A Predictive Control Strategy For Adaptive energy storage in ZVS phase-shift-modulated full-bridge converter topologies

This paper presents a predictive control strategy for a family of zero-voltage switching phase-shift-modulated dc/dc converters initially reported for fuel cell application. The proposed control method guarantees zero-voltage switching (ZVS) operation with minimal current overshoot in auxiliary branches for all the line and load transients. The suggested method is compared with switch voltage feedback control to validate the analysis. It is shown that the proposed approach offers close to three times faster response, and reduces current overshoot by 75%. The latter allows lower safety margins for switches and auxiliary branch components, which simplifies converter design, and reduces size, weight, and cost.