Ii-Capacitors Power ezenziwe ngokwezifiso ezisetyenziswa kwiisekethe ze-DC-link
Inkcazo
Iimpawu zokusebenza kwee-capacitors zefilimu ziyahlukahluka ngokuxhomekeke kwi-dielectric material esetyenzisiweyo kunye neteknoloji yokwakha esetyenzisiweyo.Ezinye ze-dielectric zefilimu zeplastiki ezisetyenziswa ngokuqhelekileyo ziquka i-polyethylene naphthalate (PEN), i-polyethylene terephthalate (PET), kunye ne-polypropylene (PP).
Iicapacitors zeplastiki zeplastiki zinokuhlelwa ngokubanzi kwifilimu / ifoyile kunye neecapacitors zefilimu ezenziwe ngesinyithi.Isakhiwo esisisiseko sefilimu / i-foil capacitor iqukethe ii-electrode ezimbini zensimbi kunye nefilimu yeplastiki ye-dielectric phakathi kwabo.Iifilimi / iicapacitors zefoil zibonelela ngokuxhathisa okuphezulu kokugquma, amandla okuphatha i-pulse ephezulu, ukukwazi ukuthwala ngokugqwesileyo, kunye nokuzinza okuhle kwesakhono.Ngokungafaniyo nefilimu / i-foil capacitors, ii-capacitors zefilimu ezenziwe ngesinyithi zisebenzisa iifilimu zeplastiki ezifakwe ngesinyithi njengee-electrode.Iicapacitors zefilimu ezinentsimbi zinciphise ubungakanani bomzimba, kwaye zibonelela ngobuchule obuphezulu bevolumetric, uzinzo oluhle lwecapacitance, ilahleko yedielectric ephantsi, kunye neempawu ezibalaseleyo zokuziphilisa.Ezinye ii-capacitors ziyi-hybrid yefilimu / i-foil capacitors kunye ne-metallised film capacitors kunye neempawu zeempawu zeentlobo zombini.Iipropathi zokuziphilisa ze-metallised film capacitors zenza ukuba zilungele ubuninzi bezicelo, kubandakanywa ubomi obude kunye neesekethe zendlela yokungaphumeleli.
Ukuziphilisa kwe-metallised film capacitors
I-dielectrics yefilimu yeplastiki esetyenziswa ngokuqhelekileyo ekwakhiweni kwee-capacitors ze-metalized film zibandakanya i-polypropylene (PP), i-polyphenylene sulfide (PPS), i-polyester, kunye nephepha lensimbi (MP).Ezi zixhobo ze-dielectric zinezakhono ezahlukeneyo zokuziphilisa.
Xa ukuphuka kwenzeka kwi-capacitor yefilimu ene-metalized, i-arcing ibangela ukuba umaleko wesinyithi obhityileyo ojikeleze indawo yempazamo ukuba ube ngumphunga.Le nkqubo ye-vaporization isusa umaleko wesinyithi oqhubayo kwindawo ejikeleze isiphene.Ekubeni i-conductive material isusiwe, isiphaluka esifutshane asinakwenzeka phakathi kwamacwecwe.Oku kuthintela ukusilela kwecandelo.
Ikhono lokuziphilisa le-capacitor yefilimu ene-metallised kuxhomekeke kwizinto ezininzi ezibandakanya iipropati ze-dielectric material kunye nobukhulu be-metal layer.Inkqubo ye-vaporization idinga ukunikezelwa okwaneleyo kwe-oksijini kunye nezixhobo ze-dielectric kunye nomxholo ophezulu we-oksijini ongaphezulu zineendawo ezilungileyo zokuziphilisa.Ezinye zee-dielectric zefilimu zeplastiki ezineempawu ezintle zokuziphilisa ziquka i-polypropylene, i-polyester kunye ne-polycarbonate.Ngakolunye uhlangothi, ii-dielectrics zefilimu zeplastiki ezinomxholo ophantsi we-oksijini ophantsi zineempawu ezimbi zokuziphilisa.I-Polyphenylene sulfide (PPS) yenye yezinto ezinjalo zedielectric.
Ngaphandle kokuphucula ukuthembeka, amandla okuziphilisa we-capacitor yefilimu enesinyithi inceda ukuphucula ubomi babo bokusebenza.Nangona kunjalo, ukuziphilisa kubangela ukunciphisa indawo ye-electrode ye-metalized ngokuhamba kwexesha.
Kwizicelo, ezinye zeemeko ezinokukhawulezisa ukusilela kwecandelo ziquka amaqondo obushushu aphezulu, amandla ombane aphezulu, umbane, ukufuma okuphezulu, kunye nokuphazamiseka kombane wombane (EMI).
Ngaphandle kweepropathi ezilungileyo zokuziphilisa, ii-capacitors zefilimu ze-polyester ezinentsimbi nazo zine-dielectric rhoqo, ukuzinza okuhle kobushushu, amandla aphezulu e-dielectric, kunye nokusebenza kakuhle kwevolumetric.Ezi mpawu zenza ezi capacitors zilungele ukusetyenziswa kwenjongo jikelele.I-metallized polyester capacitors isetyenziswa ngokubanzi kwizicelo ze-DC ezinje ngokuthintela, ukudlula, ukudityaniswa, kunye nokucinezelwa kwengxolo.
Iicapacitors ze-polypropylene ezine-metallized zinika ukuxhathisa okuphezulu kwe-insulation, ukufunxwa kwe-dielectric ephantsi, ilahleko ye-dielectric ephantsi, amandla aphezulu e-dielectric, kunye nokuzinza kwexesha elide.Ezi zixhobo zisebenza ngokufanelekileyo kwindawo zisetyenziswa ngokubanzi kwiinkqubo eziqhotyoshelweyo ezifana neesekethe zokucoca, ii-ballasts zokukhanyisa, kunye neesekethe ze-snubber.I-capacitors yefilimu ye-polypropylene enesinyithi ephindwe kabini inokumelana nombane ophezulu kunye nemithwalo ephezulu ye-pulse, kwaye ifanelekile kwizicelo ezinokubakho okuphezulu kwee-pulses.Ezi capacitors ziqhele ukusetyenziswa kubalawuli beemoto, ii-snubbers, izixhobo zombane zemowudi, kunye nabahloli.
Ukuqukumbela
Ukuthembeka kunye nobomi bokusebenza kwee-capacitors kuxhomekeke kakhulu kwiimpawu zabo zokuziphilisa.Amacandelo e-Passive aneempawu ezintle zokuziphilisa athembeke ngakumbi kwaye anika ubomi obude bokusebenza.Iimpawu ezintle zokuziphilisa ze-metallised film capacitors ziphucula ukuqina kwazo kwaye zibenze zilungele izicelo ezininzi.Ukongeza, la macandelo omelele awaphumeleli kwisekhethi evulekileyo, kwaye oku kuwenza alungele izicelo ezifuna amacandelo anemo ekhuselekileyo yokusilela.
Kwi-flip side, ipropathi yokuziphilisa ye-metallised film capacitors ibangela ukuba ilahleko ikhule kwaye i-capacitance epheleleyo iyancipha.Ngaphandle kweepropathi ezilungileyo zokuziphilisa, uninzi lwee-capacitors zefilimu ezinesinyithi nazo zibonelela ngamandla okuqhekeka okuphezulu kunye nokusebenza kakuhle kwevolumetric.
Ukufumana iinkcukacha ezingaphezulu ze-movie capacitor, nceda ukhuphele ikhathalogu ye-CRE.
