Unipolar stitched inverter low-frequency harmonics caused by stitching delay

Sharma, R. and Ball, J. A. R. (2009) Unipolar stitched inverter low-frequency harmonics caused by stitching delay. IET Power Electronics, 2 (5). pp. 508-516. ISSN 1755-4535


Unipolar switched single-phase inverters experience lower switching losses and generate less electro-magnetic interference (EMI) when compared with bipolar switched inverters. However, these benefits come at the expense of increased distortion in the current waveform near the voltage zero crossing. Furthermore, it is demonstrated in this paper that circuit delay is a major cause of the generation of low-frequency harmonics (LFH). A new analytical method to explain why circuit delays are responsible for the generation of LFH in unipolar switched inverters, and not in bipolar switched inverters, is presented. Numerical results calculated from this theory are compared with simulation and experimental results to illustrate this relationship.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 18 Mar 2010 07:38
Last Modified: 29 Aug 2014 05:55
Uncontrolled Keywords: electromagnetic interference; harmonic analysis; invertors; numerical analysis
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
01 Mathematical Sciences > 0101 Pure Mathematics > 010106 Lie Groups, Harmonic and Fourier Analysis
09 Engineering > 0906 Electrical and Electronic Engineering > 090607 Power and Energy Systems Engineering (excl. Renewable Power)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1049/iet-pel.2008.0133
URI: http://eprints.usq.edu.au/id/eprint/7098

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