Sequential switching series resonant converter with phase shift control

Properties of a two-section phase-shift-controlled sequential switching series-resonant converter with (and without) mutually coupled tank inductors are discussed. Results of computer simulation and prototype evaluation show that the low semiconductor switching stresses, typical of all resonant converters, are further reduced in this topology, and that highly reliable operation is indicated. Comparisons with conventional phase-shift-controlled topologies (i.e. without sequential switching) and with a PWM series-resonant converter are also presented