infineonNPT-IGBT控制TheReverseBehavioroftheNPT-IGBTinitsOn-State1ReverseStatesoftheIGBTinInverterCircuitsCausesforReverseStatesTheuseoftheIGBTininvertercircuitsdoesnotcomewithoutitsproblems.Duringtheswitchingcyclethesignsofcurrentandvoltageappliedtotheswitchingdevicechangetemporarilycausedbytheinversionofthefluxofenergybetweensupplyandload.TheIGBThasnoprovisionforcarryingnegativevoltages,thereforeitmustbeterminatedwithanantiparalleloraseriesdiode.However,itisnotpossibletocompletelysuppresstransientreversestatesoftheIGBT,whicharecausedbythetransientbehaviorofthediode(whichshowsforwardandreverserecovery)andarealsoduetoparasiticinductancewithinthecircuit.Characterandeffectofthe
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