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Dodecagonal space vector diagram using cascaded H-Bridge inverters

Das, A and Mathew, K and Patel, CR and Ramchand, R and Gopakuma, K (2010) Dodecagonal space vector diagram using cascaded H-Bridge inverters. In: Industrial Electronics (ISIE), 2010 IEEE International Symposium on , 15 November 2010 , Bari.

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This paper proposes the development of dodecagonal (12-sided) space vector diagrams from cascaded H-Bridge inverters. As already reported in literatures, dodecagonal space vector diagrams have many advantages over conventional hexagonal ones. Some of them include the absence of 6n±1, (n=odd) harmonics from the phase voltage, and the extension of the linear modulation range. In this paper, a new power circuit is proposed for generating multiple dodecagons in the space vector plane. It consists of two cascaded H-Bridge cells fed from asymmetric dc voltage sources. It is shown that, with proper PWM timing calculation and placement of active and zero vectors, a very high quality of sine-wave can be produced. At the same time, the switching frequency of individual cells can be reduced substantially. Detailed PWM analysis, one design example and an elaborate simulation study is presented to support the proposed idea.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 2010 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 19 Dec 2011 11:04
Last Modified: 19 Dec 2011 11:04
URI: http://eprints.iisc.ac.in/id/eprint/38945

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