Time-Domain Model of the Three-Phase SRC-DAB Resonant Converter

A three-phase series resonant dual active bridge converter is focused on in this paper. Different from the common modeling method with fundamental harmonic approximation and linearized modeling method, the analytical mathematical expressions of resonant current and voltage gain are derived by applying the time domain analysis modeling method. The influence of switching frequency and phase-shifted angle on the voltage gain is concluded and analyzed. The accuracy of this model is verified by hardware prototype.