中国电机工程学报2017，Vol.37Issue(8)：2436-2445,10.DOI:10.13334/j.0258-8013.pcsee.160515
开关电源变压器传导共模EMI磁电综合模型
Magneto-electric Composite Model of Transformer for Conducted Common-mode EMI in Switching-mode Power Supply
摘要
Abstract
Previous transformer electromagnetic interference (EMI) models only take into account the capacitance effect, which is good in evaluating the EMI characteristic in lower frequency ranges. However, the errors become large between model analysis and experiment results in higher frequency ranges. The analysis of the mechanism in the transformer shows that the conducted EMI characteristic is affected by both stray electric and magnetic fields. The leakage magnetic field has an obvious effect on the impedance of common-mode (CM) conduction path. Based on the above analysis, a comprehensive transformer model for conducted CM noise characteristic was build by taking into account both the effect of distributed electrical field and leakage magnetic field. The new model indicates that the resonance between leakage magnetic field and the equivalent inductive and capacitive parameters of stray field are the key factors to affect EMI characteristic in high-frequency ranges for a transformer. The results of insert loss tests verify that the new model can improve the prediction precision and evaluation effect in higher frequency ranges.关键词
变压器模型/漏磁场/传导EMI/磁电效应Key words
transformer model/leakage magnetic field/conducted electromagnetic interference (EMI)/magneto- electric effect分类
信息技术与安全科学引用本文复制引用
林苏斌,陈为,董纪清,陈庆彬..开关电源变压器传导共模EMI磁电综合模型[J].中国电机工程学报,2017,37(8):2436-2445,10.基金项目
国家自然科学基金项目(51277032) （51277032）
高等学校博士学科点专项科研基金(20133514120009) （20133514120009）
福建省自然科学基金项目(2014J01178). Project Supported by National Natural Science Foundation of China (51277032) （2014J01178）
Specialized Research Fund for the Doctoral Program of Higher Education (20133514120009) （20133514120009）
Natural Science Foundation of Fujian Province (2014J01178). （2014J01178）
