The Series-Load-Resonant Converter as a Shipboard Power System Interface: A Detailed Analysis

This paper presents the attributes, benefits, and characteristics of a series load resonant converter for use as an interface converter within a Navy combatant power system. The closed-form equations for three typical modes of operation are developed and presented. The equations for operation below resonant frequency are used to evaluate component stress in an effort to optimize existing hardware. The authors tabulate several methods of minimizing component stress via shifting the steady-state operating point from discontinuous to continuous. While evaluating the results from a modeling effort and proof-of-principle hardware, two undesirable sub-modes were uncovered and documented. The authors present avoidance strategies for these two sub-modes. Finally, the paper recommends the series load resonant topology for use as an interface converter between the high-power medium-voltage bus and the low-voltage ship service bus for the next generation Naval combatant.