基于APFC和谐振技术的高性能开关电源的设计与实现

Design of a High-performance SMPS with APFC Based on Resonant Topology

提出了一种双级电路结构的开关电源设计方案。前级采用APFC电路,实现了低输入电流谐波;后级采用LLC谐振电路,利用变压器的励磁电感,可使变换器在宽输入范围内实现软开关。试验结果证明,可实现较高的功率因数和效率。

This paper presents a two-stage structure of SMPS. APFC circuit achieved low input current distortion,LLC resonant converter realized soft-switching over the entire operating ,magnetizing inductance of transformer is utilized to widen input range.The experimentation result verifys high power factor and efficiency can be achieved.