Resonant Multi-input/Multi-output/Bidirectional ZCS Step-Down DC--DC Converter With Systematic Synthesis for Point-to-Point Power Routing

A new resonant zero-current switching (ZCS) multi-input/multi-output (MIMO) converter is presented. The proposed converter routes power from every desired input port to every desired output port independently. Capability of bidirectional operation is also provided. All semiconductor devices operate under the soft-switching conditions independent from operating voltage and output power. Power budgeting for the inputs, individually voltage regulation for the outputs, and internal voltage balancing for the bidirectional ports are attained with few power-element count. The system is synthesized systematically based on a topology belonging to the family of switched-resonator converters (SwRCs). No transformer is utilized, and common ground exists between all ports. The concept of route matrix is developed to determine the power multiplexing paths. This method greatly simplifies the analysis, design, and control of the proposed system. Mathematical formulation based on route matrix is given in detail. Circuit analysis, design procedure, and five different designs along with simulation and experimental results are presented.