Bifurcation in parallel-connected buck converters under current-mode control

IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005, Kobe, 23-26 May 2005This paper studies a system of parallel-connected dc/dc buck converters under current-mode control. The effects of variations of the reference current are studied. It has been observed that the system exhibits low-frequency bifurcation behaviour while period-doubling at switching frequency is suppressed. Extensive simulations are used to capture the behaviour. Time-domain waveforms, stroboscopic maps and trajectories are shown. The paper reveals the drastic alteration of bifurcation behaviour of dc/dc converters due to subtle coupling.Department of Electronic and Information EngineeringRefereed conference pape