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研究生:鄭瑞志
研究生(外文):Jui-Chih-Cheng
論文名稱:和差調變式DC-to-AC換流器之研製
論文名稱(外文):Realization Study of DC/AC Inverter by Sigma-Delta Modulation
指導教授:謝冠群
指導教授(外文):Guan-Chyun-Hsieh
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:自動化及控制研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2003
畢業學年度:92
語文別:中文
中文關鍵詞:和差調變式換流器
外文關鍵詞:Sigma-Deltaa ModulationInverter
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本論文提出一種以和差調變控制(Sigma-Delta Modulated Control, SDM)為基礎的直流/交流換流器(DC/AC Inverter)。和差調變控制器係由逐週比較積分迴路所構成,主要結構包含了一積分器、一取樣保持電路及一比較器等,和差調變器可依參考信號轉換為適當的連續脈波信號,作為驅動開關之用。由於控制器係直接追蹤輸入參考信號,可以達到輸出可程式化的目的。換流器的電力級採用全橋H型架構,經由一對上邊和下邊驅動電路裝置而形成;輸出波形的合成僅需經過一個簡單的 型濾波電路就可達到降低諧波失真的目的,不需要外加其他電路。本研究實際設計製作一部1kVA換流器,輸出頻率可調範圍為16-2kHz,輸出電壓範圍為0至150Vrms,本換流器可依輸入參考信號波形得具電力能力之低失真輸出波形。換流器於重載時的效率可達93%以上,總諧波失真度在重載時未加EMI濾波器前皆在1.8%以下。
In this thesis, a sigma-delta modulated DC/AC inverter is proposed. The sigma-delta modulation (SDM) controller is formed by cycle-by-cycle integration loop with the desired signals. The SDM controller is simply composed of a differential integrator, a sample-and-hold device, and a two-level quantizer. The series-gated pulse train from the proposed SDM controller can be adapted to the waveform of the desired signal. Thus, a programmable output waveform is achieved according to the desired signal. A full-bridge H-diagonal topology is configured as the power stage. The synthesized waveform is easily acquired by a simple LC filter with low distortion and high accuracy. A 1kVA DC/AC inverter with output frequency varied from 16-2kHz is examined. The DC/AC inverter output voltage range is from 0-150Vrms. The power efficiency is up to 93% under rated power and the total harmonic distortion (THD) without EMI filter is less than 1.8%.
中文摘要…………………………………………………………………...I英文摘要…………………………………………………………………..II
誌謝………………………………………………………………………III
目錄……………………………...……………………………………….IV圖目錄……………………………………………………………………VI表目錄……………………………………………………………...……. X
第一章 緒論…………………………………………………………..…..1
1.1 研究動機…………………………………………………………...1
1.2 研究目的與貢獻…………………………………………………...2
1.3論文編排方式……………………………………………………...3
第二章 和差調變式換流器之原理…………….…………………..….....4
2.1前言…………………………………………………………….…..4
2.2傳統換流器調變技術介紹…………………………………….…..5
2.3 和差調變控制器的架構………………………………..…….….11
2.4 和差調變控制器的動作原理………………………….…….......12
2.5 和差調變控制器的分析……….……………………….…….… 13
第三章 系統分析……………………………………………..…...…….27
3.1換流器之主電路架構介紹………………………………….……27
3.2全橋式換流器…………………………………………………….33
第四章 系統模擬………………………………………………………..39
4.1模擬之參數設定………………………………………………….39
4.2模擬結果………………………………………………………….41
4.3模擬數據分析…………………………………………………….48
第五章 設計實例及實驗結果…………………………………………..50
5.1實作電路之規格………………………………………………….50
5.2取樣信號頻率之選擇…………………………………………….51
5.3主電路之設計考量……………………………………………….52
5.4實驗數據與量測………………………………………………….58
5.5實驗結果分析…………………………………………………….65
第六章 結論……………………………………………………………..66
參考文獻…………………………………………………………………69
附錄……………………………...……………………………………….73
參考文獻
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