JPS63169010A - Foil wound transformer - Google Patents
Foil wound transformerInfo
- Publication number
- JPS63169010A JPS63169010A JP4087A JP4087A JPS63169010A JP S63169010 A JPS63169010 A JP S63169010A JP 4087 A JP4087 A JP 4087A JP 4087 A JP4087 A JP 4087A JP S63169010 A JPS63169010 A JP S63169010A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- electric field
- foil
- neutral point
- electrostatic
- 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 description 2
- 238000004804 winding Methods 0.000 claims abstract description 69
- 230000005684 electric field Effects 0.000 claims abstract description 26
- 230000007935 neutral effect Effects 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 230000000116 mitigating effect Effects 0.000 claims description 4
- 238000009413 insulation Methods 0.000 description 6
- 239000012212 insulator Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 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とを重ねて巻いた巻
線を用いた箔巻変圧器に係り、特に巻線端部における電
界を緩和した箔巻変圧器に関するものである。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a foil-wound transformer using a winding formed by overlapping a metal sheet and an insulating sheet. The present invention relates to a foil-wound transformer that alleviates the electric field in the area.
（従来の技術）
箔巻変圧器は、巻線の占積率が良く小型、軽口化ができ
る特徴がある。既に数ＫＶ、数１００ＫＶＡ程度の比較
的電圧の低い小容量の変圧器では実用化されている。近
年、その優れた長所に鑑み、より高電圧、大言最の例え
ば２７５ＫＶ、３００ＭＶＡ級変圧器への適用拡大が研
究されているが、最大の鍵はいかに冷却能力を向上させ
、高い絶縁能力を巻線に持たセられるかということと、
順路事故時の半径方向機械力に対して耐えさせ得るかに
かかっている。(Prior Art) A foil-wound transformer has a good winding space factor and can be made smaller and lighter in weight. It has already been put to practical use in small capacity transformers with relatively low voltages of several KV and several hundred KVA. In recent years, in view of its excellent advantages, research has been conducted to expand its application to higher voltage, for example 275KV, 300MVA class transformers, but the biggest key is how to improve cooling capacity and achieve high insulation capacity. Whether it can be held by the winding,
It all depends on whether it can withstand the radial mechanical force in the event of a road accident.
第３図に、この様な箔巻変圧器の巻線構成図を示した。FIG. 3 shows a diagram of the winding configuration of such a foil-wound transformer.
即ち、鉄心１に金属シート２と絶縁シート３を巻回して
低圧巻線４と高圧巻線５とか形成され、これらの巻線４
．５は絶縁筒６によってヨーク鉄心７等の接地物に対し
絶縁状態で支持され、絶縁媒体８が封入されたタンク９
内に収納されている。That is, a metal sheet 2 and an insulating sheet 3 are wound around an iron core 1 to form a low voltage winding 4 and a high voltage winding 5.
．． Reference numeral 5 denotes a tank 9 that is supported in an insulated state with respect to a grounded object such as a yoke core 7 by an insulating cylinder 6, and in which an insulating medium 8 is sealed.
It is stored inside.
ところで、上記の保な箔巻変圧器は、薄い金属シート２
と絶縁シート３を重ねて巻回することにより、低圧巻線
４や高圧巻線５が形成される為、鉄心窓内の巻線占積率
が高くなる反面、次の様な問題点が必る。By the way, the above-mentioned thin foil-wound transformer uses a thin metal sheet 2
Since the low voltage winding 4 and the high voltage winding 5 are formed by overlapping and winding the insulating sheet 3, the winding space factor within the core window increases, but the following problems arise. Ru.
即ち、上述した様な数ＫＶ、数ＫＶＡ程度の箔巻変圧器
においては、比較的低電圧、少谷但であるため、巻線の
半径も小さく、スタック高さも低くて良いため、巻線の
重量が低くなり、第３図に示した様に、絶縁筒６に金属
シート２と絶縁シート３とを巻回した際の巻付力によっ
て、充分巻線の自重を支持することができる。従って、
絶縁筒６を、ヨーク鉄心７必るいはヨーク鉄心７に固定
されたシールド１０に固定することによって、巻、腺を
支持することができる。In other words, in foil-wound transformers of several KV or several KVA as described above, the voltage is relatively low and the voltage is low, so the radius of the winding is small and the stack height can be low, so the winding The weight is reduced, and as shown in FIG. 3, the winding force when the metal sheet 2 and the insulating sheet 3 are wound around the insulating cylinder 6 can sufficiently support the weight of the winding. Therefore,
By fixing the insulating cylinder 6 to the yoke core 7 or the shield 10 fixed to the yoke core 7, the coils and glands can be supported.
しかしなから、より高電圧、大言但の箔巻変圧器におい
ては、巻線の自重が大幅に増大するので、絶縁筒６への
巻線の巻付力だけでは巻線を支えることは困難となり、
巻線の変歪及び落下等をきたすおそれがあった。そのた
め、第４図に示した様に、低圧巻線４及び高圧巻線５を
ヨーク鉄心７及びシールド１０に対して支持絶縁物１１
によって絶縁状態で支持する必要があった。また、巻線
を完全に支持するためには、前記支持絶縁物１１を巻線
の半径方向の全面にわたって配設する必要がめった。However, in higher voltage, high-voltage foil-wound transformers, the dead weight of the windings increases significantly, so it is difficult to support the windings with just the force of wrapping the windings around the insulating tube 6. Then,
There was a risk that the windings would become distorted and fall. Therefore, as shown in FIG.
Therefore, it was necessary to support it in an insulated state. Furthermore, in order to completely support the winding, it is necessary to dispose the support insulator 11 over the entire surface of the winding in the radial direction.
また、巻線の端部には、一般に電界緩和用の静電シール
ド１２．１３が配設されている。これらの静電シールド
１２．１３のうち、巻線の高圧線路端側に配設される静
電シールド１２は高圧巻線５の外周部に設ければ良いの
で、その取付は作業は比較的容易であり、また、巻線と
変圧器タンク９との絶縁距離を確保するこ°とは比較的
容易で必つ Ｉこ。Furthermore, an electrostatic shield 12, 13 for mitigating the electric field is generally provided at the end of the winding. Among these electrostatic shields 12 and 13, the electrostatic shield 12 disposed on the high-voltage line end side of the winding can be installed on the outer periphery of the high-voltage winding 5, so its installation is relatively easy. In addition, it is relatively easy to ensure the insulation distance between the windings and the transformer tank 9.
しかし、巻線の中性点側に設けられる静電シールド１３
は、電界緩和能力を増大させるためにその径Ｒを大きく
すると、低圧巻線４と高圧巻線５との間の主間隙の長さ
ｄも同様に大きくしなければならず、箔巻変圧器が大型
化していた。また、前記静電シールド１３の取付は作業
も、高圧巻線５を巻回してからでは不可能でおり、その
取付は作業及び固定作業が困難なものであった。However, the electrostatic shield 13 provided on the neutral point side of the winding
If the diameter R is increased in order to increase the electric field relaxation ability, the length d of the main gap between the low voltage winding 4 and the high voltage winding 5 must also be increased, and the foil-wound transformer was becoming larger. Furthermore, it is impossible to attach the electrostatic shield 13 after the high-voltage winding 5 has been wound, and the attachment and fixing operations are difficult.
ざらに、巻線端部に配設される支持絶縁物１１の比誘電
率が、タンク内部に封入される絶縁媒体８の比誘電率よ
り大きいため、前記支持絶縁物１１が存在する部分にお
いては、中性点端部に電界が集中し、絶縁破壌を生じる
ことがあった。Roughly speaking, since the relative dielectric constant of the support insulator 11 disposed at the end of the winding is larger than the relative permittivity of the insulating medium 8 sealed inside the tank, in the part where the support insulator 11 is present, , the electric field was concentrated at the end of the neutral point, which could cause insulation breakdown.
（発明が解決しようとする問題点）
上記の様に、従来の箔巻変圧器においては、巻線の中性
点側端部に配設される静電シールドの取付は作業が困難
でおり、中性点側端部に電界の集中が起こり絶縁破壊が
生じていた。(Problems to be Solved by the Invention) As mentioned above, in conventional foil-wound transformers, it is difficult to attach the electrostatic shield placed at the end of the winding on the neutral point side. Electric field concentration occurred at the end on the neutral point side, causing dielectric breakdown.
本発明は以上の欠点を除去するもので、巻線の中性点側
端部にあける静電シールドの取付は作業を簡略化し、絶
縁信頼性か高く数域的強度の唖れた箔す皮圧器を提供す
ることを目的とする。The present invention eliminates the above-mentioned drawbacks, and simplifies the work by attaching an electrostatic shield to the end of the winding on the neutral point side, and improves insulation reliability using a perforated foil sheet with high multi-range strength. The purpose is to provide pressure appliances.
［発明の溝成コ
（間ｍ点を解決するための手段）
不発明の箔巻変圧器は、巻線の中性点側両端部に電界援
用用静電シールドをそれぞれ２個ずつ配設し、２個の静
電シールドのうち１つは巻線の内径佃具他の１つは巻線
のヨーク鉄心側に配設したものでおる。[Invention of Mizonariko (Means for solving the problem of m-points) The uninvented foil-wound transformer has two electrostatic shields for electric field assistance arranged at both ends of the winding on the neutral point side. Of the two electrostatic shields, one is placed on the inner diameter of the winding, and the other is placed on the yoke core side of the winding.
（作用）
不発明の箔巻変圧器においては、巻線の中性点側両端部
に電界緩和用静電シールドをそれぞれ２個配設すること
により、主間隙長を大きくすることなく中性点側端部に
生じる電界を大幅に緩和することが可能となる。(Function) In the uninvented foil-wound transformer, by arranging two electrostatic shields for electric field relaxation at both ends of the winding on the neutral point side, the neutral point can be removed without increasing the main gap length. It becomes possible to significantly reduce the electric field generated at the side edges.
（実施例）
以下、本発明の一実施例を第１図に基づいて、具体的に
説明する。なお、第２図及び第３図に示した従来型と同
一の部材は同一の符号を付し、説明を省略する。(Example) Hereinafter, an example of the present invention will be specifically described based on FIG. 1. Incidentally, the same members as those of the conventional type shown in FIGS. 2 and 3 are given the same reference numerals, and the description thereof will be omitted.
本実施例の構成＊
不実施例において、第１図に示すように、電界緩和用静
電シールド２０が高圧巻線５の中性点側の巻線巻き始め
部上下端に配δ夕されて、巻線と共に巻回され、高圧巻
線５の内径側に設けられている。ざらに、高圧巻線５の
中性点側の巻線の上下ヨーク鉄心側に第２の電界緩和用
静電シールド２１が配設されている。Configuration of this embodiment* In the non-embodiment, as shown in FIG. , are wound together with the winding and are provided on the inner diameter side of the high voltage winding 5. Roughly speaking, a second electrostatic shield 21 for mitigating the electric field is disposed on the upper and lower yoke core sides of the winding on the neutral point side of the high voltage winding 5.
なお、巻線の内径側に設けられる静電シールド２０の厚
さは、主間隙の長さｄを圧迫することのないように薄く
形成されている。Note that the thickness of the electrostatic shield 20 provided on the inner diameter side of the winding is formed thin so as not to compress the length d of the main gap.
本実施例の作用＊
この様に構成された本実施例の箔巻変圧器においては、
中性点近傍の電界を緩和するための静電シールド２０．
２１が巻線上下端の内径側とヨーク鉄心側とにそれぞれ
２個配設されるため、巻線端部待に金属シートエツジの
電界を大きく緩和することができると共に、静電シール
ド自らの電界もただ１個のみを配設する場合に比べ、同
じ大きざのシールドに対し電界の集中がなく、電界を大
ざく緩和でき、巻線の絶縁信頼性が大きく向上する。Effect of this embodiment* In the foil-wound transformer of this embodiment configured in this way,
Electrostatic shield for mitigating the electric field near the neutral point 20.
21 are arranged on the inner diameter side of the upper and lower ends of the winding and on the yoke core side, so the electric field of the metal sheet edge between the ends of the winding can be greatly alleviated, and the electric field of the electrostatic shield itself can also be reduced. Compared to the case where only one shield is provided, there is no concentration of electric field for a shield of the same size, the electric field can be largely relaxed, and the insulation reliability of the winding is greatly improved.
また、巻線の端部の電界を緩和するためには、静電シー
ルドの曲率Ｒを大きくすることと、巻線に極力近付ける
こと、ざらに端部へのかぶざりを大きくすることか必要
で市る。本実施例によると、巻線の主間隙の長ざｄを大
ぎくすることなく、厚さの薄い静電シールド２０により
巻線中性点端部の電界を緩和し、さらに第２の静電シー
ルド２１により金属シートエツジへのかぶざりが大きく
なるため、巻線端部の電界がざらに緩和される。この様
に２個の静電シールドを配設することにより、１個のみ
の静電シールドでは曲率Ｒを大きくして主間隙長ｄを圧
迫し、大きくせざるを得なくなること、また特殊な形状
として製作工数を増加させることなどが防止できる。In addition, in order to alleviate the electric field at the ends of the windings, it is necessary to increase the curvature R of the electrostatic shield, place it as close to the windings as possible, and generally increase the coverage of the ends. City. According to this embodiment, the electric field at the neutral point end of the winding is relaxed by the thin electrostatic shield 20 without greatly increasing the length d of the main gap of the winding, and the second electrostatic Since the shield 21 increases the coverage of the metal sheet edge, the electric field at the end of the winding is roughly relaxed. By arranging two electrostatic shields in this way, if only one electrostatic shield is used, the curvature R will be increased and the main gap length d will be compressed. This can prevent an increase in the number of manufacturing steps.
また、高圧巻線５を巻回した後でも第２の静電シールド
２１は取付けることができ、取付は作業が大幅に簡略化
される。Furthermore, the second electrostatic shield 21 can be attached even after the high voltage winding 5 has been wound, and the attachment work is greatly simplified.
＊他の実施例＊
第２図に示すように、第２の静電シールド２１が、高圧
巻線５を形成する絶縁シート３のうち、中性点側に巻回
される絶縁シート３ａの幅を高圧線路端側に巻回される
絶縁シート３ｂに比べて短くし、その間に巻回される金
属シート２端部から絶縁シート３ａ、３ｂ喘部までの長
ざＬｌ、１２をＬｌ ＜１２となるように構成する。*Other Examples* As shown in FIG. 2, the second electrostatic shield 21 has a width of the insulating sheet 3a wound on the neutral point side of the insulating sheets 3 forming the high voltage winding 5. is shorter than the insulating sheet 3b wound around the end of the high-voltage line, and the length Ll, 12 from the end of the metal sheet 2 wound between them to the end of the insulating sheets 3a, 3b, is Ll < 12. Configure it so that
そして、幅を短くした絶縁シート３ａによって、その絶
縁シートの上下端部に形成されるスペースに静電シール
ド２１を配設し、この静電シールド２１を絶縁シート３
ａの端部と支持絶縁物１１によって固定することができ
る。Then, an electrostatic shield 21 is arranged in the space formed at the upper and lower ends of the insulating sheet 3a with a shortened width, and this electrostatic shield 21 is attached to the insulating sheet 3a.
It can be fixed by the end of a and the support insulator 11.
あるいは、巻線端部に機械的強度を高めるために設ける
金属シート２とほぼ同じ厚さで長ざＬ２の絶縁物つめも
の３Ｃを、中性点側で数ターン取除いて、第２の静電シ
ールドの厚みの違いを吸収するか、または中性点側数タ
ーンにわたり、つめもの３Ｃの厚みを薄くしてもよい。Alternatively, an insulating material 3C with a length L2 and approximately the same thickness as the metal sheet 2 provided at the end of the winding to increase mechanical strength is removed from the neutral point side, and a second static It is also possible to absorb the difference in the thickness of the electric shield, or to reduce the thickness of the clasp 3C over several turns on the neutral point side.
さらに、高圧巻線の中性点側に巻回される幅を小ざくし
た絶縁シート３ａの端部と支持絶縁物１１とによって、
静電シールド２１を挟持して支持すれば、特別な支持部
材が不要となり、その機械的強度も溺れたものとなる。Furthermore, by the supporting insulator 11 and the end of the insulating sheet 3a with a reduced width wound around the neutral point side of the high voltage winding,
If the electrostatic shield 21 is held and supported, no special support member is required, and its mechanical strength is also improved.
［発明の構成］
以上の通り本発明によれば、巻線の中性点側に２個の静
電シールドを１個は巻線内径側に、他の１個はヨーク鉄
心側に配設するという簡単な手段により、巻線の中性点
端部における電界を大幅に緩和し、絶縁信頼性が高く、
機械的強度の優れた箔巻変圧器を容易に提供することが
可能である。[Structure of the Invention] As described above, according to the present invention, two electrostatic shields are provided on the neutral point side of the winding, one on the inner diameter side of the winding and the other on the yoke core side. By this simple method, the electric field at the neutral point end of the winding can be greatly alleviated, and insulation reliability is high.
It is possible to easily provide a foil-wound transformer with excellent mechanical strength.
第１図は本発明の一実施例の箔巻変圧器を示す断面図、
第２図は本発明の箔巻変圧器の他の実施例を示す断面図
、第３図及び第４図は従来の箔巻変圧器の構成を示す断
面図である。
１・・・鉄心、２・・・金属シート、３・・・絶縁シー
ト、４・・・低圧巻線、５・・・高圧巻線、６・・・絶
縁筒、７・・・ヨーク鉄心、８・・・絶縁媒体、９・・
・タンク、１０・・・シールド、１１・・・支持絶縁物
、１２．１３・・・静電シールド、２０・・・静電シー
ルド、２１・・・静電シ−ルド。FIG. 1 is a sectional view showing a foil-wound transformer according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view showing another embodiment of the foil-wound transformer of the present invention, and FIGS. 3 and 4 are cross-sectional views showing the structure of a conventional foil-wound transformer. DESCRIPTION OF SYMBOLS 1... Iron core, 2... Metal sheet, 3... Insulating sheet, 4... Low voltage winding, 5... High voltage winding, 6... Insulating cylinder, 7... Yoke iron core, 8... Insulating medium, 9...
- Tank, 10... Shield, 11... Support insulator, 12.13... Electrostatic shield, 20... Electrostatic shield, 21... Electrostatic shield.
Claims (4)
せて巻回して成る箔巻変圧器を、絶縁媒体を封入したタ
ンク内に収容して成る箔巻変圧器において、巻線の中性
点側両端部にそれぞれ２個の電界緩和用静電シールドを
設け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 wrapped around the main leg of an iron core, and the foil-wound transformer is housed in a tank filled with an insulating medium, the inside of the winding is A foil-wound transformer characterized in that two electrostatic shields for mitigating electric fields are provided at each end on the gender side.
内径側、他の１個は巻線の変圧器ヨーク側である特許請
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 two electrostatic shields are installed on the inner diameter side of the winding and the other one on the transformer yoke side of the winding. .
の絶縁シートの幅より他の部分に巻回する絶縁シートの
幅を広くし、中性点上下側に形成したスペースに少なく
とも１個ずつ収納配設してなる特許請求の範囲第１項記
載の箔巻変圧器。(3) The electrostatic shield on the yoke side has the width of the insulating sheet wound around other parts wider than the width of the insulating sheet at the upper and lower ends of the neutral point side, and at least The foil-wound transformer according to claim 1, wherein the foil-wound transformer is arranged one by one.
のみ設けた絶縁物つめものによって支持して成る特許請
求の範囲第１項記載の箔巻変圧器。(4) The foil-wound transformer according to claim 1, wherein the electrostatic shield is supported by insulating tabs provided only at both ends or the lower end of the metal sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4087A JPS63169010A (en) | 1987-01-05 | 1987-01-05 | Foil wound transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4087A JPS63169010A (en) | 1987-01-05 | 1987-01-05 | Foil wound transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63169010A true JPS63169010A (en) | 1988-07-13 |
Family
ID=11463201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4087A Pending JPS63169010A (en) | 1987-01-05 | 1987-01-05 | Foil wound transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63169010A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003061740A (en) * | 2001-08-22 | 2003-03-04 | Shinohara:Kk | Gear for squeezing coating brush in mascara container |
| US8926206B2 (en) | 2009-04-30 | 2015-01-06 | Yoshino Kogyosho Co., Ltd. | Applicator-equipped container |
-
1987
- 1987-01-05 JP JP4087A patent/JPS63169010A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003061740A (en) * | 2001-08-22 | 2003-03-04 | Shinohara:Kk | Gear for squeezing coating brush in mascara container |
| US8926206B2 (en) | 2009-04-30 | 2015-01-06 | Yoshino Kogyosho Co., Ltd. | Applicator-equipped container |
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