Investigation of direct torque control system fed by modified cascade of multilevel voltage source inverter

Abstract

The application of Direct Torque Control (DTC) for an induction machine using modified cascade of five-level and six-level voltage source inverters has been presented. The configuration of this drive system includes a sampling scale predictive model of the induction machine and an inverter control system for the optimum transistor switching. Simulation results for a DTC system fed by 5-level and 6-level modified inverters in comparison to basic DTC system fed by 2-level inverter have been also presented.