Basic design principle of current-fed energy injection converters

This paper proposes a new method for designing high frequency switching mode resonant converters based on energy injection control instead of traditional forced switching conversion, and summarizes some basic principles for designing current-fed energy injection converters. Three example topologies of current-fed energy injection converters based on these principles are presented. In addition, two existing push-pull and class E converters are analyzed from the perspective of these principles too for comparison purposes. Besides, the advantages and disadvantages of voltage-fed and current-fed energy converters are outlined. Major obstacles for increasing the operating frequencies of current-fed energy injection converters are discussed, and the possible solutions suggested.