抑制开关电源特定次谐波的快速响应TLCL滤波器的分析与设计  

Analysis and Design of Fast Response TLCL Filter for Switching Power Supply to Suppress Specific Subharmonics

作　　者：李思奇[1] 李哲 李通 鲁思兆[1] LI Siqi;LI Zhe;LI Tong;LU Sizhao(Department of Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan Province,China)

机构地区：[1]昆明理工大学电力工程学院,云南省昆明市650500

出　　处：《中国电机工程学报》2023年第11期4389-4397,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52067011,52067010)。

摘　　要：为有效抑制开关频率及其倍数次的谐波,提出一种TLCL滤波器拓扑结构。该拓扑结构在满足谐波衰减的要求下,可以减小滤波器的总电感值和最大总储能,同时提升系统的动态响应。考虑高频下电感的集肤效应,其高频下等效交流电阻大于直流电阻,对电路进行解耦分析,推导得出一种使得并联谐振支路(Lfn-Cfn)损耗最小的参数计算方法。减小滤波器的总存储能量,是缩小电感电容体积的一种有效方法,通过分析陷波频率处谐振电感电容中的储能增加量和其它支路电感电容储能的减少量,证明了TLCL滤波器可以减小最大总储能量,从而可减小滤波器的体积。最后,以Buck变换器为例,分析基于TLCL滤波器的Buck变换器和传统LC型Buck变换器的工作特性,通过仿真与实验验证TLCL滤波器理论分析和参数设计的合理性。In order to suppress the switching frequency and its multiple harmonics effectively,a trap-inductor-capacitor-inductor(TLCL)filter topology is proposed.This filter topology can reduce the total inductance and maximum total energy storage of the filter and improve the dynamic response of the system under the harmonic attenuation requirements.Considering the skin effect of inductance at high frequency,the equivalent AC resistance is greater than DC resistance at high frequency.The decoupling analysis of the circuit is carried out,and a parameter calculation method to minimize the loss of parallel resonant branch(L fn-C fn)is derived.Reducing the total storage energy of the filter is an effective method to reduce the volume of the inductor and capacitor.By analyzing the increase of the storage energy in the resonant inductor and capacitor at the notch frequency and the decrease of the storage energy in the inductor and capacitor of other branches,it is proved that the TLCL filter can reduce the maximum total storage energy,thus reducing the size of the filter.Finally,taking buck converter as an example,the operation characteristics of buck converter based on TLCL filter and traditional LC buck converter are analyzed.The rationality of the theoretical analysis and the parameter design of TLCL filter is verified by simulations and experiments.

关 键 词：TLCL滤波器 并联谐振 最大总储能 解耦分析 等效交流电阻 

分 类 号：TM46[电气工程—电器]