Reduction in Current Harmonics and CMV in DTC Controlled Five-Phase Induction Motor

The five-phase induction motor (FPIM) is explored to improve its performance as far as current harmonics are concerned. The current harmonics are reduced by implementing the virtual voltage vectors (VVs). Each VV has two active VV (AVV). These AVV are selected based on the location of harmonic components (x-y components). These x-y components are generated in the FPIM when it is excited. These x-y components distort the phase currents of the machine. Along with distortions reduction the common-mode voltage (CMV) reduction is also carried out which improves reliability in the drive. Therefore in this paper a new direct torque control (DTC) method is proposed to control FPIM improving the phase current and also to reduce the CMV. In addition to current phase distortion reduction the proposed method maintain the fast dynamic operation of the machine.