摘要
共模扼流圈是EMI滤波器的核心元件,它的高频特征极大地影响了EMI滤波器抑制传导EMI噪声的性能,有必要建立共模扼流圈的高频模型,以便更准确地评估和预测EMI滤波器的性能。本文提出了基于150kHz～30MHz频率范围内的阻抗测量实现的共模扼流圈高频建模方法,并通过一个实例给出了它的高频集总参数模型,该模型包括了共模电感、差模电感、寄生绕组电容和等效的损耗阻抗等参数。最后通过比较共模扼流圈插入损耗的测量结果和仿真结果,证实了本文所提出的共模扼流圈高频建模方法。
The common mode （CM） choke is the comer stone of EMI filter design, and the high frequency characteristics of CM chokes will influence their performance of conducted EMI suppression significantly. In order to estimate the performance of EMI filters more accurately, it is useful to generate a high frequency model for CM chokes. This paper presents a procedure to build a high frequency model for CM chokes from impedance measurement in the frequency range of 150kHz-30MHz. As an example, a lumped parameter high frequency model is given, in which CM and differential mode （DM） inductances, parasitic capacitances and equivalent core loss resistances, etc. are described and determined based on measurement. The agreement of simulation and measurement results of insertion loss of a prototype validates the model.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第4期8-12,共5页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50077020)。
关键词
共模扼流圈
测量
共模电感
差模电感
寄生电容
CM choke, measurement, CM inductance, DM inductance, parasitic capacitance
