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研究生:蔡永輝
研究生(外文):Yung-Huei Tsai
論文名稱:利用順滑模態量化控制理論設計D類音頻功率放大器
論文名稱(外文):Sliding-Mode Quantized Control of a Class-D Audio Power Amplifier
指導教授:余祥華
指導教授(外文):Shiang-Hwua Yu
學位類別:碩士
校院名稱:國立中山大學
系所名稱:電機工程學系研究所
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:2008
畢業學年度:96
語文別:中文
論文頁數:82
中文關鍵詞:順滑模態量化控制D類音頻功率放大器量化控制
外文關鍵詞:class D audio power amplifiersliding mode quantized controlquantized control
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本篇論文主要為應用順滑模態量化控制理論去設計及實現3 level D類音頻放大器。控制器的設計包含了類比濾波器及切換邏輯電路,系統透過控制器去切換全橋電路電流流向以推動輸出LC低通濾波及喇叭,並使得放大器能操作在順滑模態之下,讓放大器能擁有好的音質及穩定性。
論文中實現的放大器,當輸入訊號為1kHz的弦波時,實際量測輸出訊號於音頻內的總諧波失真含雜訊(THD+N%)為0.02,相較之下優於目前現有其它的產品和研究。
This thesis focuses on the design and implementation of a three-level Class D audio amplifier by applying recently developed sliding-mode quantized control. The designed controller, which consists of the analog filters and logic circuit, switches an H-bridge Class-D amplifier with a lowpass LC filter and operates it in the sliding mode, in order to achieve desired stability and high fidelity in the audio band. The experimental result shows that the lowest THD+N (total harmonic distortion plus noise) can be as low as 0.02% at 1 kHz. The performance is better than most of the available commercial products.
第一章 緒論 1
1.1 研究背景 1
1.2 研究動機 2
1.3 章節內容 3
第二章 D類放大器 4
2.1 D類放大器基本原理 4
2.2 脈波寬度調變(Pulse Width Modulation) 5
2.3 Sigma-Delta Modulator 6
2.4 功率輸出級的基本架構 8
2.4.1 半橋(Half Bridge)輸出級 9
2.4.2 全橋(Full Bridge)輸出級 11
2.4.3 停滯時間(Dead Time) 14
2.5 輸出濾波器 15
2.6 性能指標 17
第三章 順滑模態量化控制 18
3.1 順滑模態控制理論 18
3.2 順滑模態量化控制 19
3.2.1 順滑面的選取 19
3.2.2 順滑模態量化控制的迫近模態 22
3.2.3 順滑模態的等效控制 24
3.2.4 非理想的切換 25
3.2.5 控制器W1的設計 27
3.2.6 控制器W2的設計 31
第四章 3 Level D類放大器設計與模擬 33
4.1 輸出級濾波器設計 33
4.2 控制器設計 34
4.2.1 控制器W1設計 35
4.2.2 控制器W2設計 38
4.2.3 系統估測及參數計算 39
4.3 系統模擬 42
第五章 電路實現與性能量測 48
5.1 功率輸出級電路 48
5.1.1 切換邏輯電路 48
5.1.2 切換邏輯 49
5.1.3 二階被動LC低通濾波器電路 52
5.2 控制器實現電路 53
5.3 量測結果 57
5.3.1 放大器性能量測 57
5.3.2 切換邏輯電路 62
5.3.3 其它設計方法性能比較 64
第六章 結論 66
參考文獻 69
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