Moloko oa boraro oa li-semiconductor, tse emeloang ke gallium nitride (GaN) le silicon carbide (SiC), li ntlafalitsoe ka potlako ka lebaka la thepa ea tsona e ntle haholo. Leha ho le joalo, mokhoa oa ho lekanya ka nepo liparamente le litšobotsi tsa lisebelisoa tsena e le ho sebelisa bokhoni ba tsona le ho ntlafatsa bokhoni ba tsona le ts'epo ea tsona o hloka lisebelisoa tsa ho lekanya tse nepahetseng haholo le mekhoa ea botsebi.
Moloko o mocha oa thepa ea sekheo sa sehlopha se seholo (WBG) e emeloang ke silicon carbide (SiC) le gallium nitride (GaN) e ntse e sebelisoa haholo. Ka motlakase, lintho tsena li haufi le li-insulator ho feta silicon le thepa e meng e tloaelehileng ea semiconductor. Lintho tsena li etselitsoe ho hlola mefokolo ea silicon hobane ke thepa e moqotetsane ea sekheo sa sehlopha 'me ka hona e baka ho lutla ho fokolang ha conductivity ea motlakase, e bang teng haholo ha mocheso, motlakase kapa maqhubu a ntse a eketseha. Moeli o utloahalang oa ho lutla hona ke conductivity e sa laoleheng, e lekanang le ho hloleha ha ts'ebetso ea semiconductor.
Har'a thepa ena e 'meli e pharaletseng ea lekhalo la sehlopha, GaN e loketse haholo merero ea ts'ebetso ea matla a tlase le a mahareng, hoo e ka bang 1 kV le ka tlase ho 100 A. Sebaka se seng sa bohlokoa sa kholo bakeng sa GaN ke ts'ebeliso ea eona mabone a LED, empa hape e hola lits'ebelisong tse ling tsa matla a tlase joalo ka puisano ea likoloi le RF. Ka lehlakoreng le leng, mahlale a potileng SiC a ntlafalitsoe hamolemo ho feta GaN 'me a loketse hamolemo lits'ebetso tse phahameng tsa matla joalo ka li-inverter tsa ho hula likoloi tsa motlakase, phetiso ea motlakase, lisebelisoa tse kholo tsa HVAC, le litsamaiso tsa indasteri.
Lisebelisoa tsa SiC li khona ho sebetsa ka li-voltage tse phahameng, maqhubu a phahameng a ho fetola, le mocheso o phahameng ho feta li-Si MOSFET. Tlas'a maemo ana, SiC e na le ts'ebetso e phahameng, bokhoni, matla a mangata le ts'epo. Melemo ena e thusa baqapi ho fokotsa boholo, boima le litšenyehelo tsa li-converter tsa motlakase ho li etsa hore li qothisane lehlokoa haholoanyane, haholo-holo likarolong tsa 'maraka tse ruisang molemo tse kang lifofane, likoloi tsa sesole le tsa motlakase.
Li-MOSFET tsa SiC li bapala karolo ea bohlokoa nts'etsopele ea lisebelisoa tsa phetoho ea motlakase tsa moloko o latelang ka lebaka la bokhoni ba tsona ba ho fihlella ts'ebetso e kholo ea matla meralong e thehiloeng likarolong tse nyane. Phetoho ena e boetse e hloka hore baenjiniere ba hlahlobe bocha tse ling tsa mekhoa ea moralo le liteko tse neng li sebelisoa ka tloaelo ho theha lisebelisoa tsa elektroniki tsa motlakase.
Tlhoko ea liteko tse matla e ntse e hola
Ho hlokomela ka botlalo bokgoni ba disebediswa tsa SiC le GaN, ho hlokahala ditekanyo tse nepahetseng nakong ya tshebetso ya ho fetola ho ntlafatsa bokgoni le botshepehi. Mekgwa ya teko bakeng sa disebediswa tsa semiconductor tsa SiC le GaN e tlameha ho ela hloko maqhubu a hodimo a tshebetso le di-voltage tsa disebediswa tsena.
Ntlafatso ea lisebelisoa tsa liteko le tsa ho lekanya, tse kang lijenereithara tsa mesebetsi e sa reroang (AFGs), li-oscilloscope, lisebelisoa tsa yuniti ea tekanyo ea mohloli (SMU), le li-parameter analyzer, e thusa baenjiniere ba meralo ea motlakase ho fihlela liphetho tse matla haholoanyane ka potlako. Ntlafatso ena ea lisebelisoa e ba thusa ho sebetsana le liphephetso tsa letsatsi le letsatsi. "Ho fokotsa tahlehelo ea ho fetola e ntse e le phephetso e kholo bakeng sa baenjiniere ba lisebelisoa tsa motlakase," ho boletse Jonathan Tucker, hlooho ea Papatso ea Phepelo ea Matla ho Teck/Gishili. Meralo ena e tlameha ho lekanyetsoa ka thata ho netefatsa botsitso. E 'ngoe ea mekhoa ea bohlokoa ea ho lekanya e bitsoa teko ea pulse e habeli (DPT), e leng mokhoa o tloaelehileng oa ho lekanya liparamente tsa ho fetola tsa MOSFET kapa lisebelisoa tsa motlakase tsa IGBT.
Ho seta ho etsa teko ea ho pulse habeli ea semiconductor ea SiC ho kenyelletsa: jenereithara ea ts'ebetso ho khanna gridi ea MOSFET; Oscilloscope le software ea tlhahlobo bakeng sa ho lekanya VDS le ID. Ntle le liteko tsa ho pulse habeli, ke hore, ho phaella litekong tsa boemo ba potoloho, ho na le liteko tsa boemo ba thepa, liteko tsa boemo ba likarolo le liteko tsa boemo ba sistimi. Lintlafatso lisebelisoa tsa liteko li nolofalitse baenjiniere ba meralo mekhahlelong eohle ea potoloho ea bophelo ho sebetsa ho fihlela lisebelisoa tsa phetoho ea matla tse ka fihlelang litlhoko tse thata tsa moralo ka theko e tlase.
Ho itokisetsa ho netefatsa disebediswa ho arabela diphetoho tsa taolo le ditlhoko tse ntjha tsa theknoloji bakeng sa disebediswa tsa basebedisi ba ho qetela, ho tloha tlhahisong ya motlakase ho isa dikoloing tsa motlakase, ho dumella dikhamphani tse sebetsang ka di-elektroniki tsa motlakase ho tsepamisa maikutlo hodima boqapi bo ekeditsweng boleng le ho rala motheo wa kgolo ya nakong e tlang.
Nako ea poso: Hlakubele-27-2023