Three-phase induction motor drive with reactive power injection to supply

In this paper, a field oriented control system of a three-phase induction motor with the ability to achieve operation at lag, unity, and lead supply power factor is presented. The proposed control system allows the three-phase induction motor drive to absorb, not absorb, or inject a reactive power to the excitation source. Therefore, three-phase induction motor with the proposed control technique can be used to allow supply power factor improvement beside its basic operation as a driving force in industrial or other applications. Also, the proposed control system provides supply currents with low harmonic contents. This means a reduced total harmonic distortion (THD) is obtained. Simulation results are presented showing the effectiveness of the proposed control system.