Moloko oa boraro oa li-semiconductors, tse emetsoeng ke gallium nitride (GaN) le silicon carbide (SiC), li 'nile tsa ntlafatsoa ka potlako ka lebaka la thepa ea tsona e babatsehang. Leha ho le joalo, mokhoa oa ho lekanya ka nepo li-parameter le litšoaneleho tsa lisebelisoa tsena e le ho theola bokhoni ba tsona le ho ntlafatsa ts'ebetso ea tsona le ts'epahalo ho hloka lisebelisoa tsa ho lekanya tse nepahetseng hantle le mekhoa ea litsebi.
Moloko o mocha oa lisebelisoa tsa "wide band gap" (WBG) tse emeloang ke silicon carbide (SiC) le gallium nitride (GaN) li ntse li sebelisoa haholo le ho feta. Ka motlakase, lintho tsena li haufi le li-insulators ho feta silicon le lisebelisoa tse ling tse tloaelehileng tsa semiconductor. Lintho tsena li etselitsoe ho hlola mefokolo ea silicon hobane ke sesebelisoa se moqotetsane se nang le lekhalo 'me ka hona se baka ho lutla ho hotle ha conductivity ea motlakase, e ntseng e totobala ha mocheso, voltage kapa maqhubu a eketseha. Moeli o utloahalang oa ho lutla hona ke conductivity e sa laoleheng, e lekanang le ho hlōleha ho sebetsa ha semiconductor.
Har'a lisebelisoa tsena tse peli tse pharaletseng tsa lekhalo, GaN e loketse haholo-holo bakeng sa merero ea ts'ebetsong ea matla a tlaase le a mahareng, a pota-potileng 1 kV le ka tlase ho 100 A. Sebaka se seng sa bohlokoa sa khōlo ea GaN ke tšebeliso ea eona ea mabone a LED, empa hape e ntse e hōla le lisebelisoa tse ling tse tlaase. joalo ka likhokahano tsa likoloi le tsa RF. Ka lehlakoreng le leng, theknoloji e potolohileng SiC e ntlafalitsoe hamolemo ho feta GaN 'me e loketse hamolemo lisebelisoa tse phahameng tsa matla tse kang li-inverters tsa motlakase oa koloi, phetisetso ea matla, thepa e kholo ea HVAC, le mekhoa ea indasteri.
Lisebelisoa tsa SiC li khona ho sebetsa ka li-voltages tse phahameng, maqhubu a phahameng a switjha, le mocheso o phahameng ho feta oa Si MOSFET. Tlas'a maemo ana, SiC e na le ts'ebetso e phahameng, ts'ebetso, matla a matla le ho tšepahala. Melemo ena e thusa baqapi ho fokotsa boholo, boima le litšenyehelo tsa li-converter tsa matla ho etsa hore li be le tlhōlisano, haholo-holo likarolong tse nang le chelete e ngata ea 'maraka tse kang lifofane, likoloi tsa sesole le tsa motlakase.
Li-SiC MOSFET li bapala karolo ea bohlokoa ho nts'etsopele ea lisebelisoa tsa ho fetola matla tsa moloko o latelang ka lebaka la bokhoni ba tsona ba ho fumana matla a maholo ho meralo e thehiloeng ho likaroloana tse nyane. Phetoho e boetse e hloka hore lienjiniere li boele li shebelle tse ling tsa meralo le mekhoa ea liteko eo ka tloaelo e neng e sebelisoa ho theha lisebelisoa tsa motlakase tsa motlakase.
Tlhokahalo ea liteko tse matla e ntse e eketseha
Ho lemoha ka botlalo bokhoni ba lisebelisoa tsa SiC le GaN, ho hlokahala litekanyo tse nepahetseng nakong ea ho fetola ts'ebetso ho ntlafatsa ts'ebetso le ts'epo. Mekhoa ea tlhahlobo ea lisebelisoa tsa semiconductor ea SiC le GaN e tlameha ho ela hloko maqhubu a holimo a ts'ebetso le maqhubu a lisebelisoa tsena.
Nts'etsopele ea lisebelisoa tsa tlhahlobo le litekanyo, joalo ka lijenereithara tsa ts'ebetso e sa sebetseng (AFGs), li-oscilloscopes, lisebelisoa tsa tekanyo ea mohloli (SMU) le li-parameter analyzers, li thusa baenjiniere ba meralo ea matla ho fumana liphetho tse matla ka potlako. Ntlafatso ena ea lisebelisoa e ba thusa ho sebetsana le mathata a letsatsi le letsatsi. "Ho fokotsa tahlehelo ea ho fetola e ntse e le phephetso e kholo ho baenjiniere ba lisebelisoa tsa motlakase," ho boletse Jonathan Tucker, hlooho ea Power Supply Marketing Teck/Gishili. Meetso ena e tlameha ho lekanyetsoa ka thata ho netefatsa botsitso. E 'ngoe ea mekhoa ea bohlokoa ea ho metha e bitsoa "double pulse test" (DPT), e leng mokhoa o tloaelehileng oa ho metha li-switching parameters tsa MOSFET kapa lisebelisoa tsa motlakase tsa IGBT.
Seta ho etsa SiC semiconductor double pulse test e kenyeletsa: jenereithara ya tshebetso ho kganna marangrang a MOSFET; Oscilloscope le software ea tlhahlobo ea ho lekanya VDS le ID. Ntle le tlhahlobo ea pulse habeli, ke hore, ntle le tlhahlobo ea boemo ba potoloho, ho na le tlhahlobo ea boemo ba thepa, tlhahlobo ea boemo ba likarolo le tlhahlobo ea boemo ba sistimi. Litlhahiso tsa lisebelisoa tsa liteko li thusitse baenjiniere ba meralo methating eohle ea bophelo ho sebeletsa lisebelisoa tsa ho fetola motlakase tse ka fihlelang litlhoko tse thata tsa moralo ka mokhoa o atlehileng.
Ho itokisetsa ho netefatsa lisebelisoa ho latela liphetoho tsa taolo le litlhoko tse ncha tsa thekenoloji bakeng sa lisebelisoa tsa basebelisi ba ho qetela, ho tloha phepelong ea motlakase ho ea ho likoloi tsa motlakase, ho lumella lik'hamphani tse sebetsang ka matla a elektronike hore li tsepamise maikutlo holim'a mekhoa e mecha ea bohlokoa le ho rala motheo oa kholo ea nako e tlang.
Nako ea poso: Mar-27-2023