Novel random PWM schemes with weighted switching decision

Author

Hui, S.Y.R. ; Sathiakumar, S. ; Sung, Ki-Kwong

Author_Institution

Sydney Univ., NSW, Australia

Volume

12

Issue

6

fYear

1997

fDate

11/1/1997 12:00:00 AM

Firstpage

945

Lastpage

952

Abstract

A new random pulse-width modulation (RPWM) scheme, which includes a weighted decision switching process, has been developed and tested. The switching strategy can be applied to the entire range of the modulation index. The scheme combines the advantages of the deterministic nature of the standard pulse-width modulation (PWM) schemes, and the nondeterministic spread-spectral characteristic of RPWM schemes. Test results have confirmed the improved spectral performance of the proposed schemes over a standard RPWM scheme at both low- and high-modulation indexes

Keywords

AC motor drives; PWM invertors; switching circuits; deterministic nature; drives; high-modulation index; inverter fed AC drives; low-modulation index; nondeterministic spread-spectral characteristic; power invertors; random pulse-width modulation; switching strategy; weighted switching decision; Acoustic noise; Acoustic pulses; Power system harmonics; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Random number generation; Space vector pulse width modulation; Switching frequency; Testing;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.641492

Filename

641492