电磁干扰
变压器
电磁屏蔽
转换器
电磁干扰
共模信号
噪音(视频)
降噪
电气工程
工程类
电子工程
物理
声学
电压
计算机科学
数字信号处理
人工智能
模拟信号
图像(数学)
作者
Yuchen Yang,Daocheng Huang,Fred C. Lee,Qiang Li
标识
DOI:10.1109/apec.2014.6803365
摘要
In this paper, the common mode (CM) EMI noise characteristic of three popular topologies of resonant converter (LLC, CLL and LCL) is analyzed. The comparison of their EMI performance is provided. A state-of-art LLC resonant converter with matrix transformer is used as an example to further illustrate the CM noise problem of resonant converters. The CM noise model of LLC resonant converter is provided. A novel method of shielding is provided for matrix transformer to reduce common mode noise. The CM noise of LLC converter has a significantly reduction with shielding. The loss of shielding is analyzed by finite element analysis (FEA) tool. Then the method to reduce the loss of shielding is discussed. There is very little efficiency sacrifice for LLC converter with shielding according to the experiment result.
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