Analysis of random PWM switching methods for three-level power inverters

This paper presents a generalized theory which covers both two-level and three-level random pulsewidth modulation (RPWM) schemes. Various three-level RPWM schemes with low switching frequency are presented and compared with two-level schemes. Three-level RPWM schemes have less discrete harmonics and...

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Bibliographic Details
Published in:IEEE transactions on power electronics 1999-11, Vol.14 (6), p.1156-1163
Main Authors: Shrivastava, Y., Hui, S.Y.
Format: Article
Language:English
Subjects:
Acoustic noise
Continuous noise
Councils
Electronic switching systems
Electronics
Insulated gate bipolar transistors
Inverters
Modulation
Motor drives
Motors
Power system harmonics
Pulse duration modulation
Pulse inverters
Pulse width modulation
Pulse width modulation inverters
Spectra
Switching
Switching frequency
Theory
Thyristors
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Summary:This paper presents a generalized theory which covers both two-level and three-level random pulsewidth modulation (RPWM) schemes. Various three-level RPWM schemes with low switching frequency are presented and compared with two-level schemes. Three-level RPWM schemes have less discrete harmonics and continuous noise than two-level RPWM schemes. They have desirable spectral characteristics and can be employed in high-voltage inverter-fed motor drives. Measurements have confirmed the theory and the attractive features of three-level RPWM schemes.
ISSN:0885-8993
1941-0107
DOI:10.1109/63.803410