Ii-Power capacitors ezenziwe ngokwezifiso ezisetyenziswa kwiisekethe ze-DC-link

Inkcazo emfutshane:

Uthotho lwe-DMJ-PC

Ii-capacitor zefilimu ezenziwe ngesinyithi zezinye zezona capacitor zixhaphakileyo ezisetyenziswa kwiisekethe ze-elektroniki zanamhlanje ngelixa ii-capacitor zefilimu ezinamandla aphantsi zisetyenziswa rhoqo ekudibaniseni nasekuhluzeni.

Ii-capacitors zefilimu yamandla zisetyenziswa kakhulu kwiisekethe ze-DC-link, ii-pulsed lasers, ii-X-ray flashes, kunye nee-phase shifters

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Inkcazo

Iimpawu zokusebenza kwee-capacitors zefilimu ziyahluka ngokuxhomekeke kwizinto ezisetyenzisiweyo ze-dielectric kunye netekhnoloji yokwakha esetyenziswayo. Ezinye zezona dielectrics zefilimu zeplastiki ezisetyenziswa kakhulu ziquka i-polyethylene naphthalate (PEN), i-polyethylene terephthalate (PET), kunye ne-polypropylene (PP).

Ii-capacitor zefilimu zeplastiki zingahlulwahlulwa ngokubanzi zibe zii-capacitor zefilimu/i-foil kunye nee-capacitor zefilimu ezenziwe ngesinyithi. Ulwakhiwo olusisiseko lwe-capacitor yefilimu/i-foil luqulathe ii-electrode ezimbini ze-foil zesinyithi kunye ne-dielectric yefilimu yeplastiki phakathi kwazo. Ii-capacitor zefilimu/i-foil zibonelela ngokumelana okuphezulu kobushushu, amandla aphezulu okuphatha i-pulse, amandla amahle okuthwala umbane, kunye nozinzo oluhle lwe-capacitance. Ngokungafaniyo nee-capacitor zefilimu/i-foil, ii-capacitor zefilimu ezenziwe ngesinyithi zisebenzisa iifilimu zeplastiki ezenziwe ngesinyithi njengee-electrodes. Ii-capacitor zefilimu ezenziwe ngesinyithi zinobukhulu obuphantsi bomzimba, kwaye zibonelela ngokusebenza kakuhle kwe-volumetric, uzinzo oluhle lwe-capacitance, ilahleko ephantsi ye-dielectric, kunye neempawu ezilungileyo zokuziphilisa. Ezinye ii-capacitor ziyi-hybrid yee-capacitor zefilimu/i-foil kunye nee-capacitor zefilimu ezenziwe ngesinyithi kwaye zineempawu zazo zombini ezi ntlobo. Iimpawu zokuziphilisa zee-capacitor zefilimu ezenziwe ngesinyithi zizenza zilungele uluhlu olubanzi lwezicelo, kubandakanya ubomi obude kunye neesekethe zemo yokusilela okungengobungozi.

Ukuziphilisa kwee-capacitors zefilimu ezenziwe ngesinyithi

Ii-dielectric zefilimu zeplastiki ezisetyenziswa rhoqo ekwakheni ii-capacitors zefilimu ezenziwe ngesinyithi ziquka i-polypropylene (PP), i-polyphenylene sulfide (PPS), i-polyester, kunye nephepha elenziwe ngesinyithi (MP). Ezi zinto ze-dielectric zinezakhono ezahlukeneyo zokuziphilisa.

Xa kuqhekeka i-capacitor yefilimu eyenziwe ngesinyithi, i-arcing ibangela ukuba umaleko wesinyithi obhityileyo ojikeleze indawo yempazamo utshiswe. Le nkqubo yokutshiswa komphunga isusa umaleko wesinyithi oqhubayo kwindawo ejikeleze impazamo. Ekubeni izinto eziqhubayo zisusiwe, i-short circuit ayinakwenzeka phakathi kweepleyiti. Oku kuthintela ukungaphumeleli kwecandelo.

Amandla okuziphilisa e-capacitor yefilimu eyenziwe ngesinyithi axhomekeke kwizinto ezininzi kuquka iimpawu zezinto ze-dielectric kunye nobukhulu bomaleko wesinyithi. Inkqubo yokufutha ifuna ukunikezelwa okwaneleyo kweoksijini kunye nezixhobo ze-dielectric ezinomxholo ophezulu weoksijini zineepropati ezilungileyo zokuziphilisa. Ezinye ze-dielectric zefilimu zeplastiki ezineempawu ezilungileyo zokuziphilisa ziquka i-polypropylene, i-polyester kunye ne-polycarbonate. Kwelinye icala, ii-dielectric zefilimu zeplastiki ezinomxholo ophantsi weoksijini zineempawu ezimbi zokuziphilisa. I-Polyphenylene sulfide (PPS) yenye yezinto ezinjalo ze-dielectric.

Ngaphandle kokuphucula ukuthembeka, amandla okuziphilisa ee-capacitors zefilimu ezenziwe ngesinyithi anceda ukuphucula ubomi bazo bokusebenza. Nangona kunjalo, ukuziphilisa ngokwako kubangela ukuncipha kwendawo ye-electrode eyenziwe ngesinyithi ngokuhamba kwexesha.

Kwiinkqubo zokusebenza, ezinye zeemeko ezinokukhawulezisa ukungasebenzi kwecandelo ziquka amaqondo obushushu aphezulu, ii-voltage eziphezulu, umbane, ukufuma okuphezulu, kunye nokuphazamiseka kwe-electromagnetic (EMI).

Ngaphandle kweempawu ezilungileyo zokuziphilisa, ii-capacitor zefilimu ze-polyester ezenziwe ngesinyithi zikwanazo ne-dielectric constant ephezulu, uzinzo oluhle lobushushu, amandla aphezulu e-dielectric, kunye nokusebenza kakuhle kwe-volumetric. Ezi mpawu zenza ezi capacitors zilungele ukusetyenziswa ngokubanzi. Ii-capacitor ze-polyester ezenziwe ngesinyithi zisetyenziswa kakhulu kwizicelo ze-DC ezifana nokuvala, ukudlula, ukuqhawula, kunye nokunciphisa ingxolo.

Ii-capacitor ze-polypropylene ezinesinyithi zibonelela ngokumelana okuphezulu kobushushu, ukufunxwa kwe-dielectric okuphantsi, ukulahleka kwe-dielectric okuphantsi, amandla aphezulu e-dielectric, kunye nokuzinza kwexesha elide. Ezi zixhobo zisebenza kakuhle zisetyenziswa kakhulu kwizicelo eziqhotyoshelweyo eziphambili ezifana neesekethe zokucoca, ii-ballast zokukhanyisa, kunye neesekethe ze-snubber. Ii-capacitor zefilimu ze-polypropylene ezinesinyithi ezimbini zinokumelana nemithwalo ephezulu ye-voltage kunye ne-high-pulse, kwaye zifanelekile kwizicelo ezinomngcipheko ophezulu we-pulses enyukayo. Ezi capacitors zihlala zisetyenziswa kwi-motor controllers, snubbers, switch mode power supplies, kunye neemonitha.

Isiphelo

Ukuthembeka nokusebenza kwexesha kwee-capacitors kuxhomekeke kakhulu kwiimpawu zazo zokuziphilisa. Izixhobo ezingasebenziyo ezineempawu ezilungileyo zokuziphilisa zithembeke ngakumbi kwaye zinika ubomi obude bokusebenza. Iimpawu ezilungileyo zokuziphilisa zee-capacitors zefilimu ezenziwe ngesinyithi ziyawomeleza amandla azo kwaye ziwenze afaneleke kwiizicelo ezininzi. Ukongeza, ezi zixhobo ziqinileyo ziyasilela kwi-open-circuit, kwaye oku kuzenza zilungele usetyenziso olufuna izixhobo ezinemo yokusilela ekhuselekileyo.

Kwelinye icala, ipropathi yokuziphilisa yee-capacitors zefilimu ezenziwe ngesinyithi ibangela ukuba i-loss factor inyuke kwaye i-total capacitance yehle. Ngaphandle kwepropathi ezilungileyo zokuziphilisa, uninzi lwee-capacitors zefilimu ezenziwe ngesinyithi zikwabonelela ngamandla aphezulu okuqhekeka kunye nokusebenza kakuhle kwe-volumetric.

Ukuze ufumane iinkcukacha ezithe vetshe nge-capacitor yefilimu, nceda ukhuphele ikhathalogu ye-CRE.