CONICET | Buscador de Institutos y Recursos Humanos

In this work, an average current mode control (ACMC) strategy based on a generalized predictive control (GPC) formulation for passive front-end (PFE) three-phase boost-type converters is proposed. A novel design procedure for the GPC strategy is introduced; it considers both the cost function and disturbance model as design parameters to set the controller´s dynamic response and robustness against component variations. A maximum robustness criterion was used for achieving stability down to a 70% inductance reduction with a maximum possible bandwidth. The proposed strategy was compared against both a PI and a predictive deadbeat (PDB) ACMC by means of both simulations and experimental results obtained from a 2kW converter prototype.Results show that the GPC presented much less closed loop performance variation with the converter operating point than the PI controller. Also, the proposed strategy is more robust than the PDB strategy, showing better transient response than the PDB with a 50% inductance reduction and remained stable for a 71% inductance reduction, while the PDB could not. Finally, the proposed strategy achieved a 1.4% output voltage load transient response for a 595W load power step, and a 2:8% output voltage line transient response for a 100V input voltage step, outperforming the existing state-of-the-art strategies.