Abstract
Applications such as undersea power prefer constant current dc distribution in a series trunk cable connection over dc voltage distribution in order to provide robustness against cable impedance and faults. Power converter modules employed in these architectures are connected in series and have a constant current input. In this paper, steady state analysis and a control strategy are presented for series connected resonant converter modules in a constant current dc distributed power system. The control strategy is developed to achieve stable operation of the system with no communications required among modules. Hardware results are provided for a system consisting of two series connected 100 kHz 500 W SRCs with 1 A trunk current and regulated output current.
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