Abstract

This paper presents the torque ripple minimization in direct torque control (DTC) five-phase induction motor drive fed with three-level five-phase inverter. Selective space vector utilization in three-level five-phase inverter is investigated and compared with its two-level counterparts. In order to minimize the torque ripple, five-level torque comparator is presented which allows the utilization of full, half and zero voltage vectors. These voltage vectors utilization in three-level DTC not only minimizes the torque ripple but also the x-y stator flux distortion. Performance is evaluated through simulation and validated through experimental results.

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