Characterization of bifurcation dynamics in multicell inverter

Abstract

This paper presents a characterization study of the bifurcation dynamics in the multicell inverter. Firstly, the instantaneous model of two-cell multicell series inverter is studied. Then, this inverter is controlled using a discrete time digital regulator that generates the switching signals of the inverter. To highlight the chaos dynamic behavior, a discrete time nonlinear model is established based on Poincaré map, and bifurcation diagram is proposed. This diagram can be used to predict certain instability phenomena as well as operating points and limitations supported by the system. Some simulation results are performed.