Domestic Journals Seo-Hyeong Kim, Seong-Tak Ju, Hea-Gwang Jung, Kyo-Beum Lee, and Gyu-Bum Jung, "Performance Improvement of a Buck Converter using a 2nd-order Space Dithered Sigma-Delta Modulation based Random PWM Switching Scheme," The Transactions of the Korean Institute of Power Electronics, vol. 14, no. 1, pp. 54–61, Feb. 2009.
2009
본문
This paper proposes the 2nd-order SDSDM (Space Dithered Sigma-Delta Modulation) for performance improvement of a buck
converter. The PWM (Pulse Width Modulation) has a drawback in that power spectrum tends to be concentrated around the
switching frequency. The resulting harmonic spikes cause a EMI(Electromagnetic Interference) and switching loss in semiconductor,
etc. The 1st-order SDSDM scheme is a kind of DSDM for reducing these harmonic spikes. In this scheme, a switching frequency is
spread through random dither generator placed on input part. In experimental result, the proposed 2nd-order SDSDM is confirmed
by applying to a buck converter.
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