Ama-Film Capacitors Akhuthaza Ukuthuthuka Okusheshayo kwe-SiC ne-IGBT Technology: I-YMIN Capacitor Application Solutions FAQ

I-Q1: Iyiphi indima eyinhloko yama-capacitor amafilimu ekwakhiweni kukagesi kwezimoto zamandla amasha?

A: Njengama-DC-link capacitor, umsebenzi wawo oyinhloko ukumunca ama-voltage aphezulu ebhasi, ukushintshashintsha kwamandla kagesi abushelelezi, nokuvikela amadivaysi okushintsha e-IGBT/SiC MOSFET ku-voltage yesikhashana kanye nokwenyuka kwamanje.

Q2: Kungani inkundla ye-800V idinga ama-capacitor amafilimu asebenza kahle?

A: Njengoba i-voltage yebhasi ikhuphuka isuka ku-400V iye ku-800V, izidingo ze-capacitor zimelana ne-voltage, ukusebenza kahle kokumuncwa kwamanje, kanye nokukhishwa kokushisa kukhuphuka kakhulu. I-ESR ephansi kanye nezici zokumelana ne-voltage ephezulu yama-capacitor wefilimu zifaneleka kakhulu endaweni ene-voltage ephezulu.

I-Q3: Yiziphi izinzuzo eziyinhloko zama-capacitor wefilimu ngaphezu kwama-electrolytic capacitors ezimotweni zamandla amasha?

A: Anikeza amandla aphezulu okumelana, i-ESR ephansi, awawona ama-polar, futhi anesikhathi eside sokuphila. Imvamisa yabo ezwakalayo iphakeme kakhulu kunaleyo yama-electrolytic capacitor, afana nezidingo zokushintshwa kwemvamisa ephezulu ye-SiC MOSFETs.

I-Q4: Kungani amanye ama-capacitor edala kalula ukunyuka kwama-voltage kuma-inverter e-SiC?

A: I-ESR ephezulu kanye nemvamisa ye-resonant ephansi iwavimbela ekumunceni ngempumelelo i-high-frequency ripple current. Lapho i-SiC ishintsha ngesivinini esisheshayo, ukunyuka kwamandla kagesi kuyanda, okungase kulimaze idivayisi.

I-Q5: Ama-capacitor wefilimu asiza kanjani ukunciphisa ubukhulu bezinhlelo zokushayela kagesi?

A: Ocwaningweni lwecala le-Wolfspeed, i-inverter ye-40kW SiC idinga ama-capacitor wefilimu ayisishiyagalombili kuphela (uma kuqhathaniswa nama-electrolytic capacitor angama-22 ama-IGBT asekelwe ku-silicon), anciphisa ngokuphawulekayo i-PCB footprint nesisindo.

I-Q6: Yiziphi izidingo ezintsha ezenza imvamisa yokushintsha okuphezulu ibeke kuma-capacitor e-DC-Link?

A: I-ESR ephansi iyadingeka ukuze kuncishiswe ukulahlekelwa kokushintsha, imvamisa ye-resonant ephezulu iyadingeka ukucindezela i-high-frequency ripple, kanye nekhono elingcono lokumelana ne-dv/dt nalo liyadingeka.

I-Q7: Kuhlolwa kanjani ukwethembeka kwempilo yama-capacitor wefilimu?

A: Kuncike ekuzinzeni kokushisa kwempahla (isb, ifilimu ye-polypropylene) kanye nomklamo wokulahla ukushisa. Isibonelo, uchungechunge lwe-YMIN MDP luthuthukisa ubude bempilo kumazinga okushisa aphezulu ngokulungiselela isakhiwo sokulahla ukushisa.

I-Q8: I-ESR ye-film capacitors ithinta kanjani ukusebenza kahle kwesistimu?

A: I-ESR ephansi inciphisa ukulahlekelwa kwamandla ngesikhathi sokushintsha, yehlisa ukucindezeleka kwamandla kagesi, futhi ithuthukisa ngokuqondile ukusebenza kahle kwe-inverter.

I-Q9: Kungani ama-capacitor wefilimu efaneleka kakhulu ezindaweni zezimoto ezinyakazayo?

A: Isakhiwo sazo sombuso oqinile, asinawo uketshezi lwe-electrolyte, sinikeza ukumelana nokudlidliza okuphakeme uma kuqhathaniswa nama-electrolytic capacitor, futhi ukufakwa kwawo okungenayo i-polarity kuwenza abe nezimo eziguquguqukayo.

I-Q10: Iyini izinga lamanje lokungena kwama-capacitor wefilimu kuma-inverters kagesi?

A: Ngo-2022, amandla afakiwe ama-inverters asekelwe ku-filimi capacitor afinyelele amayunithi ayizigidi ezingu-5.1117, okulinganiselwa ku-88.7% yenani eliphelele elifakiwe lezinhlelo zokulawula ugesi. Izinkampani ezihamba phambili ezifana neTesla neNidec zenze ama-82.9%.

I-Q11: Kungani ama-capacitor wefilimu nawo asetshenziswa kuma-inverters e-photovoltaic?

IMP: Izidingo zokuthembeka okuphezulu nempilo ende ziyefana nalezo ezisetshenziswa ezimotweni, futhi zidinga ukumelana nokuguquguquka kwezinga lokushisa kwangaphandle.

Q12: Uchungechunge lwe-MDP luzisingatha kanjani izinkinga zokucindezeleka kwamandla kagesi kumasekethe e-SiC?

A: Idizayini yayo ye-ESR ephansi inciphisa ukushintsha ukudlula, ithuthukisa ukumelana ne-dv/dt ngo-30%, futhi yehlisa ubungozi bokuphuka kwamandla kagesi.

Q13: Lolu chungechunge lusebenza kanjani emazingeni okushisa aphezulu?

A: Sisebenzisa izinto ezizinzile zezinga eliphezulu lokushisa kanye nesakhiwo esiphumelelayo sokulahla ukushisa, siqinisekisa izinga lokubola kwamandla elingaphansi kuka-5% ku-125°C.

I-Q14: Ngabe uchungechunge lwe-MDP lufinyelela kanjani ekwenzeni okuncane?

IMP: Ubuchwepheshe obusha befilimu elincanyana bukhuphula umthamo weyunithi ngayinye, okuholela ekuminyana kwamandla okudlula isilinganiso somkhakha, okuvumela imiklamo yedrayivu kagesi ehlangene.

I-Q15: Izindleko zokuqala zama-capacitor amafilimu ziphakeme kune-electrolytic capacitors. Ingabe banikeza inzuzo yezindleko ngaphezu komjikelezo wempilo?

A: Yebo. Ama-capacitor amafilimu angahlala kuze kube sekupheleni kwempilo yemoto ngaphandle kokushintshwa, kuyilapho ama-electrolytic capacitor adinga ukunakekelwa okuvamile. Ngokuhamba kwesikhathi, ama-capacitor amafilimu anikeza izindleko eziphansi eziphelele.