Abstract

In this paper, an isolated bidirectional series resonant converter is proposed for transportation applications such as mid-size electrified airplanes. The proposed converter is capable of transferring the nominal power in both directions, either from the high voltage side to the low voltage side (step-down mode), or from the low voltage side to the high voltage side (step-up mode). Using time-domain analysis it is shown that the converter transfers full power over the entire range of terminal voltages with guaranteed soft switching for all the voltage and power levels. No extra components, active or passive, is used for soft switching. Effectiveness of the modulation scheme in achieving zero current switching was experimentally confirmed.

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