Study and analysis of the effects of varied PWM techniques and power sharing ratios on the current ripple in open-ended, three-level traction motor drives

A dual inverter feeding an open-ended motor load is a feasible solution for high-power traction applications. The topology supplied from isolated DC sources has a power-sharing capability. Different pulse width modulation (PWM) techniques have been proposed for the dual inverter. The performance of these modulation schemes can be compared by analysing the current ripple output of the dual inverter drive. There are various methods in the literature to analyse the ripple content in the output current of the dual inverter. However, the existing work on ripple analysis has been done only for equal power sharing between the isolated DC sources. This study presents an output current ripple analysis for carrier-based PWM techniques for different power-sharing ratios. The variation in the current ripple with varied power-sharing ratios for different PWM techniques is demonstrated. The results to validate the analysis have been obtained using MATLAB/Simulink and real-time simulator. Based on the discussion, an optimal PWM technique under different sharing conditions has been identified.


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  • Accession Number: 01752319
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 17 2020 5:54PM