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An asymmetric cascaded H-Bridge inverters for generating 12-sided polygonal space vector diagrams for Motor drives

Mathew, K and Patel, Chintan and Gopakumar, K and Das, Anandarup and Ramchand, Rijil (2011) An asymmetric cascaded H-Bridge inverters for generating 12-sided polygonal space vector diagrams for Motor drives. In: EPE: European Power Electronics and Drives Journal, 21 (1). pp. 21-28.

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Abstract

A new topology of asymmetric cascaded H-Bridge inverter is presented in this paper It consists of two cascaded H-bridge cells per phase. They are fed from isolated dc sources having a dc bus ratio of 1:0.366. Out of many space vectors possible from this circuit, only those are chosen that lie on 12-sided polygons. Thus, the overall space vector diagram produced by this circuit consists of multiple numbers of 12-sided polygons. With a proper PWM timing calculations based on these selected space vectors, it is possible to eliminate all the 6n +/- 1, (n = odd) harmonics from the phase voltage under all operating conditions. The switching frequency of individual H-Bridge cells is also substantially low. Extensive experimental results have been presented in this paper to validate the proposed concept.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to European Power Electronics And Drives Association.
Keywords: Cascaded H-Bridge inverters;voltage space vectors;induction motor drives
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Depositing User: Id for Latest eprints
Date Deposited: 30 Aug 2011 05:57
Last Modified: 30 Aug 2011 05:57
URI: http://eprints.iisc.ac.in/id/eprint/40046

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