Nkhani

Nkhani

Filimu Capacitor Parameter Description - mitundu itatu ya dielectric yosiyana Share

Metalization ndi yosiyana ndi kapangidwe ka filimu yojambula. Phunzitsani momwe mungasankhire apa. Kwa ma capacitor owonda kwambiri azitsulo, aluminiyumu amapopera mufilimu ya dielectric ndi filimu vacuum deposition. Metallization ndi yaying'ono kuposa capacitor yopangidwa ndi zojambula zosiyana ndi nembanemba wosanjikiza, kulemera kwake ndi kopepuka, ndipo mtengo wa unit Fala ndi wotsika, ndipo ukuchiritsa. Koma zimabweretsanso mphamvu yotsika. Kukula kwakung'ono ndi zotsika mtengo ndizowoneka bwino kwambiri mu mphamvu zamphamvu

 

Kudzichiritsa kumatanthawuza kufupipafupi kwapakati kapena kuwonongeka kwa nembanemba kuchokera ku overvoltage yosakhalitsa kuti ichotsedwe mu microfarad yochepa. Ichi ndi cholakwika chaching'ono mu voteji kunja, koma capacitor alibe kuwonongeka kosatha kupewa negligible capacitance kuchepa. Ubwino uwu umapangitsa HVC zitsulo filimu capacitor kukhala yolondola kusankha mkulu mu ntchito, koma milandu zinayi zotsatirazi:

1) Capacitance yaying'ono yochepera 0.01 μF, momwe kusiyana kwake sikuli kofunikira, ndipo filimu ya zojambulazo ndizochepa.
2) Monga mafunde opitilira muyeso mumayendedwe osasunthika,
3) Monga kuchuluka kwapanthawi kochepa mu chipika chodzidzimutsa,
4) Phokoso lochepa, pali vuto pakudziyeretsa uku, ngakhale kuti pang'ono kumatsagana ndi mphamvu ya phokoso.

 

Polyester dielectric: monga zitsulo nthawi zambiri zimakhala kusankha kwa mapangidwe a HVC, ndipo poliyesitala nthawi zambiri amasankha zida zamakanema a dielectric. Mu ma dielectrics atatu a HVC, poliyesitala imakhala ndi dielectric yokhazikika kwambiri, yomwe imapereka mtengo wotsika mtengo wocheperako capacitor, komanso mwayi wogwira ntchito pa kutentha mpaka 125 ° C pamagetsi ovotera theka. Komabe, pamene kutayika kwa mphamvu kumalepheretsa kusankha kwake ngati mphamvu yamakono kapena yothamanga kwambiri ya AC, kutayika kwa mphamvu kumalepheretsa ntchito yake pamagetsi apamwamba kapena apamwamba a AC; kuchokera -55 ° C mpaka 0 ° monga capacitance C ndi kuchokera 50 ° C mpaka 125 ° C, poliyesitala si capacitance yeniyeni pa kutentha kwambiri. Komabe, zimadziwika kuti capacitance kuchokera 0 ° C mpaka 50 ° C amangosinthidwa ± 1%.

 

Dielectric ya polypropylene imatengera mbali yake yotsika yotayika yomwe capacitor ya HVC ingakhale yoyenera ku DC high current, AC high voltage and communication high frequency applications. Nthawi yomweyo, zopinga zake zapamwamba zoteteza komanso kuyamwa kwa dielectric kumakumana ndi ma capacitor a DC. M'mapulogalamu ambiri, idzalowa m'malo mwa poliyesitala, kupatulapo kutsika kwake kwa dielectric; chifukwa woonda mkulu chiŵerengero zojambulazo filimu si analandira, kukula ndi lalikulu ndi apamwamba. Ndi chinthu choipa kuti kutentha kwakukulu kwa ntchito ndi 105 ° C. Polypropylene ndi yoyenera kwa mapulogalamu omwe ma polyester ambiri akusowa. Ikhoza ngakhale kupanga poliyesitala ingagwiritsidwe ntchito pa kutentha kwakukulu: capacitor yake ili pafupi ndi mlingo wofanana ndi kutentha kwa kutentha kumawonjezeka. Choncho, polypropylene capacitor parallel poliyesitala capacitance amapanga kutentha chipukuta misozi capacitor.

 

Polyphenylene sulfide imagwiritsidwa ntchito pochita bwino komanso kutentha kwake. Iwo akhoza kugwira ntchito kuchokera -55 ° C kuti 125 ° C, makamaka mphamvu zosakwana 1%, kupatula osiyanasiyana mtengo kwambiri. Polyphenylene sulfide ndiye filimu ya dielectric ya dielectric ya FCP chip capacitor.

 

Tchati chofananira cha dielectric: