JPH03145708A - Resin-molded coil - Google Patents
Resin-molded coilInfo
- Publication number
- JPH03145708A JPH03145708A JP28292189A JP28292189A JPH03145708A JP H03145708 A JPH03145708 A JP H03145708A JP 28292189 A JP28292189 A JP 28292189A JP 28292189 A JP28292189 A JP 28292189A JP H03145708 A JPH03145708 A JP H03145708A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- resin
- insulating resin
- cylindrical body
- flange
- 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.)
- Pending
Links
- 229920005989 resin Polymers 0.000 claims abstract description 39
- 239000011347 resin Substances 0.000 claims abstract description 39
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 5
- 239000003566 sealing material Substances 0.000 claims abstract 3
- 230000002745 absorbent Effects 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 239000003822 epoxy resin Substances 0.000 abstract description 6
- 229920000647 polyepoxide Polymers 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 229920002379 silicone rubber Polymers 0.000 abstract description 3
- 239000004945 silicone rubber Substances 0.000 abstract description 3
- 238000004299 exfoliation Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 4
- 229920001225 polyester resin Polymers 0.000 description 4
- 239000004645 polyester resin Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000004590 silicone sealant Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［発明の１−１的］
（産業上の利用分野）
本発明は、筒体のコイル収納部内にコイルを配設し、コ
イル収納部内に絶縁樹脂を注入して構成する樹脂モール
ドコイルに関する。Detailed Description of the Invention [Object 1-1 of the Invention] (Industrial Application Field) The present invention is constructed by disposing a coil in a coil storage part of a cylindrical body and injecting an insulating resin into the coil storage part. The present invention relates to resin molded coils.
（従来の技術）
例えば樹脂モールド変圧器に使用される樹脂モールドコ
イルは、従来、コイルを成形型内に配設し、その後、成
形型内に樹脂を注入して製作されている。(Prior Art) For example, resin molded coils used in resin molded transformers have conventionally been manufactured by placing the coil in a mold and then injecting resin into the mold.
即ち、第２図に示す第１の従来例においては、下部フラ
ンジ部１ａ、内周部１ｂ、上部フランジ部ＩＣ及び外周
部１ｄにより金型１を構成し、この金型１内にスペーサ
２を介して複数の単位コイル３ａ〜３ｆからなるコイル
３を配設する。そして、金型１内にポリエステル樹脂ま
たはエポキシ樹脂等の絶縁樹脂４を注入硬化させた後、
金型１を分解除去して樹脂モールドコイル５を製作して
いる。然しながら、この構成では、樹脂モールドコイル
５を製作する都度、金型１を分解しなければならず、そ
の分解が複雑で作業性が悪いばかりでなく、金型１を分
解した後、金型１に付着した絶縁樹脂４を取除く必要が
あって、その作業が面倒で、コスト高になるという欠点
がある。That is, in the first conventional example shown in FIG. 2, a mold 1 is constituted by a lower flange part 1a, an inner peripheral part 1b, an upper flange part IC, and an outer peripheral part 1d, and a spacer 2 is placed inside this mold 1. A coil 3 consisting of a plurality of unit coils 3a to 3f is disposed through the coil. After injecting and hardening an insulating resin 4 such as polyester resin or epoxy resin into the mold 1,
A resin molded coil 5 is manufactured by disassembling and removing the mold 1. However, with this configuration, the mold 1 must be disassembled each time the resin molded coil 5 is manufactured, and the disassembly is complicated and workability is poor. It is necessary to remove the insulating resin 4 adhering to the insulating resin 4, which is a troublesome work and increases the cost.
そこで、第３図に示す第２の従来例においては、フラン
ジ部６ａを有する内筒６と、フランジ部７ａを有する外
筒７とによってコイル収納部８を有する成形型兼用のプ
ラスチック製の筒体９を構成し、このコイル収納部８内
に前述と同様にスペサ２を介して複数の単位コイル３８
〜３ｆからなるコイル３を配設する。この場合、内筒６
と外筒７との接合部分にはシールか施されている。その
後、図示しない注入口からコイル収納部８内にポリエス
テル樹脂またはエポキシ樹脂等の絶縁樹脂４を注入、硬
化させて樹脂モールドコイル］０を製作している。Therefore, in the second conventional example shown in FIG. 3, a plastic cylinder which also serves as a mold and has a coil storage part 8 is formed by an inner cylinder 6 having a flange part 6a and an outer cylinder 7 having a flange part 7a. 9, and a plurality of unit coils 38 are inserted into this coil storage portion 8 via spacers 2 in the same way as described above.
A coil 3 consisting of ~3f is arranged. In this case, the inner cylinder 6
A seal is applied to the joint between the outer cylinder 7 and the outer cylinder 7. Thereafter, an insulating resin 4 such as polyester resin or epoxy resin is injected into the coil storage part 8 through an injection port (not shown) and hardened to produce a resin molded coil]0.
（発明が解決しようとする課題）
上述した樹脂モールドコイル１０は、筒体９がそのまま
製品として使用され、口つ、その製作後に第１の従来例
の如き金型］を分解する必要がないので作業性がよく、
また絶縁樹脂４を取除く作業も必要がない笠、多くの利
点を有している。(Problems to be Solved by the Invention) In the resin molded coil 10 described above, the cylindrical body 9 can be used as a product as it is, and there is no need to disassemble the mold as in the first conventional example after its manufacture. Good workability,
Furthermore, the hat does not require any work to remove the insulating resin 4, and has many advantages.
然しながら、絶縁樹脂４の硬化時に、絶縁樹脂４と筒体
９との境界面において両者の熱膨張係数の違いによる収
縮差が生して剥離１１が発生することがある。この剥離
１１が発生すると、変圧器の運転中にコロナ放電が発生
し、絶縁破壊を起こす虞がある。However, when the insulating resin 4 is cured, a difference in shrinkage occurs at the interface between the insulating resin 4 and the cylinder 9 due to the difference in coefficient of thermal expansion between the two, and peeling 11 may occur. If this peeling 11 occurs, corona discharge may occur during operation of the transformer, which may cause dielectric breakdown.
本発明は、上記の事情に鑑みてなされたもので、その目
的は、プラスチック製の筒体と絶縁樹脂との境界面にお
いて剥離が発生ずることを防止し得る樹脂モールドコイ
ルを提供するにある。The present invention has been made in view of the above circumstances, and its object is to provide a resin molded coil that can prevent peeling from occurring at the interface between a plastic cylinder and an insulating resin.
［発明の構成］
（課題を解決するための手段）
本発明の樹脂モールドコイルは、プラスチック製の内筒
及び外筒からなり両者間にコイル収納部を形成した筒体
を設け、この筒体のコイル収納部の内周面にシリコーン
シール材よりなる吸収層を形成し、前記コイル収納部内
にその周囲との間に間隔を存するようにコイルを配設し
た後、前記筒体のコイル収納部内に絶縁樹脂を注入して
構成したところに特徴を有する。[Structure of the Invention] (Means for Solving the Problems) The resin molded coil of the present invention includes a cylindrical body consisting of an inner tube and an outer tube made of plastic, with a coil storage section formed between the two, and After forming an absorbing layer made of a silicone sealant on the inner circumferential surface of the coil accommodating part and arranging the coil in the coil accommodating part so as to leave a space between it and the periphery thereof, the coil is placed in the coil accommodating part of the cylindrical body. It is unique in that it is constructed by injecting insulating resin.
（作用）
本発明の樹脂モールドコイルは、シリコーンシール利よ
りなる吸収層が、筒体のコイル収納部の内周面に強力に
接着し、且つ注入された絶縁樹脂とも強力に接着するの
で、絶縁樹脂の収縮時に剥離か発生しない。(Function) In the resin molded coil of the present invention, the absorption layer made of silicone seal strongly adheres to the inner circumferential surface of the coil housing portion of the cylindrical body, and also strongly adheres to the insulating resin injected. No peeling occurs when the resin contracts.
（実施例）
以下本発明を樹脂モールド変圧器の樹脂モールドコイル
に適用した一実施例につき第１図を参照して説明する。(Example) An example in which the present invention is applied to a resin molded coil of a resin molded transformer will be described below with reference to FIG.
成形型兼用の筒体２１は、ＩＩ′ｉＴれもプラスチック
例えばポリエステル樹脂またはエポキシ樹脂から形成さ
れた内筒２２と外筒２３とから構成されている。内筒２
２にはその下端部から外方に向けてフランジ部２２ａが
形成されており、また外筒２３にはその上端部から内方
に向けてフランジ部２３ａが形成されていて、これらに
よってコイル収納部２４が形成されている。コイル収納
部２４の内周面にはシリコーンシール祠例えば耐熱性。The cylindrical body 21, which also serves as a mold, is composed of an inner cylinder 22 and an outer cylinder 23, both of which are made of plastic, such as polyester resin or epoxy resin. Inner cylinder 2
2 has a flange portion 22a formed outward from its lower end, and a flange portion 23a is formed inward from its upper end on the outer cylinder 23, and these provide a coil storage area. 24 is formed. The inner peripheral surface of the coil storage portion 24 is provided with a silicone seal, for example, heat-resistant.
弾力性に優れ強い接着力を有するシリコーンゴムが０．
５〜２ｍｍの厚さに塗布されて吸収層２５が形成されて
いる。この場合、コイル収納部２４の内周面の表面を予
め凹凸状に加工しておくと、吸収層２５との間の接着力
が更に大きくなる。コイル２６は複数の単位コイル２６
ａ〜２６ｆから構成されている。このコイル２６をコイ
ル収納部２４内に配置する手順について説明すると、先
ず、内筒２２に沿ってそのフランジ部２２ａ上に吸収層
２５を介してスペーサ２７を配置し、このスペーサ２７
の上に単位コイル２６ａを載せる。つぎに、単位コイル
２６ａの上にスペーサ２７を配置し、このスペーサ２７
の上に単位コイル２６ｂを載せる。このようにして順次
スペーサ２７．単位コイル２６ｃ〜２６ｆを配置し、単
位コイル２６ｆの上にスペーサ２７を配置すると、単位
コイル２６ａ〜２６ｆが軸方向に間隔を存して配設され
る。そして、単位コイル２６ａ〜２６ｆの周囲及び単位
コイル２６ｆの上部に内面に吸収層２５を形成した外筒
２３及びそのフランジ部２３ａを配置する。そして、コ
イル収納部２４内に図示しない注入口からポリエステル
樹脂またはエポキシ樹脂等の絶縁樹脂２８を注入して硬
化させる。これにより、樹脂モールドコイル２９が構成
される。Silicone rubber with excellent elasticity and strong adhesive strength is 0.
The absorbent layer 25 is formed by coating to a thickness of 5 to 2 mm. In this case, if the surface of the inner peripheral surface of the coil storage portion 24 is processed to have an uneven shape in advance, the adhesive force between the coil storage portion 24 and the absorbent layer 25 will be further increased. The coil 26 includes a plurality of unit coils 26
It is composed of a to 26f. To explain the procedure for arranging this coil 26 in the coil storage part 24, first, a spacer 27 is arranged along the inner cylinder 22 on the flange part 22a with the absorbing layer 25 interposed therebetween.
The unit coil 26a is placed on top of the unit coil 26a. Next, a spacer 27 is placed on the unit coil 26a, and this spacer 27
Place the unit coil 26b on top of the unit coil 26b. In this way, the spacers 27. When the unit coils 26c to 26f are arranged and the spacer 27 is arranged on the unit coil 26f, the unit coils 26a to 26f are arranged at intervals in the axial direction. Then, the outer cylinder 23 having the absorbing layer 25 formed on its inner surface and its flange portion 23a are arranged around the unit coils 26a to 26f and above the unit coil 26f. Then, an insulating resin 28 such as polyester resin or epoxy resin is injected into the coil storage portion 24 from an injection port (not shown) and hardened. Thereby, the resin molded coil 29 is constructed.
斯様な構成の上記実施例は、コイル収納部２４の内周面
にシリコーンゴム材からなる吸収層２５を形成したので
、コイル収納部２４内に注入した樹脂２８が硬化する過
程において、筒体２１と絶縁樹脂２８との境界面におい
て両者の熱膨張係数の違いによる収縮差が生じても、弾
性を有する吸収層２５が筒体２１と絶縁樹脂２８と強力
に接着しており両者の変位を吸収するようになり、これ
らの境界面に剥離は生じない。従って、従来とは異なり
、剥離１１に起因するコロナ放電も発生しないので、絶
縁破壊を起こす虞がなく、品質及び信頼性を向上させ得
る。In the above-mentioned embodiment having such a configuration, the absorption layer 25 made of silicone rubber material is formed on the inner circumferential surface of the coil storage portion 24, so that in the process of curing the resin 28 injected into the coil storage portion 24, the cylindrical body Even if a shrinkage difference occurs at the interface between the cylindrical body 21 and the insulating resin 28 due to the difference in coefficient of thermal expansion between the two, the elastic absorbing layer 25 is strongly bonded to the cylindrical body 21 and the insulating resin 28, preventing displacement of the two. It becomes absorbed and no peeling occurs at these interfaces. Therefore, unlike in the past, corona discharge due to peeling 11 does not occur, so there is no risk of dielectric breakdown, and quality and reliability can be improved.
特に、上記実施例によれば、吸収層２５が、内筒２２と
外筒２３との接合部分をシールするので、従来、樹脂４
を注入するに際して、内筒６と外筒７との接合部分をシ
ールしていた作業が同時に行われることになるという効
果を奏する。In particular, according to the above embodiment, since the absorbent layer 25 seals the joint portion between the inner cylinder 22 and the outer cylinder 23, conventional resin 4
This has the effect that the work of sealing the joint between the inner tube 6 and the outer tube 7 is performed at the same time when injecting the liquid.
［発明の効果〕
以上の説明から明らかなように本発明の樹脂モールドコ
イルは、プラスチック製の内筒及び外筒からなる筒体の
内周面にシリコーンシール拐よりなる吸収層を形成した
ので、筒体と絶縁樹脂の境界面において剥離が発生する
ことを防止し得て、絶縁破壊を起こす虞がなく、品質及
び信頼性を向上させ得るという効果を奏する。[Effects of the Invention] As is clear from the above description, the resin molded coil of the present invention has an absorbent layer made of silicone sealant formed on the inner circumferential surface of the cylindrical body consisting of an inner cylinder and an outer cylinder made of plastic. This has the effect that peeling can be prevented from occurring at the interface between the cylinder and the insulating resin, there is no risk of dielectric breakdown, and quality and reliability can be improved.
第１図は本発明の一実施例を示す縦断面図であり、第２
図は第１の従来例の第１図相当図、第３図は第２の従来
例の第１図相当図である。
図中、２］は筒体、２２は内筒、２３は外筒、２４はコ
イル収納部、２５は吸収層、２６はコイル、２６ａ〜２
６ｆは単位コイル、２８は絶縁樹脂、２９は樹脂モール
ドコイルを示す。FIG. 1 is a vertical sectional view showing one embodiment of the present invention, and FIG.
The figure is a diagram corresponding to FIG. 1 of a first conventional example, and FIG. 3 is a diagram corresponding to FIG. 1 of a second conventional example. In the figure, 2] is a cylinder, 22 is an inner cylinder, 23 is an outer cylinder, 24 is a coil storage part, 25 is an absorption layer, 26 is a coil, and 26a to 2
6f indicates a unit coil, 28 indicates an insulating resin, and 29 indicates a resin molded coil.
Claims (1)
イル収納部を形成した筒体と、この筒体のコイル収納部
の内周面に形成されたシリコーンシール材よりなる吸収
層と、前記コイル収納部内にその周囲との間に間隔を存
するように配設されたコイルとを具備し、前記筒体のコ
イル収納部内に絶縁樹脂を注入して構成された樹脂モー
ルドコイル。1. A cylindrical body consisting of an inner cylinder and an outer cylinder made of plastic and having a coil storage section therebetween; an absorbent layer made of a silicone sealing material formed on the inner circumferential surface of the coil storage section of this cylindrical body; and the coil storage section. A resin-molded coil comprising a coil disposed within the coil so as to be spaced from the periphery of the coil, the resin-molded coil being constructed by injecting an insulating resin into the coil housing portion of the cylindrical body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28292189A JPH03145708A (en) | 1989-11-01 | 1989-11-01 | Resin-molded coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28292189A JPH03145708A (en) | 1989-11-01 | 1989-11-01 | Resin-molded coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03145708A true JPH03145708A (en) | 1991-06-20 |
Family
ID=17658837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28292189A Pending JPH03145708A (en) | 1989-11-01 | 1989-11-01 | Resin-molded coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03145708A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007157987A (en) * | 2005-12-05 | 2007-06-21 | Aichi Electric Co Ltd | Transformer winding |
| JP2009026951A (en) * | 2007-07-19 | 2009-02-05 | Mitsubishi Electric Corp | Molded coil |
-
1989
- 1989-11-01 JP JP28292189A patent/JPH03145708A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007157987A (en) * | 2005-12-05 | 2007-06-21 | Aichi Electric Co Ltd | Transformer winding |
| JP2009026951A (en) * | 2007-07-19 | 2009-02-05 | Mitsubishi Electric Corp | Molded coil |
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