Suppression of harmonic spikes in switching converter output using dithered sigma-delta modulation

Author

Bae, Chang Han ; Ryu, Joon Hyoung ; Lee, Kwang Won

Author_Institution

Dept. of Electron. Eng., Ajou Univ., Suwon, South Korea

Volume

38

Issue

1

fYear

2002

Firstpage

159

Lastpage

166

Abstract

In this paper, dithered sigma-delta modulation is proposed as an effective modulation scheme for a switching converter, to suppress harmonic spikes. The proposed scheme has a simple configuration, which comprises a first-order sigma-delta modulator and a random dither generator. The first-order sigma-delta, modulator produces a switching pulse waveform that has the same low-frequency component as the reference input. Also, the random dither disperses the switching frequency of output pulse waveform, which results in reduction of harmonic spikes. The relationship between the harmonic spectra and sampling numbers per switching cycle is studied through computer simulations, and performance is confirmed in an experimental setup

Keywords

harmonic distortion; harmonics suppression; power conversion harmonics; sigma-delta modulation; switching circuits; computer simulations; dithered sigma-delta modulation; first-order sigma-delta modulator; harmonic spectra; harmonic spikes suppression; low-frequency component; random dither generator; sampling numbers; switching frequency; switching power converter output; switching pulse waveform; Computer simulation; Delta-sigma modulation; Pulse modulation; Pulse width modulation; Random number generation; Sampling methods; Signal sampling; Space vector pulse width modulation; Switching converters; Switching frequency;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.980370

Filename

980370