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    ղ    Ϊҳ
    Ʒ
    > IGBTɢ >

    IGBT¶밲ȫ

    Դhttp://www.christian-fiction.com/
    IGBT
    ģ
    IGBTIGBTֺFWDֹIGBTĺڰֱnba߹ۿط-ڰֱnbaؿԴڲIGBTͷܣFWDоƬĺڰֱnba߹ۿط-ڰֱnbaؿǸԷĵĺϼƼΪIGBT巢ڰֱnba߹ۿط-ڰֱnbaؿⷢĿɷΪ̬ͽݽɱ
    IGBTһ뿪ڰֱnba߹ۿط-ڰֱnbaؿҪڣ

    1IGBTڵͨʱб͵ѹ-Vcesat
    2IGBTڿʱпܺ-EonEoff

    IGBTĵĸԴVcesatɵͨEonEoffɿ
    ͨ + = IGBT

    FWDҲΪ

    1ͨʱͨѹVfڰֱnba߹ۿط-ڰֱnbaؿ
    2ڷָĹзָܺģErec

    VfɵͨErecɿ
    ͨ + = FWD
    VcesatEonڰֱnba߹ۿط-ڰֱnbaؿڰֱnba߹ۿط-ڰֱnbaؿEoffVfErecIGBT/FWDоƬļڰֱnba߹ۿط-ڰֱnbaؿIGBT/FWDоƬͬVcesatEonEoffVfErecҲͬ
    IGBTĿɷΪ̬ĺͶ̬о̬İ̬ͨĺͶ̬̬ģģͨĺ͹ضڹضʱڰֱnba߹ۿط-ڰֱnbaؿĵԼڰֱnba߹ۿط-ڰֱnbaؿѹ˻СԺԲƺڰֱnba߹ۿط-ڰֱnbaؿ˼㾲̬ĵʱԲǶ̬ƽ˵ľ̬ĺڰֱnba߹ۿط-ڰֱnbaؿһָ̬ͨ

    IGBT-IGBTͨģ
    IGBTͨڱ״̬IGBT伫ѹԼڱ͵ѹVcesat
    IGBTָ̬ͨIGBTͨڵͨѹVcesat
    VcesatIcĹϵͼĽԷʾ
    Vcesat = Vt0 + Rce * Ic
    IGBTĵͨģ
    Pcond = d * Vcesat * Icڰֱnba߹ۿط-ڰֱnbaؿdΪIGBTĵͨռձڰֱnba߹ۿط-ڰֱnbaؿ
    IGBT͵ѹĴСͨĵIcоƬĽTjżѹVgeйڰֱnba߹ۿط-ڰֱnbaؿ
    IGBT͵ѹֵVcesat
    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)ڰֱnba߹ۿط-ڰֱnbaؿfSWΪƵʺڰֱnba߹ۿط-ڰֱnbaؿ
    IGBTܺĵĴС뿪ʱĵIcѹVceоƬĽ£Tjй
    IGBTܺĵֵEonEoffڰֱnba߹ۿط-ڰֱnbaؿ
    ӢIGBTڰֱnba߹ۿط-ڰֱnbaؿµĿֵܺ
    1Tj=252Tj=125ΪIC,NOM(ڰֱnba߹ۿط-ڰֱnbaؿıƵ)
    IGBT-FWDģ
    ָFWDĹͨתΪϵ˲ΪͨٻָΪ״̬
    VrӽErecɽƵؿIfVrȣ
    Erec = EREC * If /IF,NOM * Vr/
    FWDĿģ
    Prec = fSW * Erecڰֱnba߹ۿط-ڰֱnbaؿfSWΪƵ
    FWDָܺĵĴСͨʱĵIf仯dif/dtѹVrоƬĽ£Tjйڰֱnba߹ۿط-ڰֱnbaؿ
    ĺڰֱnba߹ۿط-ڰֱnbaؿIGBTָܺĵֵEREC
    ӢIGBTµķֵָܺ
    1Tj=252Tj=125ΪIF,NOMĺڰֱnba߹ۿط-ڰֱnbaؿıƵ
    IGBT-С᣺
    IGBT:
    ͨģ

    1IGBTоƬй
    2йأڰֱnba߹ۿط-ڰֱnbaؿIGBTռձȳTj߶
    3йأVgeӶС

    ģ

    1IGBTоƬй
    2빤йأ뿪ƵѹTj߶
    3йأRgżضϵѹӶСڰֱnba߹ۿط-ڰֱnbaؿ

    FWD:
    ͨģ

    1FWDоƬй
    2빤йأڰֱnba߹ۿط-ڰֱnbaؿFWDռձȳ

    ģ

    1FWDоƬй
    2빤йأ뿪Ƶѹڰֱnba߹ۿط-ڰֱnbaؿTj߶

    ϵͳܵģ
    IGBTܵPTrΪ̬ͨ뿪֮ܵPDΪ̬ͨĺͿ֮ڰֱnba߹ۿط-ڰֱnbaؿԱƵΪڰֱnba߹ۿط-ڰֱnbaؿϵͳܵPtotΪ6IGBT6֮
    ֤: ҸͼƬ
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       ҵѯqq513845646
       ֧qq313548578
       Ⱥ376450741
       ҵѯ:  ҷϢ
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