Analysis of SiC MOSFET-Based Phase-Shift and Quasi Square Wave Modulated Dual Active Bridge Converter for on-Board Charging Application

The dual active bridge (DAB) converter is a bidirectional dc-dc converter having wide range of applications such as in renewable energy systems, electric vehicles (EV), dc microgrids, etc. This paper presents a SiC MOSFET-based phase shifted and quasi-square-wave modulated (PSQSWM) DAB converter for on-board charging application. There is more flexibility in controlling the active power flow in the converter by introducing a phase shift between the carriers of the two bridges as well as changing the width of the switch gate-pulses in one of two bridges. The different modes of operation have been discussed and MATLAB-Simulink digital simulation platform has been used verifying the control of the DAB converter.