一种双磁芯差共模电感集成EMI滤波器.pdf

第50卷第2期
电力电子技术
Vol50. No.2
2016年2月
Power Electronics
Feb,2016
种双磁芯差共模电感集成EMI滤波器
李洪珠2,张全,王悄,齐庆杰2
(1.辽宁工程技术大学,电气与控制工程学院,辽宁萌芦岛125105;
2.辽宁工程技术大学,安全科学与工程学院,辽宁阜新123000)
摘要:滤波电感集成是减小EMI滤波器体积的重要方法之一。在此提出了一种双磁芯差共模电感集成的EMI
滤波器结构,分析了共模与差模电感的集成原理,利用磁路分析推导了集成共模与差模电感计算公式,给出了
差共模集成电感的设计方法,并分析了磁芯磁阻不平衡对差共模电感的影响,给出了磁阻不平衡应满足的范
围。利用二端口模型建立了差共模电感二端口等效电路,并利用A参数矩阵推导了集成EMI滤波器插入损耗。
利用有限元分析提取了差共模电感的高颊参数,并与实验样机测试结果进行了对比,结果表明有限元分析法
获取的参数可以用于理论分析。利用频谱分析仪测试了集成EMI滤波器样机插入损耗测试曲线,测试曲线与
计算和仿真曲线对比结果表明,二端口建模理论分析的正确性与二端口等效电路的准确性。
关键词:滤波器;共模电感;差模电感;双磁芯集成
中图分类号:TN713
文献标识码:A
文章编号:1000-100X(2016)02-0097-04
An EMF Filter Integrated by Dual Core Common-mode Inductance
LI Hong-zhu. 2, ZHANG Leil, WANG Qiao, QI Qing-jie
(1. The Faculy of Electrical and Control Engneeng Liaoning echc versity, Hud 125105, China
Abstract: One of the important ways to lower the volume of EMI filter is filter inductance integration. This paper pro
poses a EMI filter structure integrated by dual core common-mode inductance, analyzing the integration principle of
inductance in the common mode and dierential mode. Through the magnetic circuit analysis formulas of common
mode and diferena mode inductance ne red are deduced. The design method of integration inductance in the
common mode and differential mode is given. And the article analyzes the effeet of the core magmetic resistance un-
balance on Poor common-mode inductance, drawing a scope magnetic resistance unbalance should satisfied. Two port
equivalent circuit of Poor common-mode inductance is established based on two-port model. The insertion loss of EMI
filter integrated is deduced using a parameter matrix. Using the finite element analysis to extract parameters in high
frequency of the common-mode inductance, comparing results with the experimental prototype. The results show that
parameters obtained through the method of finite element analysis are applied to theoretical analysis. The insertion loss
curve of EMI filter integrated prototype is tested by spectrum analyzer, comparing it with the calculation and simula
tion curve, drawing a conclusion that the theoretical analysis of the two port modeling is of correctness and two port
equivalent circuit is accurate
Keywords: filter; common-mode inductance; differential mode inductance dual core integration
Foundation Project: Supported by National Natural Science Foundation of China(No. 51177067, 50607007
1引言
究,文献[3-?给出了研究结果,但均存在不足。在
MI滤波器通常由分立元件构成,一般占据此提出了一种双磁芯差共模电感集成EMI滤波
电源模块总体积的15%~20%。为减少开关电源的器结构,由单个磁芯构成差模电感磁路,双磁芯组
体积、提高功率密度,许多学者对EMI滤波器差
合实现共模电感磁路。
模电感和共模电感的集成进行了研究
2双磁芯差共槙电感集成原理
关于开关电源EM滤波器差共模电感集成硏2.1共模电感集成
两个环形磁芯差共模电感集成EM滤波器结
基金项目:国家自然科学基金资助项目(5117067,
50607007
构如图1所示。为说明原理,使用矩形磁芯绘制平
定稿日期:2015-08-31
面原理图,如图2所示。共模电感由单独绕在每个
作者简介:李洪来(1974-),男,黑龙江富人,博士研究磁芯上的自绕组N和共同绕在两个磁芯上的共
生,研究方向为电力电子及磁集成理论和电气安全。
绕组N。构成,两者为正向耦合。
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