Pere e ntle e tšoaneloa ke sale e ntle! Ho sebelisa ka botlalo melemo ea lisebelisoa tsa SiC, ho boetse hoa hlokahala ho kopanya sistimi ea potoloho le li-capacitor tse loketseng. Ho tloha taolong e kholo ea ho khanna likoloing tsa motlakase ho ea maemong a matla a macha a matla joalo ka li-inverter tsa photovoltaic, li-capacitor tsa lifilimi li ntse li ata butle-butle, 'me' maraka o hloka ka potlako lihlahisoa tse theko e boima.
Haufinyane tjena, Shanghai Yongming Electronic Co., Ltd. e qadile di-capacitor tsa filimi tsa tshehetso ya DC, tse nang le melemo e mene e ikgethang e etsang hore di lokele di-IGBT tsa moloko wa bosupa wa Infineon. Di boetse di thusa ho sebetsana le diphephetso tsa botsitso, botshepehi, miniaturization le ditjeo ditsamaisong tsa SiC.
Li-capacitor tsa filimi li fihlella hoo e ka bang 90% ea ho kenella lits'ebetsong tsa drive e kholo. Ke hobane'ng ha SiC le IGBT li li hloka?
Lilemong tsa morao tjena, ka nts'etsopele e potlakileng ea liindasteri tse ncha tsa eneji tse kang polokelo ea matla, ho tjhaja le likoloi tsa motlakase (EV), tlhoko ea li-capacitor tsa DC-Link e ntse e eketseha ka potlako. Ha re e beha ka bokhutšoanyane, li-capacitor tsa DC-Link li sebetsa e le li-buffer lipotolohong, li monya maqhubu a phahameng a pulse ho tloha pheletsong ea bese le ho nolofatsa motlakase oa bese, ka hona li sireletsa li-switch tsa IGBT le SiC MOSFET ho tsoa maqhubung a phahameng a pulse le litlamorao tsa motlakase oa nakoana.
Ka tlwaelo, di-capacitor tsa aluminium electrolytic di sebediswa ditshebedisong tsa tshehetso ya DC. Leha ho le jwalo, ka motlakase wa bese wa dikoloi tse ntjha tsa eneji o ntseng o eketseha ho tloha ho 400V ho ya ho 800V le ditsamaiso tsa photovoltaic di ntse di fetela ho 1500V esita le 2000V, tlhokeho ya di-capacitor tsa filimi e ntse e eketseha haholo.
Lintlha li bontša hore ka 2022, bokhoni bo kentsoeng ba li-inverter tsa motlakase tse thehiloeng ho li-capacitor tsa lifilimi tsa DC-Link bo fihlile ho li-unit tse limilione tse 5.1117, e leng se etsang 88.7% ea bokhoni bohle bo kentsoeng ba li-control tsa elektroniki. Likhamphani tse etellang pele tsa taolo ea elektroniki tse kang Fudi Power, Tesla, Inovance Technology, Nidec, le Wiran Power kaofela li sebelisa li-capacitor tsa lifilimi tsa DC-Link ho li-inverter tsa tsona tsa drive, ka karolelano ea bokhoni bo kopaneng bo kentsoeng ba ho fihlela ho 82.9%. Sena se bontša hore li-capacitor tsa lifilimi li nkile sebaka sa li-capacitor tsa electrolytic e le tse ka sehloohong 'marakeng oa li-drive tsa motlakase.
Lebaka ke hobane khanyetso e phahameng ka ho fetisisa ea motlakase ea li-capacitor tsa aluminium electrolytic e ka ba 630V. Litšebelisong tsa motlakase o phahameng le matla a phahameng a fetang 700V, li-capacitor tse ngata tsa electrolytic li hloka ho hokeloa ka tatellano le ka ho lekana ho fihlela litlhoko tsa ts'ebeliso, e leng se tlisang tahlehelo e eketsehileng ea matla, litšenyehelo tsa BOM le mathata a ts'epo.
Pampiri ea lipatlisiso e tsoang Univesithing ea Malaysia e bontša hore li-capacitor tsa electrolytic hangata li sebelisoa khokahanong ea DC ea li-inverter tsa halofo ea borokho ba silicon IGBT, empa ho phahama ha motlakase ho ka etsahala ka lebaka la khanyetso e phahameng ea letoto la equivalent series (ESR) ea li-capacitor tsa electrolytic. Ha li bapisoa le litharollo tsa IGBT tse thehiloeng ho silicon, li-SiC MOSFET li na le maqhubu a phahameng a ho fetola, e leng se fellang ka amplitudes e phahameng ea ho phahama ha motlakase khokahanong ea DC ea li-inverter tsa halofo ea borokho. Sena se ka lebisa ho senyeha ha ts'ebetso ea sesebelisoa kapa esita le tšenyo, kaha maqhubu a resonant a li-capacitor tsa electrolytic ke 4kHz feela, a sa lekaneng ho monya ripple ea hona joale ea li-inverter tsa SiC MOSFET.
Ka hona, lits'ebetsong tsa DC tse nang le litlhoko tse phahameng tsa ts'epo, joalo ka li-inverter tsa motlakase le li-inverter tsa photovoltaic, hangata li-capacitor tsa filimi li khethoa. Ha li bapisoa le li-capacitor tsa electrolytic tsa aluminium, melemo ea tsona ea ts'ebetso e kenyelletsa khanyetso e phahameng ea motlakase, ESR e tlase, ha e na polarity, ts'ebetso e tsitsitseng haholoanyane, le nako e telele ea bophelo, e nolofalletsang moralo oa sistimi o tšepahalang haholoanyane o nang le khanyetso e matla ea maqhubu.
Ho phaella moo, ho sebedisa di-capacitor tsa filimi tsamaisong ho ka sebedisa melemo ya SiC MOSFET ya maqhubu a hodimo le a tahlehelo e tlase kgafetsa, ho fokotsa boholo le boima ba dikarolo tse sa sebetseng (di-inductor, di-transformer, di-capacitor) tsamaisong haholo. Ho ya ka dipatlisiso tsa Wolfspeed, inverter ya IGBT e thehilweng ho silicon ya 10kW e hloka di-capacitor tsa electrolytic tsa aluminium tse 22, athe inverter ya SiC ya 40kW e hloka di-capacitor tsa filimi tse 8 feela, e leng se fokotsang sebaka sa PCB haholo.
YMIN e Qala Li-Capacitor tse Ncha tsa Lifilimi tse nang le Melemo e Mene e Meholo ea ho Tšehetsa Indasteri e Ncha ea Matla
Ho sebetsana le ditlhoko tse potlakileng tsa mmaraka, YMIN e sa tswa qala letoto la di-capacitor tsa filimi tsa tshehetso ya DC tsa MDP le MDR. Di sebedisa mekgwa e tswetseng pele ya tlhahiso le thepa ya boleng bo hodimo, di-capacitor tsena di tsamaisana hantle le ditlhoko tsa tshebetso tsa di-MOSFET tsa SiC le di-IGBT tse thehilweng ho silicon tse tswang ho baetapele ba di-semiconductor tsa matla a lefatshe jwalo ka Infineon.
Li-capacitor tsa lifilimi tsa letoto la MDP le MDR tsa YMIN li na le likarolo tse 'maloa tse hlahelletseng: khanyetso e tlase ea letoto le lekanang (ESR), motlakase o phahameng o lekantsoeng, motlakase o tlase oa ho lutla, le botsitso bo phahameng ba mocheso.
Taba ea pele, li-capacitor tsa filimi tsa YMIN li na le moralo o tlase oa ESR, o fokotsang khatello ea motlakase ka katleho nakong ea ho fetola li-SiC MOSFET le li-IGBT tse thehiloeng ho silicon, ka hona o fokotsa tahlehelo ea li-capacitor le ho ntlafatsa katleho ea sistimi ka kakaretso. Ho feta moo, li-capacitor tsena li na le motlakase o phahameng, o khonang ho mamella maemo a phahameng a motlakase le ho netefatsa ts'ebetso e tsitsitseng ea sistimi.
Letoto la di-capacitor tsa filimi tsa YMIN tsa MDP le MDR di fana ka mefuta ya bokgoni ba 5uF-150uF le 50uF-3000uF, le mefuta ya motlakase ya 350V-1500V le 350V-2200V, ka ho latellana.
Taba ea bobeli, li-capacitor tsa morao-rao tsa filimi tsa YMIN li na le phallo e tlase ea ho lutla le botsitso bo phahameng ba mocheso. Tabeng ea litsamaiso tsa taolo ea elektroniki tsa likoloi tsa motlakase, tseo hangata li nang le matla a mangata, tlhahiso ea mocheso e hlahisoang e ka ama haholo nako ea bophelo le ts'epo ea li-capacitor tsa lifilimi. Ho sebetsana le sena, letoto la MDP le MDR ho tsoa ho YMIN li kenyelletsa thepa ea boleng bo holimo le mekhoa e tsoetseng pele ea tlhahiso ho rala sebopeho se ntlafalitsoeng sa mocheso bakeng sa li-capacitor. Sena se netefatsa ts'ebetso e tsitsitseng esita le libakeng tse nang le mocheso o phahameng, ho thibela ho senyeha ha boleng ba capacitor kapa ho hloleha ka lebaka la ho phahama ha mocheso. Ho feta moo, li-capacitor tsena li na le nako e telele ea bophelo, li fana ka tšehetso e tšepahalang haholoanyane bakeng sa litsamaiso tsa elektroniki tsa motlakase.
Sa boraro, di-capacitor tsa letoto la MDP le MDR tse tswang ho YMIN di na le boholo bo bonyenyane le matla a mangata. Mohlala, ditsamaisong tsa motlakase tsa 800V, mokgwa ke ho sebedisa disebediswa tsa SiC ho fokotsa boholo ba di-capacitor le dikarolo tse ding tse sa sebetseng, ka hona ho kgothaletsa ho nkuwa ha ditaolo tsa elektroniki hanyane. YMIN e sebedisitse theknoloji e ntjha ya tlhahiso ya difilimi, e seng feela e eketsang kopanyo le bokgoni ba tsamaiso ka kakaretso empa hape e fokotsa boholo le boima ba sistimi, e ntlafatsang ho nkeha le ho tenyetseha ha disebediswa.
Ka kakaretso, letoto la di-capacitor tsa filimi tsa DC-Link tsa YMIN le fana ka ntlafatso ya 30% bokgoning ba ho mamella dv/dt le keketseho ya bophelo ba 30% ha ho bapiswa le di-capacitor tse ding tsa filimi tse mmarakeng. Sena ha se fane feela ka tshepo e betere bakeng sa dipotoloho tsa SiC/IGBT empa hape se fana ka katleho e betere ya ditjeo, ho hlola dithibelo tsa theko tshebedisong e pharaletseng ya di-capacitor tsa filimi.
Jwalo ka pula-maliboho wa indasteri, YMIN e bile le seabo se seholo tshimong ya capacitor ka dilemo tse fetang 20. Di-capacitor tsa yona tsa motlakase o phahameng di sebedisitswe ka botsitso masimong a maemo a hodimo jwalo ka OBC e ka hare ho sekepe, di-pile tse ntjha tsa ho tjhaja matla, di-inverter tsa photovoltaic, le diroboto tsa diindasteri ka dilemo tse ngata. Moloko ona o motjha wa dihlahiswa tsa capacitor tsa filimi o rarolla diphephetso tse fapaneng taolong ya tshebetso ya tlhahiso ya capacitor ya filimi le disebediswa, o phethetse setifikeiti sa botshepehi le dikgwebo tse etellang pele tsa lefatshe, mme o fihletse tshebediso e kgolo, e paka botshepehi ba sehlahiswa ho bareki ba baholo. Nakong e tlang, YMIN e tla sebedisa pokello ya yona ya botekgeniki ya nako e telele ho tshehetsa ntshetsopele e potlakileng ya indasteri e ntjha ya eneji ka dihlahiswa tsa capacitor tse tshepahalang haholo le tse theko e tlase.
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Nako ea poso: Phupu-07-2024