JPS6260801B2 - - Google Patents
Info
- Publication number
- JPS6260801B2 JPS6260801B2 JP54014450A JP1445079A JPS6260801B2 JP S6260801 B2 JPS6260801 B2 JP S6260801B2 JP 54014450 A JP54014450 A JP 54014450A JP 1445079 A JP1445079 A JP 1445079A JP S6260801 B2 JPS6260801 B2 JP S6260801B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- layer
- mica
- semiconducting
- insulating layer
- 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
- 238000004804 winding Methods 0.000 claims description 46
- 239000010445 mica Substances 0.000 claims description 19
- 229910052618 mica group Inorganic materials 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 238000009413 insulation Methods 0.000 description 6
- 239000011800 void material Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F2027/329—Insulation with semiconducting layer, e.g. to reduce corona effect
Landscapes
- Insulating Of Coils (AREA)
- Transformers For Measuring Instruments (AREA)
Description
【発明の詳細な説明】
この発明はエポキシ樹脂等の合成樹脂でモール
ドした乾式の樹脂モールド形計器用変成器に係
り、特に樹脂モールド形計器用変成器の一次巻線
および二次巻線と主絶縁層との間における絶縁の
改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dry resin molded instrument transformer molded with synthetic resin such as epoxy resin, and particularly relates to a primary winding, a secondary winding, and a main winding of a resin molded instrument transformer. This invention relates to improving the insulation between the insulation layer and the insulation layer.
従来のモールド変成器は、一般にポリエステル
等の合成フイルムを巻回して形成された主絶縁層
を介して一次巻線と二次巻線との同心状に配置す
るようにそれぞれ巻回し、これを金型などを用い
てエポキシ樹脂などの合成樹脂を含浸もしくは注
型して形成される。 In conventional molded transformers, the primary and secondary windings are wound concentrically through a main insulating layer formed by winding a synthetic film such as polyester. It is formed by impregnating or casting synthetic resin such as epoxy resin using a mold.
ところで、従来この種のモールド変成器におい
ては一次巻線あるいは一次巻線の素線と主絶縁層
との間に合成樹脂が完全に含浸もしくは注型され
ず、空隙が残ることが多かつた。特に、一次巻線
は二次巻線にくらべて素線線径が細いために一次
巻線と主絶縁層との界面においては前記空隙が残
留する傾向が著しかつた。 By the way, in conventional molded transformers of this type, the synthetic resin is not completely impregnated or cast between the primary winding or the strands of the primary winding and the main insulating layer, and gaps often remain. In particular, since the diameter of the strands of the primary winding is smaller than that of the secondary winding, there is a marked tendency for the voids to remain at the interface between the primary winding and the main insulating layer.
このように、合成樹脂が完全に含浸または注型
されず、空隙が残つた場合、その空隙で部分放電
が生じやすくなる。また、一般にエポキシなどの
合成樹脂はマイカなどの無機材料にくらべて部分
放電特性が劣るので、この部分放電が累積すると
巻線の素線絶縁あるいは主絶縁層が放電劣化をき
たし、遂には絶縁破壊して線間短絡あるいは一次
二次間短絡などの短絡を生じ、大きな事故に結び
つくという欠点があつた。このようなことから、
今迄に種々な改良がなされているが、十分満足で
きるものが得られなかつた。即ち、主絶縁層に部
分放電特性が良好なマイカを用いる方法もある
が、周知のようにマイカは高価なことから樹脂モ
ールド形変成器が高価になる欠点があつた。 In this way, if the synthetic resin is not completely impregnated or cast and voids remain, partial discharge is likely to occur in those voids. In addition, synthetic resins such as epoxy generally have inferior partial discharge characteristics compared to inorganic materials such as mica, so when these partial discharges accumulate, the wire insulation or the main insulation layer of the winding will deteriorate due to discharge, eventually leading to dielectric breakdown. This had the disadvantage of causing short circuits such as line-to-line short circuits or primary-to-secondary short circuits, leading to major accidents. From such a thing,
Various improvements have been made up to now, but none have been fully satisfactory. That is, there is a method of using mica, which has good partial discharge characteristics, for the main insulating layer, but as is well known, mica is expensive, so it has the disadvantage that the resin mold type transformer becomes expensive.
この発明は上記欠点に鑑みてなされたもので一
次巻線および二次巻線と主絶縁層との間に半導電
層とマイカ層を設けることにより、上述した種々
の欠点を除去しようとするものである。 This invention was made in view of the above-mentioned drawbacks, and attempts to eliminate the various drawbacks mentioned above by providing a semiconducting layer and a mica layer between the primary winding, the secondary winding, and the main insulating layer. It is.
以下、この発明の一実施例を第１図に従つて説
明する。第１図において、一次巻線２および二次
巻線３の主絶縁層１側表面にそれぞれ半導電層５
ａ，５ｂを介してマイカ層６ａ，６ｂを設けてな
るものである。 An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, semiconducting layers 5 are formed on the surfaces of the primary winding 2 and the secondary winding 3 on the main insulating layer 1 side, respectively.
Mica layers 6a and 6b are provided with layers a and 5b interposed therebetween.
なお、上記マイカ層６ａ，６ｂは一般に使用さ
れている集成マイカシートを１回巻回したもので
あるが、マイカの種類および巻回数などは特に限
定されるものではない。また、半導電層５は103
〜106Ω・cmの抵抗率を有するカーボン紙を１回
巻回して構成したものであるが、抵抗率および巻
回数などは特に限定されるものではない。 The mica layers 6a and 6b are formed by winding a commonly used mica sheet assembly once, but the type of mica and the number of windings are not particularly limited. Moreover, the semiconducting layer 5 is 10 3
Although it is constructed by winding carbon paper having a resistivity of ~10 6 Ω·cm once, the resistivity and number of windings are not particularly limited.
以上のように構成したこの発明によれば、半導
電層５ａ，５ｂおよびマイカ層６ａ，６ｂは主絶
縁層１に使用されているポリエステルフイルムに
比べて非常にポーラスな材料であることから、一
次巻線２および二次巻線３の素線界面への合成樹
脂の含浸性が向上し、当該一次巻線２および二次
巻線３の素線と半導電層５ａ，５ｂとの界面にお
ける残留空隙が減少する。また、半導電層５ａ，
５ｂは一次巻線２と二次巻線３との間における分
圧電極となり、一次巻線２と半導電層５ａ、二次
巻線３と半導電層５ｂとの間のそれぞれの静電容
量は半導電層５ａと５ｂとの間の静電容量に比べ
て非常に大きくなる。したがつて、前記一次巻線
２と半導電層５ａ、二次巻線３と半導電層５ｂと
の間の分担電圧が小さくなることから、一次巻線
２と二次巻線３のそれぞれの素線界面に微小な空
隙が残留していても、部分放電が生じなくなる。
さらに、一次巻線２と二次巻線３のそれぞれの素
線と半導電層５ａ，５ｂとの間に空隙が残留した
場合、空隙に微小な部分放電が生じても、部分放
電特性が良好なマイカ層６ａ，６ｂを設けている
ので、主絶縁層１への部分放電による放電劣化の
侵食を防止することができる。すなわち、主絶縁
層１の絶縁厚さを薄くして従来例と同じ部分放電
寿命特性の樹脂モールド変成器を得ることができ
る。 According to the present invention configured as described above, since the semiconducting layers 5a, 5b and the mica layers 6a, 6b are made of a material that is much more porous than the polyester film used for the main insulating layer 1, Impregnation of the synthetic resin into the wire interfaces of the windings 2 and secondary windings 3 is improved, and no residue remains at the interfaces between the wires of the primary windings 2 and secondary windings 3 and the semiconducting layers 5a and 5b. Voids are reduced. Moreover, the semiconducting layer 5a,
5b is a voltage dividing electrode between the primary winding 2 and the secondary winding 3, and the capacitance between the primary winding 2 and the semiconducting layer 5a and between the secondary winding 3 and the semiconducting layer 5b is is much larger than the capacitance between semiconducting layers 5a and 5b. Therefore, the voltages shared between the primary winding 2 and the semiconducting layer 5a and between the secondary winding 3 and the semiconducting layer 5b become smaller, so that each of the primary winding 2 and the secondary winding 3 Partial discharge will no longer occur even if minute voids remain at the wire interface.
Furthermore, if a gap remains between each strand of the primary winding 2 and the secondary winding 3 and the semiconducting layers 5a and 5b, even if a minute partial discharge occurs in the gap, the partial discharge characteristics are good. Since the mica layers 6a and 6b are provided, it is possible to prevent discharge degradation caused by partial discharge to the main insulating layer 1. That is, by reducing the insulation thickness of the main insulating layer 1, it is possible to obtain a resin molded transformer having the same partial discharge life characteristics as the conventional example.
このようなことから、この発明によれば一次巻
線２および二次巻線３のそれぞれの素線界面への
合成樹脂の含浸性が向上し、半導電層５ａ，５ｂ
を設けたことにより前記素線界面に残留空隙が生
じた場合でも当該残留空隙での部分放電が減少
し、さらに、マイカ層６ａ，６ｂを設けたことに
より前記残留空隙での部分放電寿命特性が向上す
る。したがつて、線間短絡あるいは一次二次間短
絡の事故を防止でき、安価で小型の樹脂モールド
形変成器を提供することができる。 Therefore, according to the present invention, the impregnation of the synthetic resin into the wire interfaces of each of the primary winding 2 and the secondary winding 3 is improved, and the semiconducting layers 5a, 5b are improved.
By providing the mica layers 6a and 6b, even if a residual void occurs at the strand interface, partial discharge in the residual void is reduced, and furthermore, by providing the mica layers 6a and 6b, the partial discharge life characteristic in the residual void is reduced. improves. Therefore, accidents such as line-to-line short circuits or primary-to-secondary short circuits can be prevented, and an inexpensive and small resin molded transformer can be provided.
なお、上述したこの発明の他の実施例として第
２図に示す様な構成をとつても同様の効果を奏す
る。すなわち、第１図に示した基本的な一実施例
の構成に、一次巻線２および二次巻線３のそれぞ
れ素線と半導電層５ａ，５ｂとの間にマイカ層７
ａ，７ｂをそれぞれ設けたものである。 It should be noted that the same effect can be obtained by using a configuration as shown in FIG. 2 as another embodiment of the present invention described above. That is, in the configuration of the basic embodiment shown in FIG.
a and 7b are provided respectively.
このような構成によれば、一次巻線２と半導電
層５ａ、二次巻線３と半導電層５ｂとの間のそれ
ぞれの分担電圧は上昇するが、マイカ層７ａ，７
ｂをそれぞれ設けたことにより、合成樹脂の含浸
性がさらに向上し、また部分放電寿命特性が向上
する効果がある。 According to such a configuration, the respective shared voltages between the primary winding 2 and the semiconducting layer 5a and between the secondary winding 3 and the semiconducting layer 5b increase, but the mica layers 7a, 7
By providing each of b, the impregnating property of the synthetic resin is further improved, and the partial discharge life characteristics are also improved.
以上のようにこの発明は、一次巻線および二次
巻線の主絶縁層側の表面に半導電層を介してマイ
カ層を設けたことにより、素線の素線界面での空
隙の残留を減少できると共に、半導電層による素
線界面付近の電界緩和ができ、さらにマイカ層に
よる部分放電寿命特性が向上するなどの相乗効果
が得られ、安価で且つ小型の電気的に非常に優秀
な特性を有する樹脂モールド形変成器を提供でき
る。 As described above, the present invention provides a mica layer on the main insulating layer side surface of the primary winding and the secondary winding with a semiconducting layer interposed therebetween. In addition to being able to reduce the electric field near the wire interface by the semiconducting layer, it also has synergistic effects such as improving the partial discharge life characteristics by the mica layer, and is inexpensive, compact, and has extremely excellent electrical properties. It is possible to provide a resin mold type transformer having the following.
第１図はこの発明の一実施例を示す樹脂モール
ド形変成器のモールドコイル部分断面図、第２図
はこの発明の他の実施例を示す樹脂モールド形変
成器のモールドコイル部分断面図である。
図において、１は主絶縁層、２は一次巻線、３
は二次巻線、５ａ，５ｂは半導電層、６ａ，６ｂ
および７ａ，７ｂはマイカ層である。なお、図中
同一符号は同一部分を示す。
FIG. 1 is a partial sectional view of a molded coil of a resin molded transformer showing one embodiment of the present invention, and FIG. 2 is a partial sectional view of a molded coil of a resin molded transformer showing another embodiment of the invention. . In the figure, 1 is the main insulating layer, 2 is the primary winding, and 3
is a secondary winding, 5a, 5b are semiconducting layers, 6a, 6b
and 7a, 7b are mica layers. Note that the same reference numerals in the figures indicate the same parts.
Claims (1)
同心状に配置し、合成樹脂を含浸もしくは注型し
て成る樹脂モールド形変成器において、上記一次
および二次巻線の主絶縁層側の表面に半導電層を
介してマイカ層を設けたことを特徴とする樹脂モ
ールド形変成器。 ２ 上記マイカ層を上記主導電層の各巻線側にそ
れぞれ設けられた他のマイカ層を介して設けたこ
とを特徴とする特許請求の範囲第１項記載の樹脂
モールド形変成器。[Scope of Claims] 1. In a resin mold type transformer in which a primary winding and a secondary winding are arranged concentrically with a main insulating layer interposed therebetween and impregnated or cast with synthetic resin, the primary and secondary windings are A resin mold type transformer characterized in that a mica layer is provided on the surface of the winding on the main insulating layer side with a semiconducting layer interposed therebetween. 2. The resin mold type transformer according to claim 1, wherein the mica layer is provided through another mica layer provided on each winding side of the main conductive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1445079A JPS55107219A (en) | 1979-02-09 | 1979-02-09 | Resin mold type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1445079A JPS55107219A (en) | 1979-02-09 | 1979-02-09 | Resin mold type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55107219A JPS55107219A (en) | 1980-08-16 |
| JPS6260801B2 true JPS6260801B2 (en) | 1987-12-18 |
Family
ID=11861361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1445079A Granted JPS55107219A (en) | 1979-02-09 | 1979-02-09 | Resin mold type transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55107219A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5864004A (en) * | 1981-10-14 | 1983-04-16 | Fuji Electric Corp Res & Dev Ltd | Resin molded coil |
| US6177848B1 (en) * | 1998-12-30 | 2001-01-23 | Square D Company | High frequency snubber for transformers |
| KR100808609B1 (en) | 2006-03-16 | 2008-02-28 | 영화산업전기 주식회사 | Voltage transformer for metering of high reliability |
| KR100822345B1 (en) * | 2007-06-01 | 2008-04-16 | 영화산업전기 주식회사 | Voltage/current transformer for metering |
| KR100761008B1 (en) * | 2007-06-01 | 2007-09-21 | 영화산업전기 주식회사 | molding method of Voltage/current transformer for metering and power supply |
| KR100822350B1 (en) * | 2007-06-01 | 2008-04-16 | 영화산업전기 주식회사 | Voltage/current transformer for metering |
| KR100761007B1 (en) * | 2007-06-01 | 2007-09-21 | 영화산업전기 주식회사 | Voltage/current transformer for metering |
| KR100769640B1 (en) * | 2007-07-09 | 2007-10-23 | 영화산업전기 주식회사 | molding method of Voltage transformer for metering of high reliability |
| JP2017055042A (en) * | 2015-09-11 | 2017-03-16 | 三菱電機株式会社 | Transformer |
| JP6519497B2 (en) * | 2016-02-18 | 2019-05-29 | 三菱電機株式会社 | Instrument transformer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4331459Y1 (en) * | 1965-06-26 | 1968-12-20 | ||
| JPS5295052A (en) * | 1976-02-06 | 1977-08-10 | Hitachi Ltd | Annular coil |
-
1979
- 1979-02-09 JP JP1445079A patent/JPS55107219A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4331459Y1 (en) * | 1965-06-26 | 1968-12-20 | ||
| JPS5295052A (en) * | 1976-02-06 | 1977-08-10 | Hitachi Ltd | Annular coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55107219A (en) | 1980-08-16 |
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