JPS6225874Y2 - - Google Patents
Info
- Publication number
- JPS6225874Y2 JPS6225874Y2 JP1116980U JP1116980U JPS6225874Y2 JP S6225874 Y2 JPS6225874 Y2 JP S6225874Y2 JP 1116980 U JP1116980 U JP 1116980U JP 1116980 U JP1116980 U JP 1116980U JP S6225874 Y2 JPS6225874 Y2 JP S6225874Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- insulating resin
- electrode terminal
- electrode terminals
- bonded
- 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
- 229920005989 resin Polymers 0.000 claims description 17
- 239000011347 resin Substances 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 12
- 229910052573 porcelain Inorganic materials 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 4
- 239000003985 ceramic capacitor Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Landscapes
- Ceramic Capacitors (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【考案の詳細な説明】
本考案は、送配電用各種交流磁器コンデンサま
たはサージ吸収素子、高電圧分布改善用もしくは
レーザ電源用等のコンデンサとして使用される高
電圧磁器コンデンサに関する。[Detailed Description of the Invention] The present invention relates to a high voltage ceramic capacitor used as various AC ceramic capacitors for power transmission and distribution, surge absorption elements, high voltage distribution improvement, laser power supply, etc.
従来のこの種の高電圧磁器コンデンサは、第１
図および第２図に例示する如く、短円柱状に形成
された誘電体磁器１の軸方向両端面に、電極２，
３を設けると共に、該電極２，３の面上に断面円
形状の金属体でなる電極端子４，５をたとえば半
田等の接着材６によつて接合固定し、更に全体を
エポキシ樹脂等の絶縁樹脂７で被覆した構造とな
つていた。 Conventional high voltage porcelain capacitors of this type
As illustrated in the figure and FIG. 2, electrodes 2,
3, electrode terminals 4 and 5 made of metal bodies having a circular cross section are bonded and fixed on the surfaces of the electrodes 2 and 3 with an adhesive 6 such as solder, and the whole is insulated with an insulating material such as epoxy resin. It had a structure covered with resin 7.
この種の高電圧磁器コンデンサは、電極２，３
間に印加される電圧が非常に高く、電荷の充放電
動作時に、誘電体磁器１の厚み方向および径方向
に発生する電気歪（電歪現象）が通常のコンデン
サと比較にならない程大きくなる傾向にある。 This kind of high voltage porcelain capacitor has electrodes 2, 3
The voltage applied between them is very high, and the electrostriction (electrostrictive phenomenon) that occurs in the thickness direction and radial direction of the dielectric ceramic 1 during charging and discharging operations tends to be incomparably large compared to ordinary capacitors. It is in.
また、従来の構成では、電極端子４，５の材質
は、快削性の黄銅が用いられており、その線膨脹
係数は20〜23×10-6／deg程度である。他方誘電
体磁器１の線膨張係数は７〜12×10-6／deg絶縁
樹脂７は30〜50×10-6／deg程度である。このよ
うに、電極端子４，５、誘電体磁器１および絶縁
樹脂７相互間の線膨脹係数が大きく異なるため
に、低温−30℃−高温90℃間の冷熱サイクル試験
を行なうと、特に絶縁樹脂７と電極端子４，５と
の接合面および中心方向に向つて収縮しようとす
る収縮残留応力が発生し、接合界面に空隙や隙間
が生じ、この空隙や隙間に湿気が侵入して部分放
電を起し、高電圧磁器コンデンサとしての見掛上
のコロナ放電開始電圧を低下せしめる原因となつ
ていた。このため、沿面放電開始電圧が低下し、
高耐電圧寿命試験も著るしく短命となり、当該高
電圧磁器コンデンサを使用している機器の信頼性
を著るしく損う惧れがあつた。 Furthermore, in the conventional structure, the material of the electrode terminals 4 and 5 is brass, which is easy to cut, and has a coefficient of linear expansion of about 20 to 23×10 −6 /deg. On the other hand, the dielectric ceramic 1 has a linear expansion coefficient of about 7 to 12×10 -6 /deg, and the insulating resin 7 has a linear expansion coefficient of about 30 to 50×10 -6 /deg. As described above, since the coefficients of linear expansion among the electrode terminals 4 and 5, the dielectric ceramic 1, and the insulating resin 7 are greatly different, when performing a thermal cycle test between a low temperature of -30°C and a high temperature of 90°C, it is especially 7 and electrode terminals 4 and 5 and toward the center, a shrinkage residual stress is generated that tends to contract toward the joint surface and the center, creating voids and gaps at the joint interface, and moisture enters into these voids and gaps, causing partial discharge. This causes a decrease in the apparent corona discharge starting voltage of a high-voltage porcelain capacitor. For this reason, the creeping discharge inception voltage decreases,
The high voltage withstand life test was also significantly shortened, and there was a fear that the reliability of equipment using the high voltage porcelain capacitor would be significantly impaired.
そこで従来は、電極端子４，５における電極接
続側の端部４ａ，５ａを比較的大径にして、電極
２，３に対する接合面積を大きくすると共に、端
部４ａ，５ａの外周に環状溝８（第１図）を設け
たり、あるいは端部４ａ，５ａの上端面に斜状部
９（第２図）を設けて、電極端子４，５に対する
絶縁樹脂の接着強度を高め、これらの構造によつ
て、電極端子４，５の引張り強度を向上させ、耐
沿面放電や耐電圧特性を向上させるようにしてあ
つた。 Therefore, in the past, the ends 4a, 5a of the electrode terminals 4, 5 on the electrode connection side were made relatively large in diameter to increase the bonding area to the electrodes 2, 3, and an annular groove was formed on the outer periphery of the ends 4a, 5a. (Fig. 1) or provide a sloped part 9 (Fig. 2) on the upper end surfaces of the ends 4a, 5a to increase the adhesion strength of the insulating resin to the electrode terminals 4, 5, and improve these structures. Therefore, the tensile strength of the electrode terminals 4 and 5 was improved, and creeping discharge resistance and voltage resistance characteristics were improved.
しかし、電極端子４，５を電極２，３に対して
面接触的に接合固定する構造であつて、接着材６
は両者の接合面に介在するだけであるから、捩り
強度が不足し勝ちである。しかも、前述のような
溝８や斜状部９を設けても、電極端子４，５の捩
り強度はそれ程向上しない。 However, the structure is such that the electrode terminals 4 and 5 are bonded and fixed to the electrodes 2 and 3 in surface contact, and the adhesive 6
Since it is only present at the bonding surface between the two, the torsional strength tends to be insufficient. Furthermore, even if the grooves 8 and the oblique portions 9 are provided as described above, the torsional strength of the electrode terminals 4 and 5 will not improve much.
また、電極端子４，５に前述のような溝８や斜
状部９を設ける構造であると、電極端子４，５の
形状が複雑化し、加工が面倒で、コスト高にな
る。 In addition, if the electrode terminals 4 and 5 are provided with the grooves 8 and the oblique portions 9 as described above, the shapes of the electrode terminals 4 and 5 become complicated, which makes machining troublesome and increases costs.
本考案は、上述する従来の欠点を除去し、電極
端子の引張り強度および捩り強度が大きく、機械
的強度、耐電圧特性に優れた高信頼度の高電圧磁
器コンデンサを提供することを目的とする。 The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a highly reliable high voltage porcelain capacitor with high tensile strength and torsional strength of electrode terminals, excellent mechanical strength and withstand voltage characteristics. .
上記目的を達成するため、本考案は、誘電体磁
器の相対向する両面に設けた電極上に、断面円形
状の金属体でなる電極端子の一端面を突合わせ、
かつ、導電性接着材によつて接合固定し、前記誘
電体磁器及び前記誘電体磁器と前記電極端子との
接合部を絶縁樹脂で被覆した高電圧磁器コンデン
サにおいて、前記電極端子は、前記電極に接合さ
れる一端側の外周面に、前記電極と接合する一端
面から前記絶縁樹脂の被覆領域に達する凹溝を網
目状に設けたことを特徴とする。 In order to achieve the above object, the present invention abuts one end surface of an electrode terminal made of a metal body with a circular cross section on the electrodes provided on opposite surfaces of dielectric ceramic.
and a high-voltage porcelain capacitor in which the dielectric ceramic and the joint portion of the dielectric ceramic and the electrode terminal are coated with an insulating resin, the electrode terminal being bonded and fixed with a conductive adhesive, and the electrode terminal is attached to the electrode. The device is characterized in that the outer circumferential surface of one end to be joined is provided with a mesh-like concave groove extending from the one end face to be joined to the electrode to the area coated with the insulating resin.
以下実施例たる添付図面を参照し、本考案の内
容を具体的に説明する。第３図は本考案に係る高
電圧磁器コンデンサの部分断面図であり、第１
図、第２図と同一の参照符号は機能的に同一性あ
る構成部分を示している。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The content of the present invention will be specifically described below with reference to the accompanying drawings, which are examples. FIG. 3 is a partial cross-sectional view of the high-voltage ceramic capacitor according to the present invention.
The same reference numerals as in FIG. 2 indicate functionally identical components.
この実施例では、電極端子４，５は快削性の黄
銅等を用いて断面円形状に形成し、この電極端子
４，５における電極接続側の一端部外周に、絶縁
樹脂７の層厚と同程度の長さで、凹溝１０を網目
状に設けてある。このような凹溝１０は、電極端
子４，５の外周面にローレツト加工等を施すこと
により、簡単に形成することができる。 In this embodiment, the electrode terminals 4 and 5 are made of free-cutting brass or the like and have a circular cross section, and a layer of insulating resin 7 is formed on the outer periphery of one end of the electrode terminals 4 and 5 on the electrode connection side. Concave grooves 10 are provided in a mesh shape with approximately the same length. Such a groove 10 can be easily formed by knurling or the like on the outer peripheral surfaces of the electrode terminals 4 and 5.
上述のような凹溝１０を設けると、電極端子
４，５を電極２，３に半田等の接着材６によつて
接合固定した場合、網目状に多数本形成された凹
溝１０のそれぞれに、接着材６が流入して接合固
定されるので、電極２，３に対する電極端子４，
５の電気的、機械的接続が非常に強固になり、引
張り強度および捩り強度が著るしく増大する。 When the grooves 10 as described above are provided, when the electrode terminals 4 and 5 are bonded and fixed to the electrodes 2 and 3 with the adhesive 6 such as solder, each of the grooves 10 formed in a large number in a mesh shape , the adhesive 6 flows in and is bonded and fixed, so that the electrode terminals 4,
5, the electrical and mechanical connections become very strong, and the tensile strength and torsional strength are significantly increased.
しかも、絶縁樹脂７も各凹溝１０内に喰い込み
接着するので、電極端子４，５に対する絶縁樹脂
７の接着強度も非常に強固になり、電極端子４，
５の引張り強度および捩り強度が一層増増大し、
耐電圧特性が著るしく向上する。 Moreover, since the insulating resin 7 is also bitten into each groove 10 and bonded, the adhesion strength of the insulating resin 7 to the electrode terminals 4 and 5 is extremely strong, and the electrode terminals 4 and 5 are bonded to each other.
The tensile strength and torsional strength of 5 are further increased,
The withstand voltage characteristics are significantly improved.
上記した実施例では、凹溝１０は、絶縁樹脂７
の充填領域とほぼ等しい長さで形成してあるが、
第４図Ａに示すように、電極端子４，５の外周面
の全面に設けてもよい。また凹溝１０はあや目状
に限らず、たとえば第４図Ｂに示すように格子状
の網目として設けることもできる。 In the embodiment described above, the groove 10 is formed by the insulating resin 7
It is formed with a length almost equal to the filling area of
As shown in FIG. 4A, it may be provided on the entire outer peripheral surface of the electrode terminals 4 and 5. Further, the grooves 10 are not limited to a twill shape, but may also be provided as a lattice-like mesh, for example, as shown in FIG. 4B.
以上述べたように、本考案は、誘電体磁器の相
対向する両面に設けた電極上に、断面円形状の金
属体でなる電極端子の一端面を突合わせ、かつ、
導電性接着材によつて接合固定し、前記誘電体磁
器及び前記誘電体磁器と前記電極端子との接合部
を絶縁樹脂で被覆した高電圧磁器コンデンサにお
いて、前記電極端子は、前記電極に接合される一
端側の外周面に、前記電極と接合する一端面から
前記絶縁樹脂の被覆領域に達する凹溝を網目状に
設けたことを特徴とするから、凹溝のそれぞれに
半田等の接着材が流入して電極端子が電極に強固
に接合固定されると共に、誘電体磁器のまわりを
被覆する絶縁樹脂も前記凹溝のそれぞれに喰い込
み、電極端子に対する絶縁樹脂の接着強度が著る
しく増大する。この結果、電極および誘電体磁器
に対する電極端子の引張り強度、捩り強度が著る
しく増大するので、電極端子と絶縁樹脂との間の
界面剥離や、それに伴う沿面放電によるコロナ開
始電圧の低下もなく、耐電圧特性や冷熱サイクル
試験等の寿命特性が大幅に改善されることとな
る。 As described above, the present invention abuts one end surface of an electrode terminal made of a metal body with a circular cross section on the electrodes provided on opposite surfaces of dielectric ceramic, and
In a high-voltage ceramic capacitor in which the dielectric ceramic and the joint portion of the dielectric ceramic and the electrode terminal are bonded and fixed with a conductive adhesive and covered with an insulating resin, the electrode terminal is bonded to the electrode. The invention is characterized in that grooves are provided in a mesh pattern on the outer peripheral surface of one end side of the electrode, reaching from the one end surface to be bonded to the electrode to the area coated with the insulating resin. The insulating resin that covers the dielectric porcelain also digs into each of the grooves, significantly increasing the adhesive strength of the insulating resin to the electrode terminal. . As a result, the tensile strength and torsional strength of the electrode terminal with respect to the electrode and dielectric ceramic are significantly increased, so there is no interfacial peeling between the electrode terminal and the insulating resin, and there is no decrease in corona initiation voltage due to creeping discharge associated with it. , life characteristics such as withstand voltage characteristics and thermal cycle tests will be significantly improved.
しかも、凹溝はローレツト加工等により簡単に
形成することができるので、加工コストが安価に
なる等々の効果を得ることができる。 Furthermore, since the groove can be easily formed by knurling or the like, effects such as lower processing costs can be obtained.
第１図、第２図は従来の高電圧磁器コンデンサ
の断面図、第３図は本考案に係る高電圧磁器コン
デンサの断面図、第４図Ａ，Ｂは電極端子の他の
実施例における正面図をそれぞれ示している。
１……誘電体磁器、２，３……電極、４，５…
…電極端子、１０……凹溝。
Figures 1 and 2 are cross-sectional views of a conventional high-voltage ceramic capacitor, Figure 3 is a cross-sectional view of a high-voltage ceramic capacitor according to the present invention, and Figures 4 A and B are front views of other embodiments of the electrode terminal. Figures are shown respectively. 1... Dielectric ceramic, 2, 3... Electrode, 4, 5...
... Electrode terminal, 10 ... Concave groove.
Claims (1)
に、断面円形状の金属体でなる電極端子の一端面
を突合わせ、かつ、導電性接着材によつて接合固
定し、前記誘電体磁器及び前記誘電体磁器と前記
電極端子との接合部を絶縁樹脂で被覆した高電圧
磁器コンデンサにおいて、前記電極端子は、前記
電極に接合される一端側の外周面に、前記電極と
接合する一端面から前記絶縁樹脂の被覆領域に達
する凹溝を網目状に設けたことを特徴とする高電
圧磁器コンデンサ。 One end surface of an electrode terminal made of a metal body having a circular cross section is abutted onto the electrodes provided on opposite surfaces of the dielectric porcelain, and the electrode terminals are bonded and fixed using a conductive adhesive, and the dielectric porcelain and In a high voltage porcelain capacitor in which a joint portion between the dielectric ceramic and the electrode terminal is coated with an insulating resin, the electrode terminal has an outer circumferential surface on one end side to be joined to the electrode, from one end surface to be joined to the electrode. A high voltage porcelain capacitor characterized in that a concave groove is provided in a mesh shape reaching the area covered with the insulating resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1116980U JPS6225874Y2 (en) | 1980-01-31 | 1980-01-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1116980U JPS6225874Y2 (en) | 1980-01-31 | 1980-01-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56114532U JPS56114532U (en) | 1981-09-03 |
| JPS6225874Y2 true JPS6225874Y2 (en) | 1987-07-02 |
Family
ID=29607791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1116980U Expired JPS6225874Y2 (en) | 1980-01-31 | 1980-01-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6225874Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6393026B2 (en) * | 2013-08-09 | 2018-09-19 | 日立エーアイシー株式会社 | Metallized film capacitors |
-
1980
- 1980-01-31 JP JP1116980U patent/JPS6225874Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56114532U (en) | 1981-09-03 |
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