An Isolated Multi Active Bridge Type Soft Switched AC-DC Boost PFC Converter

This paper proposes a circuit topology for inte-grating multiple DC ports with an AC grid with galvanic isolation between every port. The proposed circuit topology is a Multi-Active Bridge (MAB) type soft-switched AC-DC boost PFC converter. A control strategy suited for battery charging application is presented. A unified approach for modelling the converter for all operating modes and modulation strategies is presented, which is used to determine the power flow, AC port currents, and soft-switching bounds. Experimental results from a 500 W laboratory hardware prototype are presented to validate the converter operation and control strategy.