JPH07142265A - Winding component with ferrite core, its manufacture, core cover for winding component and core with cover for winding component - Google Patents
Winding component with ferrite core, its manufacture, core cover for winding component and core with cover for winding componentInfo
- Publication number
- JPH07142265A JPH07142265A JP30608393A JP30608393A JPH07142265A JP H07142265 A JPH07142265 A JP H07142265A JP 30608393 A JP30608393 A JP 30608393A JP 30608393 A JP30608393 A JP 30608393A JP H07142265 A JPH07142265 A JP H07142265A
- Authority
- JP
- Japan
- Prior art keywords
- core
- winding
- cover
- ferrite core
- resin
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、含浸注型された樹脂に
よる絶縁体を外側に有するフェライトコア付巻線部品、
この巻線部品の製造方法、巻線部品用コアカバー及び巻
線部品用カバー付コアに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding part with a ferrite core, which has an insulator made of impregnated and cast resin outside
The present invention relates to a winding component manufacturing method, a winding component core cover, and a winding component cover-equipped core.
【０００２】[0002]
【従来の技術】トランス、リアクトル等の巻線部品のう
ち、特に高電圧を発生する例えば放電ランプ点灯装置用
のトリガトランス等の巻線部品においては、絶縁を保証
するために、含浸性が高く絶縁特性の優れたエポキシ等
の樹脂で巻線部品全体を含浸注型する必要がある。2. Description of the Related Art Among winding parts such as transformers and reactors, particularly winding parts such as a trigger transformer for a discharge lamp lighting device, which generate a high voltage, have a high impregnation property in order to ensure insulation. It is necessary to impregnate and cast the entire winding component with a resin such as epoxy, which has excellent insulation properties.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、フェラ
イトコアを含む巻線部品をエポキシ等の樹脂で含浸注型
しようとすると、温度変化による樹脂の膨張及び収縮に
よって生じる応力でフェライトコアにクラックが発生し
てしまう。クラックが発生すると磁気特性が当然のこと
ながら悪化し、このクラックが樹脂内にまで及ぶ場合に
は絶縁性が大幅に損なわれてしまう。However, when a winding part including a ferrite core is attempted to be impregnated and cast with a resin such as epoxy, cracks occur in the ferrite core due to stress caused by expansion and contraction of the resin due to temperature change. Will end up. When cracks occur, the magnetic properties naturally deteriorate, and when the cracks extend into the resin, the insulation properties are significantly impaired.
【０００４】このようなクラック発生を防ぐために、巻
線部品をコアごと含浸注型せず、コアを除いた部分のみ
含浸注型しその後にコアを取り付けることも考えられる
が、この場合、ボビン構造が複雑となるため、製造コス
トが上昇してしまう。In order to prevent such cracks from occurring, it is conceivable to impregnate and cast the winding parts together with the core, and to impregnate and cast only the part excluding the core and then attach the core. In this case, the bobbin structure is used. However, the manufacturing cost is increased because the manufacturing process becomes complicated.
【０００５】従って本発明は、製造コストをさほど上昇
させることなく、フェライトコアを含む巻線部品を樹脂
によって含浸注型する際のコア割れを防止したフェライ
トコア付巻線部品、その製造方法、巻線部品用コアカバ
ー及び巻線部品用カバー付コアを提供するものである。Accordingly, the present invention provides a winding component with a ferrite core, which prevents core cracking when a winding component including a ferrite core is impregnated with a resin and cast, without significantly increasing the manufacturing cost. The present invention provides a core cover for wire components and a core with a cover for winding components.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、フェラ
イトコアと、フェライトコアのほぼ全表面に被着された
低硬度かつ高弾力性の樹脂によるカバーと、被着された
カバーの上からフェライトコアに装着された巻線と、フ
ェライトコアを含めて装着された巻線上から含浸注型さ
れた樹脂による絶縁体とを備えたフェライトコア付巻線
部品が提供される。According to the present invention, a ferrite core, a cover made of a low-hardness and high-elasticity resin that is adhered to almost the entire surface of the ferrite core, and Provided is a winding component with a ferrite core, which includes a winding attached to a ferrite core and an insulator made of a resin impregnated and cast from above the winding including the ferrite core.
【０００７】本発明によれば、さらに、フェライトコア
のほぼ全表面にあらかじめ成形されている低硬度かつ高
弾力性の樹脂によるカバーを被着し、被着されたカバー
の上からフェライトコアに巻線を装着し、装着された巻
線上から樹脂を含浸注型するフェライトコア付巻線部品
の製造方法が提供される。According to the present invention, a cover made of a resin having a low hardness and a high elasticity, which has been formed in advance, is attached to almost the entire surface of the ferrite core, and the ferrite core is wound on the attached cover. Provided is a method of manufacturing a winding component with a ferrite core, in which a wire is mounted and a resin is impregnated and cast from the mounted winding.
【０００８】本発明によれば、さらにまた、フェライト
コアと低硬度かつ高弾力性の樹脂によるカバーとを同時
成型してこのカバーをフェライトコアのほぼ全表面に被
着し、被着されたカバーの上からフェライトコアに巻線
を装着し、装着された巻線上から樹脂を含浸注型するフ
ェライトコア付巻線部品の製造方法が提供される。According to the present invention, a ferrite core and a cover made of a resin having a low hardness and a high elasticity are simultaneously molded, and the cover is adhered to almost the entire surface of the ferrite core. A method of manufacturing a winding component with a ferrite core, in which a winding is mounted on a ferrite core from above and a resin is impregnated and cast from above the mounted winding is provided.
【０００９】さらに、本発明によれば、フェライトコア
上に巻線が装着され装着された巻線上から樹脂が含浸注
型される巻線部品用のコアカバーは、フェライトコアの
ほぼ全表面に被着可能なように低硬度かつ高弾力性の樹
脂によって成型されている。Further, according to the present invention, a core cover for a winding component, in which a winding is mounted on a ferrite core and a resin is impregnated and cast from the mounted winding, a substantially whole surface of the ferrite core is covered. It is molded with low hardness and high elasticity resin so that it can be worn.
【００１０】さらにまた、本発明によれば、巻線がその
上から装着され装着された巻線上から樹脂が含浸注型さ
れる巻線部品用カバー付コアは、フェライトコアと、こ
のフェライトコアのほぼ全表面に被着された低硬度かつ
高弾力性の樹脂によるカバーとを備えている。Furthermore, according to the present invention, a core with a cover for a winding component, in which a winding is mounted from above, and a resin is impregnated and cast from above the mounted winding, is a ferrite core, and a core of this ferrite core. And a cover made of a resin having a low hardness and a high elasticity, which is attached to almost the entire surface.
【００１１】[0011]
【作用】フェライトコアの内外に含浸注型された樹脂の
熱膨張、収縮によって発生する応力は、そのコアのほぼ
全表面にわたって被着された低硬度かつ高弾力性の樹脂
によるカバーにより吸収される。従って、フェライトコ
アを含む巻線部品を樹脂によって含浸注型しても、コア
及び樹脂にクラックが発生することはなく良好な絶縁特
性を有する巻線部品を得ることができる。また、このよ
うに巻線部品をコアごと含浸注型した絶縁体を形成する
ことにより、コアの磁歪によって発生する振動音、電流
や磁界の変化によって巻線や層間紙が発生する振動音を
効果的に抑圧したり、弱めたりすることができる。[Function] The stress generated by the thermal expansion and contraction of the resin impregnated and cast into the inside and outside of the ferrite core is absorbed by the cover made of the low hardness and high elasticity resin applied over almost the entire surface of the core. . Therefore, even if a winding component including a ferrite core is impregnated and cast with a resin, a crack is not generated in the core and the resin, and a winding component having good insulation characteristics can be obtained. In addition, by forming an insulator by impregnating the winding components together with the core in this way, the vibration noise generated by the magnetostriction of the core and the vibration noise generated by the winding and the interlayer paper due to changes in the current and magnetic field are effective. Can be suppressed or weakened.
【００１２】[0012]
【実施例】以下図面を用いて本発明の実施例を詳細に説
明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
【００１３】図２は本発明のフェライトコア付巻線部品
の一実施例として放電ランプ点灯装置用のトリガトラン
スの全体構成を概略的に示す斜視図であり、図１はＡＡ
線を含む面で図２を切断した断面図である。FIG. 2 is a perspective view schematically showing the entire structure of a trigger transformer for a discharge lamp lighting device as an embodiment of a winding component with a ferrite core according to the present invention. FIG.
It is sectional drawing which cut | disconnected FIG. 2 by the surface containing a line.
【００１４】これらの図において、１０はフェライトコ
ア、１１はフェライトコア１０の回りにそのほぼ全表面
にわたって被着された薄い樹脂製のカバーをそれぞれ示
している。カバー１１は、例えばシリコン樹脂又はウレ
タン樹脂等の低硬度かつ高弾力性の樹脂によって形成さ
れている。カバー１１を介してコア１０の上にはボビン
１２が装着されており、このボビン１２には巻線１３が
層間紙１４を各層間に設けて巻回されている。巻線１３
の両端は端子１５に接続されている。フェライトコア１
０の外側にはエポキシ樹脂を含浸注型することによる絶
縁体１６が形成されており、さらにフェライトコア１０
の内側の巻線１３及び層間紙１４部分にもエポキシ樹脂
の含浸注型により絶縁体１６が充填されている。In these figures, 10 is a ferrite core, and 11 is a cover made of a thin resin which is attached around the ferrite core 10 over substantially the entire surface thereof. The cover 11 is formed of a resin having low hardness and high elasticity such as silicon resin or urethane resin. A bobbin 12 is mounted on the core 10 via a cover 11, and a winding 13 is wound around the bobbin 12 with an interlayer paper 14 provided between the layers. Winding 13
Both ends of are connected to the terminal 15. Ferrite core 1
On the outside of 0, an insulator 16 is formed by impregnating and casting with epoxy resin.
Insulation 16 is also filled in the winding 13 and the inter-layer paper 14 on the inner side by the impregnation casting of epoxy resin.
【００１５】図３は、図２の実施例のトランスに用いる
フェライトコアにおいてカバーを取り付ける工程を説明
する斜視図である。FIG. 3 is a perspective view illustrating a step of attaching a cover in the ferrite core used in the transformer of the embodiment shown in FIG.
【００１６】まず、同図（Ａ）に示すごとく、焼結され
た半ピースのフェライトコア３０を用意する。一方、同
図（Ｂ）に示すごとく、この半ピースのフェライトコア
３０の外面形状に対応する形状を有する薄いカバー３１
を形成しておく。このカバー３１は、例えばシリコン樹
脂又はウレタン樹脂等の低硬度かつ高弾力性の樹脂を成
形することにより得られる。カバー３１の厚さは、コア
の寸法や樹脂の硬度等によっても異なるが、例えばＥＥ
Ｒ２８Ｌのコアの表面に硬度（ＪＩＳＡ）３０、伸び４
８０％のシリコン加硫樹脂を取り付ける場合、約０．４
〜０．５ｍｍ程度である。なお、カバー３１において、
コア前面に対応する部分３１ａ、３１ｂ及び３１ｃは、
本実施例では開口されている。First, as shown in FIG. 1A, a sintered half-piece ferrite core 30 is prepared. On the other hand, as shown in FIG. 2B, a thin cover 31 having a shape corresponding to the outer surface shape of the half-piece ferrite core 30.
Is formed. The cover 31 is obtained by molding a resin having low hardness and high elasticity such as silicon resin or urethane resin. The thickness of the cover 31 varies depending on the dimensions of the core, the hardness of the resin, etc.
R28L core surface has hardness (JIS A) 30, elongation 4
When installing 80% silicone vulcanized resin, about 0.4
It is about 0.5 mm. In the cover 31,
The portions 31a, 31b and 31c corresponding to the front surface of the core are
In this embodiment, it is opened.
【００１７】次いで、このカバー３１をコア３０の上か
ら被せ、同図（Ｂ）に示す３１ｄの部分を１８０°折り
曲げてコア３０の背面を覆うことにより、同図（Ｃ）に
示すごとき半ピースのカバー付コアが形成される。２つ
のこのような半ピースのカバー付コアの前面を互いに対
向する形となるようにボビン１２が取り付けられる。こ
のボビン１２には、あらかじめ巻線１３及び層間紙１４
が巻付けられている。端子１５にはこの巻線の両端が接
続される。このように形成したコア及び巻線全体に対し
てエポキシ樹脂を含浸注型することによって最終的なト
ランスが製造される。コアに対する巻線の装着方法は上
述の例に限定されない。例えば、ボビンをカバー付コア
に装着した後、巻線を巻回してもよいし、ボビンを用い
ることなくカバー付コアに巻線を直接的に装着してもよ
い。Next, the cover 31 is covered from above the core 30, and the portion 31d shown in FIG. 3B is bent 180 degrees to cover the back surface of the core 30 so that the half piece as shown in FIG. A core with a cover is formed. The bobbin 12 is mounted so that the front faces of two such half-piece covered cores face each other. The bobbin 12 has a winding 13 and an interlayer paper 14 in advance.
Is wrapped around. Both ends of this winding are connected to the terminal 15. A final transformer is manufactured by impregnating and casting an epoxy resin on the entire core and winding thus formed. The method of mounting the winding on the core is not limited to the above example. For example, the winding may be wound after mounting the bobbin on the core with cover, or the winding may be directly mounted on the core with cover without using the bobbin.
【００１８】このように本実施例によれば、フェライト
コア１０の内外に含浸注型される際の樹脂の熱膨張、収
縮によって発生する応力がよるカバー１１により吸収さ
れるので、コア及び樹脂にクラックが発生することはな
く良好な磁気特性及び絶縁特性を有するトランスを得る
ことができる。しかも製造コストをさほど上昇させるこ
ともない。また、コアを含めて樹脂で含浸注型すること
によって、ボビン構造が簡単となりしかもコアの磁歪に
よって発生する振動音や、電流や磁界の変化によって巻
線、層間紙が発生する振動音を効果的に抑圧することが
できる。特に、本実施例のごとく低周波駆動されるトリ
ガトランスではこの振動音の抑圧が非常に効果的であ
る。As described above, according to the present embodiment, the stress generated by the thermal expansion and contraction of the resin when impregnated into the inside and outside of the ferrite core 10 is absorbed by the cover 11, so that the core and the resin are absorbed. It is possible to obtain a transformer having good magnetic characteristics and insulating characteristics without cracking. Moreover, the manufacturing cost is not increased so much. Also, by impregnating and casting resin including the core, the bobbin structure is simplified, and vibration noise generated by magnetostriction of the core and vibration noise generated by windings and interlayer paper due to changes in current and magnetic field are effective. Can be suppressed. Particularly, in the trigger transformer driven at a low frequency as in the present embodiment, the suppression of this vibration sound is very effective.
【００１９】上述の実施例では、フェライトコアとカバ
ーとを別個に形成した後、合体させているが、カバーが
フェライトコアのほぼ全表面に被着するようにこれらを
同時成型してもよいことは明らかである。また、上述の
実施例はトリガトランスの場合であるが、本発明は、フ
ェライトコアを有するいかなるトランス又はリアクトル
等の巻線部品についても適用することができる。In the above-mentioned embodiment, the ferrite core and the cover are separately formed and then combined, but they may be simultaneously molded so that the cover is adhered to almost the entire surface of the ferrite core. Is clear. Further, although the above-mentioned embodiment is the case of the trigger transformer, the present invention can be applied to any transformer having a ferrite core or a winding component such as a reactor.
【００２０】以上述べた実施例は全て本発明を例示的に
示すものであって限定的に示すものではなく、本発明は
他の種々の変形態様及び変更態様で実施することができ
る。従って本発明の範囲は特許請求の範囲及びその均等
範囲によってのみ規定されるものである。The embodiments described above are merely illustrative and not limitative of the present invention, and the present invention can be implemented in various other modified modes and modified modes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.
【００２１】[0021]
【発明の効果】以上詳細に説明したように本発明によれ
ば、フェライトコアの内外に含浸注型された樹脂の熱膨
張、収縮によって発生する応力が、そのコアのほぼ全表
面にわたって被着された低硬度かつ高弾力性の樹脂によ
るカバーにより吸収される。従って、フェライトコアを
含む巻線部品全体を樹脂によって含浸注型しても、コア
及び樹脂にクラックが発生することはなく良好な磁気特
性及び絶縁特性を有する巻線部品を得ることができる。
しかも製造コストをさほど上昇させることもない。ま
た、このように巻線部品をコアごと含浸注型した絶縁体
を形成することにより、コアの磁歪によって発生する振
動音、電流や磁界の変化によって巻線や層間紙が発生す
る振動音を効果的に抑圧することができる。As described in detail above, according to the present invention, the stress generated by the thermal expansion and contraction of the resin impregnated and cast inside and outside the ferrite core is applied to almost the entire surface of the core. It is absorbed by the cover made of low hardness and high elasticity resin. Therefore, even if the entire winding component including the ferrite core is impregnated and cast with a resin, cracks are not generated in the core and the resin, and a winding component having good magnetic characteristics and insulation characteristics can be obtained.
Moreover, the manufacturing cost is not increased so much. In addition, by forming an insulator by impregnating the winding components together with the core in this way, the vibration noise generated by the magnetostriction of the core and the vibration noise generated by the winding and the interlayer paper due to changes in the current and magnetic field are effective. Can be suppressed.
【図１】図２に関してＡＡ線を含む面で切断した断面図
である。FIG. 1 is a cross-sectional view taken along a plane including line AA with respect to FIG.
【図２】本発明のフェライトコア付巻線部品の一実施例
の全体構成を概略的に示す斜視図である。FIG. 2 is a perspective view schematically showing the overall configuration of an embodiment of a winding component with a ferrite core according to the present invention.
【図３】図２の実施例に用いるフェライトコアにおいて
カバーを取り付ける工程を説明する斜視図である。FIG. 3 is a perspective view illustrating a step of attaching a cover in the ferrite core used in the embodiment of FIG.
１０ フェライトコア １１ カバー １２ ボビン １３ 巻線 １４ 層間紙 １６ 絶縁体 10 Ferrite Core 11 Cover 12 Bobbin 13 Winding 14 Interlayer Paper 16 Insulator
Claims (5)
ほぼ全表面に被着された低硬度かつ高弾力性の樹脂によ
るカバーと、該被着されたカバーの上から該フェライト
コアに装着された巻線と、前記フェライトコアを含めて
該装着された巻線上から含浸注型された樹脂による絶縁
体とを備えたことを特徴とするフェライトコア付巻線部
品。1. A ferrite core, a cover made of a resin having a low hardness and a high elasticity, which is attached to substantially the entire surface of the ferrite core, and a winding which is attached to the ferrite core from above the attached cover. A winding component with a ferrite core, comprising: a wire; and an insulator made of a resin impregnated and cast from above the mounted winding including the ferrite core.
め成形されている低硬度かつ高弾力性の樹脂によるカバ
ーを被着し、該被着されたカバーの上から該フェライト
コアに巻線を装着し、該装着された巻線上から樹脂を含
浸注型することを特徴とするフェライトコア付巻線部品
の製造方法。2. A cover made of a resin having a low hardness and a high elasticity, which is preformed on almost the entire surface of the ferrite core, is adhered, and the winding is attached to the ferrite core from above the adhered cover. A method for manufacturing a winding component with a ferrite core, characterized in that resin is impregnated and cast from above the mounted winding.
樹脂によるカバーとを同時成型して該カバーを前記フェ
ライトコアのほぼ全表面に被着し、該被着されたカバー
の上から該フェライトコアに巻線を装着し、該装着され
た巻線上から樹脂を含浸注型することを特徴とするフェ
ライトコア付巻線部品の製造方法。3. A ferrite core and a cover made of a resin having a low hardness and a high elasticity are simultaneously molded, and the cover is adhered to almost the entire surface of the ferrite core, and the ferrite is applied from above the adhered cover. A method of manufacturing a winding component with a ferrite core, comprising mounting a winding wire on a core, and impregnating and casting a resin on the mounted winding wire.
着された巻線上から樹脂が含浸注型される巻線部品用の
コアカバーであって、フェライトコアのほぼ全表面に被
着可能なように低硬度かつ高弾力性の樹脂によって成型
されていることを特徴とする巻線部品用コアカバー。4. A core cover for a winding component, in which a winding is mounted on a ferrite core, and a resin is impregnated and cast from the mounted winding, which can be adhered to almost the entire surface of the ferrite core. As described above, the core cover for winding parts is characterized by being molded from a resin having low hardness and high elasticity.
巻線上から樹脂が含浸注型される巻線部品用カバー付コ
アであって、フェライトコアと、該フェライトコアのほ
ぼ全表面に被着された低硬度かつ高弾力性の樹脂による
カバーとを備えていることを特徴とする巻線部品用カバ
ー付コア。5. A core with a cover for a winding component, wherein a winding is mounted from above, and a resin is impregnated and cast from above the mounted winding, wherein the ferrite core and substantially the entire surface of the ferrite core are provided. A core with a cover for a winding component, comprising: a cover made of a low-hardness and high-elasticity resin attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30608393A JPH07142265A (en) | 1993-11-12 | 1993-11-12 | Winding component with ferrite core, its manufacture, core cover for winding component and core with cover for winding component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30608393A JPH07142265A (en) | 1993-11-12 | 1993-11-12 | Winding component with ferrite core, its manufacture, core cover for winding component and core with cover for winding component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07142265A true JPH07142265A (en) | 1995-06-02 |
Family
ID=17952830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30608393A Withdrawn JPH07142265A (en) | 1993-11-12 | 1993-11-12 | Winding component with ferrite core, its manufacture, core cover for winding component and core with cover for winding component |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07142265A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5805431A (en) * | 1996-01-17 | 1998-09-08 | Synergy Microwave Corporation | Surface Mountable transformer |
| JP2002164229A (en) * | 2000-11-29 | 2002-06-07 | Tokin Corp | Stress-relief transformer and its manufacturing method |
| WO2014115667A1 (en) * | 2013-01-28 | 2014-07-31 | 住友電気工業株式会社 | Reactor, converter, and electric-power conversion device |
| WO2016135949A1 (en) * | 2015-02-27 | 2016-09-01 | 株式会社 東芝 | Inductor and wireless power transmission device |
-
1993
- 1993-11-12 JP JP30608393A patent/JPH07142265A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5805431A (en) * | 1996-01-17 | 1998-09-08 | Synergy Microwave Corporation | Surface Mountable transformer |
| JP2002164229A (en) * | 2000-11-29 | 2002-06-07 | Tokin Corp | Stress-relief transformer and its manufacturing method |
| WO2014115667A1 (en) * | 2013-01-28 | 2014-07-31 | 住友電気工業株式会社 | Reactor, converter, and electric-power conversion device |
| JP2014146656A (en) * | 2013-01-28 | 2014-08-14 | Sumitomo Electric Ind Ltd | Reactor, converter and power conversion device |
| CN104969314A (en) * | 2013-01-28 | 2015-10-07 | 住友电气工业株式会社 | Reactor, converter, and electric-power conversion device |
| US9440542B2 (en) | 2013-01-28 | 2016-09-13 | Sumitomo Electric Industries, Ltd. | Reactor, converter, and power conversion device |
| WO2016135949A1 (en) * | 2015-02-27 | 2016-09-01 | 株式会社 東芝 | Inductor and wireless power transmission device |
| JPWO2016135949A1 (en) * | 2015-02-27 | 2017-04-27 | 株式会社東芝 | Inductor and wireless power transmission device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6525636B1 (en) | Stick-type ignition coil having improved structure against crack or dielectric discharge | |
| JP2007081085A (en) | Ignition coil for internal combustion engines | |
| JPH10331753A (en) | Ignition device | |
| WO2005045858A1 (en) | Coil device | |
| US20040010908A1 (en) | Method for manufacturing a coil winding assembly of a concentrated winding motor | |
| JP7101804B2 (en) | Ignition coil | |
| JPH07142265A (en) | Winding component with ferrite core, its manufacture, core cover for winding component and core with cover for winding component | |
| JP2002164229A (en) | Stress-relief transformer and its manufacturing method | |
| KR100795572B1 (en) | Pole transformer and a method for manufacture thereof | |
| JP3953667B2 (en) | Ignition coil | |
| JP2001196234A (en) | Amorphous iron core molding transformer and manufacturing method therefor | |
| KR200432586Y1 (en) | Pole transformer | |
| JP7199250B2 (en) | Mold transformer and mold transformer manufacturing method | |
| JPH05135967A (en) | Transformer | |
| JPH08339928A (en) | Ignition coil for internal combustion engine | |
| JP2003178925A (en) | Ignition coil for internal combustion engine | |
| JP4926370B2 (en) | Ignition coil for internal combustion engine | |
| JP2930273B2 (en) | Manufacturing method for windings of electromagnetic induction equipment | |
| JP2005183995A (en) | Ignition coil used for otto engine and method of manufacturing ignition coil | |
| JP2000049024A (en) | Ignition coil for internal combustion engine and its manufacture | |
| JP2003124042A (en) | Ignition coil | |
| JPH10112413A (en) | Ignition coil | |
| JP2002359128A (en) | Ignition coil for internal combustion engine | |
| JP3626132B2 (en) | Ignition coil for internal combustion engine | |
| JPH08181022A (en) | Transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010130 |