JPS63278212A - Foil wound transformer - Google Patents
Foil wound transformerInfo
- Publication number
- JPS63278212A JPS63278212A JP2800287A JP2800287A JPS63278212A JP S63278212 A JPS63278212 A JP S63278212A JP 2800287 A JP2800287 A JP 2800287A JP 2800287 A JP2800287 A JP 2800287A JP S63278212 A JPS63278212 A JP S63278212A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- cooling panel
- foil
- potential
- capacitance
- 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
- 239000011888 foil Substances 0.000 title claims description 4
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 238000004804 winding Methods 0.000 claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 9
- 239000003507 refrigerant Substances 0.000 description 7
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 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
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Landscapes
- Insulating Of Coils (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
である。[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. It is.
（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重ねて巻回
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) A foil-wound transformer, which has a foil winding formed by overlapping metal sheets and insulating sheets around the core leg, has a good space factor for the winding conductor, so it can be used instead of ordinary rectangular wire. It has the characteristics of being smaller and lighter than transformers using shaped conductors.
しかし、より高電圧・大容恒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せ、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 transformers with higher voltage and larger 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号公報が知られている。この変圧器は、例えば第２
図に示すように、鉄心脚１の同曲に金属シート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
No. 13 is known. This transformer is, for example, a second
As shown in the figure, a metal sheet 2 and an insulating sheet 3 are overlapped and wound around the same curve of an iron core leg 1 to form a winding. This winding consists of a low voltage winding 4 and a high voltage winding 5, and 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、絶縁パイプ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 collection pipe 10 maintains the same earth potential as the tank 8 etc., the connection between the metal sheet 2 and the cooling panel 6 having the same potential is made through the insulating pipe 11.
It is done through.
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、ダ°ンク８内
に封入された絶縁用の例えば六フッ化イオウ（Ｓ Ｆａ
ガス）等の絶縁ガスによってなされる。Furthermore, since the cooling panel 6 is wrapped 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 provided within the dunk 8. For example, sulfur hexafluoride (S Fa
gas) or other insulating gas.
以上説明した箔巻変圧器は、冷却のための冷媒が流れる
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. 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、一般に冷却パネル６はステンレス等の金属板
でてきているため、非常に大きな剛性があり、シート巻
線と完全に密着せず、内側すなわち絶縁シート３側にギ
ャップｄができる場合がある。また、冷却パネル６は、
２枚の金属板を冷媒の流れる隙間を取って溶接して製作
されているため、表面に溶接による凹凸ができ、溶接部
分と巻線との密着が悪くなる欠点があった。(Problems to be Solved by the Invention) By the way, since the cooling panel 6 is generally made of a metal plate such as stainless steel, it has very high rigidity and does not come into complete contact with the sheet winding, so that the inner side, that is, the insulating sheet 3 A gap d may be formed on the side. Moreover, the cooling panel 6 is
Since they are manufactured by welding two metal plates with a gap left for the refrigerant to flow through, the welding creates irregularities on the surface, resulting in poor adhesion between the welded parts and the windings.
上記欠点は次のような場合に問題となる。すなわち、箔
巻変圧器に雷インパルス電圧がかかった時の巻線の初期
電位分布は、各金属シート２間をコンデンサとして見た
キャパシタンス分布によって決ると考えられる。冷却パ
ネル６の絶縁シート３側にギャップｄができると、この
部分のキャパシタンスだけが絶縁シート３の厚さで決る
一般の金属シート２間のキャパシタンスよりも小さくな
り、雷インパルス電圧がかかった時、初期に過大な分担
電圧がかかることになる。これにより、冷却パネル６部
分での絶縁破壊を生じることがあり、箔巻変圧器の絶縁
信頼性を著しく低下させ、より高い電圧階級への箔巻変
圧器の応用を困難にさせていた。The above disadvantages become a problem in the following cases. That is, the initial potential distribution of the winding when a lightning impulse voltage is applied to the foil-wound transformer is considered to be determined by the capacitance distribution when the space between each metal sheet 2 is viewed as a capacitor. When a gap d is created on the insulating sheet 3 side of the cooling panel 6, the capacitance of this part becomes smaller than the capacitance between the general metal sheets 2, which is determined by the thickness of the insulating sheet 3, and when a lightning impulse voltage is applied, An excessively large shared voltage will be applied initially. This may cause dielectric breakdown in the cooling panel 6 portion, significantly reducing the insulation reliability of the foil-wound transformer, making it difficult to apply the foil-wound transformer to higher voltage classes.
本発明の目的は、上記のような従来の箔巻変圧器の欠点
を解決し、雷インパルスに対する電位分布を均等化する
ことにより、絶縁信頼性が高く、より高い電圧階級にま
で応用可能な箔巻変圧器を提供することにある。The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional foil-wound transformer, and to create a foil-wound transformer that has high insulation reliability and can be applied to higher voltage classes by equalizing the potential distribution for lightning impulses. Our purpose is to provide winding transformers.
［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、冷却パネルに内接する絶縁シー
トの表面に、電位シールドシートを密着させ、この電位
シールドシートを介して冷却パネルの内側と絶縁シート
が接するようにしたものである。[Structure of the Invention] (Means for Solving the Problems) The foil-wound transformer of the present invention has a potential shield sheet in close contact with the surface of an insulating sheet inscribed in a cooling panel, and cooling is carried out through the potential shield sheet. The inside of the panel is in contact with the insulation sheet.
（作用）
電位シールドシートを冷却パネルの内側と絶縁シートと
の間に設けたことにより、冷却パネルと冷却パネルの内
側の金属シート間のキャパシタンスは、電位シールドシ
ートと金属シート間のキャパシタンスとなり、雷インパ
ルス電圧による電位分布が均等化されるのでおる。(Function) By providing the potential shield sheet between the inside of the cooling panel and the insulating sheet, the capacitance between the cooling panel and the metal sheet inside the cooling panel becomes the capacitance between the potential shield sheet and the metal sheet, and lightning This is because the potential distribution due to the impulse voltage is equalized.
（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.
＊実施例の構成＊
第１図において、冷却パネル６の内側に接して配設され
ている絶縁シート３の表面に、電位シールドシート２１
が密着され、この電位シールドシート２１を介して冷却
パネル６の内側と絶縁シー＝ ６−
ト３が接し、外側には従来と同様金属シート２が接する
ようにして巻線内に巻き込まれている。*Configuration of the embodiment* In FIG.
are in close contact with each other, and the inside of the cooling panel 6 is in contact with the insulating sheet 3 via this potential shield sheet 21, and the metal sheet 2 is in contact with the outside as in the conventional case, and is wound into the winding. .
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の内側にギャップｄができたとしても、冷却パ
ネル６と冷却パネル６の内側の金属シート２間のキャパ
シタンスは、電位シールド′ シート２１と金属シート
２間のキャパシタンスとなり、絶縁シート３の厚さで決
る一般の金属シート２間のキャパシタンスに等しくなる
。従って、雷インパルス電圧に対する電位分布が均等に
なり、絶縁耐力を向上させることができる。Effects of this embodiment * In the foil-wound transformer of this embodiment configured as described above, even if a gap d is formed inside the cooling panel 6, there is no gap between the cooling panel 6 and the metal sheet 2 inside the cooling panel 6. The capacitance is the capacitance between the potential shield sheet 21 and the metal sheet 2, and is equal to the general capacitance between the metal sheets 2, which is determined by the thickness of the insulating sheet 3. Therefore, the potential distribution with respect to the lightning impulse voltage becomes uniform, and the dielectric strength can be improved.
本実施例の効果＊
このように冷却パネル６に内接して巻回されている絶縁
シート３の表面に、電位シールドシート２１を密着させ
たことにより、冷却パネル６の絶縁シート３側にできる
ギャップｄの部分に分担電圧がかからず、雷インパルス
電圧に対する電位分布が均等になり、絶縁信頼性の向上
を計ることができる。Effects of this embodiment* By bringing the potential shield sheet 21 into close contact with the surface of the insulating sheet 3 that is inscribed and wound around the cooling panel 6, a gap is created on the insulating sheet 3 side of the cooling panel 6. Since no shared voltage is applied to the portion d, the potential distribution with respect to the lightning impulse voltage becomes uniform, and insulation reliability can be improved.
なお、前記電位シールドシート２１は、導電性シートで
あれば材質は問わない。例えば、巻線用の金属シートを
電位シールドシートとして用いてもよい。Note that the potential shield sheet 21 may be made of any material as long as it is a conductive sheet. For example, a metal sheet for winding may be used as the potential shield sheet.
［発明の効果］
以上の通り本発明によれば、冷却パネルに内接して巻回
されている絶縁シートの表面に、電位シールドシートを
密着させて巻き込んだことにより、冷却パネルと冷却パ
ネルの内側の金属シート間のキャパシタンスは、電位シ
ールドシートと金属シート間のキャパシタンスとなり、
雷インパルス電圧に対する電位分布が均等化でき、絶縁
信頼性の向上が計れ、より高い電圧階級にまで応用可能
な箔巻変圧器を提供できる。[Effects of the Invention] As described above, according to the present invention, the potential shielding sheet is closely wrapped around the surface of the insulating sheet that is inscribed and wound around the cooling panel, so that the cooling panel and the inside of the cooling panel are The capacitance between the metal sheets is the capacitance between the potential shield sheet and the metal sheet,
It is possible to equalize the potential distribution with respect to lightning impulse voltage, improve insulation reliability, and provide a foil-wound transformer that can be applied to higher voltage classes.
第１図は本発明の箔巻変圧器の一実施例を示す冷却パネ
ル部分の拡大断面図、第２図は従来の箔巻変圧器の構造
を示す断面図、第３図は第２図の冷却パネル部分の構造
を示す斜示図、第４図は第３の冷却パネル部分の拡大断
面図である。
頓 −８−
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、１ｏ・・・集液管、１１・・・絶縁パイプ、
２１・・・電位シールドシート、ｄ・・・ギャップ。Fig. 1 is an enlarged sectional view of a cooling panel portion showing one embodiment of the foil-wound transformer of the present invention, Fig. 2 is a sectional view showing the structure of a conventional foil-wound transformer, and Fig. 3 is the same as that of Fig. 2. A perspective view showing the structure of the cooling panel portion, and FIG. 4 is an enlarged sectional view of the third cooling panel portion. -8- 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, 1o...Liquid collection pipe, 11...Insulated pipe,
21... Potential shield sheet, d... Gap.
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、冷却パネルに内
接する絶縁シートの表面に、電位シールドシートを密着
させて巻き込んだ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 wound overlappingly around the legs of an iron core to form a foil winding, and a cooling panel is placed inside this foil winding, the cooling panel is A foil-wound transformer characterized by a potential shielding sheet tightly wrapped around the surface of an inscribed insulating sheet.
る特許請求の範囲第１項記載の箔巻変圧器。(2) The foil-wound transformer according to claim 1, wherein the potential shield sheet is a foil-shaped metal sheet for winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2800287A JPS63278212A (en) | 1987-02-12 | 1987-02-12 | Foil wound transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2800287A JPS63278212A (en) | 1987-02-12 | 1987-02-12 | Foil wound transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63278212A true JPS63278212A (en) | 1988-11-15 |
Family
ID=12236590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2800287A Pending JPS63278212A (en) | 1987-02-12 | 1987-02-12 | Foil wound transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63278212A (en) |
-
1987
- 1987-02-12 JP JP2800287A patent/JPS63278212A/en active Pending
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