Sample-Averaged Zero-Sequence Current Elimination PWM Technique for Five-Phase Induction Motor With Opened Stator Windings

The five-phase dual-inverter connected to the five-phase open-end winding induction motor (FPOEWIM) with a single dc source could result in the flow of common-mode current (CMC) through the common dc bus and motor phase windings. In addition, the FPOEWIM drive contains third-harmonic content which do not contribute for torque generation in a distributed wound motor. So, to nullify the CMC as well as the third-harmonic content the sample-averaged zero-sequence current elimination (SAZE) pulsewidth modulation (PWM) technique is proposed in this paper. Wherein, the concept of alternative clamping of the inverters is used with the generation of virtual vector to eliminate third-harmonic content and the effective time region is moved to eliminate the CMC in average sense. The detailed analysis of the proposed SAZE PWM technique is presented along with the simulation results and experimental verification.