开关电源共模噪声源内阻抗建模方法  

Modeling Method of Internal Impedance of Common Mode Noise Source in Switching Power Supply

作　　者：林苏斌[1] 陆文韬 张丽萍[1] 吴钦炜 LIN Subin;LU Wentao;ZHANG Liping;WU Qinwei(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350016,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350016

出　　处：《电器与能效管理技术》2021年第1期84-89,共6页Electrical & Energy Management Technology

基　　金：国家自然科学基金项目(51777036);国防科工局重点项目(B0202);福建省自然科学基金(2017J01479);晋江市福大科教园科研项目(2019-JJFDKY-36)。

摘　　要：以小型通信电源为研究对象,分析了共模噪声传输机理,明确了影响共模噪声源内阻抗的关键因素,提出了基于插入损耗法的共模噪声源内阻抗建模方法。基于提出的方法,准确提取开关电源的共模噪声源内阻抗参数,建立共模噪声源内阻抗高频等效电路模型。实验验证了共模噪声源内阻抗建模方法的准确性。Taking the small communication power supply as the research object,the transmission mechanism of common mode noise is analyzed,and the key factors affecting the internal impedance of common mode noise source are clarified.Through theoretical analysis,a common mode noise source internal impedance modeling method based on insertion loss method is proposed.Based on this method,the common mode noise source internal impedance parameters of switching power supply can be accurately extracted,and the high-frequency equivalent circuit model of common mode noise source can be established.Finally,the accuracy of the proposed method is verified by experiments.

关 键 词：共模噪声 内阻抗 滤波器 插入损耗 

分 类 号：TM572[电气工程—电器]