JP2009147041A - Reactor - Google Patents

Reactor Download PDF

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JP2009147041A
JP2009147041A JP2007321537A JP2007321537A JP2009147041A JP 2009147041 A JP2009147041 A JP 2009147041A JP 2007321537 A JP2007321537 A JP 2007321537A JP 2007321537 A JP2007321537 A JP 2007321537A JP 2009147041 A JP2009147041 A JP 2009147041A
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reactor
heat
coil
mounting portion
heat radiating
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JP4924949B2 (en
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Takuji Kozu
卓司 神頭
Kazuhiko Futai
和彦 二井
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • 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
    • H01F27/08—Cooling; Ventilating
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformer Cooling (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reactor having high radiation performance. <P>SOLUTION: The reactor 1 has a core 2, having coil winding portions opposed to each other and forming a closed magnetic circuit and a coil 3 formed by winding a winding on the coil winding portions. The coil 3 has a setting surface 3i, positioned a mounting portion L side, on which the reactor is mounted and a fixing surface 3o positioned on a side opposite to the mounting surface. A radiating member 4 is arranged on the mounting surface 3o. According to this constitution, heat can be conducted from a portion of the coil 3 positioned on the side opposite to the mounting portion L, from which radiating could not be carried out conventionally on the radiating member 4, and the radiation performance of the reactor can be enhanced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ハイブリッド自動車や電気自動車においてコンバータの構成部品などに利用されるリアクトルに関する。   The present invention relates to a reactor used as a component of a converter in a hybrid vehicle or an electric vehicle.

従来、磁性材料からなるコアとこのコアに巻線を巻回してなるコイルとを備えるリアクトルが知られている。ハイブリッド自動車などに利用される、大型で、大電流で使用されるリアクトルの場合、コアとコイルの発熱量が大きくなるので、放熱性能を高くする必要がある。   Conventionally, a reactor including a core made of a magnetic material and a coil formed by winding a winding around the core is known. In the case of a large-sized reactor used for a hybrid vehicle or the like and used with a large current, the heat generation amount of the core and the coil is increased, so that it is necessary to improve the heat dissipation performance.

一般的なリアクトルの構造としては、開口部を有するアルミケース内にリアクトルを収容し、アルミケース内に樹脂を注入してリアクトルを封入する構造が採用されている。このようなリアクトルでは、リアクトルで発生した熱を樹脂、アルミケースを経由して外部に放熱している。   As a general reactor structure, a structure is adopted in which a reactor is accommodated in an aluminum case having an opening, and a resin is injected into the aluminum case to enclose the reactor. In such a reactor, heat generated in the reactor is radiated to the outside through a resin and an aluminum case.

また、アルミケースを省略した構造のリアクトルも提案されている（例えば、特許文献１,２を参照）。特許文献１には、保持部を有する台座上にコアの両端を固定し、樹脂でモールドした構造のリアクトルが開示されている。特許文献２には、コアから冷却器に向けて突出する伝熱部を備え、リアクトルの周囲を樹脂部で覆うと共に、この樹脂部を冷却器に固定することで冷却器上に直接搭載した構造のリアクトルが開示されている。特許文献２に記載のリアクトルでは、ケースだけでなく台座も省略している。   A reactor having a structure in which an aluminum case is omitted has also been proposed (see, for example, Patent Documents 1 and 2). Patent Document 1 discloses a reactor having a structure in which both ends of a core are fixed on a pedestal having a holding portion and molded with resin. Patent Document 2 includes a heat transfer portion that protrudes from the core toward the cooler, covers the periphery of the reactor with a resin portion, and is mounted directly on the cooler by fixing the resin portion to the cooler. The reactor is disclosed. In the reactor described in Patent Document 2, not only the case but also the pedestal is omitted.

特開２００４‐９５５７０号公報JP 2004-95570 A 特開２００７‐１８０２２４号公報JP 2007-180224 A

しかし、最近では、リアクトルをより大電流で使用する傾向にあり、リアクトルの更なる放熱性能の向上が求められている。   However, recently, there is a tendency to use the reactor with a larger current, and further improvement of the heat dissipation performance of the reactor is demanded.

従来のリアクトルでは、コイルの周囲が樹脂で覆われた構造であり、リアクトルが搭載される搭載部（アルミケースの底板、台座、冷却器を含む）と反対側に位置するコイルの一部分は、搭載部から離れているため、搭載部を介して外部に放熱することが難しい。   The conventional reactor has a structure in which the coil is covered with resin, and a part of the coil located on the opposite side of the mounting part (including the bottom plate of the aluminum case, pedestal, and cooler) is mounted. Since it is away from the part, it is difficult to radiate heat to the outside through the mounting part.

本発明は、上記事情に鑑みてなされたもので、その目的の一つは、放熱性能が高いリアクトルを提供することにある。   The present invention has been made in view of the above circumstances, and one of its purposes is to provide a reactor having high heat dissipation performance.

本発明のリアクトルは、対向し合うコイル巻回部を有し、閉磁路を形成するコアと、前記コイル巻回部に巻線を巻回してなるコイルとを備える。そして、コイルは、リアクトルが搭載される搭載部側に位置する設置面と、この設置面の反対側に位置する取り付け面とを有しており、この取り付け面に放熱部材が配設されていることを特徴とする。   The reactor of this invention has the coil winding part which opposes, and is provided with the core which forms a closed magnetic circuit, and the coil formed by winding a coil | winding around the said coil winding part. And the coil has the installation surface located in the mounting part side in which a reactor is mounted, and the attachment surface located in the other side of this installation surface, and the thermal radiation member is arrange | positioned by this attachment surface. It is characterized by that.

この構成によれば、従来放熱することが難しかった搭載部と反対側に位置するコイルの一部分から放熱部材に熱を伝導させることができるので、リアクトルの放熱性能を高めることができる。   According to this configuration, heat can be conducted to the heat radiating member from a part of the coil located on the side opposite to the mounting portion, which has conventionally been difficult to radiate heat, so that the heat radiating performance of the reactor can be enhanced.

本発明のより好ましい形態は、放熱部材が搭載部側に延びる熱伝導部材を有し、この熱伝導部材が搭載部に固定されている構成である。   In a more preferred embodiment of the present invention, the heat dissipating member has a heat conducting member extending toward the mounting portion, and the heat conducting member is fixed to the mounting portion.

この構成によれば、放熱部材が吸収した熱を、熱伝導部材を介して搭載部に伝導させることができるので、放熱部材の冷却性能を高め、リアクトルの放熱性能をより高めることができる。また、熱伝導部材を搭載部に固定することで、コイルの取り付け面が放熱部材により押し付けられ、外部振動の影響によりリアクトルが搭載部から外れたりずれたりすることを防止できる。   According to this configuration, the heat absorbed by the heat radiating member can be conducted to the mounting portion via the heat conducting member, so that the cooling performance of the heat radiating member can be enhanced and the heat radiating performance of the reactor can be further enhanced. Further, by fixing the heat conducting member to the mounting portion, it is possible to prevent the attachment surface of the coil from being pressed by the heat radiating member, and the reactor from being detached from the mounting portion or displaced due to the influence of external vibration.

本発明のより好ましい形態は、熱伝導部材がコイル巻回部に巻回された対向し合うコイル間の間隙に挿通するように配置されている構成である。   A more preferable embodiment of the present invention is a configuration in which the heat conducting member is disposed so as to be inserted into a gap between the opposing coils wound around the coil winding portion.

コイル同士が対向し合う箇所は、熱がこもり易く放熱効率が低いので、この箇所の熱を効率的に放熱させることが好ましい。そこで、熱伝導部材をコイル間の間隙に挿通するように配置することで、コイル同士が対向し合う箇所の熱を熱伝導部材に伝導させ、熱伝導部材が吸収した熱を搭載部に伝導させることができるので、リアクトルの放熱性能をより高めることができる。   Since the location where the coils face each other is easy to accumulate heat and the heat dissipation efficiency is low, it is preferable to efficiently dissipate the heat at this location. Therefore, by arranging the heat conducting member so as to be inserted into the gap between the coils, the heat of the portion where the coils face each other is conducted to the heat conducting member, and the heat absorbed by the heat conducting member is conducted to the mounting portion. Therefore, the heat dissipation performance of the reactor can be further enhanced.

本発明のより好ましい形態は、放熱部材が表面に放熱フィンを有する構成である。   A more preferable embodiment of the present invention is a configuration in which the heat dissipation member has heat dissipation fins on the surface.

放熱部材の表面に放熱フィンを設けることで、放熱部材の冷却性能を高めることができるので、リアクトルの放熱性能をより高めることができる。   Since the cooling performance of the heat radiating member can be enhanced by providing the heat radiating fins on the surface of the heat radiating member, the heat radiating performance of the reactor can be further enhanced.

本発明のより好ましい形態は、コアのコイル巻回部以外の箇所において、搭載部側のコアの設置面がコイルの設置面と面一になっている構成である。   A more preferable embodiment of the present invention is a configuration in which the installation surface of the core on the mounting portion side is flush with the installation surface of the coil in a portion other than the coil winding portion of the core.

この構成によれば、コアが搭載部に直接接触し、コアの熱を搭載部に直接伝導させることができるので、リアクトルの放熱性能をより高めることができる。   According to this configuration, since the core can be in direct contact with the mounting portion and the heat of the core can be directly conducted to the mounting portion, the heat dissipation performance of the reactor can be further enhanced.

本発明のより好ましい形態は、コアのコイル巻回部以外の箇所において、搭載部と反対側の面が放熱部材と接触している構成である。   A more preferable form of the present invention is a configuration in which the surface opposite to the mounting portion is in contact with the heat radiating member at a portion other than the coil winding portion of the core.

この構成によれば、搭載部と反対側に位置するコアの一部分からも放熱部材に熱を伝導させることができるので、リアクトルの放熱性能をより高めることができる。   According to this configuration, heat can be conducted from the part of the core located on the side opposite to the mounting portion to the heat radiating member, so that the heat dissipation performance of the reactor can be further improved.

本発明のリアクトルは、搭載部と反対側に位置するコイルの取り付け面に放熱部材が配設されているので、コイルで発生した熱を効果的に放熱することができ、リアクトルの放熱性能を高めることができる。   In the reactor according to the present invention, the heat dissipating member is disposed on the mounting surface of the coil located on the side opposite to the mounting portion. Therefore, the heat generated in the coil can be effectively dissipated, and the heat dissipating performance of the reactor is improved. be able to.

以下、本発明の実施の形態を図を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

＜実施例１＞
図１は、本発明の実施例１に係るリアクトルの概略斜視図、図２は、このリアクトルの側面図、図３は、このリアクトルの分解斜視図である。 <Example 1>
1 is a schematic perspective view of a reactor according to a first embodiment of the present invention, FIG. 2 is a side view of the reactor, and FIG. 3 is an exploded perspective view of the reactor.

リアクトル1は、コイル巻回部を有し、閉磁路を形成するコア2と、このコイル巻回部に巻線を巻回してなるコイル3と、コイル3に配設された放熱部材4とを備える。また、搭載部Lは、リアクトル1が搭載される部材である。   The reactor 1 includes a coil 2 having a coil winding portion and forming a closed magnetic path, a coil 3 formed by winding a coil around the coil winding portion, and a heat radiating member 4 disposed in the coil 3. Prepare. The mounting portion L is a member on which the reactor 1 is mounted.

コア2は、対向し合う直線状部分と、各直線状部分の端部同士を繋ぐU字状部分とからなる環状の部材であり、各直線状部分がコイル巻回部となる。その他、別形状のコアとして、例えば円環状のコアを用いることができ、この場合も対向する部分がコイル巻回部となる。   The core 2 is an annular member composed of opposing linear portions and U-shaped portions connecting the ends of the linear portions, and each linear portion serves as a coil winding portion. In addition, for example, an annular core can be used as the core having another shape. In this case as well, the facing portion becomes the coil winding portion.

このコア2は、磁性材料からなり、ケイ素鋼板を積層した積層体や、鉄粉等の磁性粉末の表面に絶縁被覆を施し、この粉末を加圧成形した圧粉成形体を用いることができる。また、コア2において、コアの磁気特性を調整するために、一部にギャップを形成してもよい。このギャップは、ガラスエポキシ樹脂やアルミナなどの非磁性材料で構成することができる。   The core 2 is made of a magnetic material, and a laminated body in which silicon steel plates are laminated, or a compacted body in which a surface of a magnetic powder such as iron powder is coated with an insulating coating and the powder is pressure-molded can be used. Further, in the core 2, a gap may be formed in part in order to adjust the magnetic characteristics of the core. The gap can be made of a nonmagnetic material such as glass epoxy resin or alumina.

コイル3は、巻線を巻回することで形成されており、巻線には、表面に絶縁被覆を有する丸線や平角線を用いることができる。特に、平角線をエッジワイズ巻きしたコイルは、丸線を用いたコイルより占積率がよく、好適である。また、コイル3は、搭載部L側に位置する設置面3iと、この設置面の反対側に位置する取り付け面3oとを有している。   The coil 3 is formed by winding a winding, and a round wire or a rectangular wire having an insulating coating on the surface can be used for the winding. In particular, a coil in which a rectangular wire is wound edgewise is preferable because it has a higher space factor than a coil using a round wire. The coil 3 has an installation surface 3i located on the mounting portion L side and an attachment surface 3o located on the opposite side of the installation surface.

また、上記コア2は、U字状部分において、搭載部L側の設置面2iが突出しており、この設置面2iがコイル3の設置面3iと面一になっている。そのため、コア2の設置面2iが搭載部Lに直接接触し、コア2の熱を搭載部Lに直接伝導させることができる。   Further, the core 2 has a U-shaped portion with a mounting surface 2i on the mounting portion L side projecting, and the installation surface 2i is flush with the installation surface 3i of the coil 3. Therefore, the installation surface 2i of the core 2 can be in direct contact with the mounting portion L, and the heat of the core 2 can be directly conducted to the mounting portion L.

放熱部材4は、コイル3の取り付け面3oに配設され、搭載部Lと反対側に位置するコイル3の一部分からの熱を受熱して放熱する部材である。この放熱部材4は、アルミナ製の平板状であり、例えばエポキシ系の接着剤などによりコイル3に固定されている。また、放熱部材4は、平板状とする他、ブロック状など種々の形状とすることができる。   The heat dissipating member 4 is a member that is disposed on the attachment surface 3o of the coil 3 and receives heat from a part of the coil 3 located on the side opposite to the mounting portion L to dissipate it. The heat radiating member 4 has a flat plate shape made of alumina, and is fixed to the coil 3 with, for example, an epoxy adhesive. Further, the heat radiating member 4 may have various shapes such as a flat shape or a block shape.

放熱部材4の材質は、熱伝導率が高い材質、例えば25℃での熱伝導率が10W/m・K以上のものを選択することが好ましい。このような熱伝導率を有する材質で放熱部材4を構成することにより、コイル3からの熱を効率良く放熱させることができる。より好ましい熱伝導率は20W/m・K以上、さらに好ましい熱伝導率は30W/m・K以上である。放熱部材4を構成する具体的な材料としては、絶縁性を有するセラミックス材料、例えばアルミナ(Al2O3)、窒化アルミニウム(AlN)、窒化ホウ素（BN）、窒化珪素(Si3N4)および炭化珪素（SiC）よりなる群から選択される少なくとも１種が挙げられる。また、コイル3の巻線には絶縁被覆を有することから、例えばアルミニウム、銅、これらの合金、あるいはオーステナイト系ステンレス（SUS304など）などの金属材料で放熱部材4を構成してもよい。このような金属材料で構成する場合、コイル3と接触する放熱部材4の表面に絶縁被覆を形成しておくことで、コイル3と放熱部材4との間の絶縁を確実に維持することができる。絶縁被覆は、放熱部材4への熱伝導が阻害されないように、上記セラミックス材料で構成することが好ましい。 The material of the heat radiating member 4 is preferably selected from materials having high thermal conductivity, for example, those having a thermal conductivity of 10 W / m · K or more at 25 ° C. By configuring the heat radiating member 4 with a material having such thermal conductivity, the heat from the coil 3 can be efficiently radiated. A more preferable thermal conductivity is 20 W / m · K or more, and a more preferable thermal conductivity is 30 W / m · K or more. Specific materials constituting the heat dissipation member 4 include insulating ceramic materials such as alumina (Al 2 O 3 ), aluminum nitride (AlN), boron nitride (BN), silicon nitride (Si 3 N 4 ), and the like. Examples include at least one selected from the group consisting of silicon carbide (SiC). Further, since the winding of the coil 3 has an insulating coating, the heat radiating member 4 may be made of a metal material such as aluminum, copper, an alloy thereof, or austenitic stainless steel (SUS304 or the like). When configured with such a metal material, insulation between the coil 3 and the heat radiating member 4 can be reliably maintained by forming an insulating coating on the surface of the heat radiating member 4 in contact with the coil 3. . The insulating coating is preferably composed of the above ceramic material so that the heat conduction to the heat radiating member 4 is not hindered.

搭載部Lは、ケースの底板や、ヒートシンクの台座、冷却器などであり、上面（リアクトル1が搭載される面）が平面になっている。また、搭載部を構成する材料としては、熱伝導率の高い金属材料（アルミニウムやステンレスなど）や上記セラミックス材料などで構成することができる。金属材料で構成する場合、コイル3と接触する搭載部Lの表面に絶縁被覆を形成しておくことで、コイル3と搭載部Lとの間の絶縁を確実に維持することができる。絶縁被覆は、搭載部Lへの熱伝導が阻害されないように、上記セラミックス材料で構成することが好ましい。   The mounting portion L is a bottom plate of the case, a pedestal of a heat sink, a cooler, and the like, and an upper surface (a surface on which the reactor 1 is mounted) is flat. Moreover, as a material which comprises a mounting part, it can comprise with metal materials (aluminum, stainless steel, etc.) with high heat conductivity, the said ceramic material, etc. In the case of using a metal material, the insulation between the coil 3 and the mounting portion L can be reliably maintained by forming an insulating coating on the surface of the mounting portion L in contact with the coil 3. The insulating coating is preferably composed of the above ceramic material so that the heat conduction to the mounting portion L is not hindered.

リアクトル1は、例えば樹脂モールドすることにより搭載部Lに固定される。その他、接着剤により固定したり、コア2をねじ止めすることにより固定してもよい。   The reactor 1 is fixed to the mounting portion L by, for example, resin molding. In addition, it may be fixed by an adhesive or by fixing the core 2 with screws.

以上説明した実施例１に係るリアクトル1によれば、搭載部と反対側に位置するコイル3の取り付け面3oからコイル3の熱を放熱部材4に伝導させることができるので、リアクトルの放熱性能を高めることができる。   According to the reactor 1 which concerns on Example 1 demonstrated above, since the heat | fever of the coil 3 can be conducted to the thermal radiation member 4 from the attachment surface 3o of the coil 3 located in the opposite side to a mounting part, the thermal radiation performance of a reactor is demonstrated. Can be increased.

＜実施例２＞
図４は、本発明の実施例２に係るリアクトルを説明するための図であり、上記実施例１と同一部材には同一符号を付し、重複する説明を省略する。 <Example 2>
FIG. 4 is a diagram for explaining a reactor according to a second embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

リアクトル11は、放熱部材4が熱伝導部材5lを有する点で図１〜３に示すリアクトル1と異なる。   Reactor 11 differs from reactor 1 shown in FIGS. 1 to 3 in that heat radiating member 4 has heat conducting member 5l.

熱伝導部材5lは、放熱部材4の四隅に配置される脚状の部材であり、一端側が放熱部材4に固定され、他端側が搭載部Lに固定される。熱伝導部材5lの一端側、他端側を固定する手段としては、例えば溶接や、接着剤、ねじ止めなどが挙げられる。この熱伝導部材5lは、熱伝導率が高い材料、例えば放熱部材4と同じ材料で構成することができ、熱伝導部材5lを放熱部材4と一体に成形してもよい。   The heat conducting member 5l is a leg-shaped member disposed at the four corners of the heat radiating member 4, and one end side is fixed to the heat radiating member 4 and the other end side is fixed to the mounting portion L. Examples of means for fixing one end side and the other end side of the heat conducting member 5l include welding, an adhesive, and screwing. The heat conducting member 5l can be made of a material having high thermal conductivity, for example, the same material as the heat radiating member 4, and the heat conducting member 5l may be formed integrally with the heat radiating member 4.

熱伝導部材5lは、搭載部Lに固定されるので、コイル3の取り付け面3oが放熱部材4により押し付けられる。そのため、放熱部材4をコイル3の取り付け面3oに接着剤により固定しなくとも、放熱部材4がコイル3に固定され、また、樹脂モールドや接着剤などを用いなくても、リアクトル11を搭載部Lに固定することができる。   Since the heat conducting member 5l is fixed to the mounting portion L, the attachment surface 3o of the coil 3 is pressed by the heat radiating member 4. Therefore, even if the heat radiating member 4 is not fixed to the mounting surface 3o of the coil 3 with an adhesive, the heat radiating member 4 is fixed to the coil 3, and the reactor 11 can be mounted without using a resin mold or an adhesive. Can be fixed to L.

以上説明した実施例２に係るリアクトル11によれば、放熱部材4が吸収した熱を、熱伝導部材5lを介して搭載部Lに伝導させることができるので、放熱部材4の冷却性能を高め、リアクトルの放熱性能をより高めることができる。また、熱伝導部材5lを搭載部Lに固定することで、コイル3の取り付け面3oが放熱部材4により押し付けられ、外部振動の影響によりリアクトル11が搭載部Lから外れたりずれたりすることを防止できる。   According to the reactor 11 according to the second embodiment described above, the heat absorbed by the heat radiating member 4 can be conducted to the mounting portion L via the heat conducting member 5l, so that the cooling performance of the heat radiating member 4 is improved. The heat dissipation performance of the reactor can be further increased. In addition, fixing the heat conducting member 5l to the mounting portion L prevents the attachment surface 3o of the coil 3 from being pressed by the heat radiating member 4 and prevents the reactor 11 from being detached from the mounting portion L due to the influence of external vibration. it can.

＜実施例３＞
図５は、本発明の実施例３に係るリアクトルを説明するための図であり、上記実施例１と同一部材には同一符号を付し、重複する説明を省略する。 <Example 3>
FIG. 5 is a diagram for explaining a reactor according to a third embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

リアクトル12は、熱伝導部材の形状と配置箇所が図４に示すリアクトル11と異なる。   Reactor 12 is different from reactor 11 shown in FIG.

熱伝導部材5pは、対向し合うコイル3間の間隙に挿通するように配置される板状の部材であり、搭載部Lに立設されている。この熱伝導部材5pは、例えば溶接や、接着剤などの手段により搭載部Lに固定されている。また、この熱伝導部材5pの上側（搭載部Lとの反対側）には、放熱部材4が固定される。放熱部材4を固定する手段としては、例えば接着剤やねじ止めなどが挙げられる。この熱伝導部材5pは、熱伝導率が高い材料、例えば放熱部材4と同じ材料で構成することができ、熱伝導部材5pを放熱部材4と一体に成形してもよい。   The heat conducting member 5p is a plate-like member disposed so as to be inserted into the gap between the coils 3 facing each other, and is erected on the mounting portion L. The heat conducting member 5p is fixed to the mounting portion L by means such as welding or an adhesive. In addition, the heat radiating member 4 is fixed to the upper side of the heat conducting member 5p (the side opposite to the mounting portion L). Examples of means for fixing the heat radiating member 4 include an adhesive and screwing. The heat conducting member 5p can be made of a material having high thermal conductivity, for example, the same material as the heat radiating member 4, and the heat conducting member 5p may be formed integrally with the heat radiating member 4.

以上説明した実施例３に係るリアクトル12によれば、熱がこもり易く放熱効率が低いコイル3同士が対向し合う箇所の熱を、熱伝導部材5pを介して搭載部Lに伝導させることができるので、リアクトルの放熱性能をより高めることができる。   According to the reactor 12 according to the third embodiment described above, the heat at a location where the coils 3 facing each other and the heat radiation efficiency is low and the heat radiation efficiency is low can be conducted to the mounting portion L via the heat conducting member 5p. Therefore, the heat dissipation performance of the reactor can be further increased.

＜変形例３−１＞
次に、上記実施例３に係るリアクトルの変形例を図６を参照して説明する。 <Modification 3-1>
Next, a modification of the reactor according to the third embodiment will be described with reference to FIG.

リアクトル13は、熱伝導部材の形状が図５に示すリアクトル12と異なる。   Reactor 13 is different from reactor 12 shown in FIG. 5 in the shape of the heat conducting member.

熱伝導部材5sは、対向し合うコイル3間の間隙に挿通するように配置されるねじ状の部材である。また、放熱部材4にはこの熱伝導部材5sが挿通される孔が、搭載部Lにはこの熱伝導部材5sと螺合するねじ穴が、それぞれ形成されている。そして、この熱伝導部材5sは、放熱部材4の上側から挿通され、コイル3間の間隙を通って、搭載部Lのねじ穴に螺合されることで固定される。   The heat conducting member 5s is a screw-like member disposed so as to be inserted into the gap between the coils 3 facing each other. Further, the heat radiating member 4 is formed with a hole through which the heat conducting member 5s is inserted, and the mounting portion L is formed with a screw hole to be screwed with the heat conducting member 5s. The heat conducting member 5s is inserted from above the heat radiating member 4 and is fixed by being screwed into the screw hole of the mounting portion L through the gap between the coils 3.

この構成によれば、放熱部材4をコイル3に簡単に固定でき、また、熱伝導部材5sを搭載部Lに簡単に固定することができるので、リアクトルの組立作業性を向上させることができる。   According to this configuration, the heat dissipating member 4 can be easily fixed to the coil 3, and the heat conducting member 5s can be easily fixed to the mounting portion L, so that the assembly workability of the reactor can be improved.

＜変形例３−２＞
さらに、図７に示すように、熱伝導部材5sをコイル3の外側側面にも配置されるように設けてもよい。 <Modification 3-2>
Further, as shown in FIG. 7, the heat conducting member 5 s may be provided so as to be disposed also on the outer side surface of the coil 3.

このようなリアクトル14では、放熱部材4をコイル3に安定して固定できると共に、搭載部Lに対するリアクトル14の固定状態も安定する。また、コイル3の外側側面からコイル3の熱を、コイル3の外側側面に位置する熱伝導部材5sを介して搭載部Lに伝導させることができるので、リアクトルの放熱性能をより高めることができる。   In such a reactor 14, the heat radiating member 4 can be stably fixed to the coil 3, and the fixed state of the reactor 14 with respect to the mounting portion L is also stable. Further, since the heat of the coil 3 can be conducted from the outer side surface of the coil 3 to the mounting portion L via the heat conducting member 5s located on the outer side surface of the coil 3, the heat dissipation performance of the reactor can be further enhanced. .

＜実施例４＞
図８は、本発明の実施例４に係るリアクトルを説明するための図であり、上記実施例１と同一部材には同一符号を付し、重複する説明を省略する。 <Example 4>
FIG. 8 is a diagram for explaining a reactor according to a fourth embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

リアクトル15,16は、放熱部材が放熱フィンを有する点で図１〜３に示すリアクトル11と異なる。   Reactors 15 and 16 differ from reactor 11 shown in FIGS. 1 to 3 in that the heat dissipating member has heat dissipating fins.

リアクトル15の放熱部材4は、表面に棒状の放熱フィン4fが立設されている（図８（A）を参照）。また、リアクトル16の放熱部材4は、表面に板状の放熱フィン4fが立設されている（図８（B）を参照）。いずれも放熱部材4の表面積が増加し、放熱部材の冷却性能を高めることができるので、リアクトルの放熱性能をより高めることができる。また、放熱フィン4fは、熱伝導率が高い材料、例えば放熱部材4と同じ材料で構成することができ、放熱フィン4fを放熱部材4と一体に成形してもよい。   The heat radiating member 4 of the reactor 15 has rod-shaped heat radiating fins 4f on its surface (see FIG. 8A). Further, the heat radiating member 4 of the reactor 16 has plate-like heat radiating fins 4f erected on the surface (see FIG. 8B). In either case, since the surface area of the heat radiating member 4 is increased and the cooling performance of the heat radiating member can be enhanced, the heat radiating performance of the reactor can be further enhanced. The heat radiation fin 4f can be made of a material having high thermal conductivity, for example, the same material as the heat radiation member 4, and the heat radiation fin 4f may be formed integrally with the heat radiation member 4.

＜実施例５＞
図９は、本発明の実施例５に係るリアクトルを説明するための図であり、上記実施例１と同一部材には同一符号を付し、重複する説明を省略する。 <Example 5>
FIG. 9 is a diagram for explaining a reactor according to a fifth embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

リアクトル17は、コアの形状が図１〜３に示すリアクトル11と異なる。   Reactor 17 is different from reactor 11 shown in FIGS.

リアクトル17のコア2は、U字状部分において、搭載部Lと反対側の面も突出しており、この面が放熱部材4と直接接触している。そのため、搭載部Lと反対側に位置するコア2の一部分からも放熱部材4に熱を伝導させることができるので、リアクトルの放熱性能をより高めることができる。   The core 2 of the reactor 17 has a U-shaped portion that also projects from the surface opposite to the mounting portion L, and this surface is in direct contact with the heat dissipation member 4. Therefore, heat can be conducted from the part of the core 2 located on the side opposite to the mounting portion L to the heat radiating member 4, so that the heat dissipation performance of the reactor can be further enhanced.

なお、本発明は、上述した実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で適宜変更することが可能である。例えば、上述した各実施例の構成を複数組み合わせて用いてもよい。   Note that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the gist of the present invention. For example, you may use combining the structure of each Example mentioned above in multiple numbers.

本発明のリアクトルは、放熱性能が高く、例えばハイブリッド自動車や電気自動車などのコンバータに使用されるリアクトルに好適に利用できる。   The reactor of the present invention has high heat dissipation performance and can be suitably used for a reactor used in a converter such as a hybrid vehicle or an electric vehicle.

本発明の実施例１に係るリアクトルの概略斜視図である。It is a schematic perspective view of the reactor which concerns on Example 1 of this invention. 本発明の実施例１に係るリアクトルの概略側面図である。It is a schematic side view of the reactor which concerns on Example 1 of this invention. 本発明の実施例１に係るリアクトルの概略分解斜視図である。It is a general | schematic disassembled perspective view of the reactor which concerns on Example 1 of this invention. 本発明の実施例２に係るリアクトルの概略分解斜視図である。It is a general | schematic disassembled perspective view of the reactor which concerns on Example 2 of this invention. 本発明の実施例３に係るリアクトルの概略分解斜視図である。It is a general | schematic disassembled perspective view of the reactor which concerns on Example 3 of this invention. 熱伝導部材の変形例を示す概略分解斜視図である。It is a schematic exploded perspective view which shows the modification of a heat conductive member. 熱伝導部材の別の変形例を示す概略斜視図である。It is a schematic perspective view which shows another modification of a heat conductive member. 本発明の実施例４に係るリアクトルの概略斜視図であり、（A）は放熱部材の表面に棒状の放熱フィンを設けた例を示し、（B）は放熱部材の表面に板状の放熱フィンを設けた例を示す。It is a schematic perspective view of the reactor which concerns on Example 4 of this invention, (A) shows the example which provided the rod-shaped heat radiation fin in the surface of the heat radiating member, (B) is a plate-shaped heat radiating fin in the surface of the heat radiating member. An example in which is provided. 本発明の実施例５に係るリアクトルの概略側面図である。It is a schematic side view of the reactor which concerns on Example 5 of this invention.

符号の説明Explanation of symbols

1,11,12,13,14,15,16,17 リアクトル L 搭載部
2 コア 2i 設置面
3 コイル 3i 設置面 3o 取り付け面
4 放熱部材 4f 放熱フィン
5l,5p,5s 熱伝導部材 1,11,12,13,14,15,16,17 Reactor L mounted part
2 core 2i installation surface
3 Coil 3i Installation surface 3o Installation surface
4 Heat dissipation member 4f Heat dissipation fin
5l, 5p, 5s heat conduction member

Claims (6)

対向し合うコイル巻回部を有し、閉磁路を形成するコアと、前記コイル巻回部に巻線を巻回してなるコイルとを備えるリアクトルであって、
前記コイルは、リアクトルが搭載される搭載部側に位置する設置面と、この設置面の反対側に位置する取り付け面とを有しており、
前記取り付け面に、放熱部材が配設されていることを特徴とするリアクトル。 A reactor having a coil winding portion facing each other, a core forming a closed magnetic path, and a coil formed by winding a winding around the coil winding portion,
The coil has an installation surface located on the mounting portion side on which the reactor is mounted, and an attachment surface located on the opposite side of the installation surface,
A reactor in which a heat radiating member is disposed on the mounting surface. 前記放熱部材が前記搭載部側に延びる熱伝導部材を有し、
この熱伝導部材が前記搭載部に固定されることを特徴とする請求項１に記載のリアクトル。 The heat dissipating member has a heat conducting member extending toward the mounting portion;
The reactor according to claim 1, wherein the heat conducting member is fixed to the mounting portion. 前記熱伝導部材が前記コイル巻回部に巻回された対向し合うコイル間の間隙に挿通するように配置されていることを特徴とする請求項２に記載のリアクトル。   The reactor according to claim 2, wherein the heat conducting member is disposed so as to be inserted into a gap between opposing coils wound around the coil winding portion. 前記放熱部材が表面に放熱フィンを有することを特徴とする請求項１〜３のいずれか一項に記載のリアクトル。   The reactor according to claim 1, wherein the heat radiating member has a heat radiating fin on a surface thereof. 前記コアのコイル巻回部以外の箇所において、前記搭載部側のコアの設置面が前記コイルの設置面と面一になっていることを特徴とする請求項１〜４のいずれか一項に記載のリアクトル。   5. The mounting surface of the core on the mounting portion side is flush with the mounting surface of the coil at a place other than the coil winding portion of the core. The described reactor. 前記コアのコイル巻回部以外の箇所において、前記搭載部側と反対側の面が前記放熱部材と接触していることを特徴とする請求項１〜５のいずれか一項に記載のリアクトル。   The reactor according to any one of claims 1 to 5, wherein a surface of the core other than the coil winding portion is in contact with the heat radiating member at a surface opposite to the mounting portion.
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JP2018160542A (en) * 2017-03-22 2018-10-11 Tdk株式会社 Coil device
JP7550527B2 (en) 2020-04-08 2024-09-13 日本特殊陶業株式会社 Reactor
EP3929950A1 (en) * 2020-06-23 2021-12-29 Hamilton Sundstrand Corporation Thermal management of inductor on a cold plate
US11557419B2 (en) 2020-06-23 2023-01-17 Hamilton Sundstrand Corporation Thermal management of inductor on a cold plate
EP4145474A1 (en) * 2021-09-07 2023-03-08 Abb Schweiz Ag Cooled electrical assembly comprising choke coil
CN117133531A (en) * 2023-04-14 2023-11-28 荣耀终端有限公司 Charging coil and electronic device

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