Comparison of DCM and CCM operated resonant converters for high-voltage capacitor charger

Abstract

This paper describes the comparison of two a resonant converters for high-voltage capacitor charger which were designed based on a series resonant converter operating at a discontinuous conduction mode, and a continuous conduction mode, respectively. In addition to the investigation of general advantages and disadvantages of each topology as a high-voltage capacitor charger, a detailed implementation procedure and consideration depending on the analysis of losses, as well as the control characteristic of two resonant converters are discussed in practical manner. Based on the theoretical calculation and the PSpice simulation, two high-voltage capacitor chargers were developed with design criteria which aim to achieve the efficiency greater than 90% at the rated load operation. Finally, various kinds of experiments were performed and the results were provided in order to verify the design as well as to compare the charging efficiency and characteristics of two resonant converter topologies.