Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE
Conference_Location :
Palm Springs, CA
Print_ISBN :
978-1-4244-4782-4
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2010.5433377
