Multiphase-Multilevel Inverter for Open-Winding Loads

This research book focused towards a novel multiphase-multilevel ac motor drive system much suitable for low-voltage high-current power applications. In specific, six-phase asymmetrical induction motor with open-end stator winding configuration, fed from four standard two-level three-phase voltage source inverters (VSIs). Proposed synchronous reference frame control algorithm shares the total dc source power among the 4 VSIs in each switching cycle with three degree of freedom. Precisely, first degree of freedom concerns with the current sharing between two three-phase stator windings. Based on modified multilevel space vector pulse width modulation shares the voltage between each single VSIs of two three-phase stator windings with second and third degree of freedom, having proper multilevel output waveforms. Complete research work carried out includes hardware prototype model @ Alma Matter Studiorum (Nourishing Mother of University Studies, Oldest Continuing University in the World) 1088 A.D., University of Bologna, Department of Electrical, Electronics and Information Engineering, Viale Risorgimento - 2, Bologna - 40136, Italy (Europe).