Weight oriented optimal PWM in low modulation indexes for multilevel inverters with unbalanced DC sources

Author

Ahmadi, Damoun ; Zou, Ke ; Wang, Jin

Author_Institution

205 Dreese Lab., Ohio State Univ., Columbus, OH, USA

fYear

2010

fDate

21-25 Feb. 2010

Firstpage

1038

Lastpage

1042

Abstract

Selective harmonics elimination for the staircase voltage waveform generated by multilevel inverters has been widely studied for medium and high voltage applications. Most published strategies are for multilevel inverters with balanced dc levels and single switching per level. This paper proposes an Optimal Pulse Width Modulation (OPWM) method that utilizes equal area criteria and harmonic injection. In particular, for low modulation indexes, the weight oriented OPWM is proposed to determine switching angles to achieve accurate harmonic elimination.

Keywords

DC machines; PWM invertors; harmonics; equal area criteria; harmonic injection; low modulation indexes; multilevel inverters; selective harmonics elimination; unbalanced DC sources; weight oriented optimal PWM; DC generators; Difference equations; Distributed control; Drives; Flexible printed circuits; Medium voltage; Power system harmonics; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; Equal Area Criteria; Harmonics Injection; Optimal PWM; Weight Oriented;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE

Conference_Location

Palm Springs, CA

ISSN

1048-2334

Print_ISBN

978-1-4244-4782-4

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2010.5433377

Filename

5433377