This paper presents a new control system of the seven-phase induction machine supplied by three levels inverter, based on direct rotor field oriented control technique. The dynamic model of the machine shows that non-sequential currents producing no torque appear and degrade the quality of currents. Further, the fuzzy logic controller is proposed to regulate the mechanical speed and non-sequential components. The performance of the aimed system is analysed different acting conditions.

Keywords: Polyphase induction machine, Multilevel voltage source inverter, Robust control, Fuzzy logic controller, Non-sequential currents