Investigating of bidirectional dc–dc converter in different operational modes and designing of component considering the minimum OVR and filter size

Abstract

This study investigates a bidirectional dc-dc converter. The energy transmission techniques are analysed. A design procedure based on output voltage ripple (OVR) and filter size is implemented on a bidirectional dc-dc converter. The OVR of the converter is analysed in different operation modes. The relations between the maximum OVR (MOVR) (the worst condition) and the converter component parameters are deduced, and the minimum inductance value is calculated to ensure the MOVR and filter size minimisation in both of the step-up and step-down operations. The effect of coupling coefficient of the coupled inductors on the OVR is investigated. Finally, experimental and simulation results are provided to validate the theoretical analyses.