用直接功率转换改善单级PFCAC/DC变换器性能

Improve Single-stage PFC AC/DC Converters Performance by Applying Direct Power Transfer Technology

深入地分析了现有的应用直接功率转换(DPT)技术的单级PFC AC／DC变换器,阐明了它们的直接功率转换的原理和实现方法。分析表明,应用DPT技术不仅有效地降低单级PFC AC／DC变换器直流母线电压,而且较大程度地提高了效率,使其在小功率的应用中具有更大的前景。

The current topologies of single-stage PFC DC/DC converters with the direct power transfer (DPT) technology is analyzed, and the mechanism and implementation of the DPT technology are described. The result obtained the shows that applying DPT technology to the single-stage PFC AC/DC converters can not only effectively decrease their DC bus voltage, but also improve their conversion efficiency, so they are more promising in low power application.