Low-distortion variable-level PWM technique

Author

Agelidis, V.G. ; Goh, H.C.

Author_Institution

CRESTA, Curtin Univ. of Technol., Perth, WA, Australia

Volume

145

Issue

2

fYear

1998

fDate

3/1/1998 12:00:00 AM

Firstpage

73

Lastpage

78

Abstract

A multicarrier disposition pulse width modulation (PWM) technique that results in low harmonic distortion for a three-phase PWM inverter with a 5-level line-to-line output voltage waveform is discussed in the paper. Comparison with the conventional 5-level unipolar PWM technique for three-phase inverters reveals that the proposed strategy results in a high performance converter with minimised filter requirements since the amplitude of all harmonics is reduced. The resulting line-to-line voltage waveform has five levels at high and three levels at low amplitude modulation indexes (variable level). Harmonic analysis is presented, along with simulated and experimental results to support the theoretical considerations

Keywords

PWM invertors; harmonic analysis; harmonic distortion; 5-level line-to-line output voltage waveform; harmonic analysis; harmonics amplitude reduction; high performance converter; line-to-line voltage waveform; low harmonic distortion; low-distortion variable-level PWM technique; minimised filter requirements; three-phase PWM inverter; three-phase inverters;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:19981640

Filename

674839