JPS639645B2 - - Google Patents
Info
- Publication number
- JPS639645B2 JPS639645B2 JP525681A JP525681A JPS639645B2 JP S639645 B2 JPS639645 B2 JP S639645B2 JP 525681 A JP525681 A JP 525681A JP 525681 A JP525681 A JP 525681A JP S639645 B2 JPS639645 B2 JP S639645B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage coil
- mold
- coil
- resin
- duct
- 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
- 239000011347 resin Substances 0.000 claims description 25
- 229920005989 resin Polymers 0.000 claims description 25
- 125000006850 spacer group Chemical group 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000010125 resin casting Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
-
- 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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
- H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
Description
【発明の詳細な説明】
本発明は樹脂注型用内型に低圧コイルと高圧コ
イルおよびダクト型を同心状に配置して一体と
し、これに外型を設け、樹脂含浸し、硬化するよ
うにした高低圧コイルの一体樹脂モールドコイル
の製造方法に関するものである。[Detailed Description of the Invention] The present invention consists of an inner mold for resin casting in which a low voltage coil, a high voltage coil, and a duct mold are arranged concentrically and integrated, an outer mold is provided on this, the resin is impregnated with the mold, and the duct mold is cured. The present invention relates to a method for manufacturing an integral resin molded high-low voltage coil.
従来、モールド変圧器に用いる樹脂モールドコ
イルは、高圧コイルおよび低圧コイルを別々に巻
回し、別々に金型にセツトし、樹脂を含浸硬化し
ていた。そのため、コイルを注型するのに手間が
増加するとともに、変圧器組立時、鉄心にコイル
を装備するのに各々別々に装備し固定する必要が
あり、機器組立時も手間を要し、工数のかかるも
のであつた。また電力用変圧器のように大型コイ
ルの場合、高圧コイルと低圧コイルを一体に注型
することは困難であつた。それは樹脂が硬化する
時、反応熱により樹脂内部の硬化反応が不均一に
なり、樹脂層にクラツクが発生した。特に高圧コ
イルと低圧コイルとの間の高低圧絶縁層を形成す
る主絶縁層部分にクラツクあるいは剥離が発生し
ていた。これは、前記主絶縁層の樹脂が硬化時、
高圧コイルおよび低圧コイルに各々引張られた状
態で引張り応力が発生するためである。 Conventionally, resin molded coils used in molded transformers have been made by winding a high-voltage coil and a low-voltage coil separately, setting them in separate molds, and impregnating and hardening them with resin. Therefore, it takes more time to cast the coils, and when assembling the transformer, each coil needs to be installed and fixed separately on the core, which requires more time and effort when assembling the equipment. It was something like that. Furthermore, in the case of large coils such as power transformers, it is difficult to cast the high voltage coil and the low voltage coil together. When the resin was cured, the heat of reaction caused the curing reaction inside the resin to become uneven, causing cracks in the resin layer. In particular, cracks or peeling occurred in the main insulating layer forming the high-low voltage insulating layer between the high-voltage coil and the low-voltage coil. This is because when the resin of the main insulating layer is cured,
This is because tensile stress is generated in the high-voltage coil and the low-voltage coil when they are each stretched.
本発明は上記欠点を解消し、絶縁信頼性の高い
高低圧コイルの一体注型した樹脂モールドコイル
を製造する方法を提供するものであり、底板付内
型に低圧コイルを装備し、そして低圧コイル外周
にダクト型を装備し、さらにこのダクト型外周に
非接着性の絶縁セパレーターを巻回装備し、その
後、複数個に分割された素コイルを段積みして高
圧コイルとし、低圧コイルと同心状に設置して、
内型，低圧コイル，ダクト型，高圧コイルを一体
とし、外型にセツトし、樹脂含浸し硬化するよう
にして、高低圧コイルを一体注型するものであ
る。 The present invention eliminates the above-mentioned drawbacks and provides a method for manufacturing a resin molded coil in which high and low voltage coils with high insulation reliability are integrally cast. A duct type is equipped on the outer periphery, and a non-adhesive insulating separator is wound around the duct type outer periphery.Then, the raw coils divided into multiple pieces are stacked to form a high voltage coil, which is concentric with the low voltage coil. Install it in
The inner mold, low voltage coil, duct mold, and high voltage coil are integrated, set in the outer mold, impregnated with resin and cured, and the high and low voltage coil is integrally cast.
次に本発明の実施例を図面と共に説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第１図，第２図において、１は鋼材あるいは離
型性の良い樹脂材を用いて製作されたモールドコ
イルの樹脂注型用の金型、２は金型１の内型であ
り、底板３が一体に取り付けられている。４は容
器状に形成した外型であり、上部は空間となつて
おり、内型２の底板３が当接した状態でセツトさ
れている。５は低圧コイルであり、第１の絶縁ス
ペーサー６で外型４と所定の空間を設けている。
７は金型１の一部を構成するダクト型であり、実
施例では５本で構成されており、低圧コイル５と
所定の空間を保ち、内型２の底板３に当接されて
設けられている。８はダクト型７の外周に巻回装
着されている非接着性の絶縁セパレーターであ
り、テフロンシート，ポリエステルシート，シリ
コンゴムシート，アラミツド紙等の絶縁シートで
形成されている。９は素コイル１０を第２の絶縁
スペーサー１１で所定の空間を保つて段積みされ
た高圧コイルであり、第３の絶縁スペーサー１２
で内型２の底板３に所定の間隔でセツトされてい
る。１３は注型樹脂である。 In FIGS. 1 and 2, 1 is a mold for resin casting of a molded coil manufactured using a steel material or a resin material with good mold releasability, 2 is an inner mold of the mold 1, and a bottom plate 3 is attached as one piece. Reference numeral 4 denotes an outer mold formed in the shape of a container, the upper part of which is a space, and the bottom plate 3 of the inner mold 2 is set in contact with the outer mold. 5 is a low voltage coil, and a predetermined space is provided between it and the outer mold 4 by a first insulating spacer 6.
A duct type 7 constitutes a part of the mold 1, and in the embodiment, it is composed of five ducts, and is provided in contact with the bottom plate 3 of the inner mold 2 while maintaining a predetermined space with the low voltage coil 5. ing. A non-adhesive insulating separator 8 is wound around the outer periphery of the duct mold 7, and is made of an insulating sheet such as a Teflon sheet, a polyester sheet, a silicone rubber sheet, or an aramid paper. Reference numeral 9 denotes a high-voltage coil in which an elementary coil 10 is stacked with a predetermined space maintained by a second insulating spacer 11, and a third insulating spacer 12
They are set on the bottom plate 3 of the inner mold 2 at predetermined intervals. 13 is a casting resin.
次にこの実施例の製造方法について説明する。 Next, the manufacturing method of this example will be explained.
適宜な巻芯を用いて巻回された低圧コイル５を
内型２に挿入し、絶縁スペーサー６を介して内型
２の底板３上にセツトする。そして低圧コイル５
の外周に適宜な空間を設けてダクト型７を内型２
の底板３にセツトする。そしてダクト型７の外周
に非接着性の絶縁性セパレーター８を巻回して設
ける。そしてあらかじめ適宜な巻芯で巻回され製
作された素コイル１０を絶縁スペーサー１１を介
して段積みして形成した高圧コイル９を内型２に
低圧コイル５と同心状に設置し、絶縁スペーサー
１２で内型２の底板３と所定の寸法を保つ。そし
て内型２，低圧コイル５，ダクト型７，絶縁セパ
レータ７、高圧コイル９を一体として、容器状の
外型４に挿入セツトする。そして外型４の上部空
間より樹脂を含浸し、加熱硬化する。そして最後
に外型４，内型２，ダクト型７を離型して高低圧
コイル間に冷却用ダクト１４を形成した高低圧コ
イル一体樹脂モールドコイルを得る。ここで高圧
コイル９はあらかじめ段積みしたものを内型２に
セツトするとしたが、次のような方法も可能であ
る。内型２に絶縁スペーサー１２をセツトし、素
コイル１０を絶縁スペーサー１１を介して段積み
し、そして内型２にセツトしてから素コイル１０
間のリード線を接続して高圧コイル９を完成させ
る。 A low voltage coil 5 wound using a suitable core is inserted into the inner mold 2 and set on the bottom plate 3 of the inner mold 2 via an insulating spacer 6. and low voltage coil 5
The duct mold 7 is connected to the inner mold 2 by providing an appropriate space around the outer periphery of the duct mold 7.
Set it on the bottom plate 3 of the Then, a non-adhesive insulating separator 8 is wound around the outer periphery of the duct mold 7. Then, a high-voltage coil 9 formed by stacking raw coils 10, which have been manufactured by winding them with suitable cores in advance, are stacked with an insulating spacer 11 in between, is installed in the inner mold 2 concentrically with the low-voltage coil 5, and the insulating spacer 12 to maintain the specified dimensions with the bottom plate 3 of the inner mold 2. Then, the inner mold 2, low-voltage coil 5, duct mold 7, insulating separator 7, and high-voltage coil 9 are inserted and set into a container-shaped outer mold 4 as one body. Then, resin is impregnated from the upper space of the outer mold 4 and cured by heating. Finally, the outer mold 4, the inner mold 2, and the duct mold 7 are released to obtain a resin-molded high-low voltage coil with a cooling duct 14 formed between the high and low voltage coils. Here, it is assumed that the high voltage coils 9 are stacked in advance and set in the inner mold 2, but the following method is also possible. The insulating spacer 12 is set in the inner mold 2, the raw coils 10 are stacked via the insulating spacer 11, and after being set in the inner mold 2, the raw coils 10 are stacked.
The high voltage coil 9 is completed by connecting the lead wires between them.
また非接着性の絶縁セパレーター８は低圧コイ
ル５の外周上に巻回装着しても良い。 Further, the non-adhesive insulating separator 8 may be wound around the outer periphery of the low voltage coil 5.
以上のように本発明の樹脂モールドコイルの製
造方法によれば、底板付の内型に低圧コイル、ダ
クト型、高圧コイルを一体とし外型にセツトして
含浸硬化することにより、従来のように高低圧コ
イルを別々に注型するという手間及び変圧器組立
時のコイル装着手間を省くことができ、工数が大
巾に低減できる。また、高圧コイルと低圧コイル
間に含浸樹脂と接着しない絶縁セパレーターが介
されているので、樹脂硬化時、高低圧コイル間の
樹脂の応力発生が抑制されるのでクラツクあるい
は剥離の発生の恐れが全くない。すなわち、低圧
コイル側と高圧コイル側の含浸樹脂がセパレータ
ーにより別々に硬化するためである。 As described above, according to the method for manufacturing a resin molded coil of the present invention, a low voltage coil, a duct type, and a high voltage coil are integrated into an inner mold with a bottom plate, and the coil is set in an outer mold and impregnated and hardened. It is possible to eliminate the trouble of casting high and low voltage coils separately and the trouble of installing the coils when assembling the transformer, and the number of man-hours can be greatly reduced. In addition, since an insulating separator that does not adhere to the impregnated resin is interposed between the high-voltage coil and the low-voltage coil, stress generation in the resin between the high- and low-voltage coils is suppressed when the resin hardens, so there is no risk of cracking or peeling. do not have. That is, this is because the impregnated resins on the low-voltage coil side and the high-voltage coil side are cured separately by the separator.
また高圧コイルにはレ ー間の耐電圧を考慮し
て数分割した素コイルを段積みして製作されるが
内型に素コイルを段積みしながら装着でき、特別
の治具が不要にできる。 In addition, high-voltage coils are manufactured by stacking several divided coils in consideration of the withstand voltage between wires, but the coils can be stacked and installed in the inner mold, eliminating the need for special jigs. .
上記の如く従来困難とされていた大型コイルの
高低圧コイルを一体注型することが容易にできる
とともに絶縁信頼性の高い樹脂モールドコイルが
得られ、その工業的価値顕著なるものがある。 As mentioned above, it is easy to integrally cast a large high/low voltage coil, which has been considered difficult in the past, and a resin molded coil with high insulation reliability can be obtained, which has remarkable industrial value.
第１図は本発明の樹脂モールドコイルの製造方
法を示す断面図、第２図は本発明の製造方法によ
り得られる樹脂モールドコイルの斜視図である。
２……内型、３……底板、４……外型、５……
低圧コイル、６……第１の絶縁スペーサー、７…
…ダクト型、８……絶縁スパレーター、９……高
圧コイル、１０……素コイル、１１……第２の絶
縁スペーサー、１２……第３の絶縁スペーサー、
１３……注型樹脂。
FIG. 1 is a sectional view showing the method of manufacturing a resin molded coil of the present invention, and FIG. 2 is a perspective view of the resin molded coil obtained by the manufacturing method of the present invention. 2...Inner mold, 3...Bottom plate, 4...Outer mold, 5...
Low voltage coil, 6...first insulating spacer, 7...
... Duct type, 8 ... Insulating spallator, 9 ... High voltage coil, 10 ... Plain coil, 11 ... Second insulating spacer, 12 ... Third insulating spacer,
13...Casting resin.
Claims (1)
の絶縁スペーサーを介して低圧コイルを装備する
工程、および低圧コイル外周に所定間隔を設けて
前記底板にダクト型を複数本装着するとともに前
記ダクト型の外周に含浸樹脂と非接着性を有する
絶縁セパレーターを巻回装着する工程、および前
記内型の底板に、第２の絶縁スペーサーを介して
素コイルを段積みして形成した高圧コイルを第３
の絶縁スペーサーを介して装備する工程より成
り、前記低圧コイル，ダクト型，絶縁セパレータ
ー、絶縁スペーサ、及び高圧コイルを内型に一体
とし、容器状に組立てられた外型に装備し、樹脂
と含浸し、硬化することを特徴とする樹脂モール
ドコイルの製造方法。1. A process of equipping an inner mold with a bottom plate for resin casting with a low voltage coil via a first insulating spacer on the bottom plate, and installing a plurality of duct molds on the bottom plate with predetermined intervals around the outer circumference of the low voltage coil. At the same time, a step of winding and mounting an insulating separator having impregnated resin and non-adhesive properties around the outer periphery of the duct mold, and a high voltage formed by stacking raw coils on the bottom plate of the inner mold via a second insulating spacer. 3rd coil
The low-voltage coil, duct type, insulating separator, insulating spacer, and high-voltage coil are integrated into an inner mold, and the outer mold assembled into a container shape is equipped with the low-voltage coil, duct mold, insulating separator, insulating spacer, and high-voltage coil, and is impregnated with resin. A method for manufacturing a resin molded coil, characterized in that the coil is cured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP525681A JPS57118618A (en) | 1981-01-16 | 1981-01-16 | Manufacture of resin molded coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP525681A JPS57118618A (en) | 1981-01-16 | 1981-01-16 | Manufacture of resin molded coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57118618A JPS57118618A (en) | 1982-07-23 |
| JPS639645B2 true JPS639645B2 (en) | 1988-03-01 |
Family
ID=11606136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP525681A Granted JPS57118618A (en) | 1981-01-16 | 1981-01-16 | Manufacture of resin molded coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57118618A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6276513A (en) * | 1985-09-27 | 1987-04-08 | 利昌工業株式会社 | High voltage capacitor |
| US7023312B1 (en) | 2001-12-21 | 2006-04-04 | Abb Technology Ag | Integrated cooling duct for resin-encapsulated distribution transformer coils |
| EP2449564A1 (en) | 2009-06-30 | 2012-05-09 | ABB Technology AG | Dry type transformer with improved cooling |
-
1981
- 1981-01-16 JP JP525681A patent/JPS57118618A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57118618A (en) | 1982-07-23 |
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