DocumentCode :
934961
Title :
Reduced harmonics PWM controlled line-side converter for electric drives
Author :
Holtz, Joachim ; Springob, Lothar
Author_Institution :
Electr. Machines & Drives Lab., Wuppertal Univ., Germany
Volume :
29
Issue :
4
fYear :
1993
Firstpage :
814
Lastpage :
819
Abstract :
The concept for a reduced-harmonics PWM modulator, as applied for the control of a line-side power converter for a variable speed AC motor drive, is described. The PWM algorithm determines the on-state duration of each switching vector based on the observation of the time-variable voltage reference vector. Since there is no reference made to a constant-frequency carrier signal, the generated pulse patterns become asynchronous. It is the essential property of this method to produce a quasicontinuous harmonic spectrum in which all frequency components have more or less equal magnitudes. This is an advantage as compared with carrier-based PWM control schemes that exhibit high-amplitude carrier and side-band components in their harmonic spectra. The emission of acoustic noise radiated from the AC filter inductor is reduced
Keywords :
AC motors; harmonics; machine control; power convertors; pulse width modulation; variable speed drives; velocity control; voltage control; AC filter inductor; PWM; acoustic noise; algorithm; harmonics; line-side power converter; machine control; quasicontinuous harmonic spectrum; switching vector; variable speed AC motor drive; velocity control; voltage control; AC motors; Electric variables control; Frequency; Power harmonic filters; Pulse generation; Pulse width modulation; Pulse width modulation converters; Signal generators; Space vector pulse width modulation; Voltage;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/28.232000
Filename :
232000
Link To Document :
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