Fuzzy variable structure controller for a three-phase rectifier with power factor correction

This work presents an alternative, the design of a fuzzy variable structure controller to have the line current in phase with the line voltage of a three-phase rectifier. This control strategy combines fuzzy and sliding mode control algorithms. Few fuzzy rules are used for this scheme. The fuzzy controller parameters are adjusted by using the VSC for a better response and robustness. The simulations of the three-phase rectifier with controlled current are carried out on a DSP and the result with the control scheme presented here offer higher robustness, it is easier to adjust and implement.