Estimating switching loss and core loss in dual active bridge DC-DC converters

Recently, several models have been proposed for dual active bridge (DAB) converters in the literature. This paper assumes the conventional phase shift modulation approach and proposes a new model that includes the switching and core losses. In the proposed methodology, the equivalent resistances representing switching loss and core loss have been appropriately derived and added to the final model. The resulting approach and model are simple to use for modeling DAB converters when considering non-ideal circuit components. The new model increases the accuracy of power and efficiency predictions over wide range of operating conditions. Simulations and experimental results are presented to verify and demonstrate the proposed methodology.