Kavalo wabwino ayenera kukhala ndi mpando wabwino! Kuti agwiritse ntchito bwino ubwino wa zipangizo za SiC, ndikofunikiranso kugwirizanitsa dongosolo la ma circuit ndi ma capacitor oyenera. Kuyambira pa kuyendetsa kwakukulu m'magalimoto amagetsi mpaka pa zochitika zatsopano zamagetsi monga ma inverter a photovoltaic, ma capacitor a mafilimu akuyamba kutchuka pang'onopang'ono, ndipo msika ukufunika zinthu zotsika mtengo kwambiri.
Posachedwapa, Shanghai Yongming Electronic Co., Ltd. yatsegula ma capacitor othandizira mafilimu a DC, omwe ali ndi zabwino zinayi zomwe zimapangitsa kuti akhale oyenera ma IGBT a m'badwo wachisanu ndi chiwiri wa Infineon. Amathandizanso kuthana ndi mavuto monga kukhazikika, kudalirika, kuchepetsedwa kwa mphamvu, komanso mtengo wa makina a SiC.
Ma capacitor a mafilimu amalowa pafupifupi 90% mu ma main drive applications. Nchifukwa chiyani SiC ndi IGBT amawafuna?
M'zaka zaposachedwapa, chifukwa cha kukula kwachangu kwa mafakitale atsopano amagetsi monga kusungira mphamvu, kuyatsa, ndi magalimoto amagetsi (EVs), kufunikira kwa ma capacitor a DC-Link kwakhala kukukwera mofulumira. Mwachidule, ma capacitor a DC-Link amagwira ntchito ngati ma buffer m'mabwalo, kuyamwa ma pulse currents apamwamba kuchokera kumapeto kwa basi ndikuchepetsa mphamvu ya basi, motero kuteteza ma switch a IGBT ndi SiC MOSFET ku ma pulse currents apamwamba komanso mphamvu ya transient voltage.
Kawirikawiri, ma capacitor a aluminiyamu electrolytic amagwiritsidwa ntchito pothandizira DC. Komabe, chifukwa cha mphamvu ya basi ya magalimoto atsopano yamagetsi yomwe ikukwera kuchoka pa 400V kufika pa 800V ndi makina a photovoltaic omwe akupita ku 1500V komanso ngakhale 2000V, kufunikira kwa ma capacitor amafilimu kukukwera kwambiri.
Deta ikuwonetsa kuti mu 2022, mphamvu yoyikidwa ya ma inverter amagetsi oyendetsera magetsi kutengera ma capacitor a DC-Link film idafika mayunitsi 5.1117 miliyoni, zomwe zimapangitsa 88.7% ya mphamvu yonse yoyikidwa ya ma control amagetsi. Makampani otsogola owongolera zamagetsi monga Fudi Power, Tesla, Inovance Technology, Nidec, ndi Wiran Power onse amagwiritsa ntchito ma capacitor a DC-Link film mu ma drive inverters awo, ndi chiŵerengero chophatikizidwa cha mphamvu yoyikidwa cha 82.9%. Izi zikusonyeza kuti ma capacitor amafilimu alowa m'malo mwa ma capacitor amagetsi ngati ofunikira pamsika wamagetsi.
Izi zili choncho chifukwa mphamvu yamagetsi yolimba kwambiri ya ma capacitor a aluminiyamu ndi pafupifupi 630V. Pakugwiritsa ntchito ma voltage ambiri komanso mphamvu zambiri kuposa 700V, ma capacitor angapo amagetsi amafunika kulumikizidwa motsatizana komanso motsatizana kuti akwaniritse zofunikira pakugwiritsa ntchito, zomwe zimabweretsa kutayika kwa mphamvu yowonjezera, mtengo wa BOM, komanso mavuto odalirika.
Pepala lofufuza kuchokera ku Yunivesite ya Malaysia likusonyeza kuti ma capacitor a electrolytic nthawi zambiri amagwiritsidwa ntchito mu DC link ya silicon IGBT half-bridge inverters, koma ma voltage surges amatha kuchitika chifukwa cha high equivalent series resistance (ESR) ya ma electrolytic capacitors. Poyerekeza ndi mayankho a silicon-based IGBT, ma SiC MOSFET ali ndi ma switching frequency apamwamba, zomwe zimapangitsa kuti ma voltage surge amplitudes apamwamba mu DC link ya half-bridge inverters. Izi zitha kubweretsa kuwonongeka kwa magwiridwe antchito a chipangizo kapena kuwonongeka, chifukwa ma resonant frequency a ma electrolytic capacitors ndi 4kHz okha, osakwanira kuyamwa ripple yamagetsi ya SiC MOSFET inverters.
Chifukwa chake, mu ntchito za DC zomwe zimafunikira kudalirika kwambiri, monga ma inverter amagetsi ndi ma inverter a photovoltaic, ma capacitor amafilimu nthawi zambiri amasankhidwa. Poyerekeza ndi ma capacitor a aluminiyamu electrolytic, ubwino wawo wogwirira ntchito umaphatikizapo kukana kwamphamvu kwa voltage, ESR yotsika, kusakhala ndi polarity, magwiridwe antchito okhazikika, komanso moyo wautali, zomwe zimapangitsa kuti kapangidwe ka makina kakhale kodalirika kwambiri komanso kukana kwamphamvu kwa ripple.
Kuphatikiza apo, kugwiritsa ntchito ma capacitor a filimu mu dongosolo kungagwiritse ntchito mobwerezabwereza ubwino wa ma SiC MOSFET omwe amataya pafupipafupi komanso otsika, kuchepetsa kwambiri kukula ndi kulemera kwa zinthu zopanda ntchito (ma inductor, ma transformer, ma capacitor) mu dongosolo. Malinga ndi kafukufuku wa Wolfspeed, inverter ya IGBT ya 10kW silicon-based silicon imafuna ma capacitor 22 a aluminiyamu electrolytic, pomwe inverter ya 40kW SiC imangofunika ma capacitor 8 a filimu, zomwe zimachepetsa kwambiri dera la PCB.
YMIN Yayambitsa Makina Atsopano Ojambulira Mafilimu Ndi Ubwino Unayi Waukulu Wothandizira Makampani Atsopano a Mphamvu
Pofuna kuthana ndi zosowa za msika mwachangu, YMIN posachedwapa yatulutsa mndandanda wa ma capacitor othandizira mafilimu a DC a MDP ndi MDR. Pogwiritsa ntchito njira zopangira zapamwamba komanso zipangizo zapamwamba, ma capacitor awa amagwirizana bwino ndi zofunikira zogwirira ntchito za SiC MOSFETs ndi ma IGBT okhala ndi silicon ochokera kwa atsogoleri apadziko lonse lapansi a semiconductor amphamvu monga Infineon.
Ma capacitor a YMIN a MDP ndi MDR ali ndi zinthu zingapo zodziwika bwino: kukana kofanana ndi kotsika (ESR), mphamvu yamagetsi yokwera, mphamvu yotsika yotuluka, komanso kukhazikika kwa kutentha.
Choyamba, ma capacitor a filimu a YMIN ali ndi kapangidwe kotsika ka ESR, zomwe zimachepetsa bwino kupsinjika kwa magetsi panthawi yosintha ma SiC MOSFET ndi ma IGBT okhala ndi silicon, motero amachepetsa kutayika kwa ma capacitor ndikukweza magwiridwe antchito onse a dongosolo. Kuphatikiza apo, ma capacitor awa ali ndi magetsi ambiri, omwe amatha kupirira mikhalidwe yamagetsi ambiri ndikuwonetsetsa kuti makinawo akugwira ntchito bwino.
Ma capacitor a filimu a YMIN a MDP ndi MDR amapereka ma capacitance osiyanasiyana a 5uF-150uF ndi 50uF-3000uF, ndi ma voltage osiyanasiyana a 350V-1500V ndi 350V-2200V, motsatana.
Kachiwiri, ma capacitor aposachedwa a YMIN ali ndi mphamvu yochepa yotulutsa mpweya komanso kutentha kwambiri. Pankhani ya makina owongolera zamagetsi amagetsi, omwe nthawi zambiri amakhala ndi mphamvu zambiri, kutentha komwe kumachitika kungakhudze kwambiri moyo ndi kudalirika kwa ma capacitor amafilimu. Pofuna kuthana ndi izi, mndandanda wa MDP ndi MDR wochokera ku YMIN umaphatikizapo zipangizo zapamwamba komanso njira zamakono zopangira kuti apange kapangidwe ka kutentha kwa ma capacitor. Izi zimatsimikizira kuti magwiridwe antchito okhazikika ngakhale m'malo otentha kwambiri, kupewa kuwonongeka kwa mtengo wa capacitor kapena kulephera chifukwa cha kukwera kwa kutentha. Kuphatikiza apo, ma capacitor awa amakhala ndi moyo wautali, amapereka chithandizo chodalirika kwambiri cha makina amagetsi amphamvu.
Chachitatu, ma capacitor a MDP ndi MDR ochokera ku YMIN ali ndi kukula kochepa komanso mphamvu zambiri. Mwachitsanzo, mu makina oyendetsa magetsi a 800V, njira yogwiritsira ntchito zida za SiC kuchepetsa kukula kwa ma capacitor ndi zinthu zina zosagwira ntchito, motero kulimbikitsa kuchepetsa mphamvu zamagetsi. YMIN yagwiritsa ntchito ukadaulo watsopano wopanga mafilimu, womwe sumangowonjezera kuphatikiza ndi kugwira ntchito bwino kwa makina onse komanso umachepetsanso kukula ndi kulemera kwa makinawo, kukulitsa kusunthika ndi kusinthasintha kwa zida.
Ponseponse, mndandanda wa YMIN wa DC-Link film capacitor umapereka kusintha kwa 30% pa kuthekera kopirira dv/dt komanso kuwonjezeka kwa moyo wa 30% poyerekeza ndi ma capacitor ena amafilimu omwe ali pamsika. Izi sizimangopereka kudalirika kwabwino kwa ma circuits a SiC/IGBT komanso zimaperekanso mtengo wabwino, kuthana ndi zopinga zamitengo pakugwiritsa ntchito ma capacitor amafilimu ambiri.
Monga mtsogoleri wa makampani, YMIN yakhala ikugwira ntchito kwambiri mu gawo la ma capacitor kwa zaka zoposa 20. Ma capacitor ake amphamvu kwambiri akhala akugwiritsidwa ntchito mokhazikika m'magawo apamwamba monga OBC, ma pile atsopano ochaja mphamvu, ma inverter a photovoltaic, ndi ma robot a mafakitale kwa zaka zambiri. Mbadwo watsopanowu wa zinthu za ma capacitor a mafilimu umathetsa mavuto osiyanasiyana pakuwongolera njira zopangira ma capacitor a mafilimu ndi zida, wamaliza satifiketi yodalirika ndi mabizinesi otsogola padziko lonse lapansi, ndipo wapeza ntchito yayikulu, kutsimikizira kudalirika kwa malondawo kwa makasitomala akuluakulu. Mtsogolomu, YMIN idzagwiritsa ntchito luso lake laukadaulo kwa nthawi yayitali kuti ithandizire chitukuko chachangu chamakampani atsopano amagetsi ndi zinthu zodalirika komanso zotsika mtengo za ma capacitor.
Kuti mudziwe zambiri, chonde pitani kuwww.ymin.cn.
Nthawi yotumizira: Julayi-07-2024