一种新型小功率降压PFC电路的性能研究

A novel small power buck PFC circuit performance research

提出一种新型降压PFC电路,阐述其工作原理,通过仿真实验获得了开环条件和闭环条件下该电路的性能参数,并和传统CRM升压APFC电路作对比研究。实验验证了该新型降压PFC电路在低压小功率范围内比CRM升压APFC电路效率更高,而且使输出电压降到80 V以下,能有效抑制输出电压纹波,极大地减小了器件应力。

A novel buck power factor correction circuit was proposed and its operating principle was expounded.The performance parameters under the open and closed loop conditions were obtained by simulation test,and a comparative study against the CRM boost power factor correction circuit was performed.The experiment confirms that this new circuit has higher efficiency than the traditional CRM boost circuit in the low-voltage small-power situations.And it makes the output voltage less than 80 V,which can effectively restrain the ripple of the output voltage,and greatly reduce the device stress.