電磁干擾濾波器的效能與頻率適用範圍皆受限於其所使用元件的寄生效應，此研究主要就是探討藉由三個互耦的電感器消除或降低電容器中由寄生電感所造成的寄生效應。論文中將先討論三個互耦電感器的等效電路與特性，發現經由適當參數值的選擇，可同時在其中的兩個端點產生等效的串聯負值電感，而這兩個負值電感可用來降低電容器中的寄生電感效應，如此便可有效改善電磁干擾濾波器的頻率響應。在論文中也將進一步討論完全消除寄生電感的設計方法，經由推演可得到使用此方法時，在高頻有著-60 dB/decade的共模頻率響應，而在差模頻率響應更是高達-100 dB/decade。

The suitable frequency range of electromagnetic interference (EMI) filters is always limited by the parasitic inductances and capacitances of components. The main object in this research is to develop design rules for lowering parasitic effects due to parasitic inductance of capacitor by using three coupled inductors. In this thesis, the properties and equivalent circuit of three coupled inductors are discussed first. It is found that two negative series inductances can be simultaneously obtained at two ports when the parameters of three coupled inductors are appropriately selected. These two negative inductances can be used to lower parasitic effect of capacitors. In other words, the EMI filter performance can be effectively improved by using this technology. Furthermore, method to completely reduce parasitic inductances is derived. The common mode insertion loss of this design is able to achieve at the rate of -60 dB/decade at high-frequency. For differential mode the insertion loss is even higher to the rate of -100 dB/decade.

致謝 …………………………………………………………………… I
摘要(中文) …………………………………………………………… II
摘要(英文) ………………………………………………………… III
目錄 ………………………………………………………………… IV
圖表目錄 …………………………………………………………… VI
第一章 緒論 ………………………………………………………… 1
1.1 研究動機 …………………………………………………… 1
1.2 研究方法 …………………………………………………… 2
第二章 EMI濾波器基礎理論 ……………………………………… 3
2.1 被動元件非理想特性 ………………………………………… 3
2.1.1 電感器非理想特性 ……………………………………… 3
2.1.2 電容器非理想特性 ……………………………………… 6
2.2 一般EMI濾波器設計 ………………………………………… 9
2.2.1 電感應用 ……………………………………………… 9
2.2.1.1 串聯於接地端 …………………………………… 9
2.2.1.2 共模抗流電感(common-mode choke) …………… 10
2.2.2 電容應用 ……………………………………………… 11
2.2.2.1 線對線電容 ……………………………………… 12
2.2.2.2 線對地電容……………………………………… 13
2.2.3 雙耦合電感消除單電容器寄生電感 ………………… 14
第三章 雙寄生電感補償理論與設計方法 ……………………… 16
3.1 三個互耦電感基礎理論與等效電路 ……………………… 16
3.2 三個互耦電感應用於EMI濾波器設計 …………………… 20
3.3 寄生電感完全補償電路設計法則 ………………………… 26
第四章 補償電路設計與實測比較 ……………………………… 32
4.1 模擬結果比較 ……………………………………………… 32
4.2 實作量測與模擬比較 ……………………………………… 35
4.2.1 互耦電感器製作 ……………………………………… 35
4.2.2 理論模型模擬與實作量測比較 ……………………… 38
第五章 結論 ……………………………………………………… 42
參考文獻 …………………………………………………………… 43

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