Parasitic Resistance Effect on Dual Active Bridge Converter

In this paper, the effect of the parasitic resistance on the operation of the dual active bridge (DAB) converter is investigated. Analytical equations of the input-output voltage characteristic for the single phase shift (SPS) and the triangular current (TC) modulation techniques, that consider the parasitic resistance on the secondary side, are proposed. The new equations are verified through simulations in Matlab/Simulink. In both SPS and TC modulations, the power transmission capability is reduced due to the parasitic resistance. Moreover, with SPS modulation, the maximum output voltage is obtained at different operating points if the parasitic resistance is neglected or not. On the other hand, the voltage characteristic has a similar trend with the TC modulation. Therefore, the control of the DAB needs to be adjusted to consider the parasitic components.