Symmetry recovery from the viewpoint of power and frequency by extended delay feedback control

Abstract

An application of nonlinear control to enhance the operation of dynamical systems is found in the literature. In particular, recent research achieved harmonics reduction by driving a single-phase AC/AC converter to a chaotic regime. However, the periodic symmetry of the output voltage is broken during this process. This paper proposes two single-phase AC/AC converters with a symmetry-recovery feature that allows the converters to work either in a chaotic or stable regime. The proposed method, which is based on the extended delay feedback control, found a direct impact to recover the symmetry on the distribution of the power density through the time-delayed input.