**3. Evaluation of the High-Power-Density Converter Topology**

The first step to develop a high-power density converter was to select the optimal converter topology combination for a back-to-back converter. It should potentially have the highest efficiency and power density while minimizing the size and weight of the AC-side filter. In this section, a comparison between different topologies, especially different multilevel converter topologies, was made. Power losses, modules' total sizes and weights, as well as filters' sizes and weights, were considered.
