Nonsmooth dynamics and FPIC chaos control in A DC-DC ZAD-strategy power converter

Nonsmooth phenomena such as discontinuity-induced bifurcations, due to saturations and switchings are re-ported in a power converter. They lead to chaos when a significant parameter is varied. Then, in this paper a novel tool for controlling chaos in a dynamical sys-tem is designed and applied to a buck converter driven with a PWM centered pulse and (Zero Average Dynam-ics) ZAD strategy. Chaotic operation has been stabi-lized with the so-called Fixed Point Induced Control (FPIC) technique. Numerical simulations and experi-mental results are reported. We can see in the results that the FPIC technique is a fast and efficient control for recovering stable periodic motion from chaotic op-eration. Appropriate software-reconfigurable hardware using a DSP-based rapid prototyping tool (RPT) is used to support the analytical and numerical discussion. Key words Piecewise-linear systems, Bifurcations, Chaos, DC-DC Converters, ZAD-strategy, FPIC technique