Universal Input Single-Stage Pfc Ac/Dc Converter With Reduced Dc-Bus Voltage Stress
High DC bus voltage stress and low conversion efficiency limit the practical application for single stage Power Factor Correction (PFC) AC-DC converter. This paper presents a cost-effective approach to alleviate these issues based on conventional BIFRED AC/DC converter. In the proposed topology, a Flyback transformer and a small serial connected inductor are implemented to replace traditional input PFC inductor, and a cost-efficient lossless snubber is also proposed to reduce the turn-off spike of the main switch. The experimental result of a 20v≰.5A prototype indicates that the proposed technique can suppress the DC voltage below 400V through the entire universal input range while keeping the efficiency and power factor stay above 81% and 0.95 respectively.
PESC Record - IEEE Annual Power Electronics Specialists Conference
Number of Pages
Article; Proceedings Paper
Source API URL
Wu, Wenkai; Qiu, Weihong; and Rustom, Khalid, "Universal Input Single-Stage Pfc Ac/Dc Converter With Reduced Dc-Bus Voltage Stress" (2002). Scopus Export 2000s. 2908.