Ungalinganisa kanjani ngokunembile amadivayisi e-SiC ne-GaN ukuze uthephe amandla, uthuthukise ukusebenza kahle nokuthembeka

Isizukulwane sesithathu sama-semiconductors, amelwe yi-gallium nitride (GaN) ne-silicon carbide (SiC), athuthukiswe ngokushesha ngenxa yezakhiwo zawo ezinhle kakhulu. Nokho, indlela yokulinganisa ngokunembile amapharamitha nezici zalawa madivayisi ukuze uthephe amandla awo futhi uthuthukise ukusebenza kahle kwawo nokuthembeka kudinga okokusebenza kokulinganisa okunemba okuphezulu nezindlela zobungcweti.

Isizukulwane esisha se-wide band gap (WBG) izinto ezimelwe yi-silicon carbide (SiC) ne-gallium nitride (GaN) ziya ngokuya zisetshenziswa kabanzi. Ngogesi, lezi zinto ziseduze nama-insulators kune-silicon nezinye izinto ezijwayelekile ze-semiconductor. Lezi zinto zenzelwe ukunqoba imikhawulo ye-silicon ngoba iyisikhala esincane se-band-gap futhi ngenxa yalokho idala ukuvuza okungekuhle kokusebenza kukagesi, okugqama kakhulu njengoba izinga lokushisa, i-voltage noma imvamisa inyuka. Umkhawulo onengqondo walokhu kuvuza ukuqhutshwa okungalawulwa, okulingana nokwehluleka kokusebenza kwe-semiconductor.

Kulezi zinto ezimbili ezihlukene zegebe elibanzi, i-GaN ifaneleka kakhulu izinhlelo zokusebenzisa amandla aphansi naphakathi nendawo, cishe ku-1 kV nangaphansi kuka-100 A. Indawo eyodwa ebalulekile yokukhula kwe-GaN ukusetshenziswa kwayo ekukhanyeni kwe-LED, kodwa futhi ikhula kwezinye ukusetshenziswa kwamandla aphansi. njengokuxhumana kwezimoto kanye ne-RF. Ngokuphambene, ubuchwepheshe obuzungezile i-SiC buthuthukiswe kangcono kune-GaN futhi bufaneleka kangcono izinhlelo zokusebenza zamandla aphezulu njengama-inverter okudonsa imoto kagesi, ukudluliswa kwamandla, imishini emikhulu ye-HVAC, nezinhlelo zezimboni.

Amadivayisi e-SiC ayakwazi ukusebenza ngama-voltage aphezulu, amaza okushintshashintsha aphezulu, namazinga okushisa aphezulu kunama-Si MOSFET. Ngaphansi kwalezi zimo, i-SiC inokusebenza okuphezulu, ukusebenza kahle, ukuminyana kwamandla nokuthembeka. Lezi zinzuzo zisiza abaklami behlise usayizi, isisindo kanye nezindleko zeziguquli zamandla ukuze zikwazi ukuncintisana, ikakhulukazi ezigabeni zemakethe ezinenzuzo efana nezindiza, ezempi kanye nezimoto zikagesi.

Ama-SiC MOSFET adlala indima ebalulekile ekuthuthukisweni kwamadivayisi okuguqula amandla esizukulwane esilandelayo ngenxa yekhono lawo lokuthola ukusebenza kahle kwamandla okukhulu emiklameni esekelwe ezingxenyeni ezincane. Ukushintsha futhi kudinga ukuthi onjiniyela baphinde bavakashele ezinye zemiklamo kanye namasu okuhlola ngokuvamile asetshenziswa ukudala amandla kagesi.

Isidingo sokuhlolwa okuqinile siyakhula

Ukubona ngokugcwele amandla edivayisi ye-SiC ne-GaN, izilinganiso ezinembile ziyadingeka ngesikhathi sokushintshwa komsebenzi ukuze kuthuthukiswe ukusebenza kahle nokuthembeka. Izinqubo zokuhlola zamadivayisi we-semiconductor ye-SiC ne-GaN kufanele zicabangele amaza okusebenza aphezulu kanye nama-voltage alawa madivayisi.

Ukuthuthukiswa kwamathuluzi okuhlola nawokulinganisa, afana namajeneretha asebenzayo (AFGs), ama-oscilloscopes, amathuluzi wokulinganisa umthombo (i-SMU), nezihlaziyi zepharamitha, kusiza onjiniyela abaklama amandla ukuthi bathole imiphumela enamandla kakhulu ngokushesha okukhulu. Lokhu kuthuthukiswa kwemishini kuyabasiza ukuthi babhekane nezinselele zansuku zonke. "Ukunciphisa ukulahlekelwa kokushintshana kuseyinselelo enkulu konjiniyela bemishini kagesi," kusho u-Jonathan Tucker, inhloko ye-Power Supply Marketing e-Teck/Gishili. Le miklamo kufanele ikalwe ngokuqinile ukuze kuqinisekiswe ukuvumelana. Enye yezindlela zokulinganisa eziyinhloko ibizwa ngokuthi i-double pulse test (DPT), okuyindlela evamile yokukala amapharamitha okushintsha ama-MOSFET noma amadivayisi kagesi e-IGBT.

Ukusetha ukwenza ukuhlolwa kwe-SiC semiconductor double pulse kuhlanganisa: umsebenzi generator ukushayela igridi ye-MOSFET; I-Oscilloscope nesofthiwe yokuhlaziya yokulinganisa i-VDS ne-ID. Ngaphezu kokuhlolwa kwe-double-pulse, okungukuthi, ngaphezu kokuhlolwa kwezinga lesifunda, kukhona ukuhlolwa kwezinga lezinto ezibonakalayo, ukuhlolwa kwezinga lengxenye kanye nokuhlolwa kwezinga lesistimu. Ukuqamba okusha kumathuluzi okuhlola kwenze onjiniyela bemiklamo kuzo zonke izigaba zomjikelezo wempilo basebenzele kumadivayisi okuguqula amandla angahlangabezana nezimfuneko zedizayini eziqinile ngendlela engabizi kakhulu.

Ukulungela ukuqinisekisa imishini ngokuphendula izinguquko zokulawula kanye nezidingo ezintsha zobuchwepheshe zemishini yabasebenzisi bokugcina, kusukela ekuphehleni amandla kuya ezimotweni zikagesi, kuvumela izinkampani ezisebenza ngama-electronics amandla ukuthi zigxile emisha ye-value-added futhi zibeke isisekelo sokukhula kwesikhathi esizayo.