Mixed Signals Based Control of a SiC Vienna Rectifier for On-Board Battery Chargers

The main aim of this work is to investigate the feasibility of implementing a low-cost mixed-signal based control solution for a SiC three-level Vienna rectifier addressing electric vehicle on-board battery charger applications. The proposed solution allows to achieve almost unitary power factor operation as well as higher control loop bandwidths and lower total harmonic distortions in comparison with standard all-digital implementation using low-cost digital platform. A detailed description of the combined digital-analog approach is provided, as well as an experimental validation of the proposed solution for a 12kW on-board battery charger.