Impact of component losses on the efficiency of the bi-directional current doubler rectifier based isolation-stage

This paper presents a detailed analysis of the bi-directional current doubler rectifier (CDR) that is a good candidate for use in a power electronic transformer (PET). Among various advantages the current doubler rectifier offers a bi-directional power flow capability that is the major requirement for the PET. This paper provides the steady state analysis of the CDR in the bi-directional operation. In addition, the impact of the component losses on the efficiency is analyzed. Finally a suitable snubber circuit is proposed to damp the voltage peaks.