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研究生:歐彥志
研究生(外文):Ou, Yenchih
論文名稱:纜線數據機雷擊保護之研究
論文名稱(外文):Study And Produce Of Cable Modem Surge Protect
指導教授:鄭超元鄭超元引用關係
口試委員:高文秀陳家宏
口試日期:2012-07-01
學位類別:碩士
校院名稱:聖約翰科技大學
系所名稱:電機工程系碩士在職專班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:70
中文關鍵詞:纜線數據機雷擊保護元件
外文關鍵詞:Cable Modemsurgesurge protect component
相關次數:
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  • 下載下載:12
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本文主要以探討HFC系統中纜線數據機設備之雷擊保護電路。一般的纜線數據機雷擊保護係利用各種過壓雷擊保護元件之反應時間、釋放能量方式、雷擊電流耐受力等為依據。纜線數據機中當置於前級雙工器前之雷擊保護元件無法有效保護後端線路而嚴重影響訊號傳輸及降低傳輸效率等深入研究探討。本文以實際實驗方式證明提出改善硬體電路對策,達到有效防護雷擊對設備造成的影響。
This study is to investigate the protection circuits of lighting surge on Cable Modem in Hybrid Fiber Coaxial system. The selections of the lighting surge protections applied on general cable modems depend upon the following factors. These include the response time, the energy release mode and the capacity of the surge current to be tolerated.
The study is to investigate the impact due to the failure of the surge protection component in front of the diplexer of the Cable Modem. The failure parts often can not effectively protect the back-end circuit. This affects signal transmission seriously and leads to lower transmission efficiency.
In this paper are using actual experimental approach to prove the hardware circuits proposed measures to improve the effective protection of the equipment caused by lightning surge impact.

第一章 緒論.................................................................................................... 1
1.1 緒言...................................................................................................... 1
1.2 研究動機與目標............................................................................................. 1
1.3 研究方法................................................................................................... 3
1.4 論文結構................................................................................................... 3
第二章 纜線數據機規範…………..…................................................................................. 5
2.1 前言...................................................................................................... 5
2.2 HFC 的發展................................................................................................ 5
2.3 Cable Modem 介紹 ......................................................................................... 7
2.4 纜線數據機標準規範(DOCSIS)............................................................................... 10
第三章 雷擊之成因.............................................................................................. 18
3.1 前言..................................................................................................... 14
3.2 落雷之成因................................................................................................ 14
3.3 落雷之過程................................................................................................ 18
3.4 落雷之結構................................................................................................ 19
3.4.1 前導放電與回擊現象....................................................................................... 20
3.4.2 多重雷擊現象............................................................................................ 22
3.4.3 雷擊電流函數............................................................................................ 22
第四章 雷擊測試規範............................................................................................ 26
4.1 前言..................................................................................................... 26
4.2 雷擊測試規範.............................................................................................. 26
4.2.1 實驗模式................................................................................................ 28
4.2.2 實驗模型................................................................................................ 29
4.2.3 實驗波形................................................................................................ 29
4.3 雷擊突波保護基本原理及保護元件.............................................................................. 31
4.3.1 突波保護元件............................................................................................ 32
4.3.2 突波保護元件特性比較..................................................................................... 35
4.3.3 共模及差模保護對策....................................................................................... 37
第五章 模擬雷擊測試............................................................................................ 39
5.1 前言..................................................................................................... 39
5.2 雷擊模擬設備簡介.......................................................................................... 40
5.2.1 操作面板……….......................................................................................... 42
5.2.2 測試波形設定說明......................................................................................... 42
5.2.3 輸出面板說明............................................................................................ 43
5.2.4 操作簡介............................................................................................... 44
5.3 高壓探棒................................................................................................. 45
5.4 示波器................................................................................................... 48
第六章 模擬實驗............................................................................................... 49
6.1 前言..................................................................................................... 49
6.2 測試環境架設.............................................................................................. 54
6.3 待測電感選擇.............................................................................................. 56
6.4 模擬測試及波形紀錄......................................................................................... 58
6.5 實驗結果驗證.............................................................................................. 63
第七章 結論................................................................................................... 66
7.1 總結..................................................................................................... 66
7.2 未來研究方向.............................................................................................. 66
參考文獻.......................................................................................................68

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http://www.brightking.com/doce/default.html
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http://www1.tek.com
[25]Oscilloscope DPO-3054
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