A proportional plus extended time-delayed feedback controller for a PWM inverter

PWM current-mode single phase inverters are known to exhibit bifurcations and chaos when parameters vary. Our aim in this paper is to show how to apply a control method issued from chaos theory, in order to extend the stability range of a commonly used linear controller. To accomplish this aim, an extended time-delayed feedback controller (ETDFC) is used in conjunction with the proportional controller. An obvious advantage of this method is the robustness and ease of implementation because it does not require the knowledge of an accurate model but only the period of the target unstable periodic orbit (UPO).