M'zaka zaposachedwapa, kukula kwa makampani atsopano opanga mphamvu monga malo osungira magetsi ndi magalimoto amagetsi (EVs) kwachititsa kuti pakhale kufunikira kwakukulu kwa ma capacitor a DC-Link. Mwachidule, ma capacitor a DC-Link amachita gawo lofunika kwambiri mu dera. Amatha kuyamwa ma pulse currents apamwamba kumapeto kwa basi ndikuchepetsa mphamvu ya basi, kuonetsetsa kuti ma switch a IGBT ndi SiC MOSFET atetezedwa ku zotsatira zoyipa za ma pulse currents apamwamba komanso ma transient voltage panthawi yogwira ntchito.
Pamene magetsi a mabasi a magalimoto atsopano amphamvu akukwera kuchoka pa 400V kufika pa 800V, kufunikira kwa ma capacitor a mafilimu kwawonjezeka kwambiri. Malinga ndi deta, mphamvu yoyikidwa ya ma inverter amagetsi oyendetsedwa ndi DC-Link thin-film capacitors inafika pa 5.1117 miliyoni mu 2022, zomwe zimapangitsa 88.7% ya mphamvu yoyikidwa ya magetsi owongolera. Ma drive inverter amakampani ambiri otsogola owongolera magetsi monga Tesla ndi Nidec onse amagwiritsa ntchito ma DC-Link film capacitors, omwe amapanga 82.9% ya mphamvu yoyikidwa ndipo akhala chisankho chachikulu pamsika wamagetsi oyendetsera magetsi.
Mapepala ofufuza akuwonetsa kuti mu ma inverter a silicon IGBT theka-mlatho, ma capacitor achikhalidwe a electrolytic nthawi zambiri amagwiritsidwa ntchito mu DC link, koma ma voltage surges amachitika chifukwa cha ESR yayikulu ya ma capacitor a electrolytic. Poyerekeza ndi mayankho a IGBT ozikidwa pa silicon, ma SiC MOSFET ali ndi switching frequency yapamwamba, kotero ma voltage surge amplitude mu DC link ya half-mlatho inverter ndi okwera, zomwe zingayambitse kuwonongeka kwa magwiridwe antchito a chipangizo kapena kuwonongeka, ndipo ma resonant frequency a ma electrolytic capacitors ndi 4kHz okha, zomwe sizikwanira kuyamwa ripple yamagetsi a SiC MOSFET.
Chifukwa chake, mu ntchito za DC monga ma inverter amagetsi ndi ma inverter a photovoltaic omwe ali ndi zofunikira zodalirika kwambiri,ma capacitor a filimunthawi zambiri amasankhidwa. Poyerekeza ndi ma capacitor a electrolytic a aluminiyamu, ubwino wawo wochita bwino ndi kukana kwamphamvu kwa magetsi, ESR yotsika, kusasinthasintha kwa polarity, magwiridwe antchito okhazikika, komanso moyo wautali, motero amapeza kukana kwamphamvu kwa ripple komanso kapangidwe kodalirika ka makina.
Machitidwe omwe amagwiritsa ntchito ma capacitor a thin-film angagwiritse ntchito mwayi wa ma frequency ambiri komanso kutayika kochepa kwa ma SiC MOSFET ndikuchepetsa kukula ndi kulemera kwa zinthu zopanda ntchito. Kafukufuku wa Wolfspeed akuwonetsa kuti inverter ya IGBT ya 10kW silicon-based imafuna ma capacitor 22 a aluminiyamu electrolytic, pomwe inverter ya 40kW SiC imangofunika ma capacitor 8 a thin-film, ndipo dera la PCB limachepanso kwambiri.
Poyankha kufunikira kwa msika, YMIN Electronics idayambitsaMDP mndandanda wa ma capacitor a filimu, zomwe zimagwiritsa ntchito ukadaulo wapamwamba komanso zipangizo zapamwamba kuti zigwirizane ndi SiC MOSFET ndi silicon-based IGBT. Ma capacitor a MDP series ali ndi ESR yotsika, mphamvu yolimba, mphamvu yotsika yotuluka komanso kukhazikika kwa kutentha kwambiri.
Ubwino wa zinthu za YMIN Electronics' film capacitor:
Kapangidwe ka capacitor ya filimu ya YMIN Electronics kamagwiritsa ntchito lingaliro lotsika la ESR kuti lichepetse kupsinjika kwa magetsi ndi kutayika kwa mphamvu panthawi yosintha ndikuwonjezera kugwiritsa ntchito bwino mphamvu ya makina. Ili ndi magetsi ambiri, imasintha malinga ndi malo okwera magetsi, ndikuwonetsetsa kuti makinawo ali olimba.
Ma capacitor a MDP ali ndi mphamvu ya 1uF-500uF komanso mphamvu ya volteji ya 500V mpaka 1500V. Ali ndi mphamvu yotsika yotulutsa madzi komanso kutentha kokhazikika. Kudzera mu zipangizo zapamwamba komanso njira zamakono, kapangidwe kogwira mtima kochotsa kutentha kamapangidwa kuti katsimikizire kuti magwiridwe antchito ake ndi okhazikika pa kutentha kwambiri, kukulitsa nthawi yogwira ntchito, komanso kupereka chithandizo chodalirika cha makina amagetsi amphamvu. Nthawi yomweyo,Ma capacitor a MDP mndandandandi ang'onoang'ono kukula, amphamvu kwambiri, ndipo amagwiritsa ntchito njira zatsopano zopangira filimu yopyapyala kuti akonze kuphatikiza ndi kugwira ntchito bwino kwa makina, kuchepetsa kukula ndi kulemera, ndikuwonjezera kusunthika ndi kusinthasintha kwa zida.
Mndandanda wa YMIN Electronics DC-Link film capacitor uli ndi kusintha kwa 30% pakulekerera kwa dv/dt komanso kuwonjezeka kwa 30% pa moyo wautumiki, zomwe zimapangitsa kuti ma circuits a SiC/IGBT akhale odalirika, zimapangitsa kuti ndalama zisamawonongeke kwambiri, komanso kuthetsa vuto la mitengo.
Nthawi yotumizira: Januwale-10-2025