Analysis of effective discontinuous decoupled PWMS for a four-level open end winding induction motor drive through stator flux ripple Online publication date: Thu, 18-Feb-2021
by Kalyan Kumar Koppolu; K. Anuradha; M. Surya Kalvathi
International Journal of Electric and Hybrid Vehicles (IJEHV), Vol. 12, No. 4, 2020
Abstract: Dual inverter fed open-end 3Ø induction motor drive (OEW-IMD) with different dc-link voltages can perform four-level (4L) realisation. Now the earlier scheme operates with high conduction losses and dv/dt at particular voltage symmetries that effects overall efficiency. This paper proposes the effective discontinuous decoupled SVPWM (EDDPWM) scheme, which deals the DD-PWM with a concept of effective time employment to high voltage side inverter and low voltage side inverter independently that are labelled as EDDPWM-1 and EDDPWM-2, respectively. A factor variable k relating to active time of vectors application is presented. For k is varied from 10% to 100% of individual inverters that effects both individual and net inverter voltage vectors of a dual inverter. Therefore, the effect of factor k on ripple content, harmonic spectra of motor currents for insight of torque ripple, and different characteristics are analysed. These proposed methods achieved flexible performance enhancement compared to previous methods.
Online publication date: Thu, 18-Feb-2021
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