研究生: |
巫昇峰 Sheng-Feng Wu |
---|---|
論文名稱: |
基於曲折繞接線變壓器利用特定諧波消除之
三階層反流器研製 Implementation of a three-level inverter based on zig-zag connected transformer using selective harmonic elimination |
指導教授: |
楊宗銘
Tsung-Ming Yang |
口試委員: |
羅有綱
Yu-Kang Lo 陳良瑞 Liang-Rui Chen 丁振聲 Chen-Sheng Ting |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電機工程系 Department of Electrical Engineering |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 98 |
中文關鍵詞: | 選擇諧波消除 、三階層反流器 、牛頓-瑞福森法 、最小平方差 |
外文關鍵詞: | selective harmonics elimination, three-level inverter, Newton-Raphson method, least squares solutions |
相關次數: | 點閱:738 下載:7 |
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本文主要利用輸出變壓器曲折繞接線(zig-zag transformer)及選擇諧波消除脈波寬度調變(Selective Harmonics Elimination PWM, SHE PWM)來控制三階層反流器系統。因輸出變壓器之特性,其脈波寬度調變波形被設計成四分之ㄧ對稱波形,該波形利用牛頓-瑞福森法(Newton-Raphson method)求開關之切換角度精確解曲線資料,再將曲線資料利用最小平方差法(Least Squares Solutions)來獲得曲線近似方程式。由於曲線近似化的優點能夠讓數位處理器做即時運算來控制基本波大小及改變系統頻率。最後,本文將實驗證明該系統。
This thesis applies the zig-zag transformer and the selective harmonics elimination PWM (SHEPWM) scheme to control a three-level inverter system. The PWM is designed to a quarter symmetry wave due the transformer’s characteristics. The wave applies the Newton-Raphson method to solve the exact curves, and then used the least squares solutions to obtain curve fitting equations. Due to the advantage property of curve fitting, the digital signal processor is able to control the fundamental value and change systematic frequency. Finally, experimental results confirm the system.
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