期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2013
卷号：2
期号：10
页码：3008-3014
出版社：IJECS
摘要：This paper presents a high step-down tranformerless single-stage single-switch ac/dc converter suitable for universal lineapplications (90–270 Vrms ). The topology integrates a buck-type power-factor correction (PFC) cell with a buck–boost dc/dc cell andpart of the input power is coupled to the output directly after the first power processing. With this direct power transfer feature andsharing capacitor voltages, the converter is able to achieve efficient power conversion, high power factor, low voltage stress onintermediate bus (less than 130 V) and low output voltage without a high step-down transformer. The absence of transformer reducesthe component counts and cost of the converter. Unlike most of the boost-type PFC cell, the main switch of the proposed converter onlyhandles the peak inductor current of dc/dc cell rather than the superposition of both inductor currents. Detailed analysis and designprocedures of the proposed circuit are given and verified byexperimental results
关键词：Direct power transfer (DPT); integrated buck–;buck–boost converter (IBuBuBo); power-factor correction;(PFC);single-stage (SS); transformerless
