Model and analysis on common-mode conducted EMI of a switched mode power supply

被引：0
|
作者：
He, Jun-Ping [1 ]
Chen, Wei [2 ]
Jiang, Jian-Guo [1 ]
机构：
[1] Dept. of Electrical Engineering, Tsinghua University, Beijing 100084, China
[2] Delta Energy (Shanghai) Company, Shanghai 201209, China
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2005年 / 25卷 / 08期
关键词：
Capacitors - Diodes - Electric rectifiers - Electromagnetic shielding - Electromagnetic wave interference - Transformer windings;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A common-mode EMI model of a single phase flyback switched mode power supply is built after detailed analysis about EMI sources, winding voltage and shielding roles of a transformer. Its effect is validated by experiments. Based on the model, the relationships about EMI sources, coupling capacitors and common mode EMI emission are expatiated. In order to restrain EMI produced by high frequency diode at output stage of power supply, a common mode transformer method and a compensation winding method are proposed and their effects are validated of experiments. The influence on common mode EMI by a synchronous rectifier is analyzed too.
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页码：50 / 55
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