Title :
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
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;
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
