Analysis of Different Transition Techniques for Non-isolated Bidirectional DC-DC Converters

Abstract

This work is aimed at making an objective comparison of the mode transition techniques reported for the non-isolated bidirectional dc-dc converters (BDCs) such as synchronous buck converter, non-inverting buck-boost converter, dual active bridge (DAB), etc. The analysis is carried out by creating a mathematical models for these transition techniques. A comparison has been made based on the type of transition technique, time requirement, and other important factors to achieve a smooth transient response during start-up and mode transition (i.e., during reversal of power flow) operations. The analysis of the transition techniques has been validated through PSIM simulations as well as experimentation for 132 V and 330 V voltages at the input and output ports for 1.5 kW of output power.