JPH0312447B2 - - Google Patents
Info
- Publication number
- JPH0312447B2 JPH0312447B2 JP59221462A JP22146284A JPH0312447B2 JP H0312447 B2 JPH0312447 B2 JP H0312447B2 JP 59221462 A JP59221462 A JP 59221462A JP 22146284 A JP22146284 A JP 22146284A JP H0312447 B2 JPH0312447 B2 JP H0312447B2
- Authority
- JP
- Japan
- Prior art keywords
- metallized
- film
- films
- dielectric film
- vapor deposition
- 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
- 239000003990 capacitor Substances 0.000 claims description 29
- 239000010408 film Substances 0.000 claims description 25
- 239000011104 metalized film Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 238000007740 vapor deposition Methods 0.000 claims description 11
- 239000002985 plastic film Substances 0.000 claims description 9
- 229920006255 plastic film Polymers 0.000 claims description 9
- 229920005992 thermoplastic resin Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000011888 foil Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【発明の詳細な説明】
〔発明の目的〕
本発明は電気回路の力率改善用などに使用され
る巻回型プラスチツクフイルムコンデンサに関す
るものである。この種のコンデンサは耐電圧特性
を向上するために、コンデンサ素子の内部に複数
個の容量を直列に形成するよう構成されている場
合が多い。第３図はその従来例で、帯状の誘電体
フイルム１ａ，１ｂの上に、一定の間隔をおいて
島状の金属箔電極２ａ，２ｂを２ｂが隣接する２
ａと２ａの双方と相対向するよう電気的に分離し
て配置し、両端の金属箔電極２ａ，２ｂにそれぞ
れリード線３ａ，３ｂを設けて巻回して構成して
いる。第４図はその等価回路図で、リード線３ａ
と３ｂとの間には容量C1〜C5が直列に形成され、
印加電圧はV1〜V5に分割されて誘電体フイルム
に印加されるのでコンデンサ素子の耐圧性を向上
することができる。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] The present invention relates to a wound plastic film capacitor used for improving the power factor of an electric circuit. This type of capacitor is often configured such that a plurality of capacitors are formed in series inside a capacitor element in order to improve withstand voltage characteristics. FIG. 3 shows a conventional example of this, in which island-shaped metal foil electrodes 2a, 2b are placed on strip-shaped dielectric films 1a, 1b at regular intervals, and 2b are adjacent to each other.
The metal foil electrodes 2a and 2a are electrically separated from each other so as to face each other, and lead wires 3a and 3b are provided and wound around the metal foil electrodes 2a and 2b at both ends, respectively. Figure 4 is an equivalent circuit diagram of the lead wire 3a.
Capacitors C 1 to C 5 are formed in series between and 3b.
Since the applied voltage is divided into V 1 to V 5 and applied to the dielectric film, the voltage resistance of the capacitor element can be improved.
しかし、この構造は、金属箔電極２ａ，２ｂの
端部に電界が集中し、かつこの電極端部は誘電体
フイルムにくい込んでいるので誘電体フイルムの
絶縁破壊を生じ易い欠点がある。そこでこの金属
箔電極に代る電極として誘電体フイルムの表面に
金属を蒸着して形成する蒸着電極を採用すること
が提案されている。第５図は誘電体フイルム１
ａ，１ｂの表面に蒸着電極４ａ，４ｂを形成した
プラスチツクフイルムコンデンサの素子を示して
いる。ところでこのコンデンサ素子を巻回して構
成するコンデンサは内部放電の防止、リード線の
補強、耐湿性の向上等のためにエポキシ樹脂等の
熱硬化性樹脂の含浸が行なわれるが、含浸剤（エ
ポキシ樹脂）が蒸着電極に浸潤するとその硬化時
の収縮によつて蒸着電極に亀裂を生じ、静電容量
の低下、電界の不均一等、コンデンサにとつて最
も好ましくない現象を生ずる。本発明はこのよう
な現象の生ずるおそれのない巻回型プラスチツク
フイルムコンデンサを提供することを目的とする
ものである。 However, this structure has the drawback that the electric field is concentrated at the ends of the metal foil electrodes 2a, 2b, and the ends of the electrodes are embedded in the dielectric film, which tends to cause dielectric breakdown of the dielectric film. Therefore, it has been proposed to use a vapor-deposited electrode formed by vapor-depositing metal on the surface of a dielectric film as an electrode in place of the metal foil electrode. Figure 5 shows dielectric film 1.
A plastic film capacitor element is shown in which vapor-deposited electrodes 4a and 4b are formed on the surfaces of electrodes 4a and 1b. By the way, capacitors made by winding capacitor elements are impregnated with a thermosetting resin such as epoxy resin to prevent internal discharge, reinforce lead wires, and improve moisture resistance. ) infiltrates into the vapor deposited electrode, the vapor deposited electrode cracks due to shrinkage during curing, resulting in the most unfavorable phenomena for capacitors, such as a decrease in capacitance and non-uniform electric field. It is an object of the present invention to provide a wound plastic film capacitor which is free from such a phenomenon.
本発明の巻回型プラスチツクフイルムコンデン
サは、帯状の誘電体フイルムの長手方向に一定の
間隔をおいて絶縁された島状の複数個の蒸着電極
を形成した２枚の金属化フイルムと、熱可塑性樹
脂を塗着して形成した樹脂層を有する２枚の誘電
体フイルムとを交互に積層して巻回した構造にお
いて、前記誘電体フイルムの樹脂層は前記２枚の
金属化フイルムの蒸着電極に密接し、前記２枚の
金属化フイルムの蒸着電極は、その一方の金属化
フイルムの蒸着電極が他方の金属化フイルムの隣
接する蒸着電極の双方と対向していることを特徴
とする。本発明のプラスチツクフイルムコンデン
サは以上の構成を有するので樹脂層を形成する熱
可塑性樹脂の融点又は軟化点より高い温度で加熱
してこれを溶融又は軟化させ、蒸着電極と誘電体
フイルムとを完全に密着させて固化することによ
つて含浸剤が蒸着金属に浸潤するのを防止する。
The wound plastic film capacitor of the present invention consists of two metallized films on which are formed a plurality of insulated island-shaped evaporated electrodes at regular intervals in the longitudinal direction of a strip-shaped dielectric film, and a thermoplastic film. In a structure in which two dielectric films each having a resin layer formed by applying a resin are alternately laminated and wound, the resin layer of the dielectric film is attached to the vapor-deposited electrode of the two metallized films. The vapor deposition electrodes of the two metallized films that are in close contact with each other are characterized in that the vapor deposition electrode of one of the metallized films faces both adjacent vapor deposition electrodes of the other metallized film. Since the plastic film capacitor of the present invention has the above structure, it is heated at a temperature higher than the melting point or softening point of the thermoplastic resin forming the resin layer to melt or soften it, thereby completely bonding the vapor-deposited electrode and the dielectric film. By adhering and solidifying, the impregnating agent is prevented from infiltrating the deposited metal.
本発明の実施例を図面について説明する。第１
図において、５ａ，５ｂはポリエステル等の合成
樹脂よりなる帯状の誘電体フイルムの長手方向の
片面に一定の間隔をおいてアルミニウム等の金属
の蒸着によつて島状の蒸着電極６ａ，６ｂを形成
した２枚の金属化フイルムである。７ａ，７ｂは
同じくポリエステル等の合成樹脂よりなる帯状の
誘電体フイルムで、その片面又は両面に熱可塑性
樹脂、例えばポリエステル樹脂を塗布して形成し
た樹脂層８ａ，８ｂを有する。９ａ，９ｂは金属
化フイルム５ａ，５ｂの両端の蒸着電極に接合し
たリード線である。本発明のコンデンサは上記金
属化フイルム５ａ，５ｂと誘電体フイルム７ａ，
７ｂとを交互に積層して巻回することによつて構
成される。誘電体フイルム７ａ，７ｂの樹脂層８
ａ，８ｂは金属化フイルム５ａ，５ｂの蒸着電極
６ａ，６ｂに密接し、２枚の金属化フイルム５
ａ，５ｂの蒸着電極６ａ，６ｂは、６ａは隣接す
る６ｂと６ｂの双方と対向し、６ｂは隣接する６
ａと６ａの双方と対向する。巻回されたコンデン
サ素子は樹脂層８ａ，８ｂを形成する熱可塑性樹
脂の融点又は軟化点より高い温度で加熱され、成
型器により加圧成形して誘電体フイルム７ａ，７
ｂを金属化フイルム５ａ，５ｂに密接固定し、さ
らにエポキシ樹脂を含浸して耐高電圧性を付与す
る。
Embodiments of the present invention will be described with reference to the drawings. 1st
In the figure, 5a and 5b are island-shaped evaporated electrodes 6a and 6b formed by evaporating metal such as aluminum at regular intervals on one longitudinal side of a strip-shaped dielectric film made of synthetic resin such as polyester. These are two metalized films. 7a and 7b are strip-shaped dielectric films made of synthetic resin such as polyester, and have resin layers 8a and 8b formed by coating thermoplastic resin, for example polyester resin, on one or both sides thereof. Lead wires 9a and 9b are connected to vapor deposition electrodes at both ends of the metallized films 5a and 5b. The capacitor of the present invention includes the metallized films 5a, 5b and the dielectric film 7a,
7b are alternately layered and wound. Resin layer 8 of dielectric films 7a, 7b
a, 8b are in close contact with the vapor deposition electrodes 6a, 6b of the metallized films 5a, 5b, and the two metallized films 5
The vapor deposition electrodes 6a and 6b of a and 5b are such that 6a faces both adjacent 6b and 6b, and 6b faces both adjacent 6b and 6b.
It faces both a and 6a. The wound capacitor element is heated at a temperature higher than the melting point or softening point of the thermoplastic resin forming the resin layers 8a, 8b, and is pressure-molded using a molding machine to form dielectric films 7a, 7.
b is closely fixed to the metallized films 5a and 5b, and further impregnated with epoxy resin to impart high voltage resistance.
樹脂層８ａ，８ｂを形成する熱可塑性樹脂は誘
電体フイルムと同種の樹脂を使用することが膨
脹、収縮の点から好ましい。樹脂層８ａ，８ｂの
硬さはシヨア硬さD70以下であることを要する。
D70以上の硬さは蒸着電極に機械的な悪影響を及
ぼすことが実験的に確認されたからである。 The thermoplastic resin forming the resin layers 8a and 8b is preferably the same type of resin as the dielectric film from the viewpoint of expansion and contraction. The hardness of the resin layers 8a and 8b is required to be equal to or less than Shore hardness D70.
This is because it has been experimentally confirmed that a hardness of D70 or higher has a negative mechanical effect on the deposited electrode.
本発明の作用効果を確認するために、シヨア硬
さD40ないしD90の樹脂層を備えた誘電体フイル
ムを使用する本発明のコンデンサＡおよび比較例
Ｂと、これを使用しない従来のコンデンサＣにつ
き、同一条件で破壊されるまで充放電の回数を試
験したところ、第２図に示すように、従来品Ｃは
100回以下の充放電で破壊されたのに対し、本発
明品Ａ（シヨア硬さD70以下）は1000回ないし
10000回の充放電に耐えることが確認された。ま
た比較例（シヨア硬さD80〜D90）は従来品Ｃよ
りは良好であるがＡよりは著しく劣つていること
が判明した。
In order to confirm the effects of the present invention, capacitors A and Comparative Example B of the present invention that use a dielectric film having a resin layer with a shore hardness of D40 to D90, and a conventional capacitor C that does not use the same, were examined. When testing the number of charging and discharging cycles until destruction under the same conditions, as shown in Figure 2, conventional product C
While it was destroyed after 100 charging/discharging cycles, the product A of the present invention (with shore hardness D70 or lower) was destroyed after 1000 cycles or less.
It has been confirmed that it can withstand 10,000 charging and discharging cycles. It was also found that the comparative example (shore hardness D80 to D90) was better than conventional product C, but significantly inferior to A.
以上述べたように、本発明のプラスチツクフイ
ルムコンデンサは、熱可塑性樹脂を塗布した誘電
体フイルムを金属化フイルムの蒸着電極に密着さ
せることによつてその破壊を防止してこの種のコ
ンデンサの寿命を高めると共にその信頼度を向上
するすぐれた効果を有する。 As described above, the plastic film capacitor of the present invention has a dielectric film coated with a thermoplastic resin adhered to the vapor-deposited electrode of the metallized film, thereby preventing its destruction and extending the life of this type of capacitor. It has an excellent effect of increasing reliability as well as increasing reliability.
第１図：本発明の巻回型プラスチツクフイルム
コンデンサを構成するコンデンサ素子の分解側面
図、第２図：本発明のコンデンサと従来のコンデ
ンサとの特性を比較するグラフ、第３図：従来の
金属箔電極型コンデンサ素子の分解側面図、第４
図：第３図のコンデンサ素子の等価回路図、第５
図：従来の蒸着電極型コンデンサ素子の分解側面
図。
１ａ，１ｂ……誘電体フイルム、２ａ，２ｂ…
…金属箔電極、３ａ，３ｂ……リード線、４ａ，
４ｂ……蒸着電極、（以下従来品）、５ａ，５ｂ…
…金属化フイルム、６ａ，６ｂ……蒸着電極、７
ａ，７ｂ……誘電体フイルム、８ａ，８ｂ……樹
脂層、９ａ，９ｂ……リード線。
Figure 1: An exploded side view of a capacitor element constituting the wound plastic film capacitor of the present invention. Figure 2: A graph comparing the characteristics of the capacitor of the present invention and a conventional capacitor. Figure 3: Conventional metal capacitor. Exploded side view of foil electrode type capacitor element, No. 4
Figure: Equivalent circuit diagram of the capacitor element in Figure 3, Figure 5
Figure: Exploded side view of a conventional vapor-deposited electrode type capacitor element. 1a, 1b...dielectric film, 2a, 2b...
...metal foil electrode, 3a, 3b...lead wire, 4a,
4b... Vapor deposition electrode, (hereinafter referred to as conventional product), 5a, 5b...
...Metalized film, 6a, 6b... Vapor deposition electrode, 7
a, 7b...Dielectric film, 8a, 8b...Resin layer, 9a, 9b...Lead wire.
Claims (1)
隔をおいて絶縁された島状の複数個の蒸着電極を
形成した２枚の金属化フイルムと、熱可塑性樹脂
を塗着して形成した樹脂層を有する２枚の誘電体
フイルムとを交互に積層して巻回した構造におい
て、前記誘電体フイルムの樹脂層は前記２枚の金
属化フイルムの蒸着電極に密接し、前記２枚の金
属化フイルムの蒸着電極は、その一方の金属化フ
イルムの蒸着電極が他方の金属化フイルムの隣接
する蒸着電極と双方と対向していることを特徴と
する巻回型プラスチツクフイルムコンデンサ。 ２ 前記誘電体フイルムに塗着されている熱可塑
性樹脂の樹脂層は、その硬さがシヨアー硬さD70
以下であることを特徴とする特許請求の範囲１の
巻回型プラスチツクフイルムコンデンサ。[Claims] 1. Two metallized films on which a plurality of insulated island-like evaporated electrodes are formed at regular intervals in the longitudinal direction of a strip-shaped dielectric film, and a thermoplastic resin is applied. In a structure in which two dielectric films each having a resin layer formed by the above-mentioned method are alternately laminated and wound, the resin layer of the dielectric film is in close contact with the vapor-deposited electrode of the two metallized films, and A wound plastic film capacitor characterized in that the vapor deposition electrodes of two metallized films are such that the vapor deposition electrode of one metallized film faces the adjacent vapor deposition electrode of the other metallized film. 2 The hardness of the thermoplastic resin layer applied to the dielectric film is Shore hardness D70.
A wound plastic film capacitor according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22146284A JPS6199321A (en) | 1984-10-22 | 1984-10-22 | Coil type resin film capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22146284A JPS6199321A (en) | 1984-10-22 | 1984-10-22 | Coil type resin film capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6199321A JPS6199321A (en) | 1986-05-17 |
| JPH0312447B2 true JPH0312447B2 (en) | 1991-02-20 |
Family
ID=16767094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22146284A Granted JPS6199321A (en) | 1984-10-22 | 1984-10-22 | Coil type resin film capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6199321A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03246918A (en) * | 1990-02-26 | 1991-11-05 | Matsushita Electric Ind Co Ltd | Wound type plastic film capacitor |
| JPH0793240B2 (en) * | 1990-06-01 | 1995-10-09 | 松下電器産業株式会社 | Method for manufacturing laminated film capacitor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5963712A (en) * | 1982-10-04 | 1984-04-11 | ニツセイ電機株式会社 | Method of producing film condenser |
| JPS5963713A (en) * | 1982-10-04 | 1984-04-11 | ニツセイ電機株式会社 | Method of producing film condenser |
-
1984
- 1984-10-22 JP JP22146284A patent/JPS6199321A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5963712A (en) * | 1982-10-04 | 1984-04-11 | ニツセイ電機株式会社 | Method of producing film condenser |
| JPS5963713A (en) * | 1982-10-04 | 1984-04-11 | ニツセイ電機株式会社 | Method of producing film condenser |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6199321A (en) | 1986-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |