New phase shift modulator for resonant converters

Resonant converters are important in the search for high efficiency energy use and low electromagnetic interference (EMI). In this paper, nonlinarities of the traditional phase shift modulator (PSM) application to resonant converters are addressed. A new modulator topology, suited for resonant converters, is proposed. It allows input-to-output linearity, bipolar input signals, and cumulatively a sinusoidal carrier, that can be achieved by filtration of any other pre-existent wave. A prototype has been constructed and experimental results are presented, showing the feasibility of the proposed modulator.