High efficiency paralleled three-phase current source front-end rectifiers for data center power supplies with current balancing and hot-swap

This paper develops a three-phase front-end power conversion stage for data center power supplies based on 400 V_dc power delivery architecture, which has been proven to have higher efficiency than traditional AC architectures. The front-end stage is based on three paralleled three-phase current source rectifiers, which have several benefits for this application. A control method is introduced for paralleled three-phase current source rectifiers to achieve balanced outputs and individual rectifier module hot-swap, which are required by power supply systems. By using SiC power semiconductors, the power conversion efficiency of the front-end stage is improved and the whole efficiency of the data center power supply system can be further increased.