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研究生:林宏澤
研究生(外文):Hung-Tse Lin
論文名稱:新型空間向量調變技術於過調變區與減少低階諧波失真之多階換流器之分析與製作
論文名稱(外文):Analysis and Implementation of a Novel Space Vector Modulation Strategy for Multilevel Inverter, Including the Operations in Overmodulation Region and Low-Level Region with Reducing Harmonics
指導教授:陳一通陳一通引用關係
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:電機工程系碩士班
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:2009
畢業學年度:97
語文別:中文
論文頁數:160
中文關鍵詞:多階換流器過調變區空間向量調變
外文關鍵詞:Overmodulation RegionSpace Vector Pulse Width Modulation (SVPWM)Multilevel Inverter
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本論文應用新型空間向量調變技術於多階換流器,並討論當其操作在線性區及過調變區之相關情形。新型空間向量調變技術將多階空間向量調變轉換成數個兩階空間向量調變,大大的簡化複雜度並且有助於判斷參考電壓所座落的區間,且以最鄰近三個向量作為合成基準,降低向量持續時間的計算量,並能最佳化空間向量的切換次序,以減少額外的切換損失。
當多階換流器之調變指數逐漸增加而由線性調變區進入過調變區時,新型空間向量調變技術能以簡單合成方式,且不需要額外的外加電路,而在特定的角度範圍內作修正以降低諧波失真。此外當多階換流器操作在低調變指數時,利用原本無切換動作的開關作適當的切換,可進一步降低諧波失真。
最後利用模擬與實驗結果來驗證這些調變方式。而本論文之實驗電路為建構在三相五階換流器的架構上,而系統的數位化控制則是使用德儀公司所生產的 TMS320LF2407A 之數位訊號處理器完成。
A novel space vector modulation strategy for the multilevel inverter is proposed and it can operate in the linear modulation region and the overmodulation region. The multilevel space vector in the novel space vector modulation strategy will be equivalent to a few two-level space vectors. This strategy can simplify the complexity to determine the location of reference voltage easily and the nearest three vector approach will be used as the synthesis basis. The calculation amount of the vector’s dwelling time can also decrease and the optimized switching sequence can be achieved to reduce the switching losses.
When the modulation index of multilevel inverter gradually increases from the linear modulation region to the overmodulation region, the novel space vector modulation strategy can also be synthesized simply, it does not need an additional circuit by the proposed strategy and it can reduce the harmonic distortion by adequate modification in the specific angle scope. Furthermore, the multilevel inverter operating in the low modulation index can reduce the harmonic distortion by using the devices which are not utilized originally.
Finally, simulations and experimental results will be used to verify the proposed modulation strategy. The experimental circuit is the three-phase five-level inverter and the digital control of the system uses TI Company’s TMS320LF2407A digit signal processor.
中文摘要 -i
英文摘要 -ii
誌謝 -iv
目錄 -v
表目錄 -viii
圖目錄 -ix
第一章 緒論 -1
1.1研究背景與目的-1
1.2文獻回顧- 1
1.3內容大綱- 2
第二章 脈波寬度調變技術控制原理-4
2.1前言-4
2.2正弦脈波寬度調變技術-4
2.3多階空間向量脈寬調變策略-7
2.3.1空間向量脈寬調變策略原理-7
2.3.1.1座標轉換-7
2.3.1.2電壓空間向量-10
2.3.1.3電壓空間向量合成-11
2.3.1.4判斷參考電壓座落區間-13
2.3.1.4.1 座標系統法-13
2.3.1.4.2 旋轉60°座標系統法-14
2.3.1.5 選擇合成向量的切換次序和切換狀態-16
第三章 新型空間向量調變技術於過調變區與減少低階諧波失真之控制原理-19
3.1前言-19
3.2空間向量調變操作在線性調變區及過調變區-19
3.2.1線性調變區之持續時間-21
3.2.2過調變區之持續時間-27
3.3多階換流器於新型空間向量調變技術-33
3.3.1多階換流器電路架構-33
3.3.2兩階平面選擇與向量分解-35
3.3.3多階空間向量調變技術操作於線性調變區-40
3.3.3.1電腦模擬-50
3.3.4多階空間向量調變技術操作於過調變區-53
3.3.4.1電腦模擬-60
3.3.5多階空間向量調變技術操作於過調變區之降低諧波失真之分析-68
3.3.5.1電腦模擬-70
3.4多階換流器之減少低階諧波失真-80
3.4.1減少低階諧波失真之分析-84
3.4.2電腦模擬-88
第四章 系統整合與實驗結果-102
4.1前言-102
4.2系統架構分析-102
4.2.1TMS320LF2407A 特性-102
4.3軟體設計流程-105
4.4實驗波形-107
4.4.1多階換流器於新型空間向量調變技術操作於線性調變區之實驗波形-107
4.4.2多階換流器於新型空間向量調變技術操作於過調變區之實驗波形-110
4.4.3多階換流器於新型空間向量調變技術操作於過調變區之降低諧波失真之
實驗波形-117
4.4.4多階換流器之減少低階諧波失真之實驗波形-124
第五章 結論與未來建議-138
5.1結論-138
5.2未來建議-138
參考文獻 -140
附錄 作者簡介- 142
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