Single parameter based tuning of robust controllers for nonminimum and minimum phase switching systems applied to dcdc converters

Abstract

Switched Mode Power Supplies SMPS are used in many electric newlinepower supply systems to keep the output voltage as close as possible to a newlinedesired constant reference It is well known that openloop control can not newlinecope with steady state errors due to changes in the input voltage and load newlinevariations Also it is demanded that the ripples in the output voltage caused newlineby the periodic disturbances in the input voltage at frequencies in the audible newlinerange be less This is an issue of vital importance when a highquality dc newlinevoltage is demanded This can be interpreted as that the controlled converter newlinesystem must posses certain degree of robustness against system perturbations newlineThis thesis aims to present a single parameter based tuning newlinealgorithm for robust control and its application to DCDC converter Both newlinecommon methods of DCDC converter control namely the voltage mode newlinecontrol and current mode control are considered newline newline