標題: Single-Stage Soft-Switching AC-DC Converter With Input-Current Shaping for Universal Line Applications
作者: Liu, Yen-Ming
Chang, Lon-Kou
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: AC-DC converter;input-current shaping (ICS);single stage;soft switching
公開日期: 1-Feb-2009
摘要: In this paper, a novel single-stage soft-switching ac-dc converter for universal line applications is presented. Unlike the conventional single-stage designs, the proposed input-current shaping scheme is intentionally arranged to be charged in the duty-off time. With this design, the switch current stress in the duty-on time is significantly reduced. Meanwhile, this design produces ac modulation effect on the charging time of the boost inductor so that the input i-v curve drawn by the proposed converter has nearly linear relationship. Moreover, an active-clamp flyback-forward topology is used as the downstream de-de cell to alleviate voltage stress across the bulk capacitor. By deactivating the flyback subconverter and keeping the forward subconverter supplying the output power at light-load condition, the bulk-capacitor voltage can be alleviated effectively and guaranteed below 450 V in wide ranges of output load and line input (90-265 V(rms)). Experimental results, obtained from a prototype circuit with 20-V/100-W output, have verified that three achievements can be obtained simultaneously, including the compliance with the line-current harmonic regulations, the reliable alleviation of the bulk-capacitor voltage stress, and the substantially promoted conversion efficiency.
URI: http://dx.doi.org/10.1109/TIE.2008.2004392
http://hdl.handle.net/11536/7664
ISSN: 0278-0046
DOI: 10.1109/TIE.2008.2004392
期刊: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume: 56
Issue: 2
起始頁: 467
結束頁: 479
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