臺灣博碩士論文加值系統

本論文提出一種利用功率變壓器上之驅動繞組及反向驅動器設計一新型自激式同步整流驅動電路及其對偶電路。同步整流器之驅動信號與功率開關之閘極信號為互補，以防止同步整流器之本體二極體導通，消除反向恢復所引發之問題。此驅動電路適用於對稱橋式及推挽架構，作為低電壓大電流之應用。此外，此驅動繞組經整流、濾波之後亦可提供次級側週邊電路所需之電源。文中並設計一部自激式同步倍流整流對稱半橋電源轉換器，其輸入電壓為36~72V，輸出為1.65V/50A，實驗結果顯示轉換器之最高效率可達86.98%，由此證明此電路之優異特性。

A new self-driven synchronous rectification scheme, which utilizes the inverting circuit and auxiliary winding in power transformer and achieves synchronous driving, is proposed. The driving signal for synchronous rectifiers is complementary to the gate signal of power switches, which prevents the body diode of synchronous rectifiers from conducting. As a result, eliminating the problem caused by the reverse recovery. The driving scheme can be applied to half-bridge, full-bridge, and push-pull converters and is preferred in low voltage high output current applications. In addition, the driving scheme also provides extra power source required for the secondary peripheral circuit. Various driving schemes have been comparatively studied. The design methods for magnetic components and power devices are given. A symmetrical half-bridge converter with self-driven synchronous current doubler rectification with input voltage range 36~72V and 1.65V/50A output is experimentally performed. The maximum efficiency is 86.98 %, which demonstrates the performance of the proposed technique.

摘要﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒I
誌謝﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ Ⅳ
目錄﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ Ⅴ
表目錄﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ IⅩ
圖目錄﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒Ⅹ
符號表﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ ⅩⅣ
第一章 緒論
1. 1 研究背景與動機﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒1
1. 2 系統架構之描述﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒3
1. 3 論文架構簡介﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒3
第二章 低電壓大電流電源轉換器
2. 1 順向式轉換器﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒5
2. 1. 1 順向式主動箝位及同步整流﹒﹒﹒﹒﹒﹒﹒﹒ 6
2. 1. 2 順向式L-C無損耗重置及同步整流﹒﹒﹒﹒﹒﹒7
2. 1. 3 順向式L-C無損耗重置及同步倍流整流架構﹒﹒8
2. 2 半橋式轉換器﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒8
2. 2. 1 變壓器中間抽頭非對稱半橋架構﹒﹒﹒﹒﹒﹒ 9
2. 2. 2 非對稱半橋同步倍流整流電路架構﹒﹒﹒﹒﹒﹒﹒10
2. 2. 3 變壓器中間抽頭對稱半橋架構﹒﹒﹒﹒﹒﹒﹒﹒﹒11
2. 2. 4 對稱半橋同步倍流整流電路架構﹒﹒﹒﹒﹒﹒﹒﹒14
2. 3 具中間抽頭之降壓對稱半橋﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 15
2. 4 降壓對稱半橋同步倍流整流架構﹒﹒﹒﹒﹒﹒﹒﹒ 16
2. 5 相移控制且具CDR之全橋式電源轉換器﹒﹒﹒﹒﹒﹒17
2. 6 推挽式同步倍流整流架構﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 18
2. 6. 1 推挽同步倍流整流架構﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒18
2. 6. 2 順向推挽同步倍流整流架構﹒﹒﹒﹒﹒﹒﹒ 20
2.7討論﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 22
第三章 自激式同步倍流整流對稱半橋轉換器
3. 1 基本動作原理﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 24
3. 2 穩態分析﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 26
3. 3 主要元件之電壓及電流應力分析﹒﹒﹒﹒﹒﹒﹒﹒ 33
第四章 倍流器整流電路
4. 1 倍流器及其應用架構﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 39
4.2 倍流器同步整流驅動電路﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 43
第五章 電路設計考量與製作
5. 1 系統架構﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 49
5. 2 脈波變壓器設計﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 50
5. 3 PWM控制電路﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 53
5. 4 電路元件參數設計﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 54
5. 4. 1 變壓器設計﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒54
5. 4. 2 輸出扼流圈設計﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒56
5. 4. 3 功率切換開關之選取﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒57
5. 4. 4 同步整流開關之選取﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒58
5. 4. 5 輸出電感值﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒58
5. 4. 6 輸出電容值﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒58
5. 5 設計實例﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 59
5. 5. 1變壓器設計﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 59
5. 5. 2 輸出電感量LO﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒61
5. 5. 3 輸出扼流圈設計﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒61
5. 5. 4 功率開關 S1、S2之選用﹒﹒﹒﹒﹒﹒﹒﹒﹒ 63
5. 5. 5 同步整流開關 SR1、SR2之選用﹒﹒﹒﹒﹒﹒ 63
5. 5. 6 輸出電容CO之選用﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒63
第六章 模擬與實驗結果
6. 1 系統模擬﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 65
6. 2 電路模擬結果﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 65
6. 3 實測波形與結果﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 76
6. 3. 1 電路實測波形﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒77
6. 3. 2 電路實測數據﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒83
第七章 結論﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 86
參考文獻﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒88
作者簡介﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒91

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