A Review of High-Voltage High-Step Down Isolated Converter Topologies

In this paper, various isolated topologies with high buck ratio, suitable for High Voltage (HV) power electronics systems are reviewed. A brief comparative analysis is carried out in terms of important performance indices, such as efficiency, size, and cost. From the analysis, a novel Asymmetric Half Bridge (AHB) topology is proposed which is most suitable solution for HV power electronics systems. The proposed topology has advantages in terms of improved power density and higher efficiency over conventionally used converters for high buck applications. Hence, steady state operation of the topology is verified experimentally at different operating points.