臺灣博碩士論文加值系統

本論文實現變頻三角形電流模式圖騰柱無橋式功率因數修正器。在一個輸入電壓週期內，皆可實現零電壓切換。本文提出一種不需外部零電流偵測電路的三角形電流模式控制。利用平均電流控制法中的平均電流命令、輸入電壓、輸出電壓及電感等參數，計算可達零電壓切換的切換頻率。利用PSIM電路模擬軟體，驗證本文所提出控制方法之可行性，最終實現變頻範圍60 kHz~180 kHz、輸入電壓230 Vrms、輸出電壓400 V、輸出功率800 W，最高效率可達98.02%的圖騰柱無橋式功率因數修正器。
關鍵字：三角形電流模式、零電壓切換、圖騰柱無橋功率因數修正器、平均電流控制法、零電流偵測電路

This thesis presents a triangular current mode totem-pole PFC rectifier with variable frequency. It can achievd ZVS over the full input voltage range. This thesis proposes a triangular current-mode control without an external zero current detection circuit. In this thesis, average current-mode control is used to achived high power factor. The period of the duty cycle is calculated using the average current reference, input voltage, and output voltage. PSIM simulation is utilized to verify the feasibility of the proposed control method. Finally, the 800-W bridgeless TPPFC with the proposed control is implemented with the switch frequency around 60 kHz-180kHz, an input voltage of 230 Vrms, and an output voltage of 400 V. The maximum experimental efficiency is 98.02%.
Keywords: Triangular Current Mode, ZVS, Totem-pole PFC, average current control, zero current detection circuit

摘要 i
Abstract ii
誌謝 iii
目錄 v
圖索引 vii
表索引 ix
第一章 緒論 1
1.1 研究動機與目的 1
1.2 論文內容大綱 4
第二章 圖騰柱無橋式功率因數修正器分析 5
2.1 圖騰柱無橋式功率因數修正器電路架構與動作原理 5
2.2 臨界導通模式動作區間分析 7
2.2.1 第一區間(t0≦t<t1) 8
2.2.2 第二區間(t1≦t<t2) 9
2.2.3 第三區間(t2≦t<t3) 10
2.2.4 第四區間(t3≦t<t4) 12
2.2.5 第五區間(t4≦t<t5) 13
2.3 動作區間狀態軌跡圖(State-Space Trajectory)分析 15
2.4 三角形電流模式動作區間分析 18
2.3.1 第四區間(t3≦t<t4) 20
2.3.2 第五區間(t4≦t<t5) 21
2.5 三角形電流模式設計 22
2.6 三角形電流模式之平均電流控制法 24
2. 7數位系統延遲時間的影響及責任週期前饋控制 27
2.8 圖騰柱無橋式功率因數修正器控制上的問題 28
2.8.1 零交越電流突波問題 28
2.8.2 輸入電壓極性判斷問題 30
第三章 韌體規劃 32
3.1 程式流程規劃 32
3.1.1 系統初始化 32
3.1.2 CPU中斷副程式流程規劃 33
3.1.3 CLA中斷副程式流程規劃 35
3.2 程式執行時間 36
第四章 電路設計與實現 37
4.1 元件設計 37
4.1.1 電感設計 37
4.1.2 匝數及氣隙長度計算 39
4.1.3 輸出電容設計 39
4.1.4 功率開關選用 41
4.2 感測電路設計 41
4.2.1 輸入電壓回授電路設計 42
4.2.2 輸入電壓極性偵測電路 43
4.2.3 電感電流回授設計 43
4.2.4 輸出電壓回授電路設計 45
第五章 電路模擬及實測驗證 46
5.1 電路模擬 46
5.2 實測波形 47
5.3 實測數據 51
第六章 結論與未來展望 53
6.1 結論 53
6.2 未來展望 53
參考文獻 55

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