A New PWM Strategy Based on a 24-Sector Vector Space Decomposition for a Six-Phase VSI-Fed Dual Stator Induction Motor

This paper presents a new space vector pulsewidth modulation (SVPWM) technique for the control of six-phase voltage source inverter (VSI)-fed dual stator induction machines (DSIM).A DSIM is an induction machine which has two sets of three-phase stator windings spatially shifted by 30 electrical degrees and fed by two three-phase VSIs.Despite their advantage of power segmentation, these machines are characterized by large zero sequence harmonic currents, and in particular those of order 6k ± 1, which are due to the mutual cancellation between the two stator windings.The proposed SVPWM scheme, while easy to implement digitally, reduces significantly these extra stator harmonic currents.Experimental results, collected from a 15 kW prototype machine controlled by a digital signal processor are presented and discussed.