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: | 1-二月-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 |
顯示於類別: | 期刊論文 |