Elimination of harmonic spikes using second-order Space Dithered Sigma-Delta Modulation

Author

Kim, Seo-Hyeong ; Lee, Kyo-Beum

Author_Institution

Div. of Electr. & Comput. Eng., Ajou Univ., Suwon, South Korea

fYear

2009

Firstpage

1

Lastpage

10

Abstract

This paper proposes second-order SDSDM (Space Dithered Sigma-Delta Modulation) to suppress the harmonic spikes in power conversion. PWM (Pulse Width Modulation) normally operates with a fixed switching frequency, which causes power spectrum to be concentrated at multiples of the switching frequency. The proposed scheme is confirmed in the DC/DC converter. The experimental results show that the proposed method provides improved performance in reducing harmonic spikes caused by PWM while maintaining the low current ripples.

Keywords

DC-DC power convertors; power conversion; sigma-delta modulation; DC/DC converter; fixed switching frequency; harmonic spikes; power conversion; pulse width modulation; second-order space dithered sigma-delta modulation; Acoustic pulses; DC-DC power converters; Delta-sigma modulation; Electromagnetic interference; Noise shaping; Power system harmonics; Pulse width modulation; Pulse width modulation converters; Space vector pulse width modulation; Switching frequency; DC/DC converter; Harmonic Spikes; Random PWM; Sigma-Delta Modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2009. EPE '09. 13th European Conference on

Conference_Location

Barcelona

Print_ISBN

978-1-4244-4432-8

Electronic_ISBN

978-90-75815-13-9

Type

conf

Filename

5278801