Harmonic analysis of nondeterministic switching methods for DC-DC power converters

Author

Shrivastava, Yash ; Hui, S.Y. ; Sathiakumar, S. ; Chung, Henry Shu-Hung ; Tse, K.K.

Author_Institution

Dept. of Electr. Eng., Sydney Univ., NSW, Australia

Volume

47

Issue

6

fYear

2000

fDate

6/1/2000 12:00:00 AM

Firstpage

868

Lastpage

884

Abstract

The authors present a rigorous theoretical harmonic analysis of random pulse width modulation (RPWM) method and random pulse position modulation (RPPM) method for dc-dc converters. The theoretical relationships of discrete harmonics, continuous noise and output voltage ripple of the RPWM and RPPM schemes are established and compared with those of a standard deterministic PWM scheme in a buck converter. Limitations in the randomly switched dc-dc converters are highlighted. The theoretical predictions indicate that the randomized schemes generally have an inherent problem in achieving low output voltage ripple due to the low-frequency continuous noise within the pass-band of the converter filter. For dc-dc power conversion, the RPPM method offers much better output voltage performance than the RPWM method

Keywords

DC-DC power convertors; PWM power convertors; harmonic analysis; pulse position modulation; DC-DC power converters; buck converter; discrete harmonics; harmonic analysis; low-frequency continuous noise; nondeterministic switching methods; output voltage ripple; random pulse position modulation; random pulse width modulation; randomly switched dc-dc converters; Buck converters; DC-DC power converters; Harmonic analysis; Power harmonic filters; Pulse modulation; Pulse width modulation; Pulse width modulation converters; Space vector pulse width modulation; Switching converters; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/81.852940

Filename

852940