摘要
研究一种采用Boost变换器和半桥变换器级联所构成的功率因数校正(power factor correction,PFC)变换器拓扑,其工作在电流连续模式(continue current mode,CCM)模式下,仅在半桥变换器输出端使用储能电容补偿瞬时输入输出功率的不平衡。半桥变换器桥臂电容作为Boost变换器输出端电容。通过适当的控制策略,降低了容值,无需高耐压等级的电解电容,提高了电路工作的可靠性。变压器漏感参与谐振,实现了半桥变换器功率管的软开关。分析PFC变换器的电路拓扑,给出前后级的控制逻辑关系,讨论软开关实现的条件以及减小电容规格的可行性,给出仿真及实验结果,证明该变换器具有良好的性能,满足GJB181A的要求。
This paper investigated on a power factor correction（PFC） converter composed of a Boost converter and a half-bridge converter.It works in the continue current mode（CCM） mode,and only in the output of the half-bridge converter it has the energy storage capacitor to balance the instantaneous power.The level of capacitors at the output of the Boost converter can be reduced with a reasonable control method.The leakage inductance of transformers performed resonant to achieve soft-switching effect.The topology of PFC converters,control logic,soft-switching conditions,and feasibility of capacitance reduction were discussed.The results of simulation and experiments showed that the PFC converter has a good property,which can satisfy the requirements of GJB181A.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第9期50-57,共8页
Proceedings of the CSEE
