JP2000277353A - Transformer winding - Google Patents
Transformer windingInfo
- Publication number
- JP2000277353A JP2000277353A JP11083383A JP8338399A JP2000277353A JP 2000277353 A JP2000277353 A JP 2000277353A JP 11083383 A JP11083383 A JP 11083383A JP 8338399 A JP8338399 A JP 8338399A JP 2000277353 A JP2000277353 A JP 2000277353A
- Authority
- JP
- Japan
- Prior art keywords
- electric wire
- sections
- winding
- spacer
- section
- 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
- 238000004804 winding Methods 0.000 title claims abstract description 36
- 125000006850 spacer group Chemical group 0.000 claims abstract description 20
- 239000002826 coolant Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 abstract description 14
- 238000000576 coating method Methods 0.000 abstract description 14
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 10
- 238000009413 insulation Methods 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、変圧器の巻線構造
に関する。[0001] The present invention relates to a winding structure of a transformer.
【０００２】[0002]
【従来の技術】図２（ａ）は、変圧器巻線の断面図を示
したものである。鉄心９に低圧側巻線１０と高圧側巻線
１１が同心配置されている。図２（ｂ）は、セクション
６、７間における等電位線１２の分布を示す。図３は、
図２（ａ）の高圧側巻線１１のＡ部の構造をより詳細に
示したものである。巻線は、内側と外側にあるダクト用
レール５でスペーサ２を固定し、電線被覆４により覆わ
れた電線３を同心状に巻回して、円盤状のセクション６
又はセクション７を形成し、スペーサ２と交互に多層に
積み重ねて構成している。また、電線３は、電線渡り部
１４でセクション７からセクション６に渡っている。2. Description of the Related Art FIG. 2A is a sectional view of a transformer winding. A low-voltage side winding 10 and a high-voltage side winding 11 are concentrically arranged on an iron core 9. FIG. 2B shows a distribution of the equipotential lines 12 between the sections 6 and 7. FIG.
FIG. 3 shows the structure of the portion A of the high-voltage side winding 11 in FIG. 2A in more detail. For the winding, the spacer 2 is fixed by the inner and outer duct rails 5, and the electric wire 3 covered with the electric wire coating 4 is concentrically wound to form a disc-shaped section 6.
Alternatively, a section 7 is formed, and the section 7 is alternately stacked with the spacers 2 to form a multilayer. Further, the electric wire 3 extends from the section 7 to the section 6 at the electric wire crossing portion 14.
【０００３】従来、セクション６、７間における絶縁
は、図３スペーサ２により、ある間隔をおいて絶縁され
ている。そのセクション６、７間には、電界が発生し、
その電界の様子を図２（ｂ）に示す。セクション６、７
間には等電位線１２が発生し、低圧側巻線１０と高圧側
巻線１１の間の電位差及び高圧側巻線１１のセクション
６，７間の電位差により電界を生じる。この等電位線１
２の間隔が密になるほど電界が集中していることを示
し、高圧側巻線１１を構成する電線３のうち電線角部１
３においては、電線３の角部曲率が大きいためこの部分
に局部的な電解集中が生じる。セクション６，７間の絶
縁破壊のほとんどは、この電界集中箇所から部分放電が
生じて、絶縁破壊に至る。それは、高圧側巻線１１のセ
クション６、７間の構造や距離によって、電線角部１３
への電界集中が変わり部分放電発生電圧及び部分放電の
進展が変わってくる。このため、電線角部１３の電界集
中緩和のためにセクション６，７間の絶縁距離を大きく
する必要があるが、巻線が大きくなることは経済的でな
いため、絶縁距離は縮小した構造とすることが望まし
い。そのため、セクション６，７間の絶縁性能を電線被
覆４で確保するために電線角部１３四すみの電線被覆４
のみを部分的に厚くしたいが、そのためには電線被覆４
の厚さが違う電線３同士を溶接でつなぎ合わせる必要が
あり、作業性の悪化につながるため、巻線を構成する電
線３の電線被覆４を全長にわたって厚くすることでセク
ション６、７間の絶縁性能を確保している。Conventionally, the insulation between the sections 6 and 7 is insulated at a certain interval by the spacer 2 in FIG. An electric field is generated between the sections 6 and 7,
The state of the electric field is shown in FIG. Sections 6, 7
An equipotential line 12 is generated therebetween, and an electric field is generated by a potential difference between the low-voltage side winding 10 and the high-voltage side winding 11 and a potential difference between the sections 6 and 7 of the high-voltage side winding 11. This equipotential line 1
2 indicates that the electric field is more concentrated as the distance between the electric wires 3 becomes smaller.
In No. 3, since the curvature of the corner of the electric wire 3 is large, local electrolytic concentration occurs in this portion. Almost all of the dielectric breakdown between the sections 6 and 7 is caused by partial discharge from the electric field concentrated portion, which leads to dielectric breakdown. It depends on the structure and the distance between the sections 6 and 7 of the high-voltage side winding 11, depending on the wire corner 13.
The concentration of the electric field on the electrode changes, and the partial discharge generation voltage and the progress of the partial discharge change. For this reason, it is necessary to increase the insulation distance between the sections 6 and 7 in order to alleviate the electric field concentration at the wire corner 13, but since it is not economical to increase the winding, the insulation distance is reduced. It is desirable. Therefore, in order to secure the insulation performance between the sections 6 and 7 with the electric wire coating 4, the electric wire coating 4 of the four corners of the electric wire 13 is provided.
Only to partially increase the thickness of the wire,
It is necessary to join the wires 3 having different thicknesses by welding, which leads to deterioration of workability. Therefore, the insulation between the sections 6 and 7 is increased by increasing the thickness of the wire coating 4 of the wires 3 constituting the winding over the entire length. Performance is assured.
【０００４】電線被覆４が厚くなると、巻線を構成する
電線３から発生する熱が電線３内部に蓄積され、絶縁物
が高温にさらされてしまうので、絶縁物の劣化を防ぐた
めに電線３を冷却媒体で冷却する必要がある。電線３の
発熱量をＱ（Ｗ）、電線３表面の発熱面積をＳ
（ｍ２）、電線被覆４の厚さをｉ（ｍ）、電線被覆４の
熱伝導率をｐ（Ｗ／ｍ・Ｋ）とすると、電線３と電線被
覆４の温度差Δθ（Ｋ）は次式で表せる。 Δθ＝（Ｑ／Ｓ）・（ｉ／ｐ） 電線３から発生する熱量Ｑを小さな温度差Δθで巻線外
に放出する場合、上式より電線被覆４の厚さｉを小さく
する必要がある。つまり、冷却性能を考えた場合、電線
被覆４はできるだけ薄い方がよい。しかし、電線３のう
ち最も電界集中の激しい箇所である電線角部１３の絶縁
強度を確保するために、電線３の全長にわたって電線被
覆４を厚くしているため、電線３の冷却効率低下の原因
をつくっている。[0004] When the electric wire coating 4 becomes thicker, heat generated from the electric wire 3 constituting the winding is accumulated in the electric wire 3 and the insulator is exposed to a high temperature. It is necessary to cool with a cooling medium. The heat value of the wire 3 is Q (W), and the heat generation area of the surface of the wire 3 is S
(M 2 ), assuming that the thickness of the wire coating 4 is i (m) and the thermal conductivity of the wire coating 4 is p (W / m · K), the temperature difference Δθ (K) between the wire 3 and the wire coating 4 is It can be expressed by the following equation. Δθ = (Q / S) · (i / p) When releasing the heat quantity Q generated from the electric wire 3 out of the winding with a small temperature difference Δθ, it is necessary to reduce the thickness i of the electric wire coating 4 from the above equation. . That is, in consideration of the cooling performance, it is better that the electric wire coating 4 is as thin as possible. However, in order to secure the insulation strength of the wire corner portion 13 where the electric field concentration is most intense in the wire 3, the wire coating 4 is thickened over the entire length of the wire 3, which causes a reduction in the cooling efficiency of the wire 3. Is making.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、絶縁性能を
低下させることなく、冷却性能の向上を図った変圧器巻
線を提供することを課題としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a transformer winding having improved cooling performance without lowering insulation performance.
【０００６】[0006]
【課題を解決するための手段】鉄心と円盤状巻線を同心
配置した変圧器巻線において、巻線の全周を数十等配で
放射状に配置した冷却媒体を通すためのスペーサに間隔
片が１個以上表面に接着されたＬ形キャップを挟み込み
一組としたＬ形キャップ付きスペーサをセクション間に
配置した構造とする。Means for Solving the Problems In a transformer winding in which an iron core and a disk-shaped winding are arranged concentrically, a spacing piece is provided on a spacer for passing a cooling medium which is radially arranged in a dozens of equal intervals around the winding. Has a structure in which an L-shaped cap with one or more L-type caps is sandwiched between the sections and a set of spacers with an L-shaped cap is arranged between the sections.
【０００７】[0007]
【発明の実施の形態】図１は、本発明の実施の一例の形
態を示す巻線構造図であり、（ａ）は巻線構造の断面
図、（ｂ）はスペーサ２に挟み込むＬ形キャップ１の構
造を示し、（ｃ）はスペーサ２の構造を示す。巻線は、
内側と外側にあるダクト用レール５でスペーサ２を固定
し、電線被覆４により覆われた電線３を同心状に巻回し
て、円盤状のセクション６又はセクション７を形成し、
スペーサ２と交互に多層に積み重ねて構成している。ま
た、電線３は、電線渡り部１４でセクション７からセク
ション６に渡っている。巻線を構成する電線３は、円盤
状に巻回されたセクション６，７を軸方向に多層に積み
重ね、セクション６，７間の間隙にはスペーサ２が挿入
されてセクション６、７を保持している。図１（ａ）に
示すように、Ｌ形キャップ１の挿入してある部位の電線
３は、間隔片８と接しておりこれにより保持される。FIG. 1 is a winding structure diagram showing an embodiment of the present invention. FIG. 1 (a) is a sectional view of the winding structure, and FIG. 1 (b) is an L-shaped cap sandwiched between spacers 2. 1 shows the structure, and (c) shows the structure of the spacer 2. The winding is
The spacer 2 is fixed by the inner and outer duct rails 5, and the electric wire 3 covered with the electric wire coating 4 is concentrically wound to form a disk-shaped section 6 or section 7.
The spacers 2 are alternately stacked in multiple layers. Further, the electric wire 3 extends from the section 7 to the section 6 at the electric wire crossing portion 14. The electric wire 3 constituting the winding is formed by stacking sections 6 and 7 wound in a disk shape in a multilayer structure in the axial direction, and a spacer 2 is inserted into a gap between the sections 6 and 7 to hold the sections 6 and 7. ing. As shown in FIG. 1A, the electric wire 3 at the portion where the L-shaped cap 1 is inserted is in contact with the spacing piece 8 and is held by this.
【０００８】セクション６，７間におけるＬ形キャップ
１の絶縁効果について説明する。平等電界中の油ギャッ
プの破壊電EBD(kV/mm)とギャップ長d(mm)との関係は一
般に次式で表される。 EBD=k・d-1/3（k：定数） 上式は油のギャップ長ｄが小さくなれば油の破壊電界Ｅ
BDが大きくなる、つまり油の耐圧が向上することを表し
ている。このような、ギャップ長特性を利用すれば、セ
クション６，７間をＬ形キャップ１で分割すればギャッ
プ長が等しくても破壊電圧を向上させることができる。
また、Ｌ形キャップ１は、発生した部分放電の進展を防
ぐバリアの効果としても働く。電線３のうちの電界集中
の厳しい電線角部１３を部分的に絶縁することで電線３
の電線被覆４を全長にわたって薄くすることが可能とな
り、冷却性能の向上を図ることがでる。また、Ｌ形キャ
ップ１を用いた箇所では、電線３は間隔片８により保持
されるので、電線３が冷却媒体に接する面積が増えるた
め、冷却油道が確保されるので冷却効率向上が図れる。The insulating effect of the L-shaped cap 1 between the sections 6 and 7 will be described. The relationship between the breakdown voltage E BD (kV / mm) of the oil gap and the gap length d (mm) in a uniform electric field is generally expressed by the following equation. E BD = k · d -1/3 (k: constant)
This indicates that the BD is increased, that is, the pressure resistance of the oil is improved. If such gap length characteristics are used, the breakdown voltage can be improved even if the gap lengths are equal by dividing the sections 6 and 7 with the L-shaped cap 1.
Further, the L-shaped cap 1 also functions as a barrier effect for preventing the progress of the generated partial discharge. By partially insulating the wire corner 13 of the wire 3 where electric field concentration is severe, the wire 3
Can be made thinner over the entire length, and the cooling performance can be improved. Further, since the electric wire 3 is held by the spacing piece 8 at the position where the L-shaped cap 1 is used, the area where the electric wire 3 is in contact with the cooling medium increases, and a cooling oil passage is secured, so that the cooling efficiency can be improved.
【０００９】[0009]
【発明の効果】以上のことから、セクション間の絶縁性
能を維持しつつ、電線被覆厚の減少により電線の冷却性
能の向上を図ることができる。As described above, the cooling performance of the electric wire can be improved by reducing the thickness of the electric wire coating while maintaining the insulation performance between the sections.
【図１】本発明の実施の形態の一例を示す巻線構成図で
あり、（ａ）は巻線断面図、（ｂ）はＬ形キャップの構
造図、（ｃ）はスペーサの構造図を示す。1A and 1B are winding configuration diagrams illustrating an example of an embodiment of the present invention, in which FIG. 1A is a winding cross-sectional view, FIG. 1B is a structural diagram of an L-shaped cap, and FIG. Show.
【図２】（ａ）は、巻線の側断面図を示し、（ｂ）は
（ａ）のＡ部分を拡大し、等電位線の分布を示した図で
ある。2A is a side sectional view of a winding, and FIG. 2B is an enlarged view of a portion A in FIG. 2A and shows a distribution of equipotential lines.
【図３】従来からなる巻線断面図を示す。FIG. 3 shows a sectional view of a conventional winding.
１ Ｌ形キャップ ２ スペーサ ３ 電線 ４ 電線被覆 ５ ダクト用レール ６ セクション ７ セクション ８ 間隔片 ９ 鉄心 １０ 低圧側巻線 １１ 高圧側巻線 １２ 等電位線 １３ 電線角部 １４ 電線渡り部 DESCRIPTION OF SYMBOLS 1 L-shaped cap 2 Spacer 3 Electric wire 4 Electric wire covering 5 Duct rail 6 Section 7 Section 8 Spacing piece 9 Iron core 10 Low voltage side winding 11 High voltage side winding 12 Equipotential line 13 Wire corner 14 Wire crossover
Claims (1)
巻線において、巻線の全周を数十等配で放射状に配置し
た冷却媒体を通すためのスペーサに間隔片が１個以上表
面に接着されたＬ形キャップを挟み込み一組としたＬ形
キャップ付きスペーサをセクション間に配置したことを
特徴とする変圧器巻線。In a transformer winding in which an iron core and a disk-shaped winding are concentrically arranged, at least one spacer piece is provided on a spacer for passing a cooling medium radially arranged in a dozens of equal intervals around the winding. A transformer winding characterized in that a set of spacers with an L-shaped cap sandwiching an L-shaped cap bonded to a surface is arranged between sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11083383A JP2000277353A (en) | 1999-03-26 | 1999-03-26 | Transformer winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11083383A JP2000277353A (en) | 1999-03-26 | 1999-03-26 | Transformer winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000277353A true JP2000277353A (en) | 2000-10-06 |
Family
ID=13800911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11083383A Pending JP2000277353A (en) | 1999-03-26 | 1999-03-26 | Transformer winding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000277353A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003077737A (en) * | 2001-09-06 | 2003-03-14 | Mitsubishi Electric Corp | Winding of electric equipment |
| JP2008041763A (en) * | 2006-08-02 | 2008-02-21 | Mitsubishi Electric Corp | Oil-filled electric device |
| JP2011228675A (en) * | 2010-03-30 | 2011-11-10 | Tdk Corp | Spacer, coil, coil component, and switching power supply unit |
| JP5885898B1 (en) * | 2015-08-10 | 2016-03-16 | 三菱電機株式会社 | Stationary induction equipment |
-
1999
- 1999-03-26 JP JP11083383A patent/JP2000277353A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003077737A (en) * | 2001-09-06 | 2003-03-14 | Mitsubishi Electric Corp | Winding of electric equipment |
| JP2008041763A (en) * | 2006-08-02 | 2008-02-21 | Mitsubishi Electric Corp | Oil-filled electric device |
| JP2011228675A (en) * | 2010-03-30 | 2011-11-10 | Tdk Corp | Spacer, coil, coil component, and switching power supply unit |
| JP5885898B1 (en) * | 2015-08-10 | 2016-03-16 | 三菱電機株式会社 | Stationary induction equipment |
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