低损耗可控阻尼两级LC输入滤波器设计与仿真

Design and Simulation of Two-Stage LC Input Filters with Low Loss and Controlled Damping

从限制滤波器暂态谐振峰值和保证稳态滤波效果的观点出发，提出了一种低损耗可控阻尼两级LC输入滤波器，详细论述了该滤波器的设计方法和参数选取。采用PSPICE仿真软件，获得了滤波器暂态过程谐振峰值与滤波器参数间的定量关系曲线和稳态滤波效果，仿真结果与理论计算结果一致。该滤波器具有可控谐振峰值、高衰减、低损耗等优点，在开关型DC／ DC和DC／ AC功率变换场合具有重要应用价值。

A two-stage LC input filter with low loss and co ntrolled damping is proposed in this paper,in order to limit the filter transien t resonant peaking and have good steady filtering effect.Design method and compo nent parameter selections of the filter are carefully presented.Resonant peaking of the filter relation to the filter parameter during line transients and filtering effect during steady state are given by using PSPICE simulation.The th eoretical computing result is verified by the simulation result.The two-stage LC input filter has the merits such as controlled resonant peaking,high attenua tion,low loss,and has important application value on switching DC/ DC conversion s and DC/ AC inversions.