In addition, while adopting a simple configuration, it is possible to meet the demand for further increase in current and size. In addition, each member (the input side member 18, the input side folded member 20, the output side member 22, the output side folded member 24, and the connecting member 26) can be configured only by the length and partial folding of the commercially available bus bar. It is possible to reduce processing man-hours and effectively use materials. The arrangement of the input side member 18 and the output side member 22 may be upside down.

次に、第２の実施の形態に係る大電流用コイル（以下、第２コイル１０Ｂと記す）について図３Ａ〜図６Ｂを参照しながら説明する。 Next, a large current coil (hereinafter referred to as a second coil 10B) according to a second embodiment will be described with reference to FIGS. 3A to 6B.

この第２コイル１０Ｂは、二相二線式のチョークコイルの一例を示し、コア数が２のトロイダルコア１４と、２つの巻回部１６（第１巻回部１６Ａ及び第２巻回部１６Ｂ）とを有する。なお、図１と対応する部材については、それぞれ同じ参照符号を付してその重複説明を省略する。 The second coil 10B is an example of a two-phase two-wire choke coil. The toroidal core 14 has two cores and two winding portions 16 (the first winding portion 16A and the second winding portion 16B). ). In addition, about the member corresponding to FIG. 1, the same referential mark is attached | subjected respectively and the duplication description is abbreviate | omitted.

第１巻回部１６Ａは、図３Ａ、図４Ａ〜図６Ｂに示すように、第１入力側部材１８Ａと、第１入力側折り返し部材２０Ａと、第１出力側部材２２Ａと、第１出力側折り返し部材２４Ａと、第１連結部材２６Ａとを有する。 As shown in FIGS. 3A and 4A to 6B, the first winding portion 16A includes a first input side member 18A, a first input side folding member 20A, a first output side member 22A, and a first output side. It has a folding member 24A and a first connecting member 26A.

第１入力側部材１８Ａは、入力側からトロイダルコア１４の中心軸Ｌｃに沿ってトロイダルコア１４内を挿通し、出力側に延びる平板状の金属板にて構成されている。 18 A of 1st input side members are comprised in the toroidal core 14 along the central axis Lc of the toroidal core 14 from the input side, and are comprised by the flat metal plate extended to the output side.

第１入力側折り返し部材２０Ａは、第１入力側部材１８Ａの端部から、実装面１２とほぼ平行な第１方向ｘ１に延びる平板状の金属板にて構成されている。ほぼ平行とは、図３Ｂに示すように、実装面１２の長辺１２ａと平行な線Ｌａと第１方向ｘ１とのなす角θが上方向に０°以上５°以下、下方向に０°以上５°以下の範囲にあることを示す。この第１入力側折り返し部材２０Ａは、第１入力側部材１８Ａの出力側端面に、例えばボルト３２により固定される。 The first input side folding member 20A is configured by a flat metal plate extending from the end of the first input side member 18A in a first direction x1 substantially parallel to the mounting surface 12. 3B, as shown in FIG. 3B, an angle θ formed by a line La parallel to the long side 12a of the mounting surface 12 and the first direction x1 is 0 ° or more and 5 ° or less in the upward direction, and 0 ° in the downward direction. It indicates that it is in the range of 5 ° or less. The first input side folding member 20A is fixed to the output side end face of the first input side member 18A by, for example, a bolt 32.

第１出力側部材２２Ａは、出力側からトロイダルコア１４の中心軸Ｌｃに沿ってトロイダルコア１４内を挿通し、入力側に延びる平板状の金属板にて構成されている。 22 A of 1st output side members are comprised in the toroidal core 14 along the central axis Lc of the toroidal core 14 from the output side, and are comprised by the flat metal plate extended to the input side.

第１出力側折り返し部材２４Ａは、第１出力側部材２２Ａの端部から、上述の第１方向ｘ１に延びる平板状の金属板にて構成されている。この第１出力側折り返し部材２４Ａは、第１出力側部材２２Ａの入力側端面に、例えばボルト３２により固定される。 The first output side folding member 24A is configured by a flat metal plate extending in the first direction x1 from the end of the first output side member 22A. The first output side folding member 24A is fixed to the input side end face of the first output side member 22A by, for example, a bolt 32.

第１連結部材２６Ａは、第１入力側折り返し部材２０Ａと第１出力側折り返し部材２４Ａとを連結する平板状の金属板にて構成されている。断面積は、上述した第１入力側部材１８Ａや第１出力側部材２２Ａの断面積とほぼ同じである。第１連結部材２６Ａは、該第１連結部材２６Ａの入力側の側面と第１入力側折り返し部材２０Ａの出力側主面とが例えばボルト３２によって固定され、さらに、第１連結部材２６Ａの出力側の側面と第１出力側折り返し部材２４Ａの入力側主面とが例えばボルト３２によって固定されることで、第１入力側折り返し部材２０Ａと第１出力側折り返し部材２４Ａとに固定される。 26 A of 1st connection members are comprised by the flat metal plate which connects 20 A of 1st input side folding | returning members, and 24 A of 1st output side folding | returning members. The cross-sectional area is substantially the same as the cross-sectional area of the first input side member 18A and the first output side member 22A described above. In the first connecting member 26A, the side surface on the input side of the first connecting member 26A and the output side main surface of the first input side folding member 20A are fixed by, for example, bolts 32, and further, the output side of the first connecting member 26A Are fixed to the first input-side folding member 20A and the first output-side folding member 24A, for example, by fixing the input-side main surface of the first output-side folding member 24A with a bolt 32.

第２巻回部１６Ｂも、上述した第１巻回部１６Ａと同様の構成を有し、入力側からトロイダルコア１４の中心軸Ｌｃに沿ってトロイダルコア１４内を挿通し、出力側に延びる平板状の金属板による第２入力側部材１８Ｂと、該第２入力側部材１８Ｂの端部から、第１方向ｘ１と反対方向の第２方向ｘ２に延びる平板状の金属板による第２入力側折り返し部材２０Ｂと、出力側からトロイダルコア１４の中心軸Ｌｃに沿ってトロイダルコア１４内を挿通し、入力側に延びる平板状の金属板による第２出力側部材２２Ｂと、該第２出力側部材２２Ｂの端部から、第２方向ｘ２に延びる平板状の金属板による第２出力側折り返し部材２４Ｂと、第２入力側折り返し部材２０Ｂと第２出力側折り返し部材２４Ｂとを連結する平板状の金属板による第２連結部材２６Ｂとを有する。 The second winding portion 16B also has the same configuration as the first winding portion 16A described above, and is a flat plate that extends from the input side through the toroidal core 14 along the central axis Lc of the toroidal core 14 and extends to the output side. Second input-side member 18B made of a metal plate, and a second input-side fold by a flat metal plate extending in the second direction x2 opposite to the first direction x1 from the end of the second input-side member 18B A member 20B, a second output side member 22B made of a flat metal plate extending from the output side along the central axis Lc of the toroidal core 14 and extending to the input side, and the second output side member 22B The flat plate-shaped metal plate which connects the 2nd output side folding member 24B, the 2nd input side folding member 20B, and the 2nd output side folding member 24B by the flat metal plate extended in the 2nd direction x2 from the edge part of this Second by And a binding member 26B.

この場合も、第２入力側折り返し部材２０Ｂは、第２入力側部材１８Ｂの出力側端面に、例えばボルト３２により固定され、第２出力側折り返し部材２４Ｂは、第２出力側部材２２Ｂの入力側端面に、例えばボルト３２により固定される。また、第２連結部材２６Ｂは、該第２連結部材２６Ｂの入力側の側面と第２入力側折り返し部材２０Ｂの出力側主面とが例えばボルト３２によって固定され、さらに、第２連結部材２６Ｂの出力側の側面と第２出力側折り返し部材２４Ｂの入力側主面とが例えばボルト３２によって固定されることで、第２入力側折り返し部材２０Ｂと第２出力側折り返し部材２４Ｂとに固定される。 Also in this case, the second input side folding member 20B is fixed to the output side end face of the second input side member 18B, for example, by a bolt 32, and the second output side folding member 24B is the input side of the second output side member 22B. For example, the bolt 32 is fixed to the end face. The second connecting member 26B has an input side surface of the second connecting member 26B and an output side main surface of the second input side folding member 20B fixed by, for example, a bolt 32. The output side surface and the input side main surface of the second output side folding member 24B are fixed to the second input side folding member 20B and the second output side folding member 24B, for example, by bolts 32.

そして、第１連結部材２６Ａの板面の幅は、第１入力側部材１８Ａ、第１入力側折り返し部材２０Ａ、第１出力側部材２２Ａ及び第１出力側折り返し部材２４Ａの各板面の幅よりも広い。同様に、第２連結部材２６Ｂの板面の幅は、第２入力側部材１８Ｂ、第２入力側折り返し部材２０Ｂ、第２出力側部材２２Ｂ及び第２出力側折り返し部材２４Ｂの各板面の幅よりも広い。 The width of the plate surface of the first connecting member 26A is larger than the width of each plate surface of the first input side member 18A, the first input side folded member 20A, the first output side member 22A, and the first output side folded member 24A. Is also wide. Similarly, the width of the plate surface of the second connecting member 26B is the width of each plate surface of the second input side member 18B, the second input side folded member 20B, the second output side member 22B, and the second output side folded member 24B. Wider than.

具体的には、第１連結部材２６Ａ及び第２連結部材２６Ｂの各板面の幅をＷａ１及びＷａ２（図４Ａ及び図４Ｂ参照）、第１入力側部材１８Ａ、第１入力側折り返し部材２０Ａ、第１出力側部材２２Ａ及び第１出力側折り返し部材２４Ａの各板面の幅のうち、最大の幅をＷｂ１（図示せず）、第２入力側部材１８Ｂ、第２入力側折り返し部材２０Ｂ、第２出力側部材２２Ｂ及び第２出力側折り返し部材２４Ｂの各板面の幅のうち、最大の幅をＷｂ２（図示せず）としたとき、
Ｗａ１≧１．５×Ｗｂ１
Ｗａ２≧１．５×Ｗｂ２
が好ましく、さらに好ましくは、
Ｗａ１≧１．７×Ｗｂ１
Ｗａ２≧１．７×Ｗｂ２
である。 Specifically, the width of each plate surface of the first connecting member 26A and the second connecting member 26B is set to Wa1 and Wa2 (see FIGS. 4A and 4B), the first input side member 18A, the first input side folding member 20A, Among the widths of the plate surfaces of the first output side member 22A and the first output side folding member 24A, the maximum width is Wb1 (not shown), the second input side member 18B, the second input side folding member 20B, Among the widths of the plate surfaces of the two output side members 22B and the second output side folded member 24B, when the maximum width is Wb2 (not shown),
Wa1 ≧ 1.5 × Wb1
Wa2 ≧ 1.5 × Wb2
Is more preferable,
Wa1 ≧ 1.7 × Wb1
Wa2 ≧ 1.7 × Wb2
It is.

また、トロイダルコア１４の実装面１２の幅（コア数＝２を含めた全体の幅）をＷｃ（図６Ｂ参照）としたとき、
Ｗａ１≦３×Ｗｄ
Ｗａ２≦３×Ｗｄ
である。 When the width of the mounting surface 12 of the toroidal core 14 (the total width including the number of cores = 2) is Wc (see FIG. 6B),
Wa1 ≦ 3 × Wd
Wa2 ≦ 3 × Wd
It is.

このように、第２コイル１０Ｂにおいて、第１連結部材２６Ａ及び第２連結部材２６Ｂの各板面の幅Ｗａ１及びＷａ２を上述のように広く設定し、第１連結部材２６Ａ及び第２連結部材２６Ｂの各表面積を大きくしたので、第１連結部材２６Ａ及び第２連結部材２６Ｂでの放熱効果が向上し、第１巻回部１６Ａ及び第２巻回部１６Ｂでの温度上昇を抑制することができる。そのため、巻回スペースの狭い箇所で、幅の狭い部材を使用することが可能となる。これは、トロイダルコア１４の径の縮小化及び実装面１２の縮小化につながり、第２コイル１０Ｂの小型化並びに実装スペースの省スペース化を促進させることができる。また、簡単な構成を採用しながらも、さらなる大電流化及び小型化の要請に対応することができる。しかも、市販のブスバーの長さ及び一部折り曲げ加工のみで、各部材を構成することができ、加工工数の削減、材料の有効利用を図ることができる。 As described above, in the second coil 10B, the widths Wa1 and Wa2 of the plate surfaces of the first connecting member 26A and the second connecting member 26B are set wide as described above, and the first connecting member 26A and the second connecting member 26B are set. Since each surface area is increased, the heat dissipation effect in the first connecting member 26A and the second connecting member 26B is improved, and the temperature rise in the first winding part 16A and the second winding part 16B can be suppressed. . Therefore, it is possible to use a member having a narrow width at a location where the winding space is narrow. This leads to a reduction in the diameter of the toroidal core 14 and a reduction in the mounting surface 12, and can promote the downsizing of the second coil 10B and the space saving of the mounting space. In addition, while adopting a simple configuration, it is possible to meet the demand for further increase in current and size. In addition, each member can be configured only by the length and partial bending of a commercially available bus bar, and the number of processing steps can be reduced and the material can be effectively used.

特に、第２コイル１０Ｂにおいては、第１連結部材２６Ａ及び第２連結部材２６Ｂを、トロイダルコア１４の上面（又は実装面）に対向する部分ではなく、トロイダルコア１４の側面に対向する部分に配置することができるため、トロイダルコア１４の実装面１２のうち、コアの配列方向と直交する辺の長さ（長辺１２ａ）及びトロイダルコア１４の高さを短くすることが可能となり、実装面１２の面積をさらに縮小化でき、第２コイル１０Ｂの小型化並びに実装スペースの省スペース化をさらに促進させることができる。図５Ａ及び図５Ｂでは、トロイダルコア１４の実装面１２の長辺１２ａを短くした例を示す。 In particular, in the second coil 10 </ b> B, the first connecting member 26 </ b> A and the second connecting member 26 </ b> B are disposed not on the portion facing the upper surface (or mounting surface) of the toroidal core 14 but on the portion facing the side surface of the toroidal core 14. Therefore, among the mounting surface 12 of the toroidal core 14, the length of the side (long side 12a) orthogonal to the arrangement direction of the cores and the height of the toroidal core 14 can be shortened. Can be further reduced, and further downsizing of the second coil 10B and space saving of the mounting space can be further promoted. 5A and 5B show an example in which the long side 12a of the mounting surface 12 of the toroidal core 14 is shortened.

次に、第３の実施の形態に係る大電流用コイル（以下、第３コイル１０Ｃと記す）について図７〜図１０Ｂを参照しながら説明する。 Next, a large current coil (hereinafter referred to as a third coil 10C) according to a third embodiment will be described with reference to FIGS.

この第３コイル１０Ｃは、上述した第２コイル１０Ｂとほぼ同様の構成を有するが、第１巻回部１６Ａにおける第１入力側部材１８Ａと第１入力側折り返し部材２０Ａとが一体化されて構成され、同様に、第１出力側部材２２Ａと第１出力側折り返し部材２４Ａとが一体化されて構成され、第２巻回部１６Ｂにおける第２入力側部材１８Ｂと第２入力側折り返し部材２０Ｂとが一体化されて構成され、同様に、第２出力側部材２２Ｂと第２出力側折り返し部材２４Ｂとが一体化されて構成されている点で異なる。 The third coil 10C has substantially the same configuration as the second coil 10B described above, but is configured by integrating the first input side member 18A and the first input side folding member 20A in the first winding portion 16A. Similarly, the first output side member 22A and the first output side folding member 24A are integrally formed, and the second input side member 18B and the second input side folding member 20B in the second winding portion 16B are configured. Similarly, the second output side member 22B and the second output side folding member 24B are differently configured in an integrated manner.

具体的には、第１入力側部材１８Ａ、第１出力側部材２２Ａ、第２入力側部材１８Ｂ及び第２出力側部材２２Ｂの各長さが第２コイル１０Ｂの場合よりもそれぞれ長く設定されている。そして、第１入力側部材１８Ａの出力側端部及び第１出力側部材２２Ａの入力側端部が、それぞれ第１方向ｘ１に向くように断面Ｌ字状に屈曲され、これら屈曲された部分が第１入力側折り返し部材２０Ａ及び第１出力側折り返し部材２４Ａとして構成される。同様に、第２入力側部材１８Ｂの出力側端部及び第２出力側部材２２Ｂの入力側端部が、それぞれ第２方向ｘ２に向くように断面Ｌ字状に屈曲され、これら屈曲された部分が第２入力側折り返し部材２０Ｂ及び第２出力側折り返し部材２４Ｂとして構成される。 Specifically, each length of the first input side member 18A, the first output side member 22A, the second input side member 18B, and the second output side member 22B is set longer than that of the second coil 10B. Yes. The output-side end portion of the first input-side member 18A and the input-side end portion of the first output-side member 22A are bent in an L-shaped cross section so as to face the first direction x1, respectively. The first input side folding member 20A and the first output side folding member 24A are configured. Similarly, the output side end of the second input side member 18B and the input side end of the second output side member 22B are bent in an L-shaped cross section so as to face the second direction x2, respectively, and these bent portions Are configured as a second input-side folding member 20B and a second output-side folding member 24B.

この第３コイル１０Ｃにおいては、上述した第２コイル１０Ｂと同様の効果を有し、トロイダルコア１４の実装面１２の長辺１２ａ及びトロイダルコア１４の高さを短くすることが可能となり、実装面１２の面積をさらに縮小化でき、第２コイル１０Ｂの小型化並びに実装スペースの省スペース化をさらに促進させることができる。図９Ａ及び図９Ｂでは、トロイダルコア１４の高さを短くした例を示す。特に、この第３コイル１０Ｃでは、ボルト３２の部品点数を減らすことができるため、コストの低減に有利である。 The third coil 10C has the same effect as that of the second coil 10B described above, and it is possible to shorten the long side 12a of the mounting surface 12 of the toroidal core 14 and the height of the toroidal core 14, and the mounting surface. The area of 12 can be further reduced, and the downsizing of the second coil 10B and the space saving of the mounting space can be further promoted. 9A and 9B show an example in which the height of the toroidal core 14 is shortened. In particular, the third coil 10C is advantageous in reducing the cost because the number of parts of the bolt 32 can be reduced.

次に、第４の実施の形態に係る大電流用コイル（以下、第４コイル１０Ｄと記す）について図１１〜図１４Ｂを参照しながら説明する。 Next, a large current coil (hereinafter referred to as a fourth coil 10D) according to a fourth embodiment will be described with reference to FIGS.

この第４コイル１０Ｄは、三相三線式のチョークコイルの一例を示し、コア数が２のトロイダルコア１４と、３つの巻回部１６（第１巻回部１６Ａ〜第３巻回部１６Ｃ）とを有する。なお、図２、図７〜図１０Ｂと対応する部材については、それぞれ同じ参照符号を付してその重複説明を省略する。 The fourth coil 10D is an example of a three-phase three-wire choke coil, and has a toroidal core 14 having two cores and three winding portions 16 (first winding portion 16A to third winding portion 16C). And have. In addition, about the member corresponding to FIG. 2, FIG. 7-10B, the same referential mark is attached | subjected respectively and the duplication description is abbreviate | omitted.

第１巻回部１６Ａは、上述した第３コイル１０Ｃにおける第１巻回部１６Ａと同じ構成を有し、第１入力側部材１８Ａと第１入力側折り返し部材２０Ａとが一体化され、第１出力側部材２２Ａと第１出力側折り返し部材２４Ａとが一体化されている。第２巻回部１６Ｂも、第３コイル１０Ｃにおける第２巻回部１６Ｂと同じ構成を有し、第２入力側部材１８Ｂと第２入力側折り返し部材２０Ｂとが一体化され、第２出力側部材２２Ｂと第２出力側折り返し部材２４Ｂとが一体化されている。 The first winding portion 16A has the same configuration as the first winding portion 16A in the third coil 10C described above, and the first input side member 18A and the first input side folding member 20A are integrated, and the first winding portion 16A is integrated. The output side member 22A and the first output side folding member 24A are integrated. The second winding portion 16B also has the same configuration as the second winding portion 16B in the third coil 10C, and the second input side member 18B and the second input side folding member 20B are integrated, and the second output side The member 22B and the second output side folding member 24B are integrated.

第３巻回部１６Ｃは、上述した図２の第１コイル１０Ａにおける巻回部１６と同じ構成を有し、入力側からトロイダルコア１４の中心軸Ｌｃに沿ってトロイダルコア１４内を挿通し、出力側に延びる第３入力側部材１８Ｃと、該第３入力側部材１８Ｃの端部から、実装面１２から離間する方向に延びる第３入力側折り返し部材２０Ｃと、出力側からトロイダルコア１４の中心軸Ｌｃに沿ってトロイダルコア１４内を挿通し、入力側に延びる第３出力側部材２２Ｃと、該第３出力側部材２２Ｃの端部から、実装面１２から離間する方向に延びる第３出力側折り返し部材２４Ｃと、第３入力側折り返し部材２０Ｃと第３出力側折り返し部材２４Ｃとを連結する第３連結部材２６Ｃとを有する。 The third winding portion 16C has the same configuration as the winding portion 16 in the first coil 10A of FIG. 2 described above, and is inserted through the toroidal core 14 along the central axis Lc of the toroidal core 14 from the input side. The third input side member 18C extending to the output side, the third input side folding member 20C extending from the end of the third input side member 18C in a direction away from the mounting surface 12, and the center of the toroidal core 14 from the output side A third output side member 22C extending through the toroidal core 14 along the axis Lc and extending toward the input side, and a third output side extending in a direction away from the mounting surface 12 from the end of the third output side member 22C The folding member 24C includes a third connecting member 26C that couples the third input-side folding member 20C and the third output-side folding member 24C.

第３連結部材２６Ｃの板面の幅は、第３入力側部材１８Ｃ、第３入力側折り返し部材２０Ｃ、第３出力側部材２２Ｃ及び第３出力側折り返し部材２４Ｃの各板面の幅よりも広い。具体的には、第３連結部材２６Ｃの板面の幅をＷａ３（図１４Ａ参照）、第３入力側部材１８Ｃ、第３入力側折り返し部材２０Ｃ、第３出力側部材２２Ｃ及び第３出力側折り返し部材２４Ｃの各板面の幅のうち、最大の幅をＷｂ３としたとき、
Ｗａ３≧１．５×Ｗｂ３
が好ましく、さらに好ましくは、
Ｗａ３≧１．７×Ｗｂ３
である。 The width of the plate surface of the third connecting member 26C is wider than the width of each plate surface of the third input side member 18C, the third input side folded member 20C, the third output side member 22C, and the third output side folded member 24C. . Specifically, the width of the plate surface of the third connecting member 26C is Wa3 (see FIG. 14A), the third input side member 18C, the third input side folding member 20C, the third output side member 22C, and the third output side folding. Of the widths of the plate surfaces of the member 24C, when the maximum width is Wb3,
Wa3 ≧ 1.5 × Wb3
Is more preferable,
Wa3 ≧ 1.7 × Wb3
It is.

また、トロイダルコア１４の実装面１２の幅（コア数＝２を含めた全体の面積）をＷｃ（図１４Ｂ参照）としたとき、
Ｗａ３≦３×Ｗｃ
である。 Further, when the width of the mounting surface 12 of the toroidal core 14 (the entire area including the number of cores = 2) is Wc (see FIG. 14B),
Wa3 ≦ 3 × Wc
It is.

このように、第４コイル１０Ｄにおいて、第１連結部材２６Ａ〜第３連結部材２６Ｃの各板面の幅Ｗａ１〜Ｗａ３を上述のように広く設定し、第１連結部材２６Ａ〜第３連結部材２６Ｃの各表面積を大きくしたので、第１連結部材２６Ａ〜第３連結部材２６Ｃでの放熱効果が向上し、第１巻回部１６Ａ〜第３巻回部１６Ｃでの温度上昇を抑制することができる。そのため、巻回スペースの狭い箇所で、幅の狭い部材を使用することが可能となる。これは、トロイダルコア１４の径の縮小化及び実装面１２の縮小化につながり、第４コイル１０Ｄの小型化並びに実装スペースの省スペース化を促進させることができる。また、簡単な構成を採用しながらも、さらなる大電流化及び小型化の要請に対応することができる。しかも、市販のブスバーの長さ及び一部折り曲げ加工のみで、各部材を構成することができ、加工工数の削減、材料の有効利用を図ることができる。また、第１巻回部１６Ａ及び第２巻回部１６Ｂが第３コイル１０Ｃと同様の構成を有するため、トロイダルコア１４の高さを小さくすることができ、しかも、ボルトの部品点数を減らすことができるため、コストの低減に有利である。もちろん、第１巻回部１６Ａ及び第２巻回部１６Ｂの構成を第２コイル１０Ｂと同様の構成を有するようにしてもよい。 As described above, in the fourth coil 10D, the widths Wa1 to Wa3 of the plate surfaces of the first connecting member 26A to the third connecting member 26C are set wide as described above, and the first connecting member 26A to the third connecting member 26C. Therefore, the heat dissipation effect in the first connecting member 26A to the third connecting member 26C is improved, and the temperature rise in the first winding part 16A to the third winding part 16C can be suppressed. . Therefore, it is possible to use a member having a narrow width at a location where the winding space is narrow. This leads to a reduction in the diameter of the toroidal core 14 and a reduction in the mounting surface 12, and can promote the downsizing of the fourth coil 10D and the saving of the mounting space. In addition, while adopting a simple configuration, it is possible to meet the demand for further increase in current and size. In addition, each member can be configured only by the length and partial bending of a commercially available bus bar, and the number of processing steps can be reduced and the material can be effectively used. Moreover, since the 1st winding part 16A and the 2nd winding part 16B have the same structure as the 3rd coil 10C, the height of the toroidal core 14 can be made small, and also the number of parts of a bolt can be reduced. This is advantageous in reducing costs. Of course, the configuration of the first winding part 16A and the second winding part 16B may be the same as that of the second coil 10B.

実施例１及び２と比較例について、周波数５０／６０Ｈｚ、振幅１０００Ａの電流を流し、そのときの発熱温度（温度差）を測定した。発熱温度は、測定開始から温度がほぼ一定になった段階の温度と、測定開始時の温度との差（温度差）を採用した。 About Example 1 and 2 and a comparative example, the electric current of frequency 50 / 60Hz and the amplitude of 1000 A was sent, and the heat_generation | fever temperature (temperature difference) at that time was measured. As the exothermic temperature, the difference (temperature difference) between the temperature at which the temperature became almost constant from the start of measurement and the temperature at the start of measurement was adopted.

（実施例１）
実施例１に係るコイルは、図２に示す第１コイル１０Ａと同様の構成を有し、連結部材２６の板面の幅Ｗａと、入力側部材１８、入力側折り返し部材２０、出力側部材２２及び出力側折り返し部材２４の各板面の幅のうち、最大の幅をＷｂとの関係が
Ｗａ／Ｗｂ＝１．５
である。 Example 1
The coil according to the first embodiment has the same configuration as the first coil 10A shown in FIG. 2, and includes the width Wa of the plate surface of the connecting member 26, the input side member 18, the input side folding member 20, and the output side member 22. Of the widths of the plate surfaces of the output side folding member 24, the maximum width is related to Wb. Wa / Wb = 1.5
It is.

（実施例２）
幅Ｗａ及びＷｂの関係が、
Ｗａ／Ｗｂ＝１．７
である点以外は、実施例１と同じである。 (Example 2)
The relationship between the widths Wa and Wb is
Wa / Wb = 1.7
Except for this point, the second embodiment is the same as the first embodiment.

（比較例）
幅Ｗａ及びＷｂの関係が、
Ｗａ／Ｗｂ＝１．０
である点以外は、実施例１と同じである。 (Comparative example)
The relationship between the widths Wa and Wb is
Wa / Wb = 1.0
Except for this point, the second embodiment is the same as the first embodiment.

発熱温度（温度差）の測定結果を下記表１に示す。 The measurement results of the exothermic temperature (temperature difference) are shown in Table 1 below.

表１から、Ｗａ／Ｗｂの値が大きくなるほど発熱温度が下がっていることがわかる。実施例１では、発熱温度が５１．５［℃］であり、比較例の５５．２［℃］と比して放熱効果が高く、巻回部１６での温度上昇を抑制することができていることがわかる。従って、Ｗａ／Ｗｂ≧１．５であれば、巻回スペースの狭い箇所で、幅の狭い部材を使用することが可能となる。さらに好ましくはＷａ／Ｗｂ≧１．７である。これにより、トロイダルコア１４の径の縮小化及び実装面１２の縮小化につながり、本実施の形態に係る大電流用コイル１０の小型化並びに実装スペースの省スペース化を促進させることができる。しかし、連結部材２６の板面の幅Ｗａがあまりに大きくなると、コイル全体のサイズが大きくなることから、トロイダルコア１４の実装面１２の幅の３倍以下にすることが好ましい。 From Table 1, it can be seen that the heat generation temperature decreases as the value of Wa / Wb increases. In Example 1, the heat generation temperature is 51.5 [° C.], and the heat dissipation effect is higher than that of 55.2 [° C.] in the comparative example, and the temperature rise at the winding part 16 can be suppressed. I understand that. Therefore, when Wa / Wb ≧ 1.5, it is possible to use a member having a narrow width at a narrow winding space. More preferably, Wa / Wb ≧ 1.7. This leads to a reduction in the diameter of the toroidal core 14 and a reduction in the mounting surface 12, and can promote a reduction in size and a reduction in mounting space of the large current coil 10 according to the present embodiment. However, if the width Wa of the plate surface of the connecting member 26 becomes too large, the size of the entire coil becomes large. Therefore, it is preferable that the width of the mounting surface 12 of the toroidal core 14 is three times or less.

なお、本発明に係る大電流用コイルは、上述の実施の形態に限らず、本発明の要旨を逸脱することなく、種々の構成を採り得ることはもちろんである。 The large current coil according to the present invention is not limited to the above-described embodiment, but can of course have various configurations without departing from the gist of the present invention.

１０…大電流用コイル１０Ａ〜１０Ｄ…第１コイル〜第４コイル
１２…実装面１４…トロイダルコア
１６…巻回部１８…入力側部材
１８Ａ〜１８Ｃ…第１入力側部材〜第３入力側部材
２０…入力側折り返し部材
２０Ａ〜２０Ｃ…第１入力側折り返し部材〜第３入力側折り返し部材
２２…出力側部材
２２Ａ〜２２Ｃ…第１出力側部材〜第３出力側部材
２４…出力側折り返し部材
２４Ａ〜２４Ｃ…第１出力側折り返し部材〜第３出力側折り返し部材
２６…連結部材
２６Ａ〜２６Ｃ…第１連結部材〜第３連結部材 DESCRIPTION OF SYMBOLS 10 ... Coil for large currents 10A-10D ... 1st coil-4th coil 12 ... Mounting surface 14 ... Toroidal core 16 ... Winding part 18 ... Input side member 18A-18C ... 1st input side member-3rd input side member DESCRIPTION OF SYMBOLS 20 ... Input side folding member 20A-20C ... 1st input side folding member-3rd input side folding member 22 ... Output side member 22A-22C ... 1st output side member-3rd output side member 24 ... Output side folding member 24A -24C: first output side folding member to third output side folding member 26: coupling members 26A-26C: first coupling member to third coupling member

Claims

In a large current coil having a toroidal core having a mounting surface and two or more winding portions wound around the toroidal core,
The winding part has a first winding part and a second winding part,
The first winding part is
A first input member extending from the input side along the central axis of the toroidal core through the toroidal core and extending to the output side;
A first input-side folded member extending in a first direction substantially parallel to the mounting surface from an end of the first input-side member;
A first output side member extending from the output side along the central axis of the toroidal core through the toroidal core and extending to the input side;
A first output side folding member extending in the first direction from an end of the first output side member;
A first connecting member that connects the first input-side folded member and the first output-side folded member;
The second winding part is
A second input side member extending from the input side along the central axis of the toroidal core through the toroidal core and extending to the output side;
A second input-side folding member extending from an end of the second input-side member in a second direction opposite to the first direction;
A second output side member extending from the output side along the central axis of the toroidal core through the toroidal core and extending to the input side;
A second output side folding member extending in the second direction from an end of the second output side member;
A second connecting member that connects the second input-side folded member and the second output-side folded member;
The width of the plate surface of the first connecting member in the first winding part is determined by each of the first input side member, the first input side folded member, the first output side member, and the first output side folded member. Wider than the width of the plate surface,
The width of the plate surface of the second connecting member in the second winding part is the width of each of the second input side member, the second input side folded member, the second output side member, and the second output side folded member. A large current coil characterized by being wider than the width of the plate surface.

The high current coil according to claim 1,
The winding part further has a third winding part,
A third input side member extending from the input side through the toroidal core along the central axis of the toroidal core and extending to the output side;
A third input-side folded member extending from the end of the third input-side member in a direction away from the mounting surface;
A third output side member extending from the output side through the inside of the toroidal core along the central axis of the toroidal core and extending to the input side;
A third output-side folding member extending from the end of the third output-side member in a direction away from the mounting surface;
A third connecting member that connects the third input side folding member and the third output side folding member;
The width of the plate surface of the third connecting member is wider than the width of each plate surface of the third input side member, the third input side folded member, the third output side member, and the third output side folded member. A large current coil.

The large current coil according to claim 1 or 2,
When the width of the plate surface of the connecting member is Wa, the maximum width of the plate surfaces of the input side member, the input side folded member, the output side member and the output side folded member is Wb,
Wa ≧ 1.5 × Wb
A coil for large current, which is characterized by

The high current coil according to claim 3,
Wa ≧ 1.7 × Wb
A coil for large current, which is characterized by

The large current coil according to claim 3 or 4,
When the width of the mounting surface is Wc,
Wa ≦ 3 × Wc
A coil for large current, which is characterized by

The large current coil according to any one of claims 1 to 5,
The input side member and the input side folded member are integrated,
The large current coil, wherein the output side member and the output side folded member are integrated.