JPH0616453B2 - Foil winding transformer - Google Patents
Foil winding transformerInfo
- Publication number
- JPH0616453B2 JPH0616453B2 JP58178121A JP17812183A JPH0616453B2 JP H0616453 B2 JPH0616453 B2 JP H0616453B2 JP 58178121 A JP58178121 A JP 58178121A JP 17812183 A JP17812183 A JP 17812183A JP H0616453 B2 JPH0616453 B2 JP H0616453B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- cooling duct
- foil
- refrigerant
- insulation
- 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 - Lifetime
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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
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た箔状の
巻線を備え、巻線内に冷却ダクトを内蔵する方式の箔巻
変圧器に関する。Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a foil winding transformer of a type including a foil-shaped winding in which a metal sheet and an insulating sheet are stacked and wound, and a cooling duct is built in the winding. .
鉄心に箔状の巻線を巻いた箔巻変圧器は、占積率がよい
ので小形、軽量化を実現できる特長がある。すでに数ｋ
Ｖ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。Foil-wound transformers, which have foil-shaped windings wound around an iron core, have a good space factor and are therefore compact and lightweight. Already a few k
It has been put to practical use in small-capacity transformers with a relatively low voltage of about 100 kVA.
最近に至り、その優れた長所に鑑み、より高電圧、大容
量の例えば275kV,300MVA変圧器に適用拡大が要望されて
いる。しかしこれを実現するための最大の技術的問題点
は、いかに冷却能力を向上させ、高い絶縁能力を巻線に
もたらせるかにかかっている。また、このような高電圧
大容量変圧器は実用化はされていないが、すでに公知で
あり研究されている箔巻変圧器は巻線内に冷却ダクトを
内蔵させ、絶縁特性の優れた冷媒を送り込み、巻線損失
から発生する熱を直接的に冷やす、いわばヒートパイプ
式のものが考えられている。In recent years, in view of its excellent merits, there is a demand for wider application to higher voltage and large capacity transformers such as 275kV, 300MVA. However, the biggest technical problem in achieving this depends on how to improve the cooling capacity and provide the winding with high insulation capacity. Further, although such a high-voltage large-capacity transformer has not been put into practical use, a foil winding transformer that is already known and has been researched has a cooling duct built into the winding to provide a refrigerant with excellent insulation characteristics. A so-called heat pipe type is considered, which directly cools the heat generated from the feeding and winding loss.
第１図に従来公知の箔巻変圧器の構造を示す。鉄心１の
外側に金属シート２と絶縁シート３を重ねて、公知の箔
巻巻線方式の低圧巻線４と高圧巻線５を巻き、低圧、高
圧各巻線4,5とも夫々それら巻線間に環状の冷却ダクト
６を内蔵させる。この冷却ダクト６には、薄い隙間があ
り、フロンＲ−113やフロリナート75といった冷媒15が
満されており、ポンプ７により外部冷却系統へ循環さ
せ、箔巻巻線内の発熱を冷媒の蒸発潜熱で奪う。その蒸
気を凝縮器８内において、水冷却９で冷却して凝縮させ
るという方式が公知としてある。更にこの液化した冷媒
を冷媒タンク14に貯め、ポンプ７で巻線内に送り込むと
いう冷媒循環冷却回路がとられる。すなわち、この冷媒
循環回路と変圧器とは分離されている。FIG. 1 shows the structure of a conventionally known foil winding transformer. The metal sheet 2 and the insulating sheet 3 are superposed on the outer side of the iron core 1, and the low-voltage winding 4 and the high-voltage winding 5 of a known foil winding method are wound, and the low-voltage and high-voltage windings 4 and 5 are respectively between the windings. The ring-shaped cooling duct 6 is built in. The cooling duct 6 has a thin gap and is filled with a refrigerant 15 such as CFC R-113 or Fluorinert 75, and is circulated to an external cooling system by a pump 7 to generate heat in the foil winding windings and to evaporate latent heat of the refrigerant. Take away with. It is known that the steam is cooled in the condenser 8 by the water cooling 9 and condensed. Further, a refrigerant circulation cooling circuit is provided in which the liquefied refrigerant is stored in the refrigerant tank 14 and fed into the winding by the pump 7. That is, the refrigerant circulation circuit and the transformer are separated.
集液砕10はステンレスなど金属で作られているが、それ
と冷却ダクト６を接続するためには絶縁パイプ11が用い
られ、集液管10はタンク12などのアース電位をとる。冷
却ダクト６の電位は巻線内に巻き込まれている関係上ほ
ぼ巻線と同じ電位に電気的に結合されている。The liquid collecting crusher 10 is made of metal such as stainless steel, but an insulating pipe 11 is used to connect it to the cooling duct 6, and the liquid collecting pipe 10 has a ground potential of the tank 12 or the like. The electric potential of the cooling duct 6 is electrically coupled to the same electric potential as that of the winding because it is wound in the winding.
巻線の絶縁はタンク12内に封入された絶縁油あるいはSF
6ガスといった絶縁媒体13で絶縁されている。The insulation of the winding is the insulating oil or SF filled in the tank 12.
It is insulated by an insulating medium 13 such as 6 gas.
なお、第１図において本発明と、直接関係のない巻線の
リード線や、それをタンクの外側に引き出すブッシング
などは省略してある。In FIG. 1, lead wires of windings that are not directly related to the present invention, bushings for drawing them out of the tank, etc. are omitted.
以上説明したような方式の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のための絶縁媒体13とは完全
に分離（セパレート）されているこのことから、この方
式の箔巻変圧器を特にここではセパレート式箔巻変圧器
と呼ぶことにする。In the foil wound transformer of the above-described system, the circulation circuit in which the refrigerant for cooling flows and the insulating medium 13 for insulation are completely separated (separated). The device is specifically referred to herein as a separate foil wound transformer.
セパレート式の箔巻変圧器は冷媒の蒸発潜熱を利用して
いるので、優れた冷却特性を期待できるので、大容量変
圧器には有望である。しかし、第１図に示すような従来
のセパレート式箔巻変圧器には、次の問題点がある。Since the separate type foil wound transformer uses the latent heat of vaporization of the refrigerant, it can be expected to have excellent cooling characteristics, so it is promising for large capacity transformers. However, the conventional separate type foil wound transformer as shown in FIG. 1 has the following problems.
大容量のセパレート式箔巻変圧器を冷却するために、フ
オンＲ−113，フロリナート75等の冷媒を内部に通した
冷却ダクトが多数取り付けられる。第１図に示されるよ
うなこの冷却ダクト６は中空に形成され、冷媒流路は仕
切り部で分割され、流体の経路と流量が均一に変化する
ように設計されている。In order to cool a large-capacity separate type foil wound transformer, a large number of cooling ducts through which a refrigerant such as Huon R-113 and Fluorinert 75 are passed are attached. This cooling duct 6 as shown in FIG. 1 is formed to be hollow, and the refrigerant flow path is divided by a partitioning portion so that the fluid path and the flow rate are uniformly changed.
この冷却ダクトは熱伝導率の高い金属材料で形成され、
箔巻線の金属シートと絶縁シートの層間に挿入される。
これらの冷却ダクトは絶縁パイプとの接続によって前記
発明の技術的背景で記述した冷媒の循環路を形成する。
従って冷却ダクトと絶縁パイプとの接続部（以下冷却ダ
クトの端部接続部分）は設計上、箔巻線端部外に位置す
る事から巻線間の導体に対する絶縁の問題、対地間
絶縁の問題、漏洩磁束によるうず電流損の問題を解決
する上でこの冷却ダクトの端部接続部を絶縁化する事が
望まれていた。This cooling duct is made of metal material with high thermal conductivity,
The foil winding is inserted between the metal sheet and the insulating sheet.
These cooling ducts form the circulation path of the refrigerant described in the technical background of the invention by connecting with the insulating pipe.
Therefore, since the connection between the cooling duct and the insulation pipe (hereinafter referred to as the end connection of the cooling duct) is located outside the foil winding end by design, there is a problem of insulation between conductors between windings and a problem of insulation between grounds. In order to solve the problem of eddy current loss due to leakage magnetic flux, it has been desired to insulate the end connecting portion of this cooling duct.
従来、この冷却ダクトの端部接続部分は母体を金属と
し、その表面を絶縁物でコーティング、テーピング等を
施こし、絶縁処理を行なっていた。この方法によれば、
上記問題のうち、巻線間の導体に対する絶縁、及び対地
間絶縁の問題は解決できるが、巻線導体に流れる電流に
よって発生する漏洩磁束分布により、冷却ダクトの端部
接続部分において、接続部分の金属導体の厚さの２乗に
比例する過電流損が発生し、この冷却ダクトの接続部分
では負荷電流による抵抗損と渦電流が加わって温度上昇
が起こっていた。特に大電流で大容量の箔巻変圧器では
大きな問題となっている。特に冷却効率を高める意味に
おいて、セパレート式箔巻変圧器では上記問題点は解決
しなければならない重要な課題であった。Conventionally, the end connecting portion of this cooling duct has a mother body made of metal, and its surface is coated with an insulating material, taping, etc., to perform an insulating treatment. According to this method
Among the above problems, the problem of insulation between conductors between windings and the problem of insulation between grounds can be solved, but due to the leakage flux distribution generated by the current flowing through the winding conductors, the connection of the connecting portion at the end connecting portion of the cooling duct An overcurrent loss was generated in proportion to the square of the thickness of the metal conductor, and a resistance loss due to a load current and an eddy current were added to the connection portion of this cooling duct to raise the temperature. In particular, it is a big problem in a foil winding transformer with a large current and a large capacity. Particularly, in the sense of increasing the cooling efficiency, the above-mentioned problems have been important problems to be solved in the separate type foil wound transformer.
本発明の目的は、以上示した従来技術の諸問題を取り除
くものであり、漏洩磁束による渦電流損の発生を防止
し、電気絶縁強度を向上させた信頼性の高い箔巻変圧器
を提供することを目的とする。An object of the present invention is to eliminate the above-mentioned problems of the prior art, and to provide a highly reliable foil wound transformer in which the occurrence of eddy current loss due to leakage magnetic flux is prevented and the electric insulation strength is improved. The purpose is to
本発明はセパレート式変圧器の冷却ダクトを箔巻線内に
組み込むに先立って、冷却ダクトの端部接続部分を電気
絶縁性、機械的強度特性、作業性の良好なセラミック無
機組成物で構成したことを特徴とする。According to the present invention, prior to incorporating the cooling duct of the separate type transformer into the foil winding, the end connecting portion of the cooling duct is made of a ceramic inorganic composition having good electric insulation, mechanical strength characteristics and workability. It is characterized by
以下この発明の一実施例について説明する。 An embodiment of the present invention will be described below.
第２図は冷却ダクトの斜視図である。点線は巻線端部の
位置を示した図である。斜線部(16)の冷却ダクト端部接
続部分(17)は巻線外の位置で巻回される巻線構成であ
る。この冷却ダクトの端部接続部は絶縁パイプ(11)と接
合され集液管へ通ずる。本発明においてはこの冷却ダク
ト端部接線部を、絶縁化する上で、セラミック組成物、
例えば、アルミナAl2O3シリカ(SiO2)、BeO,SiC，高強度
セラミックスとして知られている。窒化アルミナAlN，
窒化ケイ素、Si3N4を使用した。特に高絶縁性、熱伝導
性、機械的強度特性、耐腐食性、加工性等の点から考慮
すれば、窒化アルミナAlNが好ましい。FIG. 2 is a perspective view of the cooling duct. The dotted line is a diagram showing the positions of the winding ends. The cooling duct end connecting portion (17) of the shaded portion (16) has a winding structure wound at a position outside the winding. The end connecting portion of this cooling duct is joined to the insulating pipe (11) and communicates with the liquid collecting pipe. In the present invention, the cooling duct end tangential portion, in insulating, a ceramic composition,
For example, alumina Al 2 O 3 silica (SiO 2 ), BeO, SiC, and high strength ceramics are known. Alumina nitride AlN,
Silicon nitride and Si 3 N 4 were used. In particular, from the viewpoints of high insulation, thermal conductivity, mechanical strength properties, corrosion resistance, workability, etc., alumina nitride AlN is preferable.
以上のように本発明によれば、冷却ダクトの端部接続部
分が絶縁されることにより、電気絶縁に関連する諸問題
をクリアーでき、特に従来技術に比べ、漏洩磁束による
渦電流損をなくす事が可能である。従って冷却効率を著
しく高められ、高品質で高信頼性のセパレート型箔巻線
を提供することができる。As described above, according to the present invention, by insulating the end connecting portion of the cooling duct, various problems related to electrical insulation can be cleared, and in particular, eddy current loss due to leakage magnetic flux can be eliminated as compared with the conventional technology. Is possible. Therefore, the cooling efficiency can be remarkably enhanced, and a high quality and highly reliable separate type foil winding can be provided.
第１図は箔巻変圧器の構造を示す断面図、第２図は本発
明の一実施例による箔巻変圧器に用いる冷却ダクトの斜
視図である。 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……冷却ダクト、７
……ポンプ、８……凝縮器、９……水冷却、10……集液
管、11……絶縁パイプ、12……タンク、13……絶縁媒
体、14……冷媒タンク、15……冷媒、16……巻線端部位
置、17……冷却ダクトの端部接続部、FIG. 1 is a sectional view showing the structure of a foil wound transformer, and FIG. 2 is a perspective view of a cooling duct used in the foil wound transformer according to an embodiment of the present invention. 1 ... Iron core, 2 ... Metal sheet, 3 ... Insulation sheet, 4
...... Low voltage winding, 5 ...... High voltage winding, 6 ...... Cooling duct, 7
...... Pump, 8 …… Condenser, 9 …… Water cooling, 10 …… Collection pipe, 11 …… Insulation pipe, 12 …… Tank, 13 …… Insulation medium, 14 …… Refrigerant tank, 15 …… Refrigerant , 16 …… winding end position, 17 …… cooling duct end connection,
Claims (1)
ねて巻回してなる箔巻線内部に冷却ダクトを配置しその
冷却ダクトに冷媒を通す事によって、巻線を冷却する箔
巻変圧器において、前記冷却ダクトの冷媒送入口部分お
よび送出口部分をセラミック絶縁体で構成にした事を特
徴とする箔巻変圧器。1. A foil winding transformer which cools a winding by placing a cooling duct inside a foil winding formed by winding a metal sheet and an insulating sheet around an iron core and passing a refrigerant through the cooling duct. The foil winding transformer according to claim 1, wherein the refrigerant inlet port and outlet port of the cooling duct are made of a ceramic insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58178121A JPH0616453B2 (en) | 1983-09-28 | 1983-09-28 | Foil winding transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58178121A JPH0616453B2 (en) | 1983-09-28 | 1983-09-28 | Foil winding transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6072207A JPS6072207A (en) | 1985-04-24 |
| JPH0616453B2 true JPH0616453B2 (en) | 1994-03-02 |
Family
ID=16043016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58178121A Expired - Lifetime JPH0616453B2 (en) | 1983-09-28 | 1983-09-28 | Foil winding transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0616453B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0403374D0 (en) | 2004-02-16 | 2004-03-17 | Tesla Engineering Ltd | Cooling of coils in magnetic resonance imaging |
| JP4927059B2 (en) * | 2008-10-21 | 2012-05-09 | 日立建機株式会社 | Wood splitter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58204510A (en) * | 1982-05-24 | 1983-11-29 | Toshiba Corp | Transformer |
-
1983
- 1983-09-28 JP JP58178121A patent/JPH0616453B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58204510A (en) * | 1982-05-24 | 1983-11-29 | Toshiba Corp | Transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6072207A (en) | 1985-04-24 |
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