Resonant converters for pulsed electrochemical applications

Resonant converters offer an efficient alternative to linear supplies for pulsed electrochemical processes. This paper presents an open loop and closed loop comparison between the dc-dc series and series-parallel resonant converters for a pulsed 500 W load. Placing restrictions on the resonant tank parameters proves necessary to achieve continuous transient waveforms. Generalized averaging is applied to each converter with frequency control and the small signal models are compared. The closed loop system proves to be robust using a single mode proportional integral controller. The series-parallel resonant converter is shown to be favourable for this application due to its simpler output stage and a detailed design is presented.