JP2011014669A - Cooling device for magnetic part - Google Patents

Cooling device for magnetic part Download PDF

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JP2011014669A
JP2011014669A JP2009156665A JP2009156665A JP2011014669A JP 2011014669 A JP2011014669 A JP 2011014669A JP 2009156665 A JP2009156665 A JP 2009156665A JP 2009156665 A JP2009156665 A JP 2009156665A JP 2011014669 A JP2011014669 A JP 2011014669A
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core
heat sink
resin coating
winding
coating portion
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JP5173951B2 (en
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yoshihiko Higashitani
義彦 東谷
Takeshi Kato
武士 加藤
Masao Nagano
正雄 永野
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To prevent temperature rises of a coil and a core, in a cooling device for a magnetic part such that the magnetic part having the core, the coil having a winding wire portion to be wound around the core, and a resin coating portion in which the winding wire portion is embedded is fitted to a heat sink.SOLUTION: The magnetic part is fitted to the heat sink 11, which has a flat fitting surface 11a formed orthogonally to axis lines of winding wiring portions 13a and 14a, by bringing the resin coating portion 17 and core 12 into contact with the fitting surface 11a, and at least a portion of a metallic radiator plate 28 is embedded in the resin coating portion 17.

Description

本発明は、コアと、該コアを巻回する巻線部を有するコイルと、前記巻線部を埋封せしめる樹脂被覆部とを有する磁気部品が、ヒートシンクに取付けられる磁気部品の冷却装置に関する。   The present invention relates to a cooling device for a magnetic component in which a magnetic component having a core, a coil having a winding portion around which the core is wound, and a resin coating portion for embedding the winding portion is attached to a heat sink.

コイルが巻装された状態のコアの両端部が、ヒートシンクとして機能する台座上に取付けられる押圧部材および前記台座間に挟まれた状態で、台座、コア、コイルおよび固定部材が樹脂によって一体的にモールドされるようにしたリアクトル装置が、特許文献１で知られている。   In a state where both ends of the core in a state where the coil is wound are sandwiched between the pressing member attached on the base functioning as a heat sink and the base, the base, the core, the coil, and the fixing member are integrally made of resin. A reactor device designed to be molded is known from Patent Document 1.

特開２００４−９５５７０号公報JP 2004-95570 A

ところが、上記特許文献１で開示されたものでは、コアが、該コアに巻装されたコイルの巻線部の軸線を台座とほぼ平行として台座に取付けられているので、コイルの一部とヒートシンクとの間の距離が大きくなり、しかもコイルとヒートシンクとの間に熱伝導率が比較的低い樹脂層が存在するので、コイルのうち台座から遠い部分とヒートシンクとの間の熱伝達が良好であるとは言い難い。このためコイルの一部に発熱特異部が生じることになり、コイルの被覆の耐熱温度を高く設定せざるを得ない。またコイル全体およびヒートシンク間の熱伝達が良好ではないので、コイルの熱の大部分が、コイルからコアを介してヒートシンクに伝達されることになり、その結果、コアの温度上昇を招いている。このコアの温度上昇は、耐熱温度の低い材料たとえばフェライトをコアの材質として選択した場合には、特に問題となる。   However, in the one disclosed in Patent Document 1, the core is attached to the pedestal so that the axis of the winding portion of the coil wound around the core is substantially parallel to the pedestal. Since there is a resin layer with a relatively low thermal conductivity between the coil and the heat sink, heat transfer between the part of the coil far from the pedestal and the heat sink is good. It's hard to say. For this reason, a heat generation specific part will arise in a part of coil, and the heat-resistant temperature of the coating of a coil has to be set high. In addition, since the heat transfer between the entire coil and the heat sink is not good, most of the heat of the coil is transferred from the coil to the heat sink via the core, resulting in an increase in the temperature of the core. This temperature rise of the core becomes a problem particularly when a material having a low heat resistance temperature, for example, ferrite is selected as the material of the core.

本発明は、かかる事情に鑑みてなされたものであり、コイルおよびコアの温度上昇を抑制し得るようにした磁気部品の冷却装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cooling device for a magnetic component capable of suppressing a temperature rise of a coil and a core.

上記目的を達成するために、本発明は、コアと、該コアを巻回する巻線部を有するコイルと、前記巻線部の少なくとも一部を埋封せしめる樹脂被覆部とを有する磁気部品が、ヒートシンクに取付けられる磁気部品の冷却装置において、前記巻線部の軸線と直交する平坦な取付け面が形成される前記ヒートシンクに、前記樹脂被覆部および前記コアを前記取付け面に当接させて前記磁気部品が取付けられ、前記樹脂被覆部に、金属製の放熱板の少なくとも一部が埋封されることを第１の特徴とする。   In order to achieve the above object, the present invention provides a magnetic component having a core, a coil having a winding portion around which the core is wound, and a resin coating portion in which at least a part of the winding portion is embedded. In the cooling device for a magnetic component attached to the heat sink, the resin coating portion and the core are brought into contact with the attachment surface to the heat sink in which a flat attachment surface orthogonal to the axis of the winding portion is formed. A first feature is that a magnetic component is attached, and at least a part of a metal heat sink is embedded in the resin coating portion.

また本発明は、第１の特徴の構成に加えて、前記放熱板が、前記取付け面に直接接触するようにして前記樹脂被覆部に埋封されることを第２の特徴とする。   Moreover, in addition to the structure of the 1st characteristic, this invention makes it the 2nd characteristic that the said heat sink is embedded in the said resin coating part so that it may contact the said attachment surface directly.

本発明は、第１または第２の特徴の構成に加えて、前記放熱板に、前記取付け面に当接しつつ該取付け面に取付けられる取付け板部が、前記樹脂被覆部から突出するようにして一体に設けられることを第３の特徴とする。   According to the present invention, in addition to the configuration of the first or second feature, an attachment plate portion that is attached to the attachment surface while abutting the attachment surface is protruded from the resin coating portion. A third feature is that they are provided integrally.

さらに本発明は、第１の特徴の構成に加えて、前記放熱板が、前記巻線部の軸線方向で該巻線部を両側から挟むように形成されることを第４の特徴とする。   Furthermore, the present invention is characterized in that, in addition to the configuration of the first feature, the heat radiating plate is formed so as to sandwich the winding portion from both sides in the axial direction of the winding portion.

本発明の第１の特徴によれば、コイルの巻線部の軸線と直交するようにしてヒートシンクに形成される平坦な取付け面に、磁気部品の樹脂被覆部およびコアが当接されるので、コイルの巻線部の軸線がヒートシンクとほぼ平行になっている場合と比べて、コイル全体をヒートシンクに近づけることができる。しかもコイルのうち少なくとも巻線部を封入せしめる樹脂被覆部に、金属製の放熱板の少なくとも一部が埋封されるので、コイルで生じた熱が放熱板を介してヒートシンク側に伝達され易くなり、コイル全体の熱を平均して放熱板から放熱するようにしてコイルの一部に発熱特異部が生じることがないようにして、コイルの温度上昇を抑制し、さらにコアもヒートシンクに当接しているので、コイルからコアに伝わった熱を効率よくヒートシンクに伝達するようにしてコアの温度上昇を抑制することができる。   According to the first feature of the present invention, the resin coating portion and the core of the magnetic component are brought into contact with the flat mounting surface formed on the heat sink so as to be orthogonal to the axis of the coil winding portion. Compared with the case where the axis of the coil winding portion is substantially parallel to the heat sink, the entire coil can be brought closer to the heat sink. Moreover, since at least a part of the metal heat sink is embedded in the resin coating portion that encloses at least the winding portion of the coil, the heat generated in the coil is easily transferred to the heat sink via the heat sink. The heat of the entire coil is averaged to be dissipated from the heat radiating plate so that no part of the coil generates heat, and the temperature rise of the coil is suppressed, and the core is also in contact with the heat sink Therefore, the heat transmitted from the coil to the core can be efficiently transmitted to the heat sink, and the temperature rise of the core can be suppressed.

また本発明の第２の特徴によれば、放熱板がヒートシンクに直接接触することで、ヒートシンク側への放熱をより促進することができる。   Moreover, according to the 2nd characteristic of this invention, the thermal radiation to a heat sink side can be accelerated | stimulated more because a heat sink directly contacts a heat sink.

本発明の第３の特徴によれば、樹脂被覆部から突出するようにして放熱板に一体に設けられる取付け板部がヒートシンクの取付け面に当接しつつ該取付け面に取付けられるので、放熱板に、熱伝達機能と、樹脂被覆部すなわち磁気部品をヒートシンクに取付ける機能とを持たせることができる。   According to the third feature of the present invention, the mounting plate portion integrally provided on the heat sink so as to protrude from the resin coating portion is attached to the mounting surface while being in contact with the mounting surface of the heat sink. The heat transfer function and the function of attaching the resin coating portion, that is, the magnetic component to the heat sink can be provided.

さらに本発明の第４の特徴によれば、少なくとも巻線部の軸線方向で該巻線部を両側から挟むように放熱板が形成されるので、コイル全体からの最適な放熱を実現することができる。   Furthermore, according to the fourth feature of the present invention, since the heat radiating plate is formed so as to sandwich the winding part from both sides at least in the axial direction of the winding part, it is possible to realize optimum heat radiation from the entire coil. it can.

実施例１におけるトランスおよびヒートシンクの縦断面図である。2 is a longitudinal sectional view of a transformer and a heat sink in Embodiment 1. FIG. トランスおよびヒートシンクの斜視図である。It is a perspective view of a transformer and a heat sink. トランスおよびヒートシンクの分解斜視図である。It is a disassembled perspective view of a transformer and a heat sink. コイルおよび樹脂被覆部の斜視図である。It is a perspective view of a coil and a resin coating part. 実施例２の図１に対応した縦断面図である。FIG. 3 is a longitudinal sectional view corresponding to FIG. 図５の６−６線断面図である。FIG. 6 is a sectional view taken along line 6-6 of FIG. 図５の７−７線断面図である。FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 5.

以下、本発明の実施の形態について図１〜図７を参照しながら説明する。   Embodiments of the present invention will be described below with reference to FIGS.

本発明の実施例１について図１〜図４を参照しながら説明するが、先ず図１〜図３において、磁気部品である２相のトランスが、該トランスで生じる熱を冷却するためにヒートシンク１１に取付けられる。   A first embodiment of the present invention will be described with reference to FIGS. 1 to 4. First, in FIGS. 1 to 3, a two-phase transformer, which is a magnetic component, has a heat sink 11 for cooling heat generated in the transformer. Mounted on.

前記トランスは、第１および第２コア半体２５，２６が連接されて成るコア１２と、該コア１２を巻回する巻線部１３ａ，１４ａをそれぞれ有する一対のコイル１３，１４と、両コイル１３，１４の巻線部１３ａ，１４ａおよび前記コア１２間に介装される第１および第２ボビン１５，１６と、前記両コイル１３，１４の巻線部１３ａ，１４ａを共通に埋封せしめる樹脂被覆部１７とを有し、コア１２を覆うカバー部材１８で前記ヒートシンク１１に取付けられる。   The transformer includes a core 12 formed by connecting first and second core halves 25 and 26, a pair of coils 13 and 14 each having winding portions 13a and 14a around which the core 12 is wound, and both coils. The first and second bobbins 15 and 16 interposed between the winding portions 13a and 14a of the coils 13 and 14 and the core 12 and the winding portions 13a and 14a of the coils 13 and 14 are embedded in common. The heat sink 11 is attached by a cover member 18 having a resin coating portion 17 and covering the core 12.

前記両コイル１３，１４は、それらのコイル１３，１４の巻線部１３ａ，１４ａを同軸上に配置して上下に配列されて成り、一方の巻線部１３ａの両端に連なる第１および第２端子１９，２０と、他方の巻線部１４ａの両端に連なる第３および第４端子２１，２２とが、第２および第３端子２０，２１を上下に重ねつつ前記両巻線部１３ａ，１４ａの同一側方に突出される。   The coils 13 and 14 are formed by arranging the winding portions 13a and 14a of the coils 13 and 14 on the same axis and arranged vertically, and the first and second coils connected to both ends of one winding portion 13a. The terminals 19 and 20 and the third and fourth terminals 21 and 22 connected to both ends of the other winding part 14a are arranged so that the second and third terminals 20 and 21 are stacked one above the other. Projecting to the same side.

図４を併せて参照して、前記樹脂被覆部１７は、前記両コイル１３，１４の両側で上下に平行に延びる一対の壁部分１７ａ，１７ｂと、両壁部分１７ａ，１７ｂ間を結ぶ架橋部分１７ｃとを有して、前記両巻線部１３ａ，１４ａを埋封するように形成されるものであり、第１〜第４端子１９〜２２は、一方の壁部分１７ａから側方に突出され、前記架橋部分１７ｃには、前記両巻線部１３ａ，１４ａと同軸の挿通孔２３が形成される。   Referring also to FIG. 4, the resin coating portion 17 includes a pair of wall portions 17 a and 17 b extending in parallel vertically on both sides of the coils 13 and 14 and a bridging portion connecting the wall portions 17 a and 17 b. 17c, and is formed so as to embed both winding portions 13a and 14a, and the first to fourth terminals 19 to 22 protrude laterally from one wall portion 17a. The bridging portion 17c is formed with an insertion hole 23 coaxial with the winding portions 13a and 14a.

第１ボビン１５は、前記挿通孔２３内に挿通される円筒部１５ａと、前記樹脂被覆部１７における架橋部分１７ｃの上端に当接されるようにして前記円筒部１５ａの一端に連なる鍔部１５ｂとを一体に有するように形成される。また第２ボビン１６は、前記挿通孔２３に対応した円形の開口部２４を中央部に有して平板状に形成されており、前記樹脂被覆部１７における架橋部分１７ｃの下端に当接され、第２ボビン１６における開口部２４の周縁には第１ボビン１５における円筒部１５ａの他端が当接される。しかも架橋部分１７ｃの上端および第１ボビン１５の鍔部１５ｂとは、相互の位置決めを確実にするように形成されており、前記架橋部分１７ｃの下端および第２ボビン１６も、相互の位置決めを確実にするように形成される。   The first bobbin 15 includes a cylindrical portion 15a inserted into the insertion hole 23, and a flange portion 15b connected to one end of the cylindrical portion 15a so as to be in contact with the upper end of the bridging portion 17c of the resin coating portion 17. Are integrally formed. The second bobbin 16 is formed in a flat plate shape having a circular opening 24 corresponding to the insertion hole 23 at the center, and is in contact with the lower end of the bridging portion 17c in the resin coating portion 17, The other end of the cylindrical portion 15 a of the first bobbin 15 is brought into contact with the peripheral edge of the opening 24 in the second bobbin 16. Moreover, the upper end of the bridging portion 17c and the flange portion 15b of the first bobbin 15 are formed so as to ensure mutual positioning, and the lower end of the bridging portion 17c and the second bobbin 16 also ensure mutual positioning. To be formed.

前記コア１２を相互に構成する第１および第２コア半体２５，２６のうち第１コア半体２５は、前記樹脂被覆部１７の両壁部分１７ａ，１７ｂ間で第１ボビン１５の鍔部１５ｂに当接する第１平板部２５ａと、第１ボビン１５の円筒部１５ａ内に嵌入するようにして第１平板部２５ａから直角に突出する第１突部２５ｂと、第１平板部２５ａの両端に直角に連なるとともに前記樹脂被覆部１７における架橋部分１７ｃの上端部両側に係合する一対の第１係合突部２５ｃ，２５ｃとを一体に有する。また第２コア半体２６は、前記樹脂被覆部１７の両壁部分１７ａ，１７ｂ間で第２ボビン１６に当接する第２平板部２６ａと、第２ボビン１６の開口部２４から第１ボビン１５の円筒部１５ａ内に嵌入するようにして第２平板部２６ａから直角に突出する第２突部２６ｂと、第２平板部２６ａの両端に直角に連なるとともに前記樹脂被覆部１７における架橋部分１７ｃの下端部両側に係合する一対の第２係合突部２６ｃ，２６ｃとを一体に有する。而して第１コア半体２５の第１突部２５ｂおよび第２コア半体２６の第２突部２６ｂは、第１ボビン１５における円筒部１５ａ内で相互に当接する。   Of the first and second core halves 25 and 26 constituting the core 12, the first core half 25 is a flange portion of the first bobbin 15 between both wall portions 17 a and 17 b of the resin coating portion 17. A first flat plate portion 25a that comes into contact with 15b, a first protrusion 25b that protrudes perpendicularly from the first flat plate portion 25a so as to fit into the cylindrical portion 15a of the first bobbin 15, and both ends of the first flat plate portion 25a. And a pair of first engaging protrusions 25c, 25c that are engaged with both sides of the upper end portion of the bridging portion 17c of the resin coating portion 17 integrally. The second core half body 26 includes a second flat plate portion 26 a that abuts against the second bobbin 16 between both wall portions 17 a and 17 b of the resin coating portion 17, and the first bobbin 15 from the opening 24 of the second bobbin 16. A second protrusion 26b protruding perpendicularly from the second flat plate portion 26a so as to fit in the cylindrical portion 15a, and a bridge portion 17c of the resin coating portion 17 connected to both ends of the second flat plate portion 26a at a right angle. A pair of second engaging protrusions 26c, 26c that engage with both sides of the lower end portion are integrally provided. Thus, the first protrusion 25b of the first core half 25 and the second protrusion 26b of the second core half 26 abut each other in the cylindrical portion 15a of the first bobbin 15.

前記カバー部材１８は、ヒートシンク１１側に向けて開口した略Ｕ字状に形成されるカバー主部１８ａと、該カバー主部１８ａの開口端に直角に連なって側方に張り出す一対の取付け鍔部１８ｂ，１８ｂとを一体に有するように形成される。而して第１および第２ボビン１５，１６を介して樹脂被覆部１７に装着された状態にある第１および第２コア半体２５，２６は、樹脂被覆部１７の両壁部分１７ａ，１７ｂ間でカバー部材１８の前記カバー主部１８ａで覆われることになる。   The cover member 18 includes a cover main portion 18a formed in a substantially U shape that opens toward the heat sink 11 and a pair of mounting rods extending sideways at right angles to the opening end of the cover main portion 18a. It forms so that it may have part 18b, 18b integrally. Thus, the first and second core halves 25 and 26 that are attached to the resin coating portion 17 via the first and second bobbins 15 and 16 are connected to both wall portions 17 a and 17 b of the resin coating portion 17. In the meantime, the cover main portion 18a of the cover member 18 is covered.

一方、ヒートシンク１１は、平坦な取付け面１１ａを有しており、前記樹脂被覆部１７に第１および第２ボビン１５，１６を介して装着された状態にある第１および第２コア半体２５，２６を覆うカバー部材１８の両取付け鍔部１８ｂ…が、一対ずつのボルト２７，２７…によって前記取付け面１１ａに締結され、それにより、前記両コイル１３，１４が備える巻線部１３ａ，１４ａの軸線を前記取付け面１１ａと直交させるようにしたトランスが、樹脂被覆部１７およびコア１２を取付け面１１ａに当接させた状態でヒートシンク１１に取付けられることになる。   On the other hand, the heat sink 11 has a flat mounting surface 11a, and the first and second core halves 25 are attached to the resin coating portion 17 via the first and second bobbins 15 and 16. , 26 are attached to the attachment surface 11a by a pair of bolts 27, 27,..., So that the coil portions 13a, 14a included in the coils 13, 14 are fastened. The transformer in which the axis is orthogonal to the mounting surface 11a is attached to the heat sink 11 with the resin coating portion 17 and the core 12 in contact with the mounting surface 11a.

しかも前記樹脂被覆部１７の両壁部分１７ａ，１７ｂには、金属製である放熱板２８，２８の少なくとも一部がそれぞれ埋封される。この実施例では、前記両コイル１３，１４の巻線部１３ａ，１４ａおよびヒートシンク１１間に配置されるようにして一対の放熱板２８，２８の大部分が前記両壁部分１７ａ，１７ｂの下部に埋封されており、それらの放熱板２８…は、ヒートシンク１１の前記取付け面１１ａに直接接触するようにして前記樹脂被覆部１７の両壁部分１７ａ，１７ｂに埋封される。   In addition, at least a part of the heat dissipation plates 28 and 28 made of metal are embedded in the both wall portions 17a and 17b of the resin coating portion 17, respectively. In this embodiment, most of the pair of heat sinks 28 and 28 are arranged below the wall portions 17a and 17b so as to be disposed between the winding portions 13a and 14a of the coils 13 and 14 and the heat sink 11. The heat radiating plates 28 are embedded in both wall portions 17 a and 17 b of the resin coating portion 17 so as to be in direct contact with the mounting surface 11 a of the heat sink 11.

さらに放熱板２８には、前記樹脂被覆部１７の壁部分から突出する一対の取付け板部２８ａ，２８ａが一体に設けられており、それらの取付け板部２８ａ…は、ヒートシンク１１の取付け面１１ａに当接しつつ該取付け面１１ａにボルト２９…によってそれぞれ取付けられる。   Furthermore, the heat sink 28 is integrally provided with a pair of mounting plate portions 28 a and 28 a that protrude from the wall portion of the resin coating portion 17, and these mounting plate portions 28 a... Are attached to the mounting surface 11 a of the heat sink 11. The bolts 29 are attached to the mounting surface 11a while being in contact with each other.

次にこの実施例１の作用について説明すると、第１および第２コア半体２５，２６が連接されて成るコア１２と、該コア１２を巻回する巻線部１３ａ，１４ａをそれぞれ有する一対のコイル１３，１４と、両コイル１３，１４の巻線部１３ａ，１４ａおよび前記コア１２間に介装される第１および第２ボビン１５，１６と、前記両コイル１３，１４の巻線部１３ａ，１４ａを共通に埋封せしめる樹脂被覆部１７とを有するトランスが、巻線部１３ａ，１４ａの軸線と直交する平坦な取付け面１１ａが形成されるヒートシンク１１に、樹脂被覆部１７およびコア１２を取付け面１１ａに当接させるようにして取付けられるので、コイル１３，１４の巻線部１３ａ，１４ａの軸線がヒートシンク１１とほぼ平行になっている場合と比べて、コイル１３，１４全体をヒートシンク１１に近づけることができる。   Next, the operation of the first embodiment will be described. A pair of cores 12 having first and second core halves 25 and 26 connected to each other, and winding portions 13a and 14a around which the core 12 is wound. The coils 13, 14, the first and second bobbins 15, 16 interposed between the winding portions 13 a, 14 a of the coils 13, 14 and the core 12, and the winding portions 13 a of the coils 13, 14. , 14a and a transformer 12 having a resin coating 17 in common, the transformer 11 having the resin coating 17 and the core 12 are mounted on the heat sink 11 having a flat mounting surface 11a perpendicular to the axis of the windings 13a, 14a. Since it is attached so as to be in contact with the attachment surface 11a, the coil is compared with a case where the axes of the winding portions 13a, 14a of the coils 13, 14 are substantially parallel to the heat sink 11. 3,14 can be brought close to the entire heat sink 11.

しかも樹脂被覆部１７に、金属製の放熱板２８…の少なくとも一部が埋封されるので、コイル１３，１４で生じた熱が放熱板２８…を介してヒートシンク１１側に伝達され易くなり、コイル１３，１４全体の熱を平均して放熱板２８…から放熱するようにしてコイル１３，１４の一部に発熱特異部が生じることがないようにして、コイル１３，１４の温度上昇を抑制し、さらにコア１２もヒートシンク１１に当接しているので、コイル１３，１４からコア１２に伝わった熱を効率よくヒートシンク１１に伝達するようにしてコア１２の温度上昇を抑制することができる。   Moreover, since at least a part of the metal heat radiating plate 28 is embedded in the resin coating portion 17, heat generated in the coils 13 and 14 is easily transmitted to the heat sink 11 side via the heat radiating plate 28, The heat of the coils 13 and 14 is averaged and radiated from the heat radiating plate 28, so that no heat generation singular part is generated in a part of the coils 13 and 14, and the temperature rise of the coils 13 and 14 is suppressed. In addition, since the core 12 is also in contact with the heat sink 11, the heat transmitted from the coils 13 and 14 to the core 12 can be efficiently transmitted to the heat sink 11, and the temperature rise of the core 12 can be suppressed.

また放熱板２８…が、ヒートシンク１１の取付け面１１ａに直接接触するようにして樹脂被覆部１７に埋封されるので、ヒートシンク１１側への放熱をより促進することができる。   Further, since the heat radiating plates 28 are embedded in the resin coating portion 17 so as to be in direct contact with the mounting surface 11a of the heat sink 11, heat radiation toward the heat sink 11 can be further promoted.

さらに放熱板２８…には、ヒートシンク１１の取付け面１１ａに当接しつつ該取付け面１１ａに取付けられる取付け板部２８ａ、２８ａ…が、樹脂被覆部１７の壁部分１７ａ，１７ｂから突出するようにして一体に設けられるので、放熱板２８…に、熱伝達機能と、樹脂被覆部１７すなわち磁気部品をヒートシンク１１に取付ける機能とを持たせることができる。   Further, the heat radiating plates 28 are provided with mounting plate portions 28 a, 28 a, which are attached to the mounting surface 11 a in contact with the mounting surface 11 a of the heat sink 11 so as to protrude from the wall portions 17 a, 17 b of the resin coating portion 17. Since they are provided integrally, the heat radiating plates 28 can have a heat transfer function and a function of attaching the resin coating portion 17, that is, a magnetic component to the heat sink 11.

図５〜図７を参照しながら本発明の実施例２について説明するが、上述の実施例１に対応する部分には同一の参照符号を付して図示するのみとし、詳細な説明を省略する。   A second embodiment of the present invention will be described with reference to FIGS. 5 to 7, but the portions corresponding to the above-described first embodiment are denoted by the same reference numerals and are not illustrated in detail. .

樹脂被覆部１７における壁部分１７ａ，１７ｂには、両コイル１３，１４の巻線部１３ａ，１４ａを両側から挟む一対の金属製の放熱板３０，３１の少なくとも一部が埋封されており、それらの放熱板３０，３１に一体に設けられて前記壁部分１７ａ，１７ｂから突出する取付け板部３０ａ，３０ａ；３１ａ，３１ａが、ヒートシンク１１の取付け面１１ａに当接しつつ該取付け面１１ａにボルト２９，２９…で取付けられる。   At least a part of a pair of metal heat radiation plates 30 and 31 sandwiching the winding portions 13a and 14a of both the coils 13 and 14 from both sides is embedded in the wall portions 17a and 17b in the resin coating portion 17, Mounting plate portions 30a, 30a; 31a, 31a provided integrally with the heat radiation plates 30, 31 and projecting from the wall portions 17a, 17b are in contact with the mounting surface 11a of the heat sink 11 and bolts are attached to the mounting surface 11a. 29, 29...

しかも前記両放熱板３０，３１は、少なくとも前記巻線部１３ａ，１４ａの軸線方向で該巻線部１３ａ，１４ａを両側から挟むように形成されるものであり、一方の放熱板３０は、前記両コイル１３，１４の巻線部１３ａ，１４ａの一部を配置するとともにそれらの巻線部１３ａ，１４ａの両端に連なる第１〜第４端子１９〜２２を側方に突出させるための開口部３２を有し、前記両巻線部１３ａ，１４ａの一側を取り囲むように形成され、他方の放熱板３１は、前記両コイル１３，１４の巻線部１３ａ，１４ａの一部を配置する開口部３３を有し、前記両巻線部１３ａ，１４ａの他側を取り囲むように形成される。   Moreover, the heat radiating plates 30 and 31 are formed so as to sandwich the winding portions 13a and 14a from both sides in at least the axial direction of the winding portions 13a and 14a. An opening for arranging a part of the winding portions 13a, 14a of both the coils 13, 14 and projecting the first to fourth terminals 19-22 connected to both ends of the winding portions 13a, 14a to the side. 32 and is formed so as to surround one side of both the winding portions 13a and 14a, and the other radiator plate 31 is an opening for arranging a part of the winding portions 13a and 14a of the both coils 13 and 14. It has a portion 33 and is formed so as to surround the other side of the winding portions 13a, 14a.

この実施例２によれば、金属製の放熱板３０，３１が、少なくともコイル１３，１４における巻線部１３ａ，１４ａの軸線方向で該巻線部１３ａ，１４ａを両側から挟むように形成されており、特に両巻線部１３ａ，１４ａの一側および他側を取り囲むように放熱板３０，３１が形成されるので、コイル１３，１４全体からの最適な放熱を実現することができる。   According to the second embodiment, the metal heat sinks 30 and 31 are formed so as to sandwich the winding portions 13a and 14a from both sides in the axial direction of the winding portions 13a and 14a of the coils 13 and 14 at least. In particular, since the heat radiating plates 30 and 31 are formed so as to surround one side and the other side of the winding portions 13a and 14a, optimal heat radiation from the coils 13 and 14 as a whole can be realized.

以上、本発明の実施の形態について説明したが、本発明は上記実施の形態に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

たとば上記実施の形態では磁気部品として２相のトランスを取り上げて説明したが、本発明は２相のトランスに限定されるものではなく、コアと、該コアを巻回する巻線部を有するコイルと、前記巻線部を埋封せしめる樹脂被覆部とを有する磁気部品に関連して広く実施することができる。   For example, in the above-described embodiment, a two-phase transformer has been described as a magnetic component. However, the present invention is not limited to a two-phase transformer, and includes a core and a winding portion around which the core is wound. The present invention can be widely implemented in connection with a magnetic component having a coil and a resin coating portion for embedding the winding portion.

１１・・・ヒートシンク
１１ａ・・・取付け面
１２・・・コア
１３，１４・・・コイル
１３ａ，１４ａ・・・巻線部
１７・・・樹脂被覆部
２８，３０，３１・・・放熱板
２８ａ，３０ａ，３１ａ・・・取付け板部 DESCRIPTION OF SYMBOLS 11 ... Heat sink 11a ... Mounting surface 12 ... Core 13, 14 ... Coil 13a, 14a ... Winding part 17 ... Resin coating | cover part 28, 30, 31 ... Heat sink 28a , 30a, 31a ... Mounting plate

Claims (4)

コア（１２）と、該コア（１２）を巻回する巻線部（１３ａ，１４ａ）を有するコイル（１３，１４) と、前記巻線部（１３ａ，１４ａ）の少なくとも一部を埋封せしめる樹脂被覆部（１７）とを有する磁気部品が、ヒートシンク（１１）に取付けられる磁気部品の冷却装置において、前記巻線部（１３ａ，１４ａ）の軸線と直交する平坦な取付け面（１１ａ）が形成される前記ヒートシンク（１１）に、前記樹脂被覆部（１７）および前記コア（１２）を前記取付け面（１１ａ）に当接させて前記磁気部品が取付けられ、前記樹脂被覆部（１７）に、金属製の放熱板（２８，３０，３１）の少なくとも一部が埋封されることを特徴とする磁気部品の冷却装置。   A coil (13, 14) having a core (12) and winding portions (13a, 14a) for winding the core (12) and at least a part of the winding portions (13a, 14a) are embedded. In a magnetic component cooling apparatus in which a magnetic component having a resin coating portion (17) is attached to a heat sink (11), a flat attachment surface (11a) perpendicular to the axis of the winding portions (13a, 14a) is formed. The magnetic component is attached to the heat sink (11) by bringing the resin coating portion (17) and the core (12) into contact with the mounting surface (11a), and the resin coating portion (17) A cooling device for a magnetic part, wherein at least a part of a metal heat sink (28, 30, 31) is embedded. 前記放熱板（２８，３０，３１）が、前記取付け面（１１ａ）に直接接触するようにして前記樹脂被覆部（１７）に埋封されることを特徴とする請求項１記載の磁気部品の冷却装置。   2. The magnetic component according to claim 1, wherein the heat radiating plate is embedded in the resin coating portion so as to be in direct contact with the mounting surface. Cooling system. 前記放熱板（２８，３０，３１）に、前記取付け面（１１ａ）に当接しつつ該取付け面（１１ａ）に取付けられる取付け板部（２８ａ，３０ａ，３１ａ）が、前記樹脂被覆部（１７）から突出するようにして一体に設けられることを特徴とする請求項１または２記載の磁気部品の冷却装置。   Mounting plate portions (28a, 30a, 31a) attached to the mounting surface (11a) while abutting the mounting surface (11a) on the heat radiating plates (28, 30, 31) are formed on the resin coating portion (17). 3. The cooling device for a magnetic component according to claim 1, wherein the cooling device is integrally provided so as to project from the magnetic component. 前記放熱板（３０，３１）が、少なくとも前記巻線部（１３ａ，１４ａ）の軸線方向で該巻線部（１３ａ，１４ａ）を両側から挟むように形成されることを特徴とする請求項１記載の磁気部品の冷却装置。   The said heat sink (30, 31) is formed so that this winding part (13a, 14a) may be pinched | interposed from both sides at least in the axial direction of the said winding part (13a, 14a). The cooling device for the magnetic component described.
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