PULSE-WIDTH MODULATED CONTROL OF THE FULL BRIDGE BUCK CONVERTER

Two approaches are examined for the design a pulse width modulated (PW M) feedback control scheme regulating a full bridge buck converter in both stabilization and AC signal tracking tasks. The first approach is based on a direct strategy for the specification of a static PWM feed back control which accomplishes asymptotic stabilization to a preselec ted constant operating point for the output capacitor voltage. The sam e approach is also examined for the asymptotic output tracking of AC r eference signals. The second approach, or indirect approach, proposes a dynamical feedback regulation scheme based on input inductor current stabilization or tracking using reference signals obtained via partia l inversion of the system dynamics. The indirect approach emphasizes t he use of Fliess' generalized observability canonical form of the aver age converter model.