摘要
传统两级功率因数校正(PFC)电路复杂、器件多、功率密度低,效率不是很理想,且成本高,难以应用到小功率消费类电子设备中而单级式PFC变换器则特别适用于小功率电子设备,但仍存在许多问题针对这些问题,人们提出了很多新的改进拓扑为此,对最近产生的单级PFC拓扑进行了分类总结,分析了他们的优缺点。
Because of ths complex circuit, number of devices, low power density, relatively low efficiency and high cost, convent(?)(?)nal two-stage PEC cireuits ca(?)ot be used widely in low power cousumer electronic eqiupments. While the sin-gle-stage PFC can satisfy can saltsfy that goal very well. However, single-stage PFCs still have a lot of shortcomings so that many new topologic improvement on single-stage PFC eireurts are presented. The several new topologies for single-stage PFC circuits are introduced, also their advantages and disadvantages arc pointed out. At last, a prediction about the development of the single-stage PFC is given.
出处
《电源技术应用》
2003年第5期211-214,共4页
Power Supply Technologles and Applications
