One-dimensional spectral analysis techniques for multilevel PWM strategies

McGrath, B and du Toit Mouton, H 2016, 'One-dimensional spectral analysis techniques for multilevel PWM strategies', IEEE Transactions on Power Electronics, vol. 31, no. 10, 7362195, pp. 6910-6919.

Document type: Journal Article
Collection: Journal Articles

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Title One-dimensional spectral analysis techniques for multilevel PWM strategies
Author(s) McGrath, B
du Toit Mouton, H
Year 2016
Journal name IEEE Transactions on Power Electronics
Volume number 31
Issue number 10
Article Number 7362195
Start page 6910
End page 6919
Total pages 10
Publisher IEEE
Abstract This paper presents a novel spectral analysis technique for multilevel modulation. Conventionally, such analyses use a double Fourier series technique, but this approach can become intractable when complex reference waveforms (e.g., multilevel space vector offsets) and regular sampling processes are considered. In contrast, the strategy proposed in this paper separates the multilevel pulse width modulation (PWM) waveform into a spectral image of the reference, and sideband basis functions which are then expanded using a one-dimensional Fourier series. The coefficients of this Fourier series are defined by a one-dimensional Fourier integral that is simpler in form compared to the corresponding double integral associated with the double Fourier series. This analysis technique naturally incorporates regular sampling, and a discrete formulation is developed that enables complex PWM reference waveforms, including centered space vector offsets, to be solved. Results of this analysis are validated against previously published multilevel inverter double Fourier series results and matching switched simulations.
Subject Industrial Electronics
Keyword(s) Double Fourier
Pulse Width Modulation
Spectral Analysis
DOI - identifier 10.1109/TPEL.2015.2511154
Copyright notice © 2016 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
ISSN 0885-8993
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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