A New Control Strategy for a Class of Multiple-Input DC-DC Converters

This paper proposes a new control scheme for a class of multi-input dc-dc power converters. The new control method is based on coupling the signals from independent control loops of conventional controller for a multi-port converter. In this paper, the non-restricted double input buck converter is introduced. The properties of this converter and its steady-state equations along with its small-signal model are reviewed. Next, the conventional control method is reviewed and the new control method is introduced based on coupling the voltage and current loops from the conventional controller. Then, the small-signal model of the converter with the new control method is analyzed and the converter transfer functions are derived. Finally, the converter transfer functions are used to find the output impedance of the converter in order to compare the performance of the new controller with the conventional controllers. Simulation results are provided to verify the results predicted by the small signal analysis.