The Three-Terminal Converter Cell, Graphs, and Generation of DC-to-DC Converter Families

With the use of graphs, the three-terminal converter cell concept was extended into a systematic topology generation method for two-stage PWM dc-to-dc power converters. The converter cell may include any number of reactive elements and switches. Any operable dc-to-dc converter (a seed) generates a family of operable converters by flipping converter-cell terminals. General conversion ratio formulas were proposed depending on the flipping operation: inversion, input, or output flipping. The positive super-lift (SL) converter served as a synthesis example, deriving the negative SL converter, and four new operable converters, one of which was verified experimentally.