Fast-scale bifurcation in single-stage PFC power supplies operating with DCM boost stage and CCM forward stage

Fast-scale bifurcation in single-stage PFC power supplies operating with DCM boost stage and CCM forward stage

This paper describes the fast-scale bifurcation phenomena of a single-stage single-switch power-factorcorrection (PFC) regulator comprising a boost stage operating in discontinuous conduction mode (DCM) and a forward stage operating in continuous conduction mode (CCM). The two stages combine into a single stage by sharing one main switch and one control loop. Using ‘exact’ cycle-by-cycle comput...

Interleaved Dcm Single-stage Pfc Converter with Reduced Emi and Boost Inductor Sizes

Hopf bifurcation as an Intermediate-Scale Instability in Single-Stage Power-Factor-Correction Power supplies: Analysis, Simulations and Experimental Verification

This paper reports intermediate-scale instability in a single-stage power-factor-correction (PFC) power supply that employs a cascade configuration of a boost stage operating in discontinuous conduction mode (DCM) and a forward stage operating in continuous conduction mode (CCM). The two stages combine into a single stage by sharing one main switch and one control loop to achieve input PFC and ...

Advantages of Using a Two-Switch Forward in Single-Stage Power Factor Corrected Power Supplies

PS 1-98 : Stability Analysis of Two-stage PFC Power Supplies

Power-factor-correction (PFC) power supplies are required to provide high input power factor and tight output voltage regulation. The usual configuration takes a two-stage cascade structure, consisting of a PFC preregulator and a dc/dc converter. Previous studies of the dynamical behaviour mainly focused on the boost PFC preregulator, assuming that it is being terminated by a resistive load. Ho...