Isizukulwana sesithathu see-semiconductors, ezimelwe yi-gallium nitride (GaN) kunye ne-silicon carbide (SiC), ziye zaphuhliswa ngokukhawuleza ngenxa yeempawu zazo ezibalaseleyo. Nangona kunjalo, indlela yokulinganisa ngokuchanekileyo iiparameter kunye neempawu zezi zixhobo ukuze zifikelele kumandla azo kwaye ziphucule ukusebenza kwazo kunye nokuthembeka kwazo kufuna izixhobo zokulinganisa ezichanekileyo kunye neendlela zobungcali.
Isizukulwana esitsha sezixhobo ze-wide band gap (WBG) ezimelwe yi-silicon carbide (SiC) kunye ne-gallium nitride (GaN) ziya zisetyenziswa kakhulu. Ngombane, ezi zinto zisondele kakhulu kwi-insulators kune-silicon kunye nezinye izinto eziqhelekileyo ze-semiconductor. Ezi zinto zenzelwe ukoyisa imida ye-silicon kuba yinto encinci ye-band-gap kwaye ngenxa yoko ibangela ukuvuza okungalunganga kwe-electrical conductivity, okubonakala ngakumbi njengoko ubushushu, i-voltage okanye i-frequency isanda. Umda ofanelekileyo wokuvuza kukuqhutywa kwe-conduction okungalawulwayo, okulingana nokusilela kokusebenza kwe-semiconductor.
Kwezi zinto zimbini zibanzi, iGaN ilungele kakhulu iinkqubo zokusetyenziswa kwamandla aphantsi naphakathi, malunga ne-1 kV kunye nangaphantsi kwe-100 A. Indawo enye ebalulekileyo yokukhula kweGaN kukusetyenziswa kwayo kwizibane ze-LED, kodwa ikwakhula nakwezinye iindlela zokusetyenziswa kwamandla aphantsi ezifana nonxibelelwano lweemoto kunye ne-RF. Ngokwahlukileyo koko, ubuchwepheshe obujikeleze iSiC buphuculwe ngcono kuneGaN kwaye bufanelekile ngakumbi kwizicelo zamandla aphezulu ezifana nee-inverters zombane, uthumelo lwamandla, izixhobo ezinkulu ze-HVAC, kunye neenkqubo zoshishino.
Izixhobo zeSiC ziyakwazi ukusebenza kwiivolthi eziphezulu, ii-switching frequency eziphezulu, kunye namaqondo obushushu aphezulu kuneeSi MOSFET. Phantsi kwezi meko, iSiC inomsebenzi ophezulu, ukusebenza kakuhle, uxinano lwamandla kunye nokuthembeka. Ezi nzuzo zinceda abayili ukuba banciphise ubungakanani, ubunzima kunye neendleko zee-power converters ukuze zikwazi ukukhuphisana ngakumbi, ngakumbi kwiindawo zemarike ezinengeniso efana neenqwelo moya, izithuthi zomkhosi kunye nezombane.
IiSiC MOSFET zidlala indima ebalulekileyo ekuphuhlisweni kwezixhobo zokuguqula umbane zesizukulwana esilandelayo ngenxa yokukwazi kwazo ukufikelela ekusebenzeni kakuhle kwamandla kwiindlela ezisekwe kwizinto ezincinci. Olu tshintsho lukwafuna ukuba iinjineli ziphinde zijonge ezinye zeendlela zoyilo kunye novavanyo ezazisetyenziswa ngokwesiko ukwenza izixhobo zombane zamandla.
Imfuno yovavanyo oluqatha iyanda
Ukuze kuqondwe ngokupheleleyo amandla ezixhobo zeSiC kunye neGaN, kufuneka imilinganiselo echanekileyo ngexesha lokusebenza kokutshintsha ukuze kuphuculwe ukusebenza kakuhle kunye nokuthembeka. Iinkqubo zokuvavanya izixhobo zeSiC kunye neGaN semiconductor kufuneka ziqwalasele amaza okusebenza aphezulu kunye nevolthi zezi zixhobo.
Uphuhliso lwezixhobo zovavanyo nokulinganisa, ezifana neejenereyitha zomsebenzi ezingacwangciswanga (ii-AFG), ii-oscilloscopes, izixhobo zeyunithi yokulinganisa umthombo (ii-SMU), kunye nee-parameter analyzers, kunceda iinjineli zoyilo lwamandla ukuba zifumane iziphumo ezinamandla ngokukhawuleza. Olu phuculo lwezixhobo lubanceda ukuba bajongane nemingeni yemihla ngemihla. “Ukunciphisa ilahleko yokutshintsha kusaqhubeka kungumngeni omkhulu kwiinjineli zezixhobo zamandla,” utshilo uJonathan Tucker, intloko yePower Supply Marketing eTeck/Gishili. Ezi zakhiwo kufuneka zilinganiswe ngokungqongqo ukuqinisekisa ukuhambelana. Enye yeendlela zokulinganisa eziphambili ibizwa ngokuba yi-double pulse test (DPT), eyindlela eqhelekileyo yokulinganisa iiparameter zokutshintsha zeMOSFET okanye izixhobo zamandla ze-IGBT.
Ukuseta ukwenza uvavanyo lwe-SiC semiconductor double pulse kuquka: i-function generator yokuqhuba i-MOSFET grid; i-Oscilloscope kunye nesoftware yohlalutyo yokulinganisa i-VDS kunye ne-ID. Ukongeza kuvavanyo lwe-double-pulse, oko kukuthi, ukongeza kuvavanyo lwenqanaba lesekethe, kukho uvavanyo lwenqanaba lezinto, uvavanyo lwenqanaba lecandelo kunye novavanyo lwenqanaba lenkqubo. Utshintsho kwizixhobo zovavanyo luye lwavumela iinjineli zoyilo kuzo zonke izigaba zomjikelo wobomi ukuba zisebenzele izixhobo zokuguqula amandla ezinokuhlangabezana neemfuno zoyilo ezingqongqo ngendlela engabizi kakhulu.
Ukulungela ukuqinisekisa izixhobo ngokuphendula kutshintsho lomthetho kunye neemfuno ezintsha zobuchwepheshe kwizixhobo zabasebenzisi bokugqibela, ukusuka ekuveliseni umbane ukuya kwizithuthi zombane, kuvumela iinkampani ezisebenza kwizixhobo zombane ukuba zigxile kwizinto ezintsha ezongezelelekileyo kwaye zibeke isiseko sokukhula kwexesha elizayo.
Ixesha leposi: Matshi-27-2023