Effects of X capacitors on EMI filter effectiveness

被引：43

作者：

Hsieh, Hung-I ^{[1
]}

Li, Jhong-Shu ^{[1
]}

Chen, Dan ^{[1
]}

机构：

[1] Natl Taiwan Univ, Taipei 106, Taiwan

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2008年 / 55卷 / 02期

关键词：

impedance mismatching; mix-mode (MM) electromagnetic interference (EMI) noise; noise current balancing;

D O I：

10.1109/TIE.2007.896258

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The suppression mechanism of the differential-mode noise of an X capacitor in offline power supplies is, for the first time, attributed to two distinct concepts: 1) impedance mismatch (regarding a line impedance stabilization network or mains and the equivalent power supply noise source impedance) and 2) C(dv/dt) noise current balancing (to suppress mix-mode noise). The effectiveness of X capacitors is investigated with. this theory, along with experimental supports. Understanding of the two aforementioned mechanisms gives better insight into filter effectiveness, which may lead to a more compact filter design.

引用

页码：949 / 955

页数：7

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