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Performance Improvement of a Buck Converter using a End-order Space Dithered Sigma-Delta Modulation based Random PWM Switching Scheme  

Kim, Seo-Hyeong (아주대 전자공학과)
Ju, Seong-Tak (아주대 전자공학과)
Jung, Hea-Gwang (아주대 전자공학과)
Lee, Kyo-Beum (아주대 전자공학부)
Jung, Gyu-Bum (아주대 전기전자공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.14, no.1, 2009 , pp. 54-61 More about this Journal
Abstract
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.
Keywords
Sigma-Delta Modulation; Random PWM; Buck Converter; DC/DC converter;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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