JPH043653B2 - - Google Patents

Info

Publication number
JPH043653B2
JPH043653B2 JP59109965A JP10996584A JPH043653B2 JP H043653 B2 JPH043653 B2 JP H043653B2 JP 59109965 A JP59109965 A JP 59109965A JP 10996584 A JP10996584 A JP 10996584A JP H043653 B2 JPH043653 B2 JP H043653B2
Authority
JP
Japan
Prior art keywords
electrical insulator
metal case
resin
coil member
holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP59109965A
Other languages
Japanese (ja)
Other versions
JPS60254604A (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP59109965A priority Critical patent/JPS60254604A/en
Publication of JPS60254604A publication Critical patent/JPS60254604A/en
Publication of JPH043653B2 publication Critical patent/JPH043653B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • H01F27/022Encapsulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Insulating Of Coils (AREA)
  • Transformer Cooling (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Coils Or Transformers For Communication (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、コイルやトランスのような各種巻線
部材を金属ケース内に収納して樹脂モールドして
なる巻線部品に関し、更に詳しくは、金属ケース
の内面に沿つて配置する容器状の電気絶縁物を多
孔部材とすることによつて、モールド樹脂が金属
ケースの内面にまで達するようにした巻線部品に
関するものである。従つて本発明は、特に限定さ
れるものではないが、例えばノイズフイルタや苛
酷な環境条件で使用され、高信頼性が要求される
ような電源トランス等において、コイル部材を樹
脂充填剤と一緒に金属ケースに封入して密閉構造
としたいような場合に有効な構造である。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a winding component in which various winding members such as coils and transformers are housed in a metal case and molded with resin. This invention relates to a wire-wound component in which a container-shaped electrical insulator disposed along the inner surface of the metal case is made into a porous member so that the molded resin can reach the inner surface of the metal case. Therefore, the present invention is applicable to, but not limited to, a coil member together with a resin filler, for example, in a noise filter or a power transformer that is used under harsh environmental conditions and requires high reliability. This structure is effective when it is desired to seal the structure by enclosing it in a metal case.

〔従来の技術〕[Conventional technology]

電子機器の高周波化と放射雑音妨害に対する規
制からノイズの侵入・発生を防止すべく各電子機
器にはノイズフイルタが実装されている。このノ
イズフイルタは基本的には一種のローパス・フイ
ルタであり、磁心に巻線を施したインダクタが用
いられている。ノイズフイルタの場合、電磁シー
ルドの機能と放熱機能を果たさせるため金属ケー
スが用いられており、その内部にコイル部材を収
納して樹脂充填剤で封止される構造が一般的であ
る。
Due to the increasing frequency of electronic devices and regulations regarding radiated noise interference, each electronic device is equipped with a noise filter to prevent the intrusion and generation of noise. This noise filter is basically a type of low-pass filter, and uses an inductor with a magnetic core wound around it. In the case of a noise filter, a metal case is used to perform electromagnetic shielding and heat dissipation functions, and a coil member is generally housed inside the case and sealed with a resin filler.

しかし、近年の部品の小型化への強い要求に伴
い、コイル部材と金属ケースとの間隔が非常に狭
くなつてきており、コイル部材挿入時並びに樹脂
封入時における位置ずれなどによる寸法上のばら
つきから、単にコイル部材を金属ケース内に組み
込んだだけでは各種安全規格に対処することが困
難となつている。そこで従来技術においては、金
属ケースの内面に沿つて容器状の電気絶縁物が嵌
入し、その内側にコイル部材を設置してその周囲
の間隙部を熱伝導性の良好な樹脂でモールドする
構造が採用されている。
However, in recent years, with the strong demand for smaller parts, the distance between the coil member and the metal case has become extremely narrow, resulting in dimensional variations due to positional misalignment when inserting the coil member and enclosing it in resin. However, it has become difficult to comply with various safety standards by simply incorporating a coil member into a metal case. Therefore, in the conventional technology, a container-shaped electrical insulator is fitted along the inner surface of a metal case, a coil member is installed inside it, and the gap around it is molded with a resin with good thermal conductivity. It has been adopted.

また、電源トランス等においても、苛酷な環境
条件で使用され、特に高信頼性を要求されるもの
については、トランス本体を充填剤と一緒に金属
ケースに封入して密閉構造とする場合も多い。
Furthermore, for power transformers and the like that are used under harsh environmental conditions and require particularly high reliability, the transformer body is often enclosed in a metal case together with a filler to form a sealed structure.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記のように従来の樹脂モールド構造では、コ
イル部材への通電により線材自身の損失として生
じる発熱(所謂銅損による発熱)や磁心からの発
熱(所謂鉄損による発熱)等は、コイル部材から
モールド樹脂、容器状電気絶縁物、金属ケース、
外気へと伝達され放熱されている。しかし、ここ
で用いられている電気絶縁物は、通常、熱伝導性
があまりよくないものが多く、放熱しにくいとい
う問題がある。また、樹脂モールド時に、金属ケ
ースとそれに嵌入される容器状の電気絶縁物との
間に空気層ができやすく、この空気層が断熱作用
を果たすため放熱性が悪くなるという問題もあつ
た。
As mentioned above, in the conventional resin mold structure, the heat generated as a loss in the wire itself due to energization of the coil member (so-called heat generation due to copper loss) and the heat generated from the magnetic core (so-called heat generation due to iron loss) are transferred from the coil member to the mold. resin, container-shaped electrical insulators, metal cases,
Heat is transferred to the outside air and radiated. However, many of the electrical insulators used here usually have poor thermal conductivity, making it difficult to dissipate heat. Furthermore, during resin molding, an air layer tends to form between the metal case and the container-shaped electrical insulator fitted therein, and this air layer acts as a heat insulator, resulting in poor heat dissipation.

このように従来技術によれば、内部に挿入され
るコイル部材に対して金属ケースをできる限り小
さくしていこうとすれば、両者間の必要最小限度
の間隔を確保するため電気絶縁物を使用せざるを
えず、その結果放熱性が悪くなりコイル部材の信
頼性が著しく低下してしまうという大きな問題が
あつたし、逆に放熱性を良好にしようとすれば金
属ケースを大きくせざるをえず、部品の小型化と
いう時代の流れに逆行し好ましくないのである。
In this way, according to the prior art, if the metal case is to be made as small as possible with respect to the coil member inserted inside, an electrical insulator must be used to ensure the minimum necessary spacing between the two. As a result, there was a big problem in that heat dissipation deteriorated and the reliability of the coil components was significantly reduced.On the other hand, if you wanted to improve heat dissipation, you would have to make the metal case larger. First, this is undesirable because it goes against the trend of smaller parts.

本発明の目的は、このような従来技術の欠点を
解消し、内部に収納されるコイル部材に対して金
属ケースをぎりぎりまで小さくすることができる
とともに、放熱性を向上させ、小型で信頼性の高
い巻線部品を提供することにある。
The purpose of the present invention is to eliminate such drawbacks of the prior art, to make the metal case as small as possible compared to the coil member housed inside, to improve heat dissipation, and to provide a compact and reliable design. Our goal is to provide high quality winding components.

〔問題点を解決するための手段〕[Means for solving problems]

このような問題点を解決することのできる本発
明は、金属ケースの内面に沿つて容器状の電気絶
縁物を嵌入し、該電気絶縁物の内側にコイル部材
を設置してその周囲の間隙部を熱伝導性の良好な
樹脂でモールドする巻線部品において、特にその
容器状の電気絶縁物の構造と樹脂によるモールド
状態に工夫を施したものである。即ち本発明にお
いては、電気絶縁物はその壁面に多数の貫通孔が
形成された構造をなし、モールド樹脂が該貫通孔
を通つて金属ケースの内面にまで達するような構
造としたものであり、まさにこのような構造とし
たところに特徴を有するものである。
The present invention, which can solve these problems, involves fitting a container-shaped electrical insulator along the inner surface of a metal case, installing a coil member inside the electrical insulator, and filling the gap around the electrical insulator. This is a wire-wound component that is molded with a resin with good thermal conductivity, and the structure of the container-shaped electrical insulator and the state of the resin molding have been particularly devised. That is, in the present invention, the electrical insulator has a structure in which a large number of through holes are formed in its wall surface, and the molding resin reaches the inner surface of the metal case through the through holes. This type of structure is exactly what makes it unique.

なお、本発明においてコイル部材とは、「線材
が巻き付けられて電気通路を構成している部材」
というように広義に解すべきものである。従つ
て、電気回路内で他の磁束と鎖交せずに自己イン
ダクタンスとして作用する狭義のコイルのみなら
ず、共通の磁気回路をもつコイルを複数個組み合
わせて電磁誘導現象を利用して変圧器作用を行う
トランスの場合等も含まれるものである。
In addition, in the present invention, a coil member is "a member around which a wire is wound to form an electrical path."
It should be interpreted in a broad sense. Therefore, in addition to a narrowly defined coil that acts as a self-inductance without interlinking with other magnetic fluxes in an electric circuit, it is also possible to combine multiple coils with a common magnetic circuit and use the electromagnetic induction phenomenon to function as a transformer. This also includes the case of transformers that perform

〔作 用〕[Effect]

このような構造とすると、モールドした樹脂
は、前記のように電気絶縁物に形成した多数の貫
通孔の内部に入り込み、そこを通つて金属ケース
の内面に密着するように完全に充填されることに
なる。その結果、電気絶縁物はその内部でコイル
部材を支え、コイル部材と金属ケースとの間隔を
保ち、十分な電気絶縁性を保証する機能を果た
し、それに対してモールド樹脂はコイル部材で発
生した熱を金属ケースに直接伝達する機能を果た
すことになる。その結果、全体として安全規格に
適合するような十分な電気絶縁性を有するととも
に、放熱性を著しく改善することができるのであ
る。
With this structure, the molded resin enters into the numerous through holes formed in the electrical insulator as described above, and completely fills the inner surface of the metal case through them. become. As a result, the electrical insulator has the function of supporting the coil member within itself, maintaining the distance between the coil member and the metal case, and ensuring sufficient electrical insulation, while the molding resin has the function of supporting the coil member, maintaining the distance between the coil member and the metal case, and ensuring sufficient electrical insulation. It functions to directly transmit the information to the metal case. As a result, it has sufficient electrical insulation properties to meet safety standards as a whole, and can significantly improve heat dissipation.

以下本発明について更に詳しく説明する。 The present invention will be explained in more detail below.

実施例 1 第1図は本発明にかかる巻線部品の一実施例を
示す断面図であり、第2図はそれに用いた電気絶
縁物の説明図である。本発明にかかる巻線部品
は、基本的には従来と略同様の構成であり、取り
付けフランジ1aを有する容器状の金属ケース1
の内面に沿つて、同じく容器状の電気絶縁物を嵌
入し、該電気絶縁物2の内側にコイル部材3を設
置してその周囲の間隙部を熱伝導性の良好な樹脂
4でモールドしてなる構造である。コイル部材
は、例えばトロイダル状等のフエライトコア5の
周囲をコアカバー6で覆い、その回りに線材7を
巻き付けた構造のものである。
Example 1 FIG. 1 is a cross-sectional view showing an example of a winding component according to the present invention, and FIG. 2 is an explanatory diagram of an electrical insulator used therein. The winding component according to the present invention basically has substantially the same configuration as the conventional one, and includes a container-shaped metal case 1 having a mounting flange 1a.
A similarly container-shaped electrical insulator is fitted along the inner surface of the electrical insulator 2, a coil member 3 is installed inside the electrical insulator 2, and the gap around the coil member 3 is molded with a resin 4 having good thermal conductivity. This is the structure. The coil member has a structure in which, for example, a toroidal ferrite core 5 is covered with a core cover 6, and a wire 7 is wound around the core cover 6.

ここで本発明が従来技術と顕著に相違する点
は、金属ケース1の内面に密着する如く嵌入され
る容器状の電気絶縁物2の構造である。即ちこの
電気絶縁物2は、第2図からも明らかなように、
その壁面に多数の貫通孔8が形成された構造をな
している。この場合各貫通孔8の形状は、第2図
に示すようなものとするのが望ましい。即ち電気
絶縁物2の四つの側面においてはいずれも貫通孔
8の方向が壁面に対して垂直ではなく、鉛直方向
に傾いた状態で形成するのである。実際に樹脂を
モールドする場合には、第1図とは丁度逆向き
に、金属ケース1の電気絶縁物2の開放面が上を
向くように容器状にセツトされて、その状態で樹
脂4が注入される。従つて第2図に示すように電
気絶縁物2の側面に形成する貫通孔8を下向きに
しておけば、モールドされる樹脂の流れが良好と
なり、各貫通孔8の隅々にまで充填され、内部に
空気層が生じるのを防ぎ、金属ケース1の内面に
達するように完全に充填されるのである。
Here, the present invention is significantly different from the prior art in the structure of the container-shaped electrical insulator 2 that is fitted tightly into the inner surface of the metal case 1. That is, as is clear from FIG. 2, this electrical insulator 2
It has a structure in which a large number of through holes 8 are formed in the wall surface. In this case, the shape of each through hole 8 is preferably as shown in FIG. 2. That is, on all four side surfaces of the electrical insulator 2, the through holes 8 are formed not perpendicularly to the wall surface but inclined in the vertical direction. When actually molding the resin, the electrical insulator 2 of the metal case 1 is set in a container shape with the open side facing upward, in the opposite direction to that shown in FIG. Injected. Therefore, if the through holes 8 formed in the side surface of the electrical insulator 2 are oriented downward as shown in FIG. 2, the resin to be molded will flow well and will fill every corner of each through hole 8. This prevents the formation of an air layer inside and completely fills the metal case 1 so that it reaches the inner surface.

本発明によれば第1図から明らかなように、電
気絶縁物2に多数の貫通孔8が形成されており、
しかもその内部にモールド樹脂4が充填されかつ
その樹脂4は金属ケース1の内壁に接触するよう
になつているため、コイル部材3から発生した熱
の大部分は、該コイル部材3から樹脂4、金属ケ
ース1を伝わつて外気に伝達され、その結果放熱
作用が著しく改善されるのである。
According to the present invention, as is clear from FIG. 1, a large number of through holes 8 are formed in the electrical insulator 2,
Moreover, since the inside thereof is filled with mold resin 4 and the resin 4 is in contact with the inner wall of the metal case 1, most of the heat generated from the coil member 3 is transferred from the coil member 3 to the resin 4, The heat is transmitted to the outside air through the metal case 1, and as a result, the heat dissipation effect is significantly improved.

実施例 2 第3図は本発明にかかる巻線部品の他の実施例
を示す断面図であり、第4図はそれに用いる電気
絶縁物の一例を示す説明図である。この実施例も
基本的には前述したものと略同様であるが、電気
絶縁物12の構造に別の工夫が施されている。第
4図から明らかなように、容器状の電気絶縁物1
2はその四隅に突起12aが設けられているとと
もに、金属ケース1の内側面に対して適度の間隙
をもつて挿入されるようなやや小さめの形状とな
つている。各壁面に貫通孔18が形成されている
点は前記の実施例の場合とまつたく同様である。
この場合、側壁の貫通孔18は壁面に対して直角
な方向であつてもよい。金属ケース1の内部にこ
のような構造の電気絶縁物12を挿入し、その内
部にコイル部材3を収納する。第3図からも明ら
かなように、金属ケース1と電気絶縁物12との
間には適度な間隙が形成されることになる。この
ような状態としたのち、熱伝導性の良好な樹脂4
をモールドするのである。モールドされた樹脂4
は、電気絶縁物12に形成されている多数の貫通
孔18を通つて、該電気絶縁物12と金属ケース
1との間に回り込み、空気層が生成されることな
く完全に充填されることになる。
Embodiment 2 FIG. 3 is a sectional view showing another embodiment of the winding component according to the present invention, and FIG. 4 is an explanatory diagram showing an example of an electrical insulator used therein. This embodiment is also basically similar to the one described above, but the structure of the electrical insulator 12 is modified in a different way. As is clear from FIG. 4, a container-shaped electrical insulator 1
2 is provided with protrusions 12a at its four corners, and has a slightly smaller shape so that it can be inserted into the inner surface of the metal case 1 with an appropriate gap. The point that through holes 18 are formed in each wall surface is exactly the same as in the previous embodiment.
In this case, the through hole 18 in the side wall may be perpendicular to the wall surface. The electrical insulator 12 having such a structure is inserted into the metal case 1, and the coil member 3 is housed therein. As is clear from FIG. 3, an appropriate gap is formed between the metal case 1 and the electrical insulator 12. After achieving this condition, resin 4 with good thermal conductivity is
It is molded. molded resin 4
passes through a large number of through holes 18 formed in the electrical insulator 12 and wraps around between the electrical insulator 12 and the metal case 1, and is completely filled without creating an air layer. Become.

このような構造の巻線部品におけるコイル部材
3からの放熱のメカニズムは、前記実施例に関連
して説明したものとまつたく同様である。この実
施例においては電気絶縁物12と金属ケース1と
の間に積極的に隙間を設けることにより、樹脂が
回り込み易いように工夫されているのである。
The mechanism of heat dissipation from the coil member 3 in the winding component having such a structure is exactly the same as that described in connection with the previous embodiment. In this embodiment, a gap is actively provided between the electrical insulator 12 and the metal case 1 so that the resin can easily wrap around.

〔発明の効果〕〔Effect of the invention〕

本発明は上記のように構成した巻線部品である
から、電気絶縁物が内側に挿入されているため、
金属ケースの寸法をコイル部材を収納しうる最小
限度の大きさとすることができ、部品の大幅な小
型化を実現することができるのは無論のこと、一
般に熱伝導性があまり良くないとされている電気
絶縁物に多数の貫通孔を形成してその内部および
それを通つて金属ケースに密着するように熱伝導
性の良い樹脂を注入しているので、コイル部材で
発生した熱は該樹脂および金属ケースを通つて外
気に放熱されるし、またそのため絶縁物と金属ケ
ースとの間に空気の層が生じることもなく、それ
らが相俟つて熱抵抗を大幅に減少し放熱効率を高
めコイル部材の信頼性を著しく向上させることが
できるとともに、コイルへの通電容量を増大しう
るなど、部品の小型化ならびに高性能化、高信頼
度を実現しうる点で甚だすぐれた効果を奏しうる
ものである。
Since the present invention is a winding component configured as described above, an electrical insulator is inserted inside, so that
Not only can the dimensions of the metal case be reduced to the minimum size necessary to accommodate the coil components, but the components can also be significantly miniaturized. A large number of through holes are formed in the electrical insulator, and a resin with good thermal conductivity is injected into the inside and through the holes so as to be in close contact with the metal case, so the heat generated in the coil member is transferred to the resin and through the holes. Heat is dissipated to the outside air through the metal case, and there is no air layer between the insulator and the metal case, which together greatly reduces thermal resistance and increases heat dissipation efficiency. In addition to significantly improving the reliability of the coil, it can also increase the current carrying capacity of the coil, which can be extremely effective in making parts smaller, improving performance, and achieving high reliability. be.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る巻線部品の一実施例を示
す断面図、第2図はそれに用いる電気絶縁物の説
明図、第3図は本発明に係る巻線部品の他の実施
例を示す断面図、第4図はそれに用いる電気絶縁
物の説明図である。 1……金属ケース、2,12……電気絶縁物、
3……コイル部材、4……モールド樹脂、8,1
8……貫通孔。
FIG. 1 is a sectional view showing one embodiment of the winding component according to the present invention, FIG. 2 is an explanatory diagram of an electrical insulator used therein, and FIG. 3 is a cross-sectional view showing another embodiment of the winding component according to the present invention. The sectional view shown in FIG. 4 is an explanatory diagram of the electrical insulator used therein. 1... Metal case, 2, 12... Electrical insulator,
3...Coil member, 4...Mold resin, 8,1
8...Through hole.

Claims (1)

【特許請求の範囲】[Claims] 1 金属ケースの内面に沿つて容器状の電気絶縁
物を嵌入し、該電気絶縁物の内側にコイル部材を
設置してその周囲の間隙部を熱伝導性の良好な樹
脂でモールドしてなる巻線部品において、前記電
気絶縁物はその壁面に多数の貫通孔が形成された
構造をなし、前記樹脂が該貫通孔を通つて前記金
属ケースの内面に達するようにモールドされてい
ることを特徴とする巻線部品。
1 A coil made by fitting a container-shaped electrical insulator along the inner surface of a metal case, installing a coil member inside the electrical insulator, and molding the gap around it with a resin with good thermal conductivity. In the wire component, the electrical insulator has a structure in which a large number of through holes are formed in the wall surface thereof, and the resin is molded so as to reach the inner surface of the metal case through the through holes. winding parts.
JP59109965A 1984-05-30 1984-05-30 Winding parts Granted JPS60254604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59109965A JPS60254604A (en) 1984-05-30 1984-05-30 Winding parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59109965A JPS60254604A (en) 1984-05-30 1984-05-30 Winding parts

Publications (2)

Publication Number Publication Date
JPS60254604A JPS60254604A (en) 1985-12-16
JPH043653B2 true JPH043653B2 (en) 1992-01-23

Family

ID=14523638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59109965A Granted JPS60254604A (en) 1984-05-30 1984-05-30 Winding parts

Country Status (1)

Country Link
JP (1) JPS60254604A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012199350A (en) * 2011-03-22 2012-10-18 Panasonic Corp Case mold type capacitor
JP2013201376A (en) * 2012-03-26 2013-10-03 Panasonic Corp Reactor device
EP3330983B1 (en) * 2016-11-30 2023-10-04 Danfoss Editron Oy An inductive device
JP6597576B2 (en) * 2016-12-08 2019-10-30 株式会社村田製作所 Inductor and DC-DC converter
JP6522052B2 (en) 2017-06-27 2019-05-29 矢崎総業株式会社 Noise reduction unit
JP6651592B1 (en) * 2018-10-12 2020-02-19 三菱電機株式会社 Reactor cooling structure and power converter
DE102019208829A1 (en) * 2019-06-18 2020-12-24 Robert Bosch Gmbh Encased component and process for its manufacture

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5615011A (en) * 1979-07-18 1981-02-13 Toshiba Corp Coil for electric device and manufacture thereof
JPS56116605A (en) * 1980-02-20 1981-09-12 Mitsubishi Electric Corp Resin mold type induction motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5615011A (en) * 1979-07-18 1981-02-13 Toshiba Corp Coil for electric device and manufacture thereof
JPS56116605A (en) * 1980-02-20 1981-09-12 Mitsubishi Electric Corp Resin mold type induction motor

Also Published As

Publication number Publication date
JPS60254604A (en) 1985-12-16

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