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            ղ    Ϊҳ
            Ʒ
            > IGBTɢ >

            IGBT¶밲ȫ

            Դhttp://www.teacherandtherockbots.com/
            IGBT
            bbv-bbv-ģ
            IGBTIGBTֺFWDֹIGBTԴڲIGBTͷܣFWDbbv-оƬbbv-ǸԷĵĺϼƼΪIGBTbbv-巢ⷢĿɷΪ̬ͽbbv-ݽɱbbv-
            IGBTһ뿪Ҫڣ

            1IGBTڵͨʱб͵ѹ-Vcesat
            2IGBTڿʱпܺ-EonEoff

            IGBTĵĸԴbbv-VcesatɵͨEonEoffɿ
            ͨ + = IGBT

            FWDҲΪ

            1ͨʱͨѹVf
            2ڷָĹзָܺģErec

            VfɵͨErecɿ
            ͨ + = FWD
            VcesatEonbbv-EoffVfErecIGBT/FWDоƬļbbv-IGBT/FWDоƬͬVcesatEonbbv-EoffVfErecҲͬ
            IGBTĿɷΪ̬ĺͶ̬о̬İ̬ͨĺͶ̬̬ģģͨĺ͹ضڹضʱbbv-ĵԼbbv-ѹbbv-˻СԺԲ˼㾲̬ĵʱԲǶ̬ƽ˵ľ̬һָ̬ͨbbv-

            IGBT-IGBTͨģ
            IGBTͨڱ״̬IGBT伫ѹԼڱ͵ѹVcesat
            IGBTָ̬ͨIGBTͨڵͨѹVcesat
            VcesatIcĹϵͼĽԷʾ
            Vcesat = Vt0 + Rce * Ic
            IGBTĵͨģ
            Pcond = d * Vcesat * IcdΪIGBTĵͨռձ
            IGBT͵ѹĴСͨĵIcоƬĽTjżѹVgeй
            IGBT͵ѹֵVcesatbbv-
            ӢIGBTµı͵ѹֵ
            1Tj=252Tj=125ΪIc,nom(ıƵ)VGE=+15V
            IGBT-IGBTģ
            IGBT֮ԴڿܺΪڿͨ͹ضϵ˲͵ѹص
            ſƵʵеıҲñȽϴİͨĺ͹ضڸͨضʱģͨӵؽ͵ѹٶʱַõͬʱ迼ʵʵο֮IJ
            VceӽEonEoffɽƵؿIcVceȣ
            Eon = EON * IC/IC,NOM * Vce /
            Eoff = EOFF * IC/IC,NOM * Vce /
            IGBTĿģ
            PSW = Fsw * (Eon + Eoff)fSWΪƵbbv-
            IGBTܺĵĴС뿪ʱĵIcѹVceоƬĽ£Tjйbbv-
            IGBTܺĵֵEonbbv-Eoff
            ӢIGBTµĿֵܺ
            1Tj=252Tj=125ΪIC,NOM(bbv-ıƵ)bbv-
            IGBT-FWDģ
            ָFWDĹbbv-ͨתΪϵ˲bbv-bbv-ΪͨٻָΪ״̬
            Vrӽbbv-ErecɽƵؿIfVrȣ
            Erec = EREC * If /IF,NOM * Vr/
            FWDĿģ
            Prec = fSW * ErecfSWΪƵ
            FWDָܺĵĴСͨʱĵIfbbv-仯dif/dtѹVrоƬĽ£Tjй
            bbv-IGBTָܺĵֵEREC
            ӢIGBTµķֵָܺ
            1Tj=252Tj=125ΪIF,NOMbbv-ıƵbbv-
            IGBT-С᣺
            IGBT:
            ͨģ

            1IGBTоƬй
            2йأbbv-IGBTռձȳTj߶bbv-
            3йأVgeӶС

            ģ

            1IGBTоƬй
            2빤йأ뿪ƵѹTj߶
            3йأRgbbv-żضϵѹӶСbbv-

            FWD:
            ͨģ

            1FWDоƬй
            2빤йأFWDռձȳbbv-

            ģ

            1FWDоƬй
            2빤йأ뿪ƵѹTj߶

            ϵͳܵģ
            IGBTܵPTrΪ̬ͨ뿪֮ܵPDΪ̬ͨĺͿ֮ԱƵΪbbv-ϵͳܵPtotΪ6IGBT6֮
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