I-Filimu Capacitors Ukukhuthaza ukuThuthwa ngokukhawuleza kweSiC kunye ne-IGBT Technology: YMIN Capacitor Application Solutions FAQ

I-Q1: Iyiphi indima ephambili yee-capacitors zefilimu kwi-architecture yombane yezithuthi zamandla amatsha?

A: Njengee-DC-link capacitors, umsebenzi wabo ophambili kukufunxa imisinga yebhasi ephezulu, ukuguquguquka kwamandla ombane agudileyo, kunye nokukhusela izixhobo zokutshintsha ze-IGBT/SiC MOSFET kumbane odlulayo kunye nokuhamba ngoku.

I-Q2: Kutheni i-platform ye-800V idinga i-capacitors yefilimu ephezulu yokusebenza?

A: Njengoko i-voltage yebhasi inyuka ukusuka kwi-400V ukuya kwi-800V, iimfuno ze-capacitor ukumelana ne-voltage, i-ripple current absorption esebenzayo, kunye nokutshatyalaliswa kobushushu kwanda kakhulu. I-ESR ephantsi kunye neempawu eziphezulu zokumelana ne-voltage yee-capacitors zefilimu zifaneleke ngakumbi kwiindawo eziphezulu zombane.

I-Q3: Ziziphi iingenelo eziphambili zefilimu ye-capacitors kwi-electrolytic capacitors kwizithuthi zamandla amatsha?

A: Banikezela ngevolthi ephezulu yokumelana, i-ESR esezantsi, ayiyopolar, kwaye inobomi obude. I-resonant frequency yabo iphezulu kakhulu kune-electrolytic capacitors, ehambelana neemfuno zokutshintsha okuqhelekileyo kwee-SiC MOSFETs.

I-Q4: Kutheni ezinye ii-capacitors zibangela ngokulula ukunyuka kombane kwii-inverters ze-SiC?

A: I-ESR ephezulu kunye ne-low resonant frequency ibathintela ekufunxeni ngokufanelekileyo i-high-frequency ripple current. Xa i-SiC itshintsha ngesantya esikhawulezayo, ukunyuka kwe-voltage kuyanda, okunokonakalisa isixhobo.

I-Q5: Ii-capacitors zefilimu zinceda njani ukunciphisa ubungakanani beenkqubo zokuqhuba umbane?

A: Kwisifundo se-Wolfspeed case, i-40kW SiC inverter idinga kuphela ii-capacitors zefilimu ezisibhozo (xa kuthelekiswa ne-22 electrolytic capacitors ye-silicon-based IGBTs), ukunciphisa kakhulu i-PCB footprint kunye nobunzima.

I-Q6: Zeziphi iimfuno ezintsha ezenza indawo ephezulu yokutshintsha rhoqo kwi-DC-Link capacitors?

A: I-ESR esezantsi iyadingeka ukunciphisa ilahleko yokutshintsha, i-resonant frequency ephezulu iyafuneka ukucinezela i-ripple-frequency ripple, kwaye i-dv / dt engcono yokumelana nayo iyafuneka.

I-Q7: Buvavanywa njani ukuthembeka kobomi bee-capacitors zefilimu?

A: Kuxhomekeke ekuzinzeni kwe-thermal yezinto (umzekelo, ifilimu ye-polypropylene) kunye noyilo lokutshatyalaliswa kobushushu. Ngokomzekelo, uchungechunge lwe-YMIN MDP luphucula ixesha lokuphila kumaqondo okushisa aphezulu ngokulungisa isakhiwo sokutshatyalaliswa kobushushu.

I-Q8: I-ESR ye-film capacitors ichaphazela njani ukusebenza kakuhle kwenkqubo?

A: I-ESR ephantsi inciphisa ukulahleka kwamandla ngexesha lokutshintsha, inciphisa uxinzelelo lwe-voltage, kwaye iphucula ngokuthe ngqo ukusebenza kwe-inverter.

I-Q9: Kutheni ii-capacitors zefilimu zifaneleka ngakumbi kwiindawo zemoto ezingcangcazelayo?

A: Ulwakhiwo lwabo oluqinileyo lwelizwe, luswele i-electrolyte engamanzi, lubonelela ngokuxhathisa kokungcangcazela xa kuthelekiswa ne-electrolytic capacitors, kunye nofakelo lwazo olungena-polarity lubenza lube bhetyebhetye.

I-Q10: Ithini isantya sokungena kwangoku kwee-capacitors zefilimu kwii-inverters zombane zombane?

A: Ngo-2022, amandla afakwe kwi-inverters esekelwe kwi-movie capacitor afikelele kwi-5.1117 yezigidi zeeyunithi, ezibalelwa kwi-88.7% yomthamo ofakiweyo weenkqubo zokulawula umbane. Iinkampani eziphambili ezifana neTesla kunye neNidec zibalelwa kwi-82.9%.

I-Q11: Kutheni ii-capacitors zefilimu nazo zisetyenziswa kwii-inverters ze-photovoltaic?

A: Iimfuno zokuthembeka okuphezulu kunye nobomi obude zifana nezo zezicelo zeemoto, kwaye zifuna ukumelana nokuguquguquka kweqondo langaphandle.

I-Q12: Uluhlu lwe-MDP lujongana njani nemiba yoxinzelelo lwamandla kwiisekethe ze-SiC?

A: Uyilo lwayo oluphantsi lwe-ESR lunciphisa ukutshintshwa kwe-overshoot, iphucula i-dv / dt ukumelana ne-30%, kwaye inciphisa umngcipheko wokuphuka kombane.

I-Q13: Olu chungechunge luqhuba njani kumaqondo okushisa aphezulu?

A: Ukusebenzisa izinto ezizinzileyo zokushisa okuphezulu kunye nesakhiwo esisebenzayo sokutshatyalaliswa kobushushu, siqinisekisa izinga lokubola kwamandla angaphantsi kwe-5% kwi-125 ° C.

I-Q14: Uluhlu lwe-MDP lufikelela njani kwi-miniaturization?

A: Itekhnoloji entsha yefilimu ebhityileyo yonyusa umthamo weyunithi nganye, okukhokelela kuxinaniso lwamandla olugqitha umndilili woshishino, okwenza uyilo lombane obambeneyo.

I-Q15: Iindleko zokuqala zeefilimu zefilimu ziphezulu kunezo ze-electrolytic capacitors. Ngaba zibonelela ngenzuzo yeendleko kumjikelo wobomi?

A: Ewe. I-Film capacitors inokuhlala ukuya kubomi besithuthi ngaphandle kokutshintshwa, ngelixa i-electrolytic capacitors ifuna ukugcinwa rhoqo. Ekuhambeni kwexesha, ii-capacitors zefilimu zibonelela ngeendleko eziphantsi.