Ama-Power capacitor enziwe ngokwezifiso asetshenziswa kumasekhethi e-DC-link
Ukucaciswa
Izici zokusebenza zama-capacitor wefilimu ziyahlukahluka kakhulu kuye ngokuthi i-dielectric material esetshenzisiwe kanye nobuchwepheshe bokwakha obusetshenzisiwe.Amanye ama-dielectric efilimu yepulasitiki esetshenziswa kakhulu afaka i-polyethylene naphthalate (PEN), i-polyethylene terephthalate (PET), ne-polypropylene (PP).
Ama-capacitor efilimu yepulasitiki angahlukaniswa ngokubanzi abe yifilimu/i-foil kanye nama-capacitor efilimu enziwe ngensimbi.Isakhiwo esiyisisekelo se-capacitor yefilimu/i-foil siqukethe ama-electrode amabili ensimbi ye-foil kanye ne-dielectric yefilimu yepulasitiki phakathi kwawo.Ama-capacitor wefilimu/i-foil anikezela ukumelana nokufakwa okuphezulu, amandla okubamba ukushaya kwenhliziyo okuphezulu, ikhono lokuthwala lamanje elihle kakhulu, nokuzinza okuhle kwekhono.Ngokungafani nama-capacitor efilimu/i-foil, ama-capacitor efilimu enziwe ngensimbi asebenzisa amafilimu epulasitiki anensimbi njengama-electrode.Ama-capacitor amafilimu ensimbi anciphise ubukhulu bomzimba, futhi anikeza ukusebenza kahle kwevolumu ephezulu, ukuqina okuhle kwe-capacitance, ukulahlekelwa okuphansi kwe-dielectric, kanye nezakhiwo ezinhle kakhulu zokuziphilisa.Amanye ama-capacitor ayingxube yama-capacitor efilimu/e-foil kanye nama-capacitor efilimu enziwe ngensimbi nezici ezifakiwe zazo zombili izinhlobo.Izakhiwo zokuziphilisa zama-metallised film capacitor ziwenza afaneleke kuhlelo olubanzi lwezinhlelo zokusebenza, okuhlanganisa impilo ende namasekhethi emodi yokwehluleka okuhle.
Ukuziphilisa kwama-capacitor efilimu enziwe ngensimbi
I-dielectrics yefilimu yepulasitiki evame ukusetshenziswa ekwakhiweni kwama-capacitor efilimu eyinsimbi ihlanganisa i-polypropylene (PP), i-polyphenylene sulfide (PPS), i-polyester, nephepha lensimbi (MP).Lezi zinto ze-dielectric zinamakhono ahlukene okuziphilisa.
Lapho ukuwohloka kwenzeka ku-capacitor yefilimu eyinsimbi, ukugoqa kubangela ungqimba lwensimbi oluncane oluzungeze indawo enephutha ukuba luhwamuke.Le nqubo ye-vaporization isusa ungqimba lwensimbi olusebenzayo endaweni ezungeze isici.Njengoba izinto eziqhutshwayo zisusiwe, isifunda esifushane asikwazi ukwenzeka phakathi kwamapuleti.Lokhu kuvimbela ukwehluleka kwengxenye.
Ikhono lokuziphilisa le-metallized film capacitor lincike ezintweni eziningi ezihlanganisa izakhiwo ze-dielectric material kanye nobukhulu bongqimba lwensimbi.Inqubo ye-vaporization idinga ukutholakala okwanele komoya-mpilo kanye nezinto ze-dielectric ezinokuqukethwe okuphezulu kwe-oksijini okungaphezulu kunezindawo ezinhle zokuziphilisa.Amanye ama-dielectrics efilimu yepulasitiki anezici ezinhle zokuziphilisa ahlanganisa i-polypropylene, i-polyester ne-polycarbonate.Ngakolunye uhlangothi, ama-dielectrics efilimu yepulasitiki anokuqukethwe okuphansi komoyampilo okungaphezulu anezici ezingezinhle zokuziphilisa.I-Polyphenylene sulfide (PPS) ingenye yezinto ezinjalo ze-dielectric.
Ngaphandle kokuthuthukisa ukuthembeka, ikhono lokuziphilisa lama-capacitor amafilimu enziwe ngensimbi asiza ukuthuthukisa impilo yawo yokusebenza.Kodwa-ke, ukuziphilisa kubangela ukuncishiswa kwendawo ye-metallized electrode ngokuhamba kwesikhathi.
Ezinhlelweni zokusebenza, ezinye zezimo ezingasheshisa ukwehluleka kwengxenye zihlanganisa amazinga okushisa aphezulu, ama-voltage aphezulu, umbani, umswakama ophezulu, nokuphazamiseka kazibuthe kagesi (EMI).
Ngaphandle kwezakhiwo ezinhle zokuziphilisa, ama-capacitor efilimu enziwe ngensimbi enziwe nge-polyester nawo ane-dielectric engaguquki, ukuqina okuhle kwezinga lokushisa, amandla aphezulu e-dielectric, nokusebenza kahle kwe-volumetric.Lezi zici zenza lawa ma-capacitor alungele ukusetshenziswa kwezinhloso ezijwayelekile.Ama-capacitor e-polyester anensimbi asetshenziswa kabanzi ezinhlelweni ze-DC ezifana nokuvimba, ukudlula, ukuqaqa, nokucisha umsindo.
Ama-capacitor e-polypropylene enziwe nge-metallized anikezela ukumelana nokufakwa okuphezulu, ukumuncwa kwe-dielectric okuphansi, ukulahleka kwe-dielectric okuphansi, amandla aphezulu e-dielectric, nokuzinza kwesikhathi eside.Lezi zingxenye ezisebenza kahle emkhathini zisetshenziswa kakhulu ezinhlelweni ezinamathiselwe ngokuyinhloko njengamasekhethi okuhlunga, ama-ballast akhanyayo, namasekhethi e-snubber.Ama-capacitor amafilimu e-polypropylene enziwe ngensimbi kabili angakwazi ukumelana nomthamo wamandla kagesi aphezulu kanye nemithwalo ye-high-pulse, futhi alungele izinhlelo zokusebenza ezinethuba eliphezulu lokushaya kwama-pulse.Lawa ma-capacitor avame ukusetshenziswa kwizilawuli zezimoto, ama-snubbers, amandla emodi yokushintsha, kanye nama-monitor.
Isiphetho
Ukuthembeka nempilo yokusebenza kwama-capacitor kuncike kakhulu ezicini zabo zokuziphilisa.Izingxenye ze-Passive ezinezici ezinhle zokuziphilisa zithembeke kakhulu futhi zinikeza impilo ende yokusebenza.Izici ezinhle zokuziphilisa zama-capacitor amafilimu e-metalized zithuthukisa ukuqina kwazo futhi zibenze bafanelekele izinhlelo zokusebenza eziningi.Ngaphezu kwalokho, lezi zingxenye eziqinile aziphumeleli kumjikelezo ovulekile, futhi lokhu kuzenza zilungele izinhlelo zokusebenza ezidinga izingxenye ezinemodi yokwehluleka ephephile.
Ngakolunye uhlangothi, indawo yokuziphilisa yama-capacitor efilimu eyinsimbi ibangela ukuthi isici sokulahlekelwa sikhule kanye namandla aphelele ehle.Ngaphandle kwezakhiwo ezinhle zokuziphilisa, ama-capacitor amaningi efilimu enziwe ngensimbi nawo anikeza amandla okuqhekeka okuphezulu nokusebenza kahle kwe-volumetric.
Ukuze uthole imininingwane eyengeziwe ye-film capacitor, sicela ulande ikhathalogi ye-CRE.
