一种改进型固定关断时间PFC电路的研究  

Study of an Improved FOT-PFC Circuit

作　　者：葛健[1] 金龙[1] 徐捷[1] 

机构地区：[1]东南大学,电气工程学院,江苏南京210096

出　　处：《电力电子技术》2011年第9期98-101,共4页Power Electronics

摘　　要：为满足高性能功率因数校正(PFC)的需求,提出一种新型含补偿电路的固定关断时间(FOT)-PFC电路。分析了电路的工作原理,推导了改进电路的参数和设计方法。实验结果表明,经补偿后的FOT-PFC电路减小了输入电流波形的畸变,有效抑制了输出电压的瞬变,同时响应特性很快。输入电压有效值和负载功率在较大范围变化时,输入电流总谐波畸变率THD<25%,满足EN61000-3-2 Class-D的要求。A new fix-off time control circuit with compensating cells is proposed to meet requirements for the higher characteristics of power factor correction.The working principle is analyzed and the method of deriving parameters are given.The designed experiment shows that after inserting the compensation：the current distortion of the FOT-PFC cir-cuit is reduced,the sudden change of the output voltage can be fast controlled and even in the circumstances of large input voltage range and large load range,the THD of the input current can be limited under 25%,which meets the requirement of EN61000-3-2 Class-D.

关 键 词：功率因数校正 电流畸变 固定关断时间 电压前馈 

分 类 号：TM714.3[电气工程—电力系统及自动化]