NDLI: A novel simplex homotopic fixed-point algorithm for computation of optimal PWM patterns

Content Provider	IEEE Xplore Digital Library
Author	Han Huang Shiyan Hu Czarkowski, D.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Polytech. Univ. Brooklyn, NY, USA (Han Huang)
Abstract	A novel simplex homotopic fixed-point algorithm to solve the optimal PWM problem is introduced in this paper. The goal of optimal PWM is to select the switching instants (angles) in such a way that a waveform with a particular characteristic is obtained and a certain criterion is minimized. The algorithms, which have been given so far in the literature to address this problem, use off-line precalculations and look-up tables. The proposed algorithm transforms the nonlinear equations to a polynomial set, uses the simplex homotopic fixed-point approach to find the initial values of the roots, and then uses cubic iteration to refine the roots. The salient features of the algorithm presented in this paper are: high accuracy, fast speed (low computational cost), and robustness even when facing ill-conditioned cases. With typical contemporary DSP, this algorithm can be used to set amplitudes of several tens of harmonics within one cycle of the AC power waveform. Since the switching angles are calculated independently from each other, the algorithm can be easily implemented for parallel processing. This would enable its use in demanding waveform processing applications.
Sponsorship	IEEE Power Electon. Soc
Starting Page	1263
Ending Page	1267
File Size	317236
Page Count	5
File Format	PDF
ISBN	0780383990
ISSN	02759306
DOI	10.1109/PESC.2004.1355603
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-20
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse width modulation Polynomials Nonlinear equations Power system harmonics Chebyshev approximation Real time systems Voltage Computer science Costs Erbium
Content Type	Text
Resource Type	Article

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