JP2015005651A - Coil and reactor - Google Patents

Coil and reactor Download PDF

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JP2015005651A
JP2015005651A JP2013130614A JP2013130614A JP2015005651A JP 2015005651 A JP2015005651 A JP 2015005651A JP 2013130614 A JP2013130614 A JP 2013130614A JP 2013130614 A JP2013130614 A JP 2013130614A JP 2015005651 A JP2015005651 A JP 2015005651A
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sheet
coil
adhesive
conductor
insulating particles
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JP2015005651A5 (en
JP6400277B2 (en
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有希 阿部
Yuki Abe
有希 阿部
山家　孝志
Takashi Yamaya
孝志 山家
佐藤　浩文
Hirofumi Sato
浩文 佐藤
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Tokin Corp
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NEC Tokin Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a coil exhibiting high heat dissipation even if embedded in a magnetic core, and to provide a reactor using the coil.SOLUTION: A coil 1 includes a sheet-like conductor 10, and an adhesive 12 blended with insulation particles 11 consisting of an inorganic substance. The sheet-like conductor 10 is wound around a winding axis while entraining the insulation particles 11 and an adhesive 12. Layers of the sheet-like conductor 10 are bonded by the adhesive 12, and an electrical insulation distance is maintained between the layers of the sheet-like conductor 10 by the insulation particles 11.

Description

本発明は、通電によるインダクタンスを活用するコイル及びリアクトルに関する。   The present invention relates to a coil and a reactor that utilize inductance due to energization.

金属シートと絶縁シートを重ねて巻き回したコイルは、主に変圧器等に用いられている。   A coil in which a metal sheet and an insulating sheet are overlapped and wound is mainly used for a transformer or the like.

図８は、特許文献１に記載された構成を備える従来技術のコイルを示す斜視図である。   FIG. 8 is a perspective view showing a prior art coil having the configuration described in Patent Document 1. In FIG.

図９は、特許文献１に記載された構成を備える従来技術のコイルを示す断面図であり、図８の構成におけるＢ面の断面を示している。   FIG. 9 is a cross-sectional view showing a prior art coil having the configuration described in Patent Document 1, and shows a cross section of the B surface in the configuration of FIG.

特許文献１では、図９のような、セラミック粒子１４を混入して成形した絶縁シート１５を、金属シート１００と重ねて巻き回したコイルとすることにより、絶縁シート１５の熱伝導率を増大させ、コイルの冷却性能を向上させる提案がなされている。   In Patent Document 1, the insulating sheet 15 formed by mixing ceramic particles 14 as shown in FIG. 9 is used as a coil wound around the metal sheet 100 to increase the thermal conductivity of the insulating sheet 15. There have been proposals to improve the cooling performance of the coil.

その一方、特許文献２では、平角線をエッジワイズ巻きし、表面が絶縁物で包囲されたたコイルを、軟磁性金属粉末と樹脂からなる磁芯に埋設した、主にリアクトルとして用いるのに好適なコイル部品の提案がなされている。   On the other hand, in Patent Document 2, a coil in which a rectangular wire is wound edgewise and its surface is surrounded by an insulator is embedded in a magnetic core made of soft magnetic metal powder and resin, and is suitable mainly for use as a reactor. Proposal of new coil parts has been made.

特開昭５８−７５８１８号公報JP 58-75818 A 特開２００６−４９５７号公報JP 2006-4957 A

特許文献２のようなコイル部品では、コイルに大電流が通電されるため、コイルからの放熱性を充分に高めておく必要がある。   In the coil component as in Patent Document 2, since a large current is passed through the coil, it is necessary to sufficiently enhance the heat dissipation from the coil.

そこで、特許文献１のような金属シート１００と絶縁シート１５を重ねて巻き回したコイルを特許文献２のコイルの構成に適用し、磁芯内部にコイルを埋設すると、金属シート１００と絶縁シート１５の間に図８に示すような隙間が生じることから、熱伝導が阻害されるという課題がある。   Therefore, when the coil obtained by overlapping and winding the metal sheet 100 and the insulating sheet 15 as in Patent Document 1 is applied to the coil configuration of Patent Document 2 and the coil is embedded in the magnetic core, the metal sheet 100 and the insulating sheet 15 are embedded. Since a gap as shown in FIG. 8 is generated between them, there is a problem that heat conduction is hindered.

従って本発明は、磁芯内部に埋設しても放熱性の高いコイル、及びそのコイルを用いたリアクトルを提供することを目的とする。   Accordingly, an object of the present invention is to provide a coil having high heat dissipation even when embedded in a magnetic core, and a reactor using the coil.

上記課題を本発明は、シート状導体と、無機物よりなる絶縁粒子が配合された接着剤を備え、前記シート状導体は前記接着剤を巻き込みつつ巻き軸を中心に巻き回されるとともに、前記シート状導体の層間は前記接着剤により接着され、前記絶縁粒子により電気絶縁距離が保たれているコイルによって解決する。   To solve the above problems, the present invention comprises a sheet-like conductor and an adhesive containing insulating particles made of an inorganic substance, and the sheet-like conductor is wound around a winding shaft while winding the adhesive, and the sheet. The problem is solved by a coil in which the layer between the conductors is bonded by the adhesive and the electric insulation distance is maintained by the insulating particles.

また、前記シート状導体の幅方向端部、最内周面、及び最外周面が前記接着剤で覆われていることが望ましい。   Moreover, it is preferable that the widthwise end, the innermost peripheral surface, and the outermost peripheral surface of the sheet-like conductor are covered with the adhesive.

また、前記絶縁粒子はアルミナ、酸化ケイ素、窒化ケイ素のいずれかを含むことが望ましい。   The insulating particles preferably include any one of alumina, silicon oxide, and silicon nitride.

また、前記絶縁粒子のＤ９０（累積重量分率が９０％に対応する粒子径）は１０μｍ以上、１００μｍ以下であることが望ましい。   The D90 (particle diameter corresponding to a cumulative weight fraction of 90%) of the insulating particles is preferably 10 μm or more and 100 μm or less.

また、前記シート状導体は、前記接着剤を含浸させた繊維状絶縁シートを巻き込みつつ巻き回されていることが望ましい。   Moreover, it is desirable that the sheet-like conductor is wound while winding a fibrous insulating sheet impregnated with the adhesive.

また、上記コイルと、軟磁性金属粒子及び結合材を主に含有する複合磁性体を備え、前記複合磁性体に前記コイルが埋設されているリアクトルとすることが望ましい。   In addition, it is desirable to provide a reactor in which the coil and a composite magnetic body mainly containing soft magnetic metal particles and a binder are provided, and the coil is embedded in the composite magnetic body.

本発明によって、磁芯に埋設しても放熱性の高いコイル、及びそのコイルを用いたリアクトルを提供することができる。   According to the present invention, it is possible to provide a coil having high heat dissipation even when embedded in a magnetic core, and a reactor using the coil.

本発明における実施形態１に係るコイルの斜視図である。It is a perspective view of the coil which concerns on Embodiment 1 in this invention. 本発明における実施形態１に係るコイルの断面図であり、図１におけるＡ面の断面図を示している。It is sectional drawing of the coil which concerns on Embodiment 1 in this invention, and has shown sectional drawing of the A surface in FIG. 本発明における実施形態１に係るコイルの巻き回し工程時の状態を示す説明図である。It is explanatory drawing which shows the state at the time of the winding process of the coil which concerns on Embodiment 1 in this invention. 本発明における実施形態２に係るコイルの巻き回し工程時の状態を示す説明図である。It is explanatory drawing which shows the state at the time of the winding process of the coil which concerns on Embodiment 2 in this invention. 本発明における実施形態２に係るコイルの断面図であり、図２の変形例に対応する。It is sectional drawing of the coil which concerns on Embodiment 2 in this invention, and respond | corresponds to the modification of FIG. 本発明における実施形態３に係るリアクトルの斜視図である。It is a perspective view of the reactor which concerns on Embodiment 3 in this invention. 本発明における実施形態３に係るリアクトルの断面図であり、図６におけるＡ’面の断面図を示している。It is sectional drawing of the reactor which concerns on Embodiment 3 in this invention, and has shown sectional drawing of the A 'surface in FIG. 従来技術のコイルを示す斜視図である。It is a perspective view which shows the coil of a prior art. 従来技術のコイルを示す断面図であり、図８におけるＢ面の断面を示している。It is sectional drawing which shows the coil of a prior art, and has shown the cross section of the B surface in FIG.

（実施形態１）
図１は、本発明における実施形態１に係るコイルの斜視図である。 (Embodiment 1)
FIG. 1 is a perspective view of a coil according to Embodiment 1 of the present invention.

表面が接着剤で覆われ、絶縁されたコイル１の内周面及び外周面へ、図示されないシート状導体へ通電するための端子２１、２２が接続されている。   Terminals 21 and 22 for energizing a sheet-like conductor (not shown) are connected to the inner and outer peripheral surfaces of the coil 1 whose surface is covered with an adhesive and insulated.

図２は、本発明における実施形態１に係るコイルの断面図であり、図１におけるＡ面の断面図を示している。   FIG. 2 is a cross-sectional view of the coil according to Embodiment 1 of the present invention, and shows a cross-sectional view of the A surface in FIG.

シート状導体１０の間は、無機物よりなる絶縁粒子１１を含有する接着剤１２により接着されている。   The sheet-like conductors 10 are bonded with an adhesive 12 containing insulating particles 11 made of an inorganic material.

ここで、シート状導体１０の間に、絶縁粒子１１を介さない部分があったとしても、シート状導体１０の剛性と、接着剤１２の未硬化時の粘性が充分であれば、周囲の絶縁粒子１１により充分な電気絶縁距離を確保することができる。   Here, even if there is a portion without the insulating particles 11 between the sheet-like conductors 10, if the rigidity of the sheet-like conductor 10 and the viscosity of the adhesive 12 when uncured are sufficient, the surrounding insulation A sufficient electrical insulation distance can be secured by the particles 11.

すなわち、接着剤１２中の絶縁粒子１１含有量、シート状導体１０の厚みや材質等による剛性、接着剤１２の粘性を調整することで、シート状導体１０間の電気絶縁距離を確保することが可能となる。   That is, the electrical insulation distance between the sheet-like conductors 10 can be ensured by adjusting the content of the insulating particles 11 in the adhesive 12, the rigidity depending on the thickness and material of the sheet-like conductor 10, and the viscosity of the adhesive 12. It becomes possible.

さらに、コイルの内周面１０１、外周面１０２、巻き軸方向の端面１０３、１０４が絶縁粒子１１を含有する接着剤１２により覆われているため、コイル表面の電気絶縁性及び放熱性が確保されている。   Furthermore, since the inner peripheral surface 101, the outer peripheral surface 102, and the end surfaces 103, 104 in the winding axis direction of the coil are covered with the adhesive 12 containing the insulating particles 11, the electrical insulation and heat dissipation of the coil surface are ensured. ing.

コイル表面を覆う接着剤１２の層の厚さは、充分な電気絶縁性を確保する上では１０μｍ以上であることが望ましく、充分な放熱性を確保する上では１ｍｍ以下であることが望ましい。   The thickness of the layer of the adhesive 12 covering the coil surface is desirably 10 μm or more for ensuring sufficient electrical insulation, and desirably 1 mm or less for ensuring sufficient heat dissipation.

図３は、本発明における実施形態１に係るコイルの巻き回し工程時の状態を示す説明図である。   FIG. 3 is an explanatory diagram illustrating a state during a coil winding process according to the first embodiment of the present invention.

コイルの巻き回し工程は、分割可能な巻き芯３１にシート状導体１０の始端部を固定し、接着剤供給部３２よりシート状導体１０が巻き込まれる面に絶縁粒子１１を含有する未硬化の接着剤１２塗布しつつ巻き回すことによって行われる。   In the coil winding step, the starting end portion of the sheet-like conductor 10 is fixed to the core 31 that can be divided, and the uncured adhesion containing the insulating particles 11 on the surface on which the sheet-like conductor 10 is wound from the adhesive supply portion 32. It is performed by winding while applying the agent 12.

巻き回し工程時は、接着剤１２が未硬化であるため、接着剤１２の粘性によりシート状導体１０の巻きずれを抑制することができる。   Since the adhesive 12 is uncured during the winding step, the winding deviation of the sheet-like conductor 10 can be suppressed by the viscosity of the adhesive 12.

接着剤１２としては、熱硬化性エポキシ樹脂などが例示される。   Examples of the adhesive 12 include a thermosetting epoxy resin.

ここで、巻き回し工程終了後にコイルを外しやすくするため、巻き芯３１表面に潤滑剤を塗布しておくことが望ましい。   Here, it is desirable to apply a lubricant to the surface of the winding core 31 in order to make it easy to remove the coil after the winding process.

シート状導体１０がコイルとして巻き芯３１に巻き取られる際、シート状導体１０は幅方向両端部に至るまで絶縁粒子１１を含有する接着剤１２により全て覆われるように接着剤供給部３２からの供給量を調整する。これにより、シート状導体１０の層間を絶縁粒子１１及び接着剤１２を介して隙間無く接着することが可能となる。   When the sheet-like conductor 10 is wound around the winding core 31 as a coil, the sheet-like conductor 10 from the adhesive supply unit 32 is covered with the adhesive 12 containing the insulating particles 11 until reaching both ends in the width direction. Adjust the supply amount. Thereby, it becomes possible to adhere | attach the interlayer of the sheet-like conductor 10 through the insulating particle 11 and the adhesive agent 12 without a gap.

すなわち本発明は、シート状導体１０と、無機物よりなる絶縁粒子１１が配合された接着剤１２を備え、シート状導体１０は絶縁粒子１１及び接着剤１２を巻き込みつつ巻き軸を中心に巻き回され、シート状導体１０の層間は接着剤１２により接着され、シート状導体１０の層間は絶縁粒子１１により電気絶縁距離が保たれているコイル１の実施形態を取り得る。   That is, the present invention includes a sheet-like conductor 10 and an adhesive 12 in which insulating particles 11 made of an inorganic material are blended. The sheet-like conductor 10 is wound around a winding shaft while the insulating particles 11 and the adhesive 12 are wound around. An embodiment of the coil 1 in which the interlayer of the sheet-like conductor 10 is bonded by the adhesive 12 and the electrical insulation distance is maintained by the insulating particles 11 between the layers of the sheet-like conductor 10 can be taken.

シート状導体１０間を接着することにより、シート状導体１０間に隙間が発生することを防ぐことができるため、シート状導体１０間の熱伝導率を高めることができる。   Since the gap between the sheet-like conductors 10 can be prevented by bonding the sheet-like conductors 10, the thermal conductivity between the sheet-like conductors 10 can be increased.

但し、単にシート状導体１０間を接着しただけではシート状導体１０間の充分な電気絶縁性を確保することが困難となるため、絶縁粒子１１を接着剤１２に予め配合しておくことで、シート状導体１０間の絶縁距離を確保することが可能となり、より確実な電気絶縁性を確保しつつ、絶縁粒子１１により熱伝導率をさらに高めるという相乗効果を得ることができる。   However, since it is difficult to ensure sufficient electrical insulation between the sheet-like conductors 10 simply by bonding the sheet-like conductors 10, by premixing the insulating particles 11 in the adhesive 12, The insulation distance between the sheet-like conductors 10 can be ensured, and a synergistic effect of further increasing the thermal conductivity by the insulating particles 11 can be obtained while ensuring more reliable electrical insulation.

また、本発明は、シート状導体１０の幅方向の端面１０３、内周面１０１、及び外周面１０２が絶縁粒子１１の配合された接着剤１２で覆われているコイルの実施形態を取り得る。   Further, the present invention can take an embodiment of a coil in which the end surface 103 in the width direction, the inner peripheral surface 101, and the outer peripheral surface 102 of the sheet-like conductor 10 are covered with the adhesive 12 in which the insulating particles 11 are mixed.

シート状導体１０を巻き回す際、接着剤１２は液状、もしくは軟化しているため、シート状導体１０の幅方向端部よりはみ出す接着剤１２を利用し、必要に応じ内周面１０１、外周面１０２へ接着剤１２を塗布、浸漬等することにより、コイル１表面での絶縁性を確保することができる。   When the sheet-like conductor 10 is wound, the adhesive 12 is liquid or soft. Therefore, the adhesive 12 that protrudes from the end in the width direction of the sheet-like conductor 10 is used. By applying, dipping, etc., the adhesive 12 to 102, the insulation on the surface of the coil 1 can be ensured.

このように構成することで、コイル１表面を覆う接着剤１２とシート状導体１０の隙間が生じることを防ぎ、シート状導体１０からコイル１表面への放熱性が向上する。   By comprising in this way, it is prevented that the clearance gap between the adhesive agent 12 which covers the coil 1 surface, and the sheet-like conductor 10 arises, and the heat dissipation from the sheet-like conductor 10 to the coil 1 surface improves.

また、絶縁粒子１１はアルミナ、酸化ケイ素、窒化ケイ素のいずれを含むことが望ましい。   The insulating particles 11 desirably contain any of alumina, silicon oxide, and silicon nitride.

これらの絶縁粒子１１は熱伝導率が高いためである。   This is because these insulating particles 11 have high thermal conductivity.

また、絶縁粒子１１のＤ９０（累積重量分率が９０％に対応する粒子径）は１０μｍ以上、１００μｍ以下であることが望ましい。   Further, D90 (particle diameter corresponding to a cumulative weight fraction of 90%) of the insulating particles 11 is desirably 10 μm or more and 100 μm or less.

より確実な電気絶縁性を確保するには、Ｄ９０が１０μｍ以上あることが望ましく、シート状導体１０間の熱伝導率を充分に高めるには、Ｄ９０が１００μｍ以下であることが望ましいからである。   This is because D90 is desirably 10 μm or more in order to ensure more reliable electrical insulation, and D90 is desirably 100 μm or less in order to sufficiently increase the thermal conductivity between the sheet-like conductors 10.

シート状導体１０としては、厚さ１００μｍ未満の銅箔を用いても良いが、大電流通電に耐え、充分な放熱性が得られるよう、厚さが１００μｍ以上、１ｍｍ以下の銅板を用いるのが望ましい。   As the sheet-like conductor 10, a copper foil having a thickness of less than 100 μm may be used, but a copper plate having a thickness of 100 μm or more and 1 mm or less is used so as to withstand large current conduction and obtain sufficient heat dissipation. desirable.

また、コイルより充分な放熱を行う上では、シート状導体１０の幅／厚み比が１４以上であることが望ましく、５０以上であれば、より望ましい。   In order to sufficiently dissipate heat from the coil, the width / thickness ratio of the sheet-like conductor 10 is desirably 14 or more, and more desirably 50 or more.

同様の理由により、接着剤１２の層における熱伝導率は０．２Ｗ／ｍ・Ｋ以上が望ましく、２Ｗ／ｍ・Ｋ以上であれば、より望ましい。   For the same reason, the thermal conductivity in the layer of the adhesive 12 is preferably 0.2 W / m · K or more, more preferably 2 W / m · K or more.

（実施形態２）
図４は、本発明における実施形態２に係るコイルの巻き回し工程時の状態を示す説明図である。 (Embodiment 2)
FIG. 4 is an explanatory diagram showing a state during a coil winding process according to the second embodiment of the present invention.

実施形態１における図３とは、シート状導体１０上に繊維状絶縁シート１３を重ね、繊維状絶縁シート１３上に接着剤供給部３２より絶縁粒子１１を含有する接着剤１２を塗布する点が相違する。   3 in Embodiment 1 is that the fibrous insulating sheet 13 is overlaid on the sheet-like conductor 10 and the adhesive 12 containing the insulating particles 11 is applied onto the fibrous insulating sheet 13 from the adhesive supply section 32. Is different.

繊維状絶縁シート１３は、絶縁粒子１１及び接着剤１２が透過するほど粗であるため、繊維状絶縁シート１３は絶縁粒子１１及び接着剤１２に含浸された状態でシート状導体１０に挟まれ接着される。   Since the fibrous insulating sheet 13 is so rough that the insulating particles 11 and the adhesive 12 are permeated, the fibrous insulating sheet 13 is sandwiched between the sheet-like conductor 10 in a state where the fibrous insulating sheet 13 is impregnated with the insulating particles 11 and the adhesive 12. Is done.

図５は、本発明における実施形態２に係るコイルの断面図であり、図２の変形例に対応する。   FIG. 5 is a cross-sectional view of the coil according to the second embodiment of the present invention, and corresponds to the modification of FIG.

本実施形態の巻き回し工程により作成したコイルは、シート状導体１０間に繊維状絶縁シート１３を介在しつつ接着されている。   The coil created by the winding process of the present embodiment is bonded with the fibrous insulating sheet 13 interposed between the sheet-like conductors 10.

従って、繊維状絶縁シート１３によりシート状導体１０の層間距離が、実施形態１よりも確実に確保できるため、層間の電気絶縁性を、より確実に確保することができる。   Therefore, since the inter-layer distance of the sheet-like conductor 10 can be ensured more reliably than the first embodiment by the fibrous insulating sheet 13, the electrical insulation between the layers can be more reliably ensured.

（実施形態３）
図６は、本発明における実施形態３に係るリアクトルの斜視図である。 (Embodiment 3)
FIG. 6 is a perspective view of the reactor according to the third embodiment of the present invention.

実施形態１や実施形態２で述べたコイル１を、磁芯となる複合磁性体４の中に埋設して、リアクトルを構成している。   The coil 1 described in the first embodiment or the second embodiment is embedded in a composite magnetic body 4 serving as a magnetic core to constitute a reactor.

複合磁性体４は、軟磁性粉を結合材に添加したものであり、未硬化の状態で液状か、もしくは軟化している。   The composite magnetic body 4 is obtained by adding soft magnetic powder to a binder, and is liquid or softened in an uncured state.

軟磁性粉としては、飽和磁化の高い、Ｆｅ−Ｓｉ系等の金属磁性粉が望ましい。   As the soft magnetic powder, metal magnetic powder such as Fe-Si series having high saturation magnetization is desirable.

結合材は、熱硬化性エポキシ樹脂等が例示される。   Examples of the binding material include a thermosetting epoxy resin.

図７は、本発明における実施形態３に係るリアクトルの断面図であり、図６におけるＡ’面の断面図を示している。   FIG. 7 is a cross-sectional view of the reactor according to the third embodiment of the present invention, and shows a cross-sectional view of the A ′ plane in FIG. 6.

コイル１による磁束Ｂは複合磁性体４中にある。図中矢印は磁束Ｂの経路を示している。コイル１表面が絶縁粒子を配合した接着剤で覆われているため、複合磁性体４へコイル１を埋設しても、複合磁性体４とコイル１の電気絶縁性を確実なものとしつつ、コイル１内部のシート状導体から複合磁性体４への放熱性を高めることができる。   The magnetic flux B generated by the coil 1 is in the composite magnetic body 4. The arrows in the figure indicate the path of the magnetic flux B. Since the surface of the coil 1 is covered with an adhesive containing insulating particles, even if the coil 1 is embedded in the composite magnetic body 4, the electrical insulation between the composite magnetic body 4 and the coil 1 is ensured while the coil 1 is secured. The heat dissipation from the sheet-like conductor inside 1 to the composite magnetic body 4 can be enhanced.

ここで、コイル１から複合磁性体４への充分な放熱性を確保する上では、複合磁性体の熱伝導率は、４Ｗ／ｍ・Ｋ以上であることが望ましい。   Here, in order to ensure sufficient heat dissipation from the coil 1 to the composite magnetic body 4, it is desirable that the thermal conductivity of the composite magnetic body is 4 W / m · K or more.

１ コイル
４ 複合磁性体
１０ シート状導体
１１ 絶縁粒子
１２ 接着剤
１３ 繊維状絶縁シート
１４ セラミック粒子
１５ 絶縁シート
２１、２２ 端子
３１ 芯
３２ 接着剤供給部
１００ 金属シート
１０１ 内周面
１０２ 外周面
１０３、１０４ 端面
Ｂ 磁束 DESCRIPTION OF SYMBOLS 1 Coil 4 Composite magnetic body 10 Sheet-like conductor 11 Insulating particle 12 Adhesive agent 13 Fibrous insulating sheet 14 Ceramic particle 15 Insulating sheet 21, 22 Terminal 31 Core 32 Adhesive supply part 100 Metal sheet 101 Inner peripheral surface 102 Outer peripheral surface 103, 104 End face B Magnetic flux

Claims (6)

シート状導体と、
無機物よりなる絶縁粒子が配合された接着剤を備え、
前記シート状導体は前記接着剤を巻き込みつつ巻き軸を中心に巻き回され、
前記シート状導体の層間は前記接着剤により接着されるとともに、
前記絶縁粒子により電気絶縁距離が保たれていることを特徴とするコイル。 A sheet-like conductor;
Provided with an adhesive containing insulating particles made of inorganic material,
The sheet-like conductor is wound around a winding axis while winding the adhesive,
While the interlayer of the sheet-like conductor is bonded by the adhesive,
An electrical insulation distance is maintained by the insulating particles. 前記シート状導体の幅方向端部、最内周面、及び最外周面が前記接着剤で覆われていることを特徴とする請求項１に記載のコイル。   The coil according to claim 1, wherein an end portion in the width direction, the innermost peripheral surface, and the outermost peripheral surface of the sheet-like conductor are covered with the adhesive. 前記絶縁粒子はアルミナ、酸化ケイ素、窒化ケイ素のいずれかを含むことを特徴とする請求項１または請求項２に記載のコイル。   The coil according to claim 1, wherein the insulating particles include any one of alumina, silicon oxide, and silicon nitride. 前記絶縁粒子のＤ９０（累積重量分率が９０％に対応する粒子径）は１０μｍ以上、１００μｍ以下であることを特徴とする請求項１から請求項３のいずれかに記載のコイル。   The coil according to any one of claims 1 to 3, wherein D90 (particle diameter corresponding to a cumulative weight fraction of 90%) of the insulating particles is 10 µm or more and 100 µm or less. 前記シート状導体は、前記接着剤を含浸させた繊維状絶縁シートを巻き込みつつ巻き回されていることを特徴とする請求項１から請求項４のいずれかに記載のコイル。   The coil according to any one of claims 1 to 4, wherein the sheet-like conductor is wound while winding a fibrous insulating sheet impregnated with the adhesive. 請求項１から請求項５のいずれかに記載のコイルと、
軟磁性金属粒子及び結合材を主に含有する複合磁性体を備え、
前記複合磁性体に前記コイルが埋設されていることを特徴とするリアクトル。 A coil according to any one of claims 1 to 5,
Comprising a composite magnetic body mainly containing soft magnetic metal particles and a binder;
A reactor in which the coil is embedded in the composite magnetic body.
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