To address the issue of excessive current stress in dual-active-bridge (DAB) converters caused by mismatched input-output voltage regulation ratios in the dual-phase-shift (DPS) control

a novel segmented current stress optimization control strategy under DPS modulation is proposed. The strategy reduces current stress by lowering the inductive voltage

thereby improving system efficiency. First

the working principle of the novel DPS modulation is analyzed

verifying that reducing the inductive voltage can significantly reduce current stress. Then

considering different transmission power levels and voltage regulation ratios

the current stress in the corresponding operating ranges is optimized in segments. The optimal phase shift ratio combination under the minimum current stress is derived

and a closed-loop control strategy is designed based on the segmented optimization of current stress. Finally

a prototype of the DAB converter is built

and experimental validation is carried out. The results indicate that

compared to other optimized control methods

the proposed control strategy achieves lower current stress and backflow power in the low-to-medium power range

and provides faster dynamic response during load transients.