臺灣博碩士論文加值系統

目前超音波壓電共振之熱熔技術於工業上之應用已漸獲得重視，而開發壓電驅動更具有其實務應用參考價值，因此本文即設計換流器輸出高頻電壓，並藉由霍爾元件回授換流器電流，及經由回授電路判別後，利用場規劃邏輯閘晶片設計控制換流器之開關，以使換流器產生適當頻率之電壓，且經由適當頻率與電路設計之選擇，期使換流器開關於不同頻率下，皆可達到零電壓切換，俾以提升系統效能，降低開關溫度，並同時有效驅動壓電共振陶瓷產生機械振盪，以驅使系統穩定運作。本文同時推導換流器系統之輸出電壓與輸入電壓之關係，並經由模擬驗證本文所提之控制系統正確性，且實作雛型電路及紀錄實測波形，以佐證本文所提電路之可行性及實務採行之參考價值。

With an increased concern of ultrasonics piezoelectric transducer systems, the development of inverters to be suitable for such an industrial application system has gained a higher practical value nowadays. In this thesis, the resonant inverter circuit of high frequency that is controlled by field programmable gate array to drive ultrasonics piezoelectric systems has been completed with a high success. Meanwhile, the developed system owns the capability of zero-voltage switching(ZVS), hence exhibiting the merits of low power loss and temperature rise. To validate the effectiveness of the method, this thesis has investigated the voltage relationships between input and output as well as examined the corresponding waveforms. Test measurement help confirm the feasibility and practicality of the method for the application applied.

中文摘要 I

英文摘要 II

誌謝 III
目錄 IV
表目錄 VII

圖目錄 VIII

符號說明 XII

第一章 緒論 1
1-1 研究背景與動機 1
1-2 研究目的及方法 4
1-3 內容大綱 6
第二章 超音波熱熔機控制理論分析 7
2-1 簡介 7
2-2 壓電效應原理與應用 8
2-3 壓電陶瓷製過程 9
2-4 壓電陶瓷諧振頻率推導 10
2-5 壓電陶瓷特性分析 13
2-6 無串聯抗流電感之諧振電路 16
2-7 串聯抗流電感之諧振電路 18
2-8 壓電陶瓷電流與頻率關係 23
2-9 控制理論分析 25
第三章 半橋換流器電路分析 27
3-1 簡介 27
3-2 換流器種類介紹 28
3-2-1 全橋式換流器 28
3-2-2 半橋式換流器 29
3-3 開關切換及柔性損失 31
3-4 半橋換流器數學模型推導 32
3-5 半橋換流器時序分析 35
第四章 系統硬體架構 38
4-1簡介 38
4-2功率晶體驅動電路 40
4-2-1控制訊號產生電路 40
4-2-2光耦合隔離驅動電路 41
4-3 主電力架構 44
4-4 保護電路 45
4-4-1 閘鎖電路 45
4-4-2 過電壓保護電路 47
4-4-3 突波保護電路 49
4-4-4 有效值偵測電路 52
4-5 回授電路 54
4-6 控制電路 56
第五章　模擬結果 61
5-1 簡介 61
5-2 換流器之變動負載測試 63
5-3 超音波系統之換流器模擬 65
5-4 壓電陶瓷端點模擬波形 74
5-5模擬結果討論 77
第六章 實驗結果 78
6-1 簡介 78
6-2 換流器之變動負載測試 80
6-3 換流器之壓電陶瓷負載測試 82
6-4 壓電陶瓷端點量測 88
6-5 硬體電路實體圖 93
第七章 結論與未來研究方向 94
7-1 結論 94
7-2 未來研究方向 95
參考文獻 96
作者簡介 100

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