DC-DC AND DC-AC Parallel Switched-Linear Converters

Abstract

This paper presents two voltage source converters (VSC) that were designed by joining a switching converter and a linear amplifier connected in parallel. The advantage of this structure is that it mix the best characteristics of the two converters. The lifetime is increased by removing the output capacitor. Other features of the converters include quick responses to load transients, very low ripple, high efficiency, high fidelity and reliability of the output voltage. This paper will present a DC-DC and a DC-AC structures that are connected in parallel with a linear amplifier. The DC-AC proposed system divides currents in the converters into the desired proportions, implements overcurrent protections, mitigates the circulating currents, provides the selection of the current band that each group of converters operates and minimizes losses.