Modelling and control of single-input and multiple-output modular converter systems

This paper introduces a modular single-input and multiple-output (SIMO) converter system achieved by an input-series and output-independent (ISOI) architecture, where the input of each modular converter is connected in series while the output is independent. The system can generate multiple outputs at different power and voltage levels. The system modelling and analysis are presented. The cooperative control scheme is proposed to achieve the independent power and voltage control among different outputs. Under this control strategy, the system features a modular distributed control architecture. Each modular converter is controlled by its own on-board controller without any global information. There is no cross-regulation or communication in the system. At last, the proposed control scheme is verified through simulation and experiment on a modular SIMO system consisted of three buck converter modules.