现代电力电子技术课件1Chapter4-part 2.ppt

文档介绍：1 Forward converter ? Buck-derived transformer-isolated converter ? Single-transistor and two-transistor versions ? Maximum duty cycle is limited ? Transformer is reset while transistor is off 2 Forward converter with transformer equivalent circuit 3 Forward converter: waveforms 4 Subinterval 1: transistor conducts 5 Subinterval 2: transformer reset 6 Subinterval 3 7 izing inductance volt-second balance 8 Transformer reset 9 What happens when D > 10 Conversion ratio M(D)