In this work, a new switched control strategy is proposed to deal with three-phase DC-AC power converters, also known as three-phase inverters. More specifically, a switching rule is designed to command the inverter switches, at each instant of time, assuring global asymptotic tracking to a reference trajectory. A guaranteed performance cost is also taken into account. The reference trajectory is related to a constant voltage in the inverter input and sinusoidal phase currents, synchronous with the phase voltages, leading to a unitary power factor. This reference trajectory must belong to a set of trackable trajectories to be determined. The design conditions are obtained from a Lyapunov function that depends on the system electrical angle and are based on the solution of a simple Lyapunov equation. Simulation results put in evidence the effectiveness of the proposed methodology.
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