Achieving Rated Power and ZVS for Dual Active Bridge Converter Considering the Interaction of Nonidealities

The transmitted power and zero-voltage-switching (ZVS) are two major concerns for dual active bridge (DAB) converters. They are influenced by some nonidealities in real applications, including MOSFET's nonlinear output capacitance, dead time in the bridges, as well as the mismatch between the transformer turns ratio and the input-to-output voltage ratio. Despite this, little work has been undertaken to give a detailed design method considering the interaction of these nonidealities. This article aims at achieving the rated power and ZVS for the DAB converter used as a dc transformer under single-phase-shift control by inductance range calculation. The interaction of these nonidealities is considered to select the inductance range for the first time. A 3.5–7 kW experimental prototype is built to verify the effectiveness of the proposed method.