JPS63216312A - Foil-wound transformer - Google Patents
Foil-wound transformerInfo
- Publication number
- JPS63216312A JPS63216312A JP4872587A JP4872587A JPS63216312A JP S63216312 A JPS63216312 A JP S63216312A JP 4872587 A JP4872587 A JP 4872587A JP 4872587 A JP4872587 A JP 4872587A JP S63216312 A JPS63216312 A JP S63216312A
- Authority
- JP
- Japan
- Prior art keywords
- cooling panel
- insulating sheet
- foil
- contact
- sheet
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims description 24
- 239000011888 foil Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 2
- 239000003507 refrigerant Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- FYJQJMIEZVMYSD-UHFFFAOYSA-N perfluoro-2-butyltetrahydrofuran Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C1(F)OC(F)(F)C(F)(F)C1(F)F FYJQJMIEZVMYSD-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Landscapes
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、金属シートと絶縁シートを重ねて巻回した巻
線内に、冷却ダクトを内蔵した箔巻変圧器に関するもの
でおる。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a foil-wound transformer in which a cooling duct is built into a winding formed by overlapping metal sheets and insulating sheets. I'll go.
（従来の技術）
鉄心脚の周囲に金属シートと絶縁シートとを単ねて巻回
して箔状巻線を構成した箔巻変圧器は、巻線導体の占積
率が良いので、通常の平角線状の導体を用いた変圧器と
比較して小形・軽量化に適した特徴を有している。(Prior art) Foil-wound transformers, in which a foil winding is constructed by winding a metal sheet and an insulating sheet around a core leg, have a good space factor for the winding conductor, so Compared to transformers using linear conductors, it has the advantage of being smaller and lighter.
しかし、より高電圧・人寄■の変圧器を実現させるため
には、巻線に対する冷却能率を更に向上さけ、かつ高い
絶縁能力を巻線に持たせることが不可欠となっており、
このため巻線内に冷媒の流通する冷却パネルを内蔵させ
、巻線から発生する熱を直接的に冷却するように構成す
ることが考えられている。However, in order to realize a transformer with higher voltage and higher capacity, it is essential to further improve the cooling efficiency of the windings and provide the windings with high insulation capacity.
For this reason, it has been considered to incorporate a cooling panel in which a refrigerant flows within the winding to directly cool the heat generated from the winding.
この種の変圧器としては、例えば特開昭５４−１６８６
１３号公報が１口られている。この変圧器は、例えば第
２図に示すように、鉄心脚１の周囲に金属シート２と絶
縁シート３とを重ねて巻回して巻線を構成したものであ
る。この巻線は、低圧巻線４と高圧巻線５とからなり、
これらの各巻線内には環状の冷却パネル６が内蔵されて
いる。As this type of transformer, for example, Japanese Patent Application Laid-Open No. 54-1686
One copy of Publication No. 13 has been published. In this transformer, for example, as shown in FIG. 2, a metal sheet 2 and an insulating sheet 3 are layered and wound around a core leg 1 to form a winding. This winding consists of a low voltage winding 4 and a high voltage winding 5,
An annular cooling panel 6 is built in each of these windings.
冷却パネル６は、冷媒が流れるための狭い隙間を取って
重ねた２枚の金属板の周辺が溶接等で封じられたもので
ある。この冷却パネル６の隙間に、フロンＲ−１１３や
フロリナートＦＣ−７５等の冷媒をポンプ７で常時流し
込み、冷媒に箔巻巻線内で発生した熱を奪い取らせるこ
とで冷却が行なわれている。熱を吸収した冷媒は、巻線
外部へ送り出され、タンク８外部に設けた冷却器９内で
冷却され再度冷却パネル６内へ送り込まれる。なお、冷
媒は、冷却パネル６に送り込まれる前に一旦果液管１０
に集められるが、この集液管１０はタンク８等と同電位
のアース電位を保持しているため、金属シート２と同電
位を有する冷却パネル６との接続は’ｉｌ！ｊ縁パイプ
１１を介して行なわれている。The cooling panel 6 is made of two metal plates stacked one on top of the other with a narrow gap for the coolant to flow, and the periphery of the two metal plates is sealed by welding or the like. Cooling is performed by constantly flowing a refrigerant such as Freon R-113 or Fluorinert FC-75 into the gap between the cooling panels 6 using a pump 7, and allowing the refrigerant to remove the heat generated within the foil-wound windings. The refrigerant that has absorbed the heat is sent out to the outside of the winding, cooled in a cooler 9 provided outside the tank 8, and sent into the cooling panel 6 again. Note that the refrigerant is once passed through the fruit juice pipe 10 before being sent to the cooling panel 6.
However, since this liquid collection pipe 10 holds the same ground potential as the tank 8, etc., the connection between the metal sheet 2 and the cooling panel 6, which has the same potential, is 'il!'. This is done via the edge pipe 11.
冷却パネル６は、金属シート２を熱伝導により冷却し、
同時に冷却パネル６の電位を取るために、第３図、第４
図に示すように冷却パネル６の外側が金属シート２と接
し、内側が絶縁シート３と接するよう巻回されている。The cooling panel 6 cools the metal sheet 2 by thermal conduction,
At the same time, in order to obtain the potential of the cooling panel 6,
As shown in the figure, the cooling panel 6 is wound so that the outside is in contact with the metal sheet 2 and the inside is in contact with the insulating sheet 3.
更に、冷却パネル６が巻線内に巻き込まれている関係上
、冷却パネル６にもほぼ同電位が印加され、この金属シ
ート２や冷却パネル６と外部との絶縁は、タンク８内に
封入された絶縁用の例えば六フッ化イオウ（ＳＦ６ガス
）等の絶縁ガスによってなされる。Furthermore, since the cooling panel 6 is wound around the winding, almost the same potential is applied to the cooling panel 6, and insulation between the metal sheet 2 and the cooling panel 6 and the outside is sealed in the tank 8. This is done using an insulating gas such as sulfur hexafluoride (SF6 gas).
以上説明した箔巻変圧器は、冷却のための冷媒か流れる
循環回路と絶縁ガスとが完全に分離されていることから
、セパレート式箔巻変圧器と呼ばれており、従来の平角
線状の導体を用いた変圧器に比較し、大幅な小形・軽量
化が可能で、絶縁信頼性が高い等の利点を有している。The foil-wound transformer described above is called a separate foil-wound transformer because the circulation circuit through which the refrigerant for cooling flows and the insulating gas are completely separated, and it is called a separate foil-wound transformer. Compared to transformers using conductors, they have the advantage of being significantly smaller and lighter, and have higher insulation reliability.
（発明が解決しようとする問題点）
ところで、冷却パネル６は第３図に示すように、２枚の
金属板が冷媒の流れる隙間をとって溶接し、製作されて
いるため、表面に溶接による凹凸ができ、絶縁シート３
側で巻線との密着が悪くなり、ギャップｄができる。こ
のような冷却パネル６表面での凹凸は、冷却パネル６が
巻線の間に巻き込まれた時に絶縁シート３やこの絶縁シ
ート３と接している金属シート２に部分的に強く接する
ため、機械的なストレスがかかり、金属シート２ヤ絶縁
シート３が損傷する恐れがあり、機械的信頼性か箸しく
低下した。更に、冷却パネル６の凹凸部分に金属粉など
の異物が入り込み、付着し、巻線内に入ることがあった
。このような金属粉などの異物の付着部９分では、絶縁
耐力が低下し、冷却パネル６部分での絶縁破壊を生じる
危惧があった。(Problems to be Solved by the Invention) By the way, as shown in FIG. 3, the cooling panel 6 is manufactured by welding two metal plates with a gap through which the refrigerant flows. Irregularities occur and the insulation sheet 3
The adhesion with the winding becomes poor on the side, creating a gap d. Such unevenness on the surface of the cooling panel 6 is caused by strong contact with the insulating sheet 3 and the metal sheet 2 that is in contact with the insulating sheet 3 when the cooling panel 6 is wound between the windings, resulting in mechanical damage. There was a risk that the metal sheet 2 and the insulating sheet 3 would be damaged, and the mechanical reliability would be significantly reduced. Furthermore, foreign matter such as metal powder may enter the uneven portion of the cooling panel 6, adhere to it, and enter the winding. There was a fear that the dielectric strength would decrease in the 9-minute portion where foreign matter such as metal powder was adhered, and dielectric breakdown would occur in the cooling panel 6 portion.
本発明の目的は、パネル表面に生じたギャップｄににす
、絶縁シートや金属シートに生ずる機械的なストレスを
低減し、同時に金属粉など異物を発見し易くし、また異
物が巻線内に入り込むのを防止し、信頼性の高い箔巻変
圧器を提供することにある。The purpose of the present invention is to reduce the mechanical stress that occurs on the insulating sheet or metal sheet in the gap d that occurs on the panel surface, and at the same time, to make it easier to find foreign objects such as metal powder, and to prevent foreign objects from entering the windings. The object of the present invention is to provide a highly reliable foil-wound transformer that prevents the intrusion from occurring.
［発明の構成］
（問題点を解決するための手段）
本発明の箔巻変圧器は、冷却パネルの絶縁シートと接す
る面をコーティング材によりコーティングし、樹脂層を
形成したものである。[Structure of the Invention] (Means for Solving the Problems) In the foil-wound transformer of the present invention, the surface of the cooling panel in contact with the insulating sheet is coated with a coating material to form a resin layer.
（作用）
本発明の箔巻変圧器においては、冷却パネルの絶縁シー
トと接する面をコーティング材によりコーティングして
樹脂層を形成したことにより、冷却パネルの表面の凹凸
を埋め、絶縁シートやこの絶縁シートに接する金属シー
トに加わるは械的ストレスを均一化したことにある。(Function) In the foil-wound transformer of the present invention, by coating the surface of the cooling panel in contact with the insulating sheet with a coating material to form a resin layer, the unevenness on the surface of the cooling panel is filled, and the insulating sheet and this insulating sheet are The purpose of this is to equalize the mechanical stress that is applied to the metal sheet in contact with the sheet.
（実施例）
進んで本発明の箔巻変圧器の一実施例を第１図を用いて
説明する。(Example) Next, an example of the foil-wound transformer of the present invention will be described with reference to FIG.
なお、従来の技術と同一部分については同一符号を付し
て説明を省略する。Note that the same parts as those in the prior art are given the same reference numerals and the description thereof will be omitted.
本実施例の構成＊
第１図において、冷却パネル６の絶縁シート３に接する
面の凹凸表面がコーティング材によってコーティングさ
れ、冷却パネル６の製作時に生じた溶接による凹凸面が
埋め込まれて、滑かな樹脂層２１が形成されている。Configuration of this embodiment * In Figure 1, the uneven surface of the surface of the cooling panel 6 in contact with the insulating sheet 3 is coated with a coating material, and the uneven surface due to welding that occurred when manufacturing the cooling panel 6 is embedded, making it smooth. A resin layer 21 is formed.
本実施例の作用＊
このように構成された本実施例の箔巻変圧器では、冷却
パネル６の表面に樹脂層２１が形成されたことにより、
冷却パネル６の製作時に生じた凹凸面が埋め込まれて、
表面が滑かになっているので、冷却パネル６に接する絶
縁シート３やこの絶縁シート３に接する金属シート２に
加わる機械的ストレスが均一化される。また、冷却パネ
ル６表面が滑かとなるため、金属粉など異物を冷却パネ
ル巻き込み時に除去し易くなっている。更に、コーティ
ング材の色を適当に選ぶことで、異物が発見し易くなる
。Effects of this embodiment* In the foil-wound transformer of this embodiment configured as described above, since the resin layer 21 is formed on the surface of the cooling panel 6,
The uneven surface that occurred during the manufacturing of the cooling panel 6 is embedded,
Since the surface is smooth, the mechanical stress applied to the insulating sheet 3 in contact with the cooling panel 6 and the metal sheet 2 in contact with this insulating sheet 3 is made uniform. Furthermore, since the surface of the cooling panel 6 is smooth, foreign matter such as metal powder can be easily removed when the cooling panel is rolled up. Furthermore, by appropriately selecting the color of the coating material, it becomes easier to detect foreign substances.
なＪ３、樹脂層を絶縁耐力の高い、例えばフッ素樹脂な
どでコーティングした場合、樹脂層により絶縁耐力の向
上した箔巻変圧器の提供が可能である。J3, when the resin layer is coated with a material having high dielectric strength, such as a fluororesin, it is possible to provide a foil-wound transformer with improved dielectric strength due to the resin layer.
［発明の効果］
以−りの通り本発明によれば、冷却パネルの絶縁シート
と接する面をコーティング材によりコーティングし、樹
脂層を形成したことにより、冷却パネル近傍の機械的ス
トレスを低減し、同時に金属粉などの異物の混入を防止
し、機械的信頼性が高く、晶質の向上した箔巻変圧器の
提供が可能である。[Effects of the Invention] As described above, according to the present invention, the surface of the cooling panel in contact with the insulating sheet is coated with a coating material to form a resin layer, thereby reducing mechanical stress in the vicinity of the cooling panel, At the same time, it is possible to provide a foil-wound transformer that prevents contamination of foreign substances such as metal powder, has high mechanical reliability, and has improved crystallinity.
第１図は本発明の箔巻変圧器の冷却パネルの一実施例を
示す拡大断面図、第２図は従来の箔巻変圧器を示す断面
図、第３図は従来の冷却パネルの一部拡大断面図である
。
１・・・鉄心脚、２・・・金属シート、３・・・絶縁シ
ート、４・・・低圧巻線、５・・・高圧巻線、６・・・
冷却パネル、７・・・ポンプ、８・・・タンク、９・・
・冷却器、１０・・・集液管、１１・・・絶縁パイプ、
２１・・・樹脂層、ｄ・・・ギＡノツプ。Fig. 1 is an enlarged sectional view showing an embodiment of the cooling panel of the foil-wound transformer of the present invention, Fig. 2 is a sectional view showing a conventional foil-wound transformer, and Fig. 3 is a part of the conventional cooling panel. It is an enlarged sectional view. DESCRIPTION OF SYMBOLS 1... Iron core leg, 2... Metal sheet, 3... Insulating sheet, 4... Low voltage winding, 5... High voltage winding, 6...
Cooling panel, 7...pump, 8...tank, 9...
・Cooler, 10...Liquid collection pipe, 11...Insulated pipe,
21...Resin layer, d...Gear knob.
Claims (2)
て巻回して、箔状巻線を形成し、この箔状巻線内部に冷
却パネルを配置した箔巻変圧器において、冷却パネルの
絶縁シートと接する面をコーティング材によりコーティ
ングし、樹脂層を形成したことを特徴とする箔巻変圧器
。(1) In a foil-wound transformer in which a metal sheet and an insulating sheet are layered and wound around the legs of an iron core to form a foil winding, and a cooling panel is placed inside this foil winding, a cooling panel is used. A foil-wound transformer characterized in that the surface in contact with the insulating sheet is coated with a coating material to form a resin layer.
囲第１項記載の箔巻変圧器。(2) The foil-wound transformer according to claim 1, wherein the coating material is a fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4872587A JPS63216312A (en) | 1987-03-05 | 1987-03-05 | Foil-wound transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4872587A JPS63216312A (en) | 1987-03-05 | 1987-03-05 | Foil-wound transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63216312A true JPS63216312A (en) | 1988-09-08 |
Family
ID=12811269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4872587A Pending JPS63216312A (en) | 1987-03-05 | 1987-03-05 | Foil-wound transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63216312A (en) |
-
1987
- 1987-03-05 JP JP4872587A patent/JPS63216312A/en active Pending
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