JPS60249308A - Foil wound transformer - Google Patents
Foil wound transformerInfo
- Publication number
- JPS60249308A JPS60249308A JP10468284A JP10468284A JPS60249308A JP S60249308 A JPS60249308 A JP S60249308A JP 10468284 A JP10468284 A JP 10468284A JP 10468284 A JP10468284 A JP 10468284A JP S60249308 A JPS60249308 A JP S60249308A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- foil
- metal sheet
- sheet
- wound
- 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.)
- Granted
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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、金属シートと絶縁シートを重ねて巻いて成る
箔状巻線を備えた箔巻変圧器に関するもので、特にこの
箔状巻線の短絡機械力強化、巻線支え構造を改良した箔
巻変圧器に関するものでおる。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a foil-wound transformer equipped with a foil winding formed by overlappingly wound a metal sheet and an insulating sheet. This article concerns a foil-wound transformer with improved short-circuit mechanical strength and improved winding support structure.
金属シートと絶縁シートとを重ねて巻回して巻線を構成
する箔巻変圧器は、巻線の占積率が優れていること、電
位分布が良好なこと、製造が簡単なことなどにより小形
・軽量化を実現できる特徴がある。既に数ＫＶ 、数百
ＫＶ八へ度の比較的電圧の低い小容量の変圧器ではとの
箔巻変圧器が数多く用いられている。Foil-wound transformers, whose windings are constructed by overlapping metal sheets and insulating sheets, are compact because they have an excellent winding space factor, good potential distribution, and are easy to manufacture.・It has the feature of being lightweight. Many foil-wound transformers have already been used for small capacity transformers with relatively low voltages of several kilovolts or hundreds of kilovolts.
一般に変圧器の巻線には、巻線の（電流Ｘ巻回数）の値
に応じて、鉄心脚に同心的に巻回された低圧巻線と高圧
巻線間の間隙、及び夫々の巻線内に、巻線の軸方向を主
成分とする漏れ磁束が生じ、この漏れ磁束と巻線内を流
れる電流により巻線には軸方向と直角な半径方向に電磁
機械力が働く。In general, the winding of a transformer has a gap between the low voltage winding and the high voltage winding, which are wound concentrically around the core leg, and a gap between each winding, depending on the value of (current x number of turns) of the winding. A leakage magnetic flux whose main component is in the axial direction of the winding is generated within the winding, and this leakage flux and the current flowing within the winding cause an electromagnetic mechanical force to act on the winding in the radial direction perpendicular to the axial direction.
一方、箔巻変圧器においては箔状巻線の導体幅が広いた
め、導体に入射する半径方向の磁束を打ち消そうとする
渦電流が導体中に流れるため漏れ磁束は巻線内部では軸
方向に生じ、巻線端部のところで、急激に半径方向に曲
が９、巻線の上下で対称に分布する。故に箔巻変圧器に
おいて、低圧巻線と高圧巻線の導体幅を同じにして、導
体端部をそろえたものでは、電磁機械力は半径方向成分
のみが問題とされ、巻線の軸方向の締付けや支え一構造
に対する考慮はあまり必要とされない。このため従来の
低電圧、 ／Ｊ・容量の箔巻変圧器では、金属シートや
絶縁シートに若干のテンションを加えて巻回すればシー
ト相互間の摩擦力で巻線のズレを防ぎその重量を支える
ことができる。また、テンションを加えないで巻回する
箔巻変圧器では、鉄心を脚部と両側面に締付金具を備え
た継鉄部とで構成し、この鉄心の脚部の周囲に配置した
絶縁筒上に金属シートと絶縁シートを巻回して成る箔状
巻線及びこの箔状巻線の両端部に絶縁物を介して締付板
を配置し、締付金具によって箔状巻線、絶縁物及び締付
板を固定する構造がとられることもある。On the other hand, in a foil-wound transformer, the conductor width of the foil winding is wide, so eddy currents flow in the conductor that try to cancel out the magnetic flux incident on the conductor in the radial direction, so leakage magnetic flux flows in the axial direction inside the winding. At the end of the winding, an abrupt radial bend 9 occurs, distributed symmetrically above and below the winding. Therefore, in a foil-wound transformer, in which the conductor width of the low-voltage winding and the high-voltage winding are the same and the conductor ends are aligned, only the radial component of the electromagnetic mechanical force is a problem, and the axial direction of the winding is Less consideration is required for tightening and supporting structures. For this reason, in conventional low-voltage, /J-capacity foil-wound transformers, by winding metal sheets or insulating sheets with a slight tension, the friction between the sheets prevents the windings from shifting and reduces their weight. It can be supported. In addition, in a foil-wound transformer that is wound without applying tension, the core consists of legs and a yoke with clamping metal fittings on both sides, and an insulating tube is placed around the legs of the core. A foil winding is formed by winding a metal sheet and an insulating sheet on top of the foil winding, and clamping plates are arranged at both ends of the foil winding with an insulator interposed therebetween. A structure in which the clamping plate is fixed may also be used.
一方、最近箔巻変圧器はその優れた長所に鑑みよシ高電
圧、大容量の変圧器、例えば２７５ＫＶ、数百ＭＶＡ級
変圧変圧器適用拡大が研究されているが、実用化に当っ
ての技術的な課題は、巻線ターン数の増加、短絡電流の
増大、形状寸法の拡大などから、運転時の振動、短絡機
械力に対する強化、さらには巻線自身の支え構造の改良
といった点などがあげられる。即ち、箔状巻線の製作で
、金属シートと絶縁シートにテンションを加えて巻回し
た場合幅広かつ巻回数の多いシートをテンション管理す
ることは非常に困難であり、さらに箔状巻線の巻回ター
ン間には、冷却路が形成されるため、この部分での半径
方向の締付力が低下してコイルズレを発生する恐れがあ
る。故に、高電圧、大容量の箔巻変圧器では、より巻線
の支え構造の改良が必要となってくる。一方、箔状巻線
の製作において、巻線の端面には、金属シート端部の凹
凸が生じるが、幅広かつ巻回数の多い箔状巻線ではこの
凹凸の差は史に大きくなる。また低圧巻線と高圧巻線と
の金属シート幅には誤差があシ、さらに、低圧巻線と高
圧巻線の中心がズレることは避けられない。このため漏
れ磁束の分布は巻線の上下で非対称となシ、巻線には、
漏れ磁束の半径方向成分と電流による軸方向の電磁機械
力が働き、高電圧、大容量の箔巻変圧器では運転時の巻
線振動、短絡機械力の軸方向成分の増大が無視できなく
なり、巻線端部が座屈を起こしたシ締付板や締付金物の
強度が問題となる。これらの対策として、巻線端部を樹
脂等で固めて補強することが考えられるが、この場合、
変圧器の長期間にわたる運転によって樹脂にクラックが
生じ巻線端部よりコロナが発生する恐れがある。また、
締付板の機械強度を増すために締付板を厚くすることは
、鉄心の窓が高くなシ好ましくない。On the other hand, recently, considering the excellent advantages of foil-wound transformers, research has been conducted to expand the application of high-voltage, large-capacity transformers, such as 275KV and several hundred MVA class transformers. Technical issues include an increase in the number of winding turns, an increase in short-circuit current, an increase in shape and size, vibration during operation, reinforcement against short-circuit mechanical force, and improvements in the support structure of the winding itself. can give. In other words, when manufacturing a foil winding, when winding a metal sheet and an insulating sheet under tension, it is extremely difficult to control the tension on a wide sheet with a large number of turns. Since a cooling path is formed between the turns, the tightening force in the radial direction is reduced in this portion, and there is a possibility that the coil may become misaligned. Therefore, in high-voltage, large-capacity foil-wound transformers, it is necessary to improve the support structure of the windings. On the other hand, in the production of foil windings, the end faces of the windings have irregularities at the ends of the metal sheet, but in foil windings that are wide and have a large number of turns, the difference in these irregularities becomes larger than ever before. Furthermore, there is an error in the metal sheet width between the low voltage winding and the high voltage winding, and furthermore, it is inevitable that the centers of the low voltage winding and the high voltage winding will be misaligned. For this reason, the distribution of leakage magnetic flux is asymmetric between the top and bottom of the winding.
The radial component of the leakage magnetic flux and the axial electromagnetic mechanical force due to the current act, and in high voltage, large capacity foil-wound transformers, winding vibration during operation and an increase in the axial component of the short-circuit mechanical force cannot be ignored. If the end of the winding buckles, the strength of the clamping plate or clamping hardware becomes a problem. As a countermeasure to these problems, it is possible to strengthen the ends of the windings by hardening them with resin, etc., but in this case,
When a transformer is operated for a long period of time, cracks may occur in the resin and corona may be generated from the ends of the windings. Also,
Increasing the thickness of the clamping plate to increase the mechanical strength of the clamping plate is undesirable because the window of the iron core becomes high.
本発明は、上記従来技術における種々の問題点に鑑みな
されたものであシ、運転時の巻線振動、短絡機械力に対
する強度を増大し安定した巻線支え構造を備えた信頼性
の高い、特に高電圧、大容量に適する箔巻変圧器を得る
こと−を目的としている。The present invention has been made in view of the various problems in the prior art described above, and provides a highly reliable winding support structure that increases strength against winding vibration during operation and short-circuit mechanical force and has a stable winding support structure. The purpose is to obtain a foil-wound transformer particularly suitable for high voltage and large capacity.
本発明は以上の目的を達成するために金属シートと、こ
の金属シートより幅広の絶縁シートを重ねて巻回した箔
状巻線の端部の絶縁シート間に金属シートと同じ厚さの
端部横曲を施し、この箔状巻線の両端部に絶縁物を介し
て、けい素鋼板を巻回し円周上の１ケ所を切断したＣ形
の円板を配置し、締付金具によって箔状巻線を鉄心脚周
囲に固定することによシ運転時の巻線振動、短絡機械力
に対する強度を増大すると共に効果的に漏れ磁束を制御
するようにした高電圧、大容量の箔巻変圧器の巻線支え
構成を特徴とするものである。In order to achieve the above objects, the present invention provides an edge with the same thickness as the metal sheet between a metal sheet and an insulating sheet at the end of a foil winding formed by overlapping and winding an insulating sheet wider than the metal sheet. A C-shaped disk made by winding a silicon steel plate and cutting at one point on the circumference is placed on both ends of the foil-shaped winding with an insulator interposed between them, and the foil-shaped A high-voltage, large-capacity foil-wound transformer in which the winding is fixed around the core legs to increase strength against winding vibration and short-circuit mechanical force during operation, and to effectively control leakage flux. It is characterized by a winding support configuration.
〔発明の実施例〕
以下本発明の一実施例を第１図及び第２図をもって説明
する。[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図は本発明による箔巻変圧器の内部構造の縦断面図
を示し、１は鉄心で、この鉄心１の脚部１ａの周囲に間
かくをおいて配置された絶縁筒３上には金属シー）４ａ
とこの金属シート４ａよシ幅の広い絶縁シー） ４ｂ
を重ねて巻回した箔状巻線４が夫々設けられ低圧巻線、
高圧巻線が構成される。金属７−）４ａ の端部には金
属シー）４ａとほぼ同じ長さの端部横曲４Ｃが絶縁シー
） ４ｂ間に施されている。この箔状巻線４の上、下両
端部には、絶縁物５を介して円板８が取付けられる。FIG. 1 shows a vertical cross-sectional view of the internal structure of a foil-wound transformer according to the present invention, in which 1 is an iron core, and on an insulating tube 3 placed at a distance around a leg portion 1a of this iron core 1. metal sea) 4a
The metal sheet 4a and the wide insulation sheet) 4b
The foil-like windings 4 are each provided with a low-voltage winding,
A high voltage winding is constructed. At the end of the metal sheet 7-4a, a transverse end bend 4C having approximately the same length as the metal sheet 4a is provided between the insulating sheet 4b. A disk 8 is attached to both the upper and lower ends of the foil winding 4 with an insulator 5 interposed therebetween.
円板８は第２図に示すように１けい素鋼板を巻回してリ
ング状に形成し、且つ１ターン形成しないようにその円
周上の１ケ所を切断したＣ形の円板であり、取扱いに便
利なように樹脂等で固められている。箔状巻線４の重量
は、絶縁物５を介して円板８で支えられる。さらに、箔
状巻線４、絶縁物５、及び円板８は鉄心の締付金具２に
よってその上、下から締付固定される。As shown in FIG. 2, the disk 8 is a C-shaped disk formed by winding one silicon steel plate into a ring shape and cutting one place on the circumference so as not to form one turn. It is hardened with resin etc. for convenient handling. The weight of the foil winding 4 is supported by the disc 8 via the insulator 5. Further, the foil winding 4, the insulator 5, and the disk 8 are tightened and fixed from above and below by the iron core tightening fittings 2.
以上の様な構成を有する本発明による箔巻変圧器におい
ては金属シー）４８部分で軸方向に生じた漏れ磁束７は
、けい素鋼板を巻回した円板８によって誘導され金属シ
ー）４ａ の端部で曲がることなく軸方向に沿って進み
円板８に吸収されるため、もれ磁束７０半径方向成分は
大幅に減少する。In the foil-wound transformer according to the present invention having the above-mentioned configuration, the leakage magnetic flux 7 generated in the axial direction at the metal sheath 48 is induced by the disk 8 wound with a silicon steel plate, and the leakage flux 7 is induced by the metal sheath 4a Since it advances along the axial direction without being bent at the end and is absorbed by the disk 8, the radial component of the leakage magnetic flux 70 is significantly reduced.
故に、箔状巻線の製作において金塊シー）４ａ端部の凹
凸、低圧巻線と高圧巻線との金属シート幅の違い、及び
その巻線中心のズレ等が発生しても漏れ磁束と電流によ
る軸方向の電磁機械力は大幅に減少する。従って高電圧
、大容量の変圧器に箔状巻線を適用しても、運転時の巻
線振動は低減され、短絡機械力の軸方向成分は大幅に減
少するため、巻線の軸方向については、従来の低電圧、
小容量の箔巻変圧器と同様に巻線重量の支えについて考
慮すれば十分である。よって巻線の端部は絶縁シー）４
ｂ と端部横曲４Ｃによって問題なく支持され、けい素
鋼板を巻回した円板８は巻線の重量を支えるとともに締
付金具２によシ箔状巻線４の両端を締付は固定すること
で安定した巻線支持が得られる。Therefore, in the production of foil windings, even if irregularities on the ends of the gold ingot sheet (4a), differences in the width of the metal sheets between low-voltage windings and high-voltage windings, and misalignment of the centers of the windings occur, the leakage flux and current will be reduced. The axial electromagnetic mechanical force due to the Therefore, even if a foil winding is applied to a high-voltage, large-capacity transformer, the winding vibration during operation is reduced, and the axial component of the short-circuit mechanical force is significantly reduced. is the traditional low voltage,
It is sufficient to consider supporting the weight of the windings in the same way as for small-capacity foil-wound transformers. Therefore, the end of the winding is an insulation sheet)4
b and the horizontally curved end 4C, the disc 8 wound with silicon steel plate supports the weight of the winding, and the clamping fitting 2 fastens both ends of the foil-like winding 4 to fix it. By doing so, stable winding support can be obtained.
さらに、漏れ磁束が軸方向に沿って分布することにより
導体の渦電流も減少するため巻線の損失も２〜３割減少
するといった低損失の効果も得られる。Furthermore, since the leakage magnetic flux is distributed along the axial direction, the eddy current in the conductor is also reduced, so that the loss in the winding wire is also reduced by 20 to 30%, thereby achieving a low loss effect.
なお、本実施例では、箔状巻線４は絶縁物５を介して円
板８で支持されているが、箔状巻線４の端部の絶縁シー
）４ｂ と端部横曲４ｃ を軸方向に延ばして円板８で
直接締付固定してもよい。In this embodiment, the foil winding 4 is supported by a disk 8 via an insulator 5, but the insulation sheet 4b at the end of the foil winding 4 and the horizontal bend 4c of the end are supported as axes. It may be extended in the direction and directly tightened and fixed with the disk 8.
以上述べた様に本発明によれば、巻線の端部の絶縁シー
ト間に金属シートと同じ厚さの横物を施した箔状巻線と
、この巻線の両端部に絶縁物を介してけい素鋼板を巻回
し、円周上の１ケ所を切断したＣ形の円板を配置し締付
金具によって固定することによシ、運転時の巻線振動や
短絡機械力が問題とならない、安定した巻線支え構造を
備えた信頼性の高い高電圧、大容量に適した箔巻変圧器
を提供できる。As described above, according to the present invention, there is provided a foil-like winding in which a horizontal material having the same thickness as a metal sheet is provided between insulating sheets at the ends of the winding, and an insulating material interposed between both ends of the winding. By winding a silicon steel plate and arranging a C-shaped disk cut at one point on the circumference and fixing it with a tightening fitting, there are no problems with winding vibration or short-circuit mechanical force during operation. , we can provide a highly reliable foil-wound transformer with a stable winding support structure suitable for high voltage and large capacity.
第１図は本発明の一実施例を示す断面図、第２図は本発
明に用いられる円板を示す斜視図である。
１ 鉄心 １ａ 脚部
１ｂ・・継鉄部 ２ ・締付金具
３・・絶縁筒 ４ 箔状巻線
４ａ・・金属シート ４ト・・ｈａレシートＣ・端部横
曲 ５ 絶縁物
６ 締付板 ７ 漏れ磁束
８・円板FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing a disc used in the present invention. 1 Iron core 1a Leg part 1b...Yoke part 2 - Tightening metal fitting 3...Insulation tube 4 Foil winding 4a...Metal sheet 4T...ha Receipt C/Horizontal bend at end 5 Insulator 6 Tightening plate 7 Leakage magnetic flux 8・Disk
Claims (3)
ートとを重ねて成る箔状巻線を鉄心の周囲に巻回した箔
巻変圧器において、金属シート端部の、ｅ＊シート間に
金属シートと同じ厚さの端部填物を施し、その両端部に
絶縁物を介してけい素鋼板によシ形成され円周の少くと
も１ケ所が切断された円板を配置しこの円板によシ箔状
巻線を支持するようにしたことを特徴とする箔巻変圧器
。(1) In a foil-wound transformer in which a foil winding consisting of a metal sheet and an insulating sheet with a wider width than the metal sheet is wound around an iron core, there is a space between the e* sheets at the end of the metal sheet. The ends are filled with the same thickness as the metal sheet, and a disk made of a silicon steel plate with an insulator interposed between the edges and cut at at least one point on the circumference is placed on both ends of the disk. A foil-wound transformer characterized by supporting a foil-like winding.
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 disk is hardened with resin.
を形成したことを特徴とする特許請求の範囲第１項記載
の箔巻変圧器。(3) The foil-wound transformer according to claim 1, wherein the insulating material is formed by extending the insulating sheet and the end horizontal member in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10468284A JPS60249308A (en) | 1984-05-25 | 1984-05-25 | Foil wound transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10468284A JPS60249308A (en) | 1984-05-25 | 1984-05-25 | Foil wound transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60249308A true JPS60249308A (en) | 1985-12-10 |
| JPH0548604B2 JPH0548604B2 (en) | 1993-07-22 |
Family
ID=14387237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10468284A Granted JPS60249308A (en) | 1984-05-25 | 1984-05-25 | Foil wound transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60249308A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60261117A (en) * | 1984-06-08 | 1985-12-24 | Toshiba Corp | Foil-wound transformer |
| CN104505237A (en) * | 2015-01-14 | 2015-04-08 | 东南大学 | Adjustable reactor based on cross magnetization principle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5563130U (en) * | 1978-10-25 | 1980-04-30 | ||
| JPS55176536U (en) * | 1979-06-06 | 1980-12-18 |
-
1984
- 1984-05-25 JP JP10468284A patent/JPS60249308A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5563130U (en) * | 1978-10-25 | 1980-04-30 | ||
| JPS55176536U (en) * | 1979-06-06 | 1980-12-18 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60261117A (en) * | 1984-06-08 | 1985-12-24 | Toshiba Corp | Foil-wound transformer |
| CN104505237A (en) * | 2015-01-14 | 2015-04-08 | 东南大学 | Adjustable reactor based on cross magnetization principle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0548604B2 (en) | 1993-07-22 |
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