JPS6023491B2 - transformer winding - Google Patents
transformer windingInfo
- Publication number
- JPS6023491B2 JPS6023491B2 JP56178613A JP17861381A JPS6023491B2 JP S6023491 B2 JPS6023491 B2 JP S6023491B2 JP 56178613 A JP56178613 A JP 56178613A JP 17861381 A JP17861381 A JP 17861381A JP S6023491 B2 JPS6023491 B2 JP S6023491B2
- Authority
- JP
- Japan
- Prior art keywords
- shield ring
- support insulator
- transformer winding
- insulator
- liquid rubber
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
- Insulating Of Coils (AREA)
- Regulation Of General Use Transformers (AREA)
Description
【発明の詳細な説明】
本発明は変圧器巻線、特に、シールドリングを含む変圧
器巻線の端部絶縁構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transformer winding, and more particularly to an end insulation structure for a transformer winding including a shield ring.
従来、変圧器巻線の端部は、添付図面第１図に示すよう
に、電界緩和用のシールドリングや支持絶縁物によって
構成されている。Conventionally, the ends of transformer windings have been constructed with shield rings and supporting insulators for mitigating electric fields, as shown in FIG. 1 of the accompanying drawings.
すなわち、図において、符号１はシールドリング、２は
変圧器巻線本体、３はシールドリングーと変圧器巻線本
体２とを支持する支持絶縁物、４はアース部である。こ
のように構成されているシールドリング１は電界緩和効
果を持たせるために、アース部に対向する面の両側端に
適当な曲率の円弧部Ａを形成した構造とされている。こ
のように形成されているシールドリング１は、変圧器巻
線の端部と電気的に接続し、両電位にして巻線端を電気
的にシールドすると共に、それ自身の端部形状を上記の
ように適当な曲率の円弧部Ａに形成することによって、
電界集中の少なし、構造とし、巻線の絶縁強度を高めた
ものであり、また、支持絶縁物３は、このシールドリン
グ１を機械的に支持すると共にシールドリング１とアー
ス部４との絶縁距離を維持する働きをしているものであ
る。That is, in the figure, numeral 1 is a shield ring, 2 is a transformer winding body, 3 is a supporting insulator that supports the shield ring and the transformer winding body 2, and 4 is a grounding portion. The shield ring 1 thus constructed has a structure in which arcuate portions A of appropriate curvature are formed at both ends of the surface facing the ground portion in order to provide an electric field relaxation effect. The shield ring 1 formed in this manner is electrically connected to the end of the transformer winding, electrically shields the winding end at both potentials, and has its own end shape as described above. By forming the arc part A with an appropriate curvature,
It has a structure that reduces electric field concentration and increases the insulation strength of the winding, and the support insulator 3 mechanically supports the shield ring 1 and provides insulation between the shield ring 1 and the ground portion 4. It works to maintain distance.
しかしながら、このように構成されたシールドリング１
と支持絶縁物３との接触部の両側端には、第１図に示す
ように、シールドリングーの円弧部Ａと支持絶縁物３の
端面とによって形成されるくさび状のすきまＢが存在し
ている。However, the shield ring 1 configured in this way
As shown in FIG. 1, there is a wedge-shaped gap B formed by the arc portion A of the shield ring and the end surface of the support insulator 3 at both ends of the contact area between the shield ring and the support insulator 3. ing.
このために、このすきまＢの根元である根元部Ｃ及びそ
の近傍においては、支持絶縁物３とすきまＢの部分にあ
る絶縁媒体との謙露率の違いにより電界がみだされ、局
部的に高い電位頻度となり、絶縁上の弱点となっていた
。そのために、このような構造の場合においては、シー
ルドリング１とアース部４との間の所要絶縁距離が大き
くなり、その結果、機器を大きくして不経済になるとい
う欠点があった。これに対し、第２図に示すように、支
持絶縁物３のシールドリング１に対向する部分をシール
ドリング１の形状に合わせて凹状に形成したものを使用
して、すきまＢをなくすことも考えられるが、この場合
は、支持絶縁物の成形加工に難点があり、経済的とは言
えず、また、シールドリング１の円弧部Ａの表面に多少
の凹凸があるために、シールドリング１と完全にすきま
なく接触させることは難しいという欠点がある。For this reason, at the base C, which is the base of this gap B, and its vicinity, an electric field is generated locally due to the difference in dew rate between the supporting insulator 3 and the insulating medium in the gap B. This resulted in a high potential frequency, which was a weak point in terms of insulation. Therefore, in the case of such a structure, the required insulation distance between the shield ring 1 and the ground portion 4 becomes large, and as a result, there is a drawback that the equipment becomes large and uneconomical. On the other hand, as shown in Fig. 2, it is also possible to eliminate the gap B by using a part of the support insulator 3 that faces the shield ring 1 and is formed into a concave shape to match the shape of the shield ring 1. However, in this case, there are difficulties in molding the support insulator, which is not economical, and since the surface of the arcuate portion A of the shield ring 1 has some irregularities, it is not completely compatible with the shield ring 1. The disadvantage is that it is difficult to make contact with each other without any gaps.
本発明は、上記に示すような従来の変圧器巻線における
欠点を除去し、局部的に電位傾度が高くなることを防止
して、絶縁上の弱点をなくすことを、その目的とするも
のであって、この目的を達成するために、シールドリン
グと支持絶縁物との間の接触部のくさび状のすきまに、
支持絶縁物とほぼ同等の誘導率を有し、処理前は液状で
あって、処理後に硬化する液状絶縁物、例えば、シリコ
ンシーランドのような液状ゴムを充填していることを特
徴とするものである。The purpose of the present invention is to eliminate the drawbacks of conventional transformer windings as described above, prevent local potential gradients from increasing, and eliminate weak points in insulation. To achieve this purpose, a wedge-shaped gap in the contact area between the shield ring and the supporting insulator is
It has a dielectric constant that is almost the same as that of the supporting insulator, is liquid before treatment, and is filled with a liquid insulator that hardens after treatment, for example, a liquid rubber such as silicone sealant. It is.
以下、本発明をその一実施例を示す添付図面に基づいて
説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings showing one embodiment thereof.
第３図において、符号１〜４はそれぞれシールドリング
、変圧器巻線本体、支持絶縁物、アース部であって、第
１図に示した従来のものと同様のものであり、また、符
号５はシールドリングーと支持絶縁物３との間のすきま
Ｂに充填された液状絶縁物、例えば、液状ゴムであって
、液状ゴム５は支持絶縁物３とほぼ同等の謙電率を有し
、且っ、処理前においては液状を呈すると共に処理後に
おいては硬化するシリコンシーラントである。In FIG. 3, numerals 1 to 4 are respectively a shield ring, a transformer winding body, a support insulator, and a grounding part, which are similar to the conventional one shown in FIG. is a liquid insulator, for example, liquid rubber, filled in the gap B between the shield ring and the support insulator 3, and the liquid rubber 5 has almost the same electrical modulus as the support insulator 3, Moreover, it is a silicone sealant that is liquid before treatment and hardens after treatment.
この液状ゴム５の充填方法の一例を参考のため第４図に
よって説明しておく。まず、第４図Ａに示すように、シ
ールドリングーの上に適度な粘性を持つ液状ゴム５を適
切な量だけ塗布し、それがゴム化するまでに支持絶縁物
３の一部を矢印６のように押し当ててシールドリングー
に接触させる。An example of a method of filling the liquid rubber 5 will be explained with reference to FIG. 4 for reference. First, as shown in FIG. 4A, apply an appropriate amount of liquid rubber 5 having an appropriate viscosity onto the shield ring, and before it becomes rubberized, part of the support insulator 3 is Press it to make contact with the shield ring.
このようにすることにより、液状ゴム５は、シールドリ
ングーと支持絶縁物３との間のすきま全体にはみ出して
行きわたり、第４図Ｂに示すように、すべてのすきまを
埋め蓋した状態になる。この状態にした後、いまらく放
置しておくと、液状ゴム５は固まり、これを第３図のよ
うに巻線端部に配置する。このようにすれば、工作的に
も比較的容易に、しかも、シ−ルドリングの表面に多少
の凹凸があっても、問題なく、シールドリングと支持絶
縁物との間のくさび状のすきま、特に、その根元を完全
に埋めることができる。By doing this, the liquid rubber 5 spreads over the entire gap between the shield ring and the support insulator 3, filling all the gaps and leaving the lid closed, as shown in FIG. 4B. Become. If left in this state for a while, the liquid rubber 5 will solidify and be placed at the end of the winding as shown in FIG. In this way, it is relatively easy to work, and there is no problem even if the surface of the shield ring has some unevenness, and the wedge-shaped gap between the shield ring and the supporting insulator can be fixed. , the root can be completely buried.
なお、上記支持絶縁物は、ドーナツ形円板状のものでも
よく、また、積み木状のものをシ−ルドリングの円周方
向に適当な間隔をもって放射状に配置してものでもよい
。The support insulator may be in the form of a donut-shaped disk, or may be in the form of building blocks arranged radially at appropriate intervals in the circumferential direction of the shield ring.
本発明の変圧器巻線、特に、その端部絶縁構造はこのよ
うに構成されているが、次にその作用について説明する
。The transformer winding of the present invention, particularly its end insulating structure, is constructed as described above, and its operation will be explained next.
第５図〜第７図は、シールドリングー、変圧器巻線本体
２、アース部４、支持絶縁物３及び液状ゴム５などによ
って構成された巻線端部絶縁構造におけるシールドリン
グーの表面の電位煩度を示したものであり、第５図は支
持絶縁物がない場合の、第６図は支持絶縁物が設けられ
た従釆構造の巻線端部絶縁構造を有する場合の、また、
第７図は本発明による液状ゴムが充填されている巻線端
部絶縁構造の場合のそれぞれのシールドリング表面の電
位煩度を矢印Ｑによって示したものである。Figures 5 to 7 show the surface of the shield ring in the winding end insulation structure composed of the shield ring, the transformer winding body 2, the ground part 4, the support insulator 3, the liquid rubber 5, etc. 5 shows the case where there is no support insulator, and FIG. 6 shows the case where the winding end insulation structure of the subordinate structure is provided with the support insulator.
FIG. 7 shows, by arrow Q, the degree of potential sensitivity on the surface of each shield ring in the case of the winding end insulation structure filled with liquid rubber according to the present invention.
これによると、第３図の状態においては、譲露率ご，が
シールドリングの周囲で一定であり、従って、電界のみ
だれはなく、電位債度は比較的小さい。しかし、実際に
は、変圧器巻線本体２及びシールドリングーを支持する
必要があるために、第５図に示すように、支持絶縁物を
取り除くことは困難である。これに対して従来構造の支
持絶縁物３が設けられた第６図の状態においては、図に
示すように、シールドリングーと支持絶縁物３との間の
くさび状のすきまＢ、特に、その根元部Ｐ及びこれに近
い部分においては、電位頻度が高くなっている。これは
支持絶縁物３の誘電率ご２が周囲の絶縁媒体の誘電率ご
，より大きいために生ずる現象であり、支持絶縁物３の
誘電率ご２を周囲の絶縁媒体の誘電率ご，と同じか、あ
るいは、小さくすれば、このような現象は生じないが、
実際には材料の選定が難しく、周囲の絶縁媒体の誘電率
ど，と同じか、それよりも４・さし、議竃率を有する支
持絶縁物３を設けることは困難である。このような従来
構造のものに対して、本発明による液状ゴム５を充填し
た第７図の状態においては、第６図におけるくさび状の
すきまＢに支持絶縁物とほぼ同じ誘電率を有する液状ゴ
ムが存在するために電界のみだれの影響は小さく、従っ
て、シールドリング１の表面の電位頻度は比較的小さく
なっており、その値は、支持絶縁物を設けない場合であ
る第５図の状態における値に近い。なお、第８図は、第
５図ないし第７図におけるシールドリング表面の電位懐
度を、シールドリング１の表面に沿って矢印×方向に示
したものであつて、符号Ｖは第５図の、のは第６図の、
肌は第７図におけるものの電位頻度の変化を示す曲線で
ある。これによると、従来構造の曲線のの場合は根元部
Ｐ及びその近傍において、急激に電位懐度が高くなるの
に対し、本発明による曲線肌の場合は、支持絶縁物を設
けない曲線Ｖの状態に近い変化を示していることがわか
る。According to this, in the state shown in FIG. 3, the yield rate is constant around the shield ring, so there is no sagging of the electric field and the potential bond is relatively small. However, in reality, it is difficult to remove the supporting insulator as shown in FIG. 5 because it is necessary to support the transformer winding body 2 and the shield ring. On the other hand, in the state shown in FIG. 6 where the support insulator 3 of the conventional structure is provided, as shown in the figure, the wedge-shaped gap B between the shield ring and the support insulator 3, especially the The potential frequency is high in the root portion P and the portions near it. This is a phenomenon that occurs because the dielectric constant of the support insulator 3 is larger than the dielectric constant of the surrounding insulating medium. If it is the same or smaller, this phenomenon will not occur, but
In reality, it is difficult to select a material, and it is difficult to provide a support insulator 3 having a dielectric constant of 4 mm or more than the dielectric constant of the surrounding insulating medium. In contrast to such a conventional structure, in the state shown in FIG. 7 filled with the liquid rubber 5 of the present invention, the wedge-shaped gap B in FIG. 6 is filled with liquid rubber having approximately the same dielectric constant as the supporting insulator. Because of the presence of the shield ring 1, the influence of the electric field sag is small, and therefore the potential frequency on the surface of the shield ring 1 is relatively small, and its value is the same as that in the state shown in Fig. 5 when no supporting insulator is provided. Close to value. In addition, FIG. 8 shows the potential degree of the surface of the shield ring in FIGS. 5 to 7 in the arrow x direction along the surface of the shield ring 1, and the symbol V in FIG. , is shown in Figure 6.
The skin is a curve showing the change in potential frequency of that in FIG. According to this, in the case of the curved line of the conventional structure, the electric potential increases rapidly at the base P and its vicinity, whereas in the case of the curved line of the present invention, the curve V without the support insulator is It can be seen that the change is close to that of the state.
以上のように、本発明によれば、支持絶縁物とシールド
リングとの間のくさび状のすきまに支持絶縁物とほぼ同
値の誘電率を有し且つ液状ゴム等の処理後硬化する液状
絶縁物を充填したことによって、シールドリングの表面
の電位額度を下げることができ、その結果、絶縁距離を
縮小することができて機器を小さくすることができ、経
済的な変圧器巻線が得られるという効果がある。As described above, according to the present invention, a liquid insulator is provided in the wedge-shaped gap between the support insulator and the shield ring, and the liquid insulator has approximately the same dielectric constant as the support insulator and hardens after being treated with liquid rubber or the like. By filling the shield ring, the potential level on the surface of the shield ring can be lowered, and as a result, the insulation distance can be reduced, the equipment can be made smaller, and an economical transformer winding can be obtained. effective.
第１図及び第２図は従来の変圧器巻線の端部絶緑構造の
２例を示す部分断面図、第３図は本発明の一実施例によ
る変圧器巻線の端部絶縁構造を示す部分断面図、第４図
は本発明の変圧器巻線の端部絶縁構造の工作方法の一例
を示すものであってＡは液状ゴムを塗布した直後の状態
を示す説明図、Ｂはシールドリングーと支持絶縁物３と
を押圧した状態を示す説明図、第５図ないし第７図はシ
ールドリング表面の電位懐度を、支持絶縁物が設けられ
ていない場合（第５図）、従来構造の場合（第６図）及
び本発明による液状ゴムを充填した構造の場合（第７図
）について示す説明図、第８図は第５〜７図におけるシ
ールドリング表面の電位煩度変化線図である。
１…・・・シールドリング、２・・…・変圧器巻線本体
、３，３′・・・・・・支持絶縁物、４・・・…アース
部、５・・・・・・液状絶縁物（液状ゴム）、Ａ・・・
・・・円弧部、Ｂ・・・・・・すきま、Ｃ，Ｐ…・・・
根元部、Ｑ・・・・・・電位頻度。
拾１図
第２図
策３図
嫌ム図
猪５図
精６図
拾７図
糖８図1 and 2 are partial sectional views showing two examples of conventional transformer winding end insulating structures, and FIG. 3 shows a transformer winding end insulating structure according to an embodiment of the present invention. FIG. 4 is a partial cross-sectional view showing an example of the method for constructing the end insulation structure of a transformer winding according to the present invention. Explanatory diagrams showing the state in which the ring and the support insulator 3 are pressed, and FIGS. 5 to 7 show the potential strength of the shield ring surface when the support insulator is not provided (FIG. 5), and the conventional An explanatory diagram showing the case of the structure (Fig. 6) and the case of the structure filled with liquid rubber according to the present invention (Fig. 7), and Fig. 8 is a diagram of changes in potential sensitivity of the shield ring surface in Figs. 5 to 7. It is. 1...Shield ring, 2...Transformer winding body, 3, 3'...Support insulator, 4...Grounding section, 5...Liquid insulation Material (liquid rubber), A...
...Arc part, B...Gap, C, P...
Root, Q...Potential frequency. Figure 1, Figure 2, Figure 3, Figure 3, Pig, Figure 5, Figure 6, Figure 17, Figure 8, Figure 1.
Claims (1)
持絶縁物とを有する変圧器巻線において、上記シールド
リングと上記支持絶縁物との間のすきまに、上記支持絶
縁物とほぼ同等の誘電率を有すると共に処理後硬化する
液状絶縁物を充填していることを特徴とする変圧器巻線
。1. In a transformer winding having a shield ring for electric field mitigation and a support insulator that supports the shield ring, the gap between the shield ring and the support insulator has a dielectric constant that is approximately the same as that of the support insulator. What is claimed is: 1. A transformer winding characterized in that the transformer winding is filled with a liquid insulating material which has the following characteristics and is cured after treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56178613A JPS6023491B2 (en) | 1981-11-07 | 1981-11-07 | transformer winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56178613A JPS6023491B2 (en) | 1981-11-07 | 1981-11-07 | transformer winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5879711A JPS5879711A (en) | 1983-05-13 |
| JPS6023491B2 true JPS6023491B2 (en) | 1985-06-07 |
Family
ID=16051504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56178613A Expired JPS6023491B2 (en) | 1981-11-07 | 1981-11-07 | transformer winding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6023491B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01171795U (en) * | 1988-05-18 | 1989-12-05 | ||
| JPH0247118Y2 (en) * | 1986-06-30 | 1990-12-11 | ||
| JPH0247119Y2 (en) * | 1986-06-30 | 1990-12-11 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60247911A (en) * | 1984-05-23 | 1985-12-07 | Mitsubishi Electric Corp | Stationary induction apparatus |
| JPH03159216A (en) * | 1989-11-17 | 1991-07-09 | Toshiba Corp | Gas-insulated transformer |
-
1981
- 1981-11-07 JP JP56178613A patent/JPS6023491B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0247118Y2 (en) * | 1986-06-30 | 1990-12-11 | ||
| JPH0247119Y2 (en) * | 1986-06-30 | 1990-12-11 | ||
| JPH01171795U (en) * | 1988-05-18 | 1989-12-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5879711A (en) | 1983-05-13 |
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