Triple-Phase Shift Modulation for Dual Active Bridge based on Simplified Switching Loss Model

This paper proposes and analyzes triple phase shift modulation techniques aiming at maximizing the efficiency of the dual active bridge (DAB) converter. The DAB converter finds natural application in smart dc power systems integrating renew-ables and energy storage systems, for which loss minimization is crucial. This paper shows that the investigated modulation schemes allow converter efficiency improvements by exploiting complete or partial zero-voltage switching in a range of operating conditions as wide as possible, similarly to other papers in the literature based on triple phase shift modulation. Distinctively, the approach presented herein is based on simple converter modeling and the characterization of the switching elements. Experimental results are reported showing the performance attained by the proposed techniques considering a 1.5- kW converter prototype.