中国电机工程学报2024，Vol.44Issue(24)：9786-9795,中插23,11.DOI:10.13334/j.0258-8013.pcsee.231652
非晶共模扼流圈的一种宽频精确建模方法及应用
A Broadband Accurate Modeling Method for Amorphous Common-mode Chokes and Its Application
摘要
Abstract
Due to the characteristics such as high saturation magnetic flux density and high magnetic permeability,common-mode chokes with amorphous cores are widely used in various switching power supplies to suppress electro-magnetic interference(EMI).Unlike ferrite common-mode chokes,the frequency dependence of the magnetic permeability of amorphous common-mode chokes is stronger,making its accurate modeling more difficult.A high-order model consisting of a basic RLC resonant circuit with three parallel RL branches was proposed based on admittance analysis for the common-mode paths of amorphous common-mode chokes.On this basis,a full circuit broadband model for amorphous common-mode chokes including both common-mode and differential-mode parameters was established.A method for obtaining model parameters by combining impedance calculation of characteristic point with numerical fitting was provided.The Simulated and measured results verified that the model has high accuracy in the wide frequency range of 100 kHz～100 MHz,with common-mode impedance error less than 1 dB.Finally,the model was applied to EMI prediction of a push-pull converter,reducing the simulation error of the EMI filter's common-mode insertion loss from 100 kHz to 10 MHz.The measured and simulated common-mode spectrum have good consistency from 150 kHz to 30 MHz,which indicates the effectiveness of the high-order model.关键词
共模扼流圈/非晶/电磁干扰/开关电源/共模噪声Key words
common-mode choke/amorphous/electro-magnetic interference(EMI)/switching power supply/common-mode noise分类
信息技术与安全科学引用本文复制引用
郭梦妍,王勇,朱会强,满明远,惠琦,陈乾宏,任小永..非晶共模扼流圈的一种宽频精确建模方法及应用[J].中国电机工程学报,2024,44(24):9786-9795,中插23,11.基金项目
国家自然科学基金项目(52277185,52177181).Project Supported by National Natural Science Foundation of China(52277185,52177181). （52277185,52177181）
