基于耦合电感的软开关PFC电路  

Novel Soft-switched PFC Circuit With Coupling Inductor

作　　者：李文渝 邓焰[1] 陈桂鹏[1] 李广地 LI Wen-yu DENG Yan CHEN Gui-peng LI Guang-di(Zhejiang University, Hangzhou 310027, China)

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《电力电子技术》2017年第9期71-74,78,共5页Power Electronics

摘　　要：为抑制电网的谐波污染,必须使用功率因数校正(PFC)电路。对于体积与重量的追求,使得PFC的开关频率不断增加。就大功率Boost PFC电路而言,往往工作于电感电流连续模式(CCM),由于二极管的反向恢复作用使得Boost电路的开关管有着较为严重的开通损耗。在传统Boost PFC基础上,采用耦合电感构建了一条辅助支路,利用辅助支路的快速抽流作用可以实现主回路开关管的零电压开关(ZVS)。通过对耦合电感自感互感值、两开关管间死区的设计,可使得PFC在全范围实现软开关。以输入电压220 V输出功率3 300 W的电路为例,分析了其软开关范围与开关管死区的关系,并且给出耦合电感的设计方法。最后,通过实验验证了理论分析的正确性。Power factor correction（PFC） circuit is used to restrain harmonic pollution in the grid.For the purpose of size and weight decrease,the switch frequency is increasing.In large power Boost PFC ,the Boost converter always operates in continuous conduction mode（CCM）.The reverse-recovery of the diode increases the switching loss of MOSFET.This paper presents a new topology using coupling inductor to establish an auxiliary loop.By using the auxiliary loop,the ze- ro voltage switching（ZVS） of the main loop switch can be achieved.Through designing the self-inductance,mutual-in- ductance and dead time between the range of soft-switching and dead time is analyzed in the condition of 220 V input voltage 3 300 W output power PFC.And the design method of coupling inductance is presented.At last,the correctness of theoretical analysis is verified by experiment.

关 键 词：功率因数校正 耦合电感 软开关 

分 类 号：TM714.3[电气工程—电力系统及自动化]