Isizukulwane sesithathu sama-semiconductor, amelelwa yi-gallium nitride (GaN) kanye ne-silicon carbide (SiC), athuthukiswe ngokushesha ngenxa yezakhiwo zawo ezinhle kakhulu. Kodwa-ke, indlela yokulinganisa ngokunembile amapharamitha nezici zala madivayisi ukuze kusetshenziswe amandla awo futhi kuthuthukiswe ukusebenza kahle kwawo kanye nokuthembeka kwawo kudinga imishini yokulinganisa enembile kakhulu kanye nezindlela zobungcweti.
Isizukulwane esisha sezinto ze-wide band gap (WBG) ezimelelwa yi-silicon carbide (SiC) kanye ne-gallium nitride (GaN) ziya ngokuya zisetshenziswa kabanzi. Ngogesi, lezi zinto ziseduze nezivikela-gesi kune-silicon nezinye izinto ezijwayelekile ze-semiconductor. Lezi zinto zenzelwe ukunqoba ukulinganiselwa kwe-silicon ngoba iyinto encane ye-band-gap ngakho-ke ibangela ukuvuza okubi kokuqhuba kukagesi, okuba sobala kakhulu njengoba izinga lokushisa, i-voltage noma imvamisa ikhuphuka. Umkhawulo onengqondo walokhu kuvuza ukuqondisa okungalawulwa, okulingana nokwehluleka kokusebenza kwe-semiconductor.
Kulezi zinto ezimbili ezibanzi ze-band gap, i-GaN ifaneleka kakhulu ezinhlelweni zokusebenzisa amandla aphansi naphakathi, cishe i-1 kV nangaphansi kwe-100 A. Indawo eyodwa ebalulekile yokukhula kwe-GaN ukusetshenziswa kwayo ekukhanyeni kwe-LED, kodwa futhi ikhula kwezinye izindlela zokusebenzisa amandla aphansi njengokuxhumana kwezimoto kanye ne-RF. Ngokuphambene nalokho, ubuchwepheshe obuzungeze i-SiC buthuthuke kangcono kune-GaN futhi bufaneleka kangcono ezinhlelweni zamandla aphezulu njengeziguquli zokudonsa izimoto zikagesi, ukudluliselwa kwamandla, imishini emikhulu ye-HVAC, kanye nezinhlelo zezimboni.
Amadivayisi e-SiC ayakwazi ukusebenza ngama-voltage aphezulu, ama-switching frequency aphezulu, kanye namazinga okushisa aphezulu kune-Si MOSFET. Ngaphansi kwalezi zimo, i-SiC inokusebenza okuphezulu, ukusebenza kahle, ubuningi bamandla kanye nokuthembeka. Lezi zinzuzo zisiza abaklami ukunciphisa usayizi, isisindo kanye nezindleko zama-power converter ukuze abenze bancintisane kakhudlwana, ikakhulukazi ezigabeni zemakethe ezinenzuzo njengezindiza, izimoto zempi kanye nezikagesi.
Ama-SiC MOSFET adlala indima ebalulekile ekuthuthukisweni kwamadivayisi okuguqula amandla esizukulwane esilandelayo ngenxa yekhono lawo lokufeza ukusebenza kahle kwamandla okukhulu emiklamo ngokusekelwe ezingxenyeni ezincane. Lolu shintsho ludinga futhi onjiniyela ukuthi babuke kabusha amanye amasu okuklama nokuhlola asetshenziswa ngokwesiko ukudala ama-electronics kagesi.
Isidingo sokuhlolwa okuqinile siyakhula
Ukuze kuqashelwe ngokugcwele amandla amadivayisi e-SiC ne-GaN, kudingeka izilinganiso eziqondile ngesikhathi sokusebenza kokushintsha ukuze kuthuthukiswe ukusebenza kahle nokuthembeka. Izinqubo zokuhlola zamadivayisi e-semiconductor e-SiC ne-GaN kumele zicabangele amaza okusebenza aphezulu kanye nama-voltage alawa madivayisi.
Ukuthuthukiswa kwamathuluzi okuhlola nokulinganisa, njenge-arrangement function generator (AFGs), ama-oscilloscope, izinsimbi zokulinganisa umthombo (SMU), kanye nabahlaziyi bamapharamitha, kusiza onjiniyela bokuklama amandla ukuthi bafinyelele imiphumela enamandla ngokushesha okukhulu. Lokhu kuthuthukiswa kwemishini kubasiza ukuthi babhekane nezinselele zansuku zonke. “Ukunciphisa ukulahlekelwa kokushintsha kusalokhu kuyinselele enkulu konjiniyela bemishini yamandla,” kusho uJonathan Tucker, inhloko ye-Power Supply Marketing eTeck/Gishili. Le miklamo kumele ilinganiswe ngokuqinile ukuqinisekisa ukuvumelana. Enye yezindlela zokulinganisa ezibalulekile ibizwa ngokuthi i-double pulse test (DPT), okuyindlela ejwayelekile yokulinganisa amapharamitha okushintsha ama-MOSFET noma amadivayisi kagesi e-IGBT.
Ukusethwa kokwenza ukuhlolwa kwe-SiC semiconductor double pulse kuhlanganisa: i-function generator yokushayela igridi ye-MOSFET; i-Oscilloscope kanye nesofthiwe yokuhlaziya yokulinganisa i-VDS kanye ne-ID. Ngaphezu kokuhlolwa kwe-double-pulse, okungukuthi, ngaphezu kokuhlolwa kweleveli yesekethe, kukhona ukuhlolwa kweleveli yezinto ezibonakalayo, ukuhlolwa kweleveli yezingxenye kanye nokuhlolwa kweleveli yesistimu. Ubuchwepheshe obusha kumathuluzi okuhlola buye bavumela onjiniyela bokuklama kuzo zonke izigaba zomjikelezo wokuphila ukuthi basebenzele amadivayisi okuguqula amandla angahlangabezana nezidingo zomklamo eziqinile ngendlela engabizi kakhulu.
Ukulungela ukuqinisekisa imishini ngokuphendula izinguquko zomthetho kanye nezidingo ezintsha zobuchwepheshe zemishini yabasebenzisi bokugcina, kusukela ekukhiqizweni kukagesi kuya ezimotweni zikagesi, kuvumela izinkampani ezisebenza kuma-electronics kagesi ukuthi zigxile emisha eyengeziwe futhi zibeke isisekelo sokukhula kwesikhathi esizayo.
Isikhathi sokuthunyelwe: Mashi-27-2023