Common duty ratio control of series resonant dual active bridge converter

A common duty ratio control method, which features zero voltage switching for all devices of input inverting H bridge and zero current switching for all devices of output rectifying H bridge, for series resonant dual active bridge converter is proposed in this paper. The detailed operation principles of the common duty ratio control method are presented. Moreover, the steady state of the converter is analyzed. The output voltage will not change under wide load variation even without voltage control loop and the converter shows the rigid output characteristic under the common duty ratio control. At last, the MATLAB model is constructed and the simulation results verify the theoretical analysis.