冷卻風扇現今仍廣泛地用於桌上型和攜帶型電腦系統裡，安靜與低功率消耗為設計一個好風扇的趨勢。本篇論文提出了根據環境溫度去調整風扇的轉速，是具有高效率低噪音的雙迴路回授控制方法。控制器主要由三個部份組成，第一個部份是隨溫度變化成等比例的脈波訊號頻率，第二部份鎖相迴路會去使輸入脈波訊號和風扇馬達霍爾IC產生的脈波訊號同步，第三個部份為利用鎖相迴路比較出來的誤差訊號由內迴路產生量化控制力去切換風扇的線圈電流。雙迴路回授控制設計可達到精確的轉速控制，並使風扇具有高效率、低噪音的特性。
實驗結果發現在轉速306.6~1953 R.P.M控制範圍內，平均追蹤穩態誤差為0.4188%，且可控制轉速的溫度範圍在10~70°C。

Cooling fans, widely used in desktop and laptop computers, have been designed toward the tendency of low noise and low consumption power. This thesis purposes a efficient low-noise double-loop control method to regulate the fan speed according to environmental temperature. The proposed controller consists of three parts. The first part is a command generator which generates a train of pulses with its frequency varying proportionally with temperature. The second part is a phase locked loop which intends to synchronize the command pulses with the pulses fed back from the Hall IC of the motor. The third part is an inner loop quantized control that switches the fan according to the error signal sent by the phase locked loop. This double-loop design of feedback achieves accurate fan speed regulation with the nice properties of low noise and high efficiency.
The experimental results show an average regulation error of 0.4188% in the fan speed range of 306.6~1953 R.P.M which corresponds to the temperature range 10~70 Celsius.

第1章 緒論 1
1.1 研究動機 1
1.2 論文概念敍述 1
1.3 論文章節內容 3
第2章 建構溫度控制風扇轉速系統 4
2.1 溫度感測電路 4
2.1.1 MF58型熱敏電阻 4
2.1.2 熱敏電阻轉換頻率電路設計 6
2.2 無刷直流馬達 11
2.2.1 無刷直流馬達架構 11
2.2.2 無刷直流馬達動作原理 13
2.3 鎖相迴路 14
2.3.1 鎖相迴路動作原理與架構 15
2.3.2 鎖相迴路迴路分析 24
2.3.3 鎖相迴路設計 26
第3章 風扇轉速控制設計 30
3.1 建立受控場 30
3.1.1 風扇轉速與時間關係 33
3.1.2 利用系統鑑別建立受控場 35
3.2 設計鎖相雙迴路控制系統 39
3.2.1 量化控制 40
3.2.2 順滑模態量化控制理論 41
3.3 控制器的設計選擇 44
3.3.1 控制器W1的設計 45
3.3.2 控制器W2的設計 46
3.4 風扇鎖頻分析 48
3.4.1 風扇靜止 50
3.4.2 風扇轉動 51
3.4.3 風扇鎖頻 54
第4章 模擬結果與電路實現驗證 56
4.1 溫度控制風扇轉速模擬 56
4.1.1 輸入輸出相位頻率模擬 56
4.1.2 系統穩定特性模擬 57
4.1.3 鎖相單迴路模擬結果 59
4.2 溫度控制風扇轉速電路實現 63
4.3 量測結果 65
第5章 結論 71
參考文獻 74

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