臺灣博碩士論文加值系統

本論文將利用功率結合/分離器分離出傳導雜訊之共模與差模成份來設計電磁干擾濾波器，文中介紹其動作原理，並針對主動電力濾波器提出一套合適的電磁干擾濾波器架構及其設計步驟，這些設計步驟減化了電磁干擾濾波器的設計過程。此外，本文將應用數位訊號處理器設計一主動雜訊濾波器，期能代替傳統之被動式電磁干擾濾波器。由於雜訊之成份無法預知，因此適應性濾波理論將是最適合實現主動雜訊消除之方法。文末分別介紹FIR LMS 及Filtered-X LMS 架構之演算法，並應用數位訊號處理器進行實驗以驗證理論之可行性。

In the thesis, a device is developed to decipher commode-mode noise and differential-mode noise from a conducted EMI noise measurement, its basic principles of the separator will be described. Based on the analysis of the conducted EMI source and equivalent circuit, an simplify design process and suitable EMI filter is described for a single-phase active power filter. Otherwise, an active noise filter is also designed based on digital signal processor. Since it is difficult to know the exact noise component, so adaptive filter theory is the most suitable one to realize the active noise cancellation. At the end of the thesis, the FIR LMS and Filtered-X LMS structure algorithm will be mentioned and use a digital signal processor to implement noise cancellation to show the realizability of the theory.

摘要 Ⅰ
英文摘要 Ⅱ
誌謝 Ⅲ
目錄 Ⅳ
圖表索引 Ⅶ
符號表 IV
第一章 緒論1
1.1 研究動機與目的1
1.2 論文大綱4
第二章 雜訊干擾型式與電磁干擾濾波器設計5
2.1 前言5
2.2 等效雜訊模型5
2.3 單相差模(Differential mode)干擾7
2.4 單相共模(Common mode)干擾7
2.5 共模干擾與差模干擾的傳播路徑8
2.6 電磁量測系統9
2.6.1 Model 3825/2 LISN 的簡介10
2.6.2 雜訊分離器12
2.7 電磁干擾濾波器設計15
2.8 濾波元件之特性18
2.8.1 電容18
2.8.2 電感20
第三章 主動式電力濾波器及電磁干擾濾波器22
3.1 前言22
3.2 主動式電力濾波器22
3.3 主動電力濾波器實驗結果25
3.4 電磁干擾濾波器之設計35
第四章 適應性雜訊消除系統40
4.1 前言40
4.2 適應性濾波器40
4.2.1 非遞迴式適應性濾波器41
4.2.2 遞迴式適應性濾波器45
4.2.3 訊號轉換技術使用的轉換基準適應性濾波器47
4.3 系統通道參數鑑別48
4.4 Filtered-X LMS系統架構49
4.5 系統架構51
4.5.1 Filtered-X LMS系統架構52
4.5.2 FIR LMS架構53
4.5.2-1 低通濾波器設計54
4.6 模擬波形58
第五章 數位訊號處理器及實驗結果65
5.1 前言65
5.2 數位訊號處理器65
5.2.1 類比/數位轉換器69
5.3 Q15 Mode轉換71
5.4 實驗結果72
第六章 結論與未來研究方向82
6.1結論82
6.2未來研究方向83
參考文獻84
自傳87
著作權聲明88

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