Paper Capacitor

Japanese: 紙コンデンサー - かみこんでんさー
Paper Capacitor

A type of capacitor (electrical storage device) used in electric circuits. Also called a paper capacitor. The capacitance is 100 picofarads to 10 microfarads. Two or more sheets of condenser paper (insulated paper) and metal foil (approximately 5 to 6 micrometers thick) of aluminum, tin, lead, etc. are alternately layered and rolled up, soaked in an impregnating agent, and sealed. Paraffin was initially used as the impregnating agent, and later vegetable oil and silicone oil were used. Since the 1980s, sealed metal cases used in low-frequency power circuits have become oil-free for disaster prevention reasons, and products filled with nitrogen gas have been developed. Polypropylene film is also used as the dielectric instead of paper.

[Tadashi Fukino]

[Reference] | Metallized Paper Capacitors | Capacitors | Plastic Film Capacitors
The structure of a paper capacitor
©Shogakukan ">

The structure of a paper capacitor


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

電気回路に使われるコンデンサー(蓄電器)の一種。ペーパーコンデンサーともいう。静電容量は、100ピコファラド~10マイクロファラドである。コンデンサー紙(絶縁した紙)2枚以上とアルミ、スズ(錫)、鉛などの金属箔(はく)(約5~6マイクロメートル厚)を交互に重ねて巻き込み、含浸剤を浸して密閉した構造となっている。含浸剤には当初パラフィンが用いられ、のち植物油、シリコン油が使われた。低周波域の電力用回路に用いる密閉形の金属ケースには、1980年代より防災上オイルレス化が進み、窒素ガスを充填(じゅうてん)した製品が開発されている。誘電体も紙のかわりにポリプロピレンフィルムを用いている。

[吹野 正]

[参照項目] | 金属化紙コンデンサー | コンデンサー | プラスチックフィルム・コンデンサー
紙コンデンサーの構造
©Shogakukan">

紙コンデンサーの構造


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