CONTROL OF BIFURCATIONS IN POWER ELECTRONIC DC-DC CONVERTERS
THROUGH MANIPULATION OF THE SALTATION MATRIX
Power electronic dc-dc converters are known to exhibit undesirable subharmonic and chaotic behaviour beyond certain parameter ranges. In this paper we propose methods
of controlling the bifurcation to extend the range of desirable period-1 operation, by taking advantage of the switching nature of such circuits. At the switching events, the evolution of perturbation is given by the so-called ”saltation matrix” and hence it is possible to influence the Floquet exponents by manipulating this
matrix. In physical terms this implies controlling the triangular wave used in the pulse-width modulator, or using a control logic that uses voltage as well as current feedback. We demonstrate the resulting control of the bifurcation both by simulation and experiments.