Artificial neural network based PWM scheme for a quasi six-phase voltage source inverter

Multi-phase motor drive system are increasingly used due to their inherent advantages. Several topologies are investigated in the literature for multi-phase drive system. The most popular among them are five-phase and six-phase. In six-phase system two topologies exist. In one topology, the windings or phases are 60 degrees apart and called symmetrical six-phase system. The second topology has two sets of three-phases and is displaced by 30 degrees. This is called quasi-six-phase or dual three-phase. In this paper, Pulse Width Modulation (PWM) technique is described for a quasi six-phase voltage source inverter (VSI). The output of the inverter is two set of three-phases with 30 phase displacement. The proposed PWM is based on the artificial neural network concept. ANN method of PWM is highly useful for high switching frequency operation. Simulation results are provided to validate the proposed theory.