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姓名	陳皇志(Hwang-Zhi Chen )  查詢紙本館藏	畢業系所	電機工程研究所
論文名稱	感應馬達之新型直接轉矩控制研究
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摘要(中)	本論文旨在研究感應馬達在傳統直接轉矩控制上，於中轉速下，控制性能的探討，及低轉速下，運用磁通補償法與回授濾波器法，分別改善在低轉速之電磁轉矩不足，及降低磁通估算誤差。 定子磁通補償的應用，主要是因馬達於低轉速時，轉子磁通變化緩慢，若定子磁通仍操作於定磁通情況下，將使定子磁通無法達到有效控制，進而使馬達輸出之電磁轉矩降低。故當馬達於低轉速運轉時，提出定子磁通量之補償策略，使得馬達在低速時能有效改善輸出電磁轉矩降低的問題。 另外，對於定子電阻因溫升效應而改變問題，本論文針對直接轉矩控制，提出對傳統直接轉矩之磁通計算的改善方法。由於定子電阻會造成反電勢的降低，使得有效輸出轉矩降低，故提出磁通補償的必要性；而馬達參數的變動，使得定子電流產生高頻雜訊，進而導致定子磁通向量於空間位置之估測產生誤差，而選擇錯誤的電壓控制向量，產生轉矩漣波，故傳統的磁通計算中，利用設計低通濾波器於回授路徑上作為補償，可有效消除馬達於低轉速運轉時，因參數變動所造成磁通計算的高頻誤差。
關鍵字(中)	★ 感應馬達 ★  濾波器回授 ★  直接轉矩控制 ★  磁通補償	關鍵字(英)
論文目次	目錄 摘要Ⅰ 目錄Ⅱ 圖表目錄Ⅳ 符號列表Ⅶ 第一章 緒論 1.1 研究動機與目的1 1.2 內容大綱3 第二章 感應馬達之動態數學模型 2.1 感應馬達之動態數學模型5 2.2 感應馬達之動態特性分析12 2.2.1 運轉特性分析12 2.2.2 電磁轉矩與磁通命令的選擇16 第三章 直接轉矩速度控制驅動器設計 3.1 前言18 3.2 數位訊號處理器單元21 3.3 速度回授單元24 3.4 光耦合隔離電路與半橋驅動電路單元26 3.5 切換開關與緩衝電路單元29 3.6 電流、電壓感測電路單元31 3.7 軟體流程圖35 第四章 直接轉矩之速度控制 4.1 直接轉矩控制法36 4.2 感應馬達之直接轉矩速度控制37 4.3 磁通與轉矩控制40 4.4 切換向量表之選擇策略43 4.5 直接轉矩之模擬與實驗結果46 4.6 結論65 第五章 新型直接轉矩磁通補償器 5.1 前言66 5.2 低轉速磁通補償調整68 5.3 磁通估測誤差補償與偏移(Offset)修正73 5.4 模擬與實驗結果76 5.5 結論95 第六章 結論與建議96 附錄AA-1 參考文獻R-1
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指導教授	徐國鎧(Kuo-Kai Shyu)	審核日期	2001-7-8
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