Abstract
Applications such as under-sea power prefer dc current distribution in a series cable connection instead of dc voltage distribution due to the long distance and cable loss. Power converter modules employed in these scenarios have a constant current input. In this paper, steady state analysis and unique design considerations are presented for the series resonant converter topology with constant current input. Constraints on the resonant tank component selection and operating frequency are developed to achieve the desired load range for the given input current. Hardware results are provided based on an under-sea dc distribution scenario to verify the benefits of the analysis and design considerations for a 400 kHz, 500 W SRC with 1 A input current and 330 mA output current.
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