Single-stage power factor correction AC / DC converter research
|Course||Power Electronics and Power Drives|
|Keywords||Single-stage power factor correction Discontinuous current mode (DCM) Flyback converter Boost Converter Direct power transfer|
In low power applications , in order to reduce cost, single-stage power factor correction (PFC) technology more and more people's attention . Single stage PFC technique is the PFC converter and DC / DC converters together , sharing a switch and a control circuit , while improving the power factor and fast adjustment of the output voltage . In this paper, single-stage PFC technology for a more detailed analysis. Boost first studied the basic single-stage PFC converter , a detailed analysis of its working principle and characteristics , pointing out that existing single- stage PFC converter , you must solve two problems , namely how to improve the efficiency of the converter and control of intermediate storage able capacitor voltage at 450V or less. Simultaneous analysis of the Boost -type single-stage PFC converter topologies three ends and ends , and discusses the link between the two . Then a direct power transfer theory references (DPT), a new kind of power transmission can be realized directly in single stage PFC converter . Detailed analysis of the converter working principle and characteristics . The introduction of the direct power converter based on the principle pass , relative to the general single-stage PFC converter , it has higher efficiency and good power factor correction. While a single- stage PFC converter intermediate storage capacitor voltage limit value of 450V or less. Finally, using simulation analysis to verify the theoretical correctness proof of this new type of single-stage PFC converter than the average single-stage PFC converter and better performance .