Ma capacitor amagetsi opangidwa mwamakonda omwe amagwiritsidwa ntchito m'mabwalo a DC-link
Kufotokozera
Mawonekedwe a ma capacitor a kanema amasiyana makamaka kutengera zida za dielectric zomwe zimagwiritsidwa ntchito komanso ukadaulo womanga womwe umagwiritsidwa ntchito.Zina mwazinthu zomwe zimagwiritsidwa ntchito kwambiri ndi mafilimu apulasitiki apulasitiki ndi polyethylene naphthalate (PEN), polyethylene terephthalate (PET), ndi polypropylene (PP).
Ma capacitor a pulasitiki apulasitiki amatha kugawidwa m'magulu amafilimu / zojambulazo komanso ma capacitor azitsulo.Kapangidwe kake ka filimu / zojambulazo capacitor imakhala ndi maelekitirodi azitsulo awiri azitsulo ndi filimu yapulasitiki ya dielectric pakati pawo.Ma capacitor amakanema / zojambulazo amapereka kukana kwambiri kwa insulation, kugunda kwamphamvu kwambiri, kunyamula bwino kwapano, komanso kukhazikika kwamphamvu.Mosiyana ndi ma capacitor a filimu / zojambulazo, ma capacitor opangidwa ndi zitsulo amagwiritsa ntchito mafilimu apulasitiki okutidwa ndi zitsulo ngati ma electrode.Ma capacitor opangidwa ndi zitsulo zazitsulo achepetsa kukula kwa thupi, ndipo amapereka mphamvu zambiri za volumetric, kukhazikika kwabwino kwa capacitance, kutaya kwa dielectric kochepa, komanso kudzichiritsa bwino.Ma capacitor ena ndi wosakanizidwa wa ma capacitor a kanema / zojambulazo ndi ma capacitor opangidwa ndi zitsulo komanso mawonekedwe amitundu yonse iwiri.The kudzichiritsa katundu wa metallized film capacitors kuwapanga kukhala abwino sipekitiramu sipekitiramu ntchito, kuphatikizapo moyo wautali ndi chosaopsa mode kulephera mabwalo.
Kudzichiritsa nokha kwa metallized film capacitors
Ma dielectric amafilimu apulasitiki omwe amagwiritsidwa ntchito kwambiri popanga ma capacitor opangidwa ndi zitsulo amaphatikiza polypropylene (PP), polyphenylene sulfide (PPS), poliyesitala, ndi pepala lopangidwa ndi zitsulo (MP).Zida za dielectric izi zimakhala ndi mphamvu zodzichiritsa zokha.
Pamene kuwonongeka kumachitika mu capacitor yazitsulo yazitsulo, kugwedeza kumapangitsa kuti zitsulo zopyapyala kuzungulira malo olakwika ziwonongeke.Izi vaporization ndondomeko amachotsa conductive zitsulo wosanjikiza m'dera mozungulira chilema.Popeza ma conductive amachotsedwa, dera lalifupi silingachitike pakati pa mbale.Izi zimalepheretsa kulephera kwa gawolo.
Kuthekera kodzichiritsa kwa capacitor ya filimu yopangidwa ndi zitsulo kumadalira zinthu zambiri kuphatikizapo katundu wa dielectric ndi makulidwe a chitsulo chosanjikiza.Dongosolo la vaporization limafunikira mpweya wokwanira ndi zida za dielectric zokhala ndi okosijeni wapamwamba kwambiri zimakhala ndi zinthu zabwino zodzichiritsa zokha.Ena mwa ma dielectric amafilimu apulasitiki omwe ali ndi mawonekedwe abwino odzichiritsa okha ndi monga polypropylene, polyester ndi polycarbonate.Kumbali inayi, ma dielectric amafilimu apulasitiki okhala ndi okosijeni otsika pamwamba amakhala ndi machitidwe odzichiritsa okha.Polyphenylene sulfide (PPS) ndi imodzi mwazinthu zopangira dielectric.
Kupatula kukulitsa kudalirika, luso lodzichiritsa la ma capacitor opangidwa ndi zitsulo amathandizira kupititsa patsogolo moyo wawo wogwira ntchito.Komabe, kudzichiritsa nokha kumayambitsa kuchepa kwa malo opangira zitsulo pakapita nthawi.
M'mapulogalamu, zina mwazinthu zomwe zimatha kufulumizitsa kulephera kwa chinthu ndi monga kutentha kwambiri, ma voltages apamwamba, mphezi, chinyezi chambiri, ndi kusokoneza kwamagetsi (EMI).
Kupatula zinthu zabwino zodzichiritsa zokha, ma capacitor a filimu a polyester okhala ndi zitsulo amakhalanso ndi dielectric pafupipafupi, kutentha kwabwino, mphamvu ya dielectric yayikulu, komanso magwiridwe antchito apamwamba kwambiri.Makhalidwe awa amapangitsa ma capacitor awa kukhala abwino pazogwiritsa ntchito wamba.Metallized polyester capacitor amagwiritsidwa ntchito kwambiri pazinthu za DC monga kutsekereza, kudutsa, kulumikiza, ndi kupondereza phokoso.
Metallized polypropylene capacitors amapereka kukana kwambiri kwa insulation, kutsika kwa dielectric mayamwidwe, kutayika kochepa kwa dielectric, mphamvu yayikulu ya dielectric, komanso kukhazikika kwanthawi yayitali.Zida zomwe zimagwira ntchito bwino m'mlengalenga zimagwiritsidwa ntchito kwambiri pamakina olumikizidwa ndi mains monga ma frequency a fyuluta, ma ballast owunikira, ndi ma snubber circuits.Ma capacitor a filimu opangidwa ndi metallized polypropylene amatha kupirira kuchuluka kwa voteji ndi kugunda kwamphamvu, ndipo ndi oyenera kugwiritsidwa ntchito ndi kuthekera kwakukulu kwa kugunda kwamphamvu.Ma capacitor awa nthawi zambiri amagwiritsidwa ntchito poyang'anira ma motor, snubbers, switch mode magetsi, ndi zowunikira.
Mapeto
Kudalirika ndi moyo wogwira ntchito wa ma capacitor zimadalira kwambiri kuchiritsa kwawo.Zigawo zopanda kanthu zomwe zimakhala ndi makhalidwe abwino odzichiritsa ndizodalirika kwambiri ndipo zimapereka moyo wautali wogwira ntchito.Makhalidwe abwino odzichiritsa okha a metallized film capacitors amawonjezera kulimba kwawo ndikuwapangitsa kukhala oyenera ntchito zambiri.Kuphatikiza apo, zida zolimbazi zimalephera kutseguka, ndipo izi zimawapangitsa kukhala abwino kwa mapulogalamu omwe amafunikira zida zomwe zili ndi njira yolephera yotetezeka.
Pamphepete, katundu wodzichiritsa yekha wa metallized film capacitors amachititsa kuti chiwopsezo chiwonjezeke ndipo mphamvu yonse igwe.Kupatula zabwino zodzichiritsa zokha, ma capacitor ambiri opangidwa ndi zitsulo amakhalanso ndi mphamvu zosweka komanso kuchuluka kwa volumetric.
Kuti mumve zambiri za capacitor yamafilimu, chonde tsitsani kalozera wa CRE.
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