An Open-End winding IM drive with Multilevel 12-sided Polygonal Vectors with Symmetric Triangles

Kaarthik, Sudharshan R and Gopakumar, K and Mathew, Jaison and Undeland, Tore (2014) An Open-End winding IM drive with Multilevel 12-sided Polygonal Vectors with Symmetric Triangles. In: 16th European Conference on Power Electronics and Applications (EPE-ECCE Europe), AUG 26-28, 2014, Lappeenranta, FINLAND.

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Abstract

Multilevel inverters with hexagonal voltage space vector structures have improved performance of induction motor drives compared to that of the two level inverters. Further reduction in the torque ripple on the motor shaft is possible by using multilevel dodecagonal (12-sided polygon) voltage space vector structures. The advantages of dodecagonal voltage space vector based PWM techniques are the complete elimination of fifth and seventh harmonics in phase voltages for the full modulation range and the extension of linear modulation range. This paper proposes an inverter circuit topology capable of generating multilevel dodecagonal voltage space vectors with symmetric triangles, by cascading two asymmetric three level inverters with isolated H-Bridges. This is made possible by proper selection of DC link voltages and the selection of resultant switching states for the inverters. In this paper, a simple PWM timing calculation method is proposed. Experimental results have also been presented in this paper to validate the proposed concept.

Item Type:	Conference Proceedings
Series.:	European Conference on Power Electronics and Applications
Publisher:	IEEE
Additional Information:	Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Keywords:	Adjustable speed drive; Multilevel converters; Pulse Width Modulation (PWM); Voltage Source Inverters (VSI); Induction motor
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	31 Oct 2015 05:41
Last Modified:	31 Oct 2015 05:41
URI:	http://eprints.iisc.ac.in/id/eprint/52623

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