Digital control of a soft switched interleaved boost converter

A battery discharger regulator has wide applications in space, power electronic field, photovoltaic systems, hybrid electric vehicles etc. The boost converter is one of the simplest topology used for a battery discharge regulator whenever isolation is not required. Input ripple reduction causes less power loss in the input path. So an interleaved boost topology was selected in order to compensate the ripple and to reduce the mass of the reactive components. A passive soft switching scheme was preferred. Interleaving two boost converters leads to the final structure of the converter. A closed loop control is provided to the whole system to cope up with the external errors that may occur. The current mode control allows the easy implementation of paralleling of the converters and interleaving of course reduces the output voltage ripple. A digital control is provided so as to reduce space. Simulation is done using PSEVI and the simulation results prove the voltage regulation of the converter as well as the zero voltage switching.