Harmonics reduction in DSC induction motors with two three-phase stator winding sets

A direct self control (DSC) strategy is applied to an induction motor with two three-phase stator winding sets. A remarkable reduction in the electrom agnetic torque harmonics, as well as a meaningful minimization of the machi ne current distortion, are evidenced with respect to a conventional inducti on motor. In traction applications! electromagnetic torque harmonics induce mechanical stress on the transmission apparatus and cause resonance phenom ena. On the other hand, current harmonics interact with signaling transmiss ion, deteriorating their quality. Both drawbacks are greatly reduced in the case of the DSC strategy applied to the proposed unconventional motor. The refore, the presented results are relevant in electrical traction, showing that the introduction of induction motors with two three-phase stator windi ng sets offers new interesting solutions.