Improvement of EMI Filter Performance with Parasitic Coupling Cancellation
Improvement of EMI Filter Performance with Parasitic Coupling Cancellation
复制标题
通过消除寄生耦合提高 EMI 滤波器性能
DOI：
10.1109/pesc.2005.1581872
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
J. D. V. Wyk
中科院分区：
文献类型：
--
作者：
Shuo Wang;F. C. Lee;W. Odendaal;J. D. V. Wyk
在本文中，EMI滤波器中的关键寄生耦合首先确定。基于对滤波器寄生效应的理解，提出了通过消除临界耦合来提高EMI滤波器性能的方法。然后将抵消电感器与电容器集成以抵消两个电容器之间的互耦合以及集成电容器的等效串联电感（ESL）。该方法适用于矩形和管状电容器。两种不同的集成方法进行了比较。最后，原型的建立和测试的一级和两级EMI滤波器。实验结果表明，所提出的互耦抵消技术可以大大提高EMI滤波器的高频性能
In this paper, critical parasitic couplings in EMI filters are first identified. Based on the understanding of filter parasitics, methods are proposed to improve EMI filter performance by canceling critical couplings. A cancellation inductor is then integrated with capacitors to cancel the mutual coupling between two capacitors and the equivalent series inductance (ESL) of the integrated capacitor. The proposed method is applied to both rectangular and tubular capacitors. Two different integration approaches are also compared. Finally, prototypes are built and tested for both one-stage and two-stage EMI filters. Experimental results show the proposed mutual coupling cancellation technique can drastically improve EMI filter high frequency performance