臺灣博碩士論文加值系統

本論文提出可適用於綠能電力系統之三繞組高升/降壓直流/直流雙向轉換器。本轉換器由升壓電路、降壓-升壓電路及高頻變壓器組合而成。相較於傳統雙向式直流/直流轉換器，可有效減少功率開關元件的數量進而降低成本及擁有較簡單的控制方式。此外，本轉換器與傳統雙向式直流/直流轉換器相比，在相同變壓器匝數比與開關週期比的狀況下，可達到較高的電壓增益。為改善雙向轉換器的整體效率，本轉換器主要是利用回收變壓器漏電感之能量，達到提升效率。在論文中將針對所提的轉換器做理論分析、公式推導、動作原理分析。並且透過硬體實測，來證實所提轉換器之可行性。

The aim of this thesis is to present a converter, which can achieve high voltage gain, reduce cost, and promote efficiency. It has the intrinsic features of leakage energy recycling and zero-voltage switching. The presented converter consists of a boost converter, a buck-boost converter, and a high frequency transformer. As compared to traditional bi-directional DC-DC converters, fewer power active components, lower cost, easier control design are its advantages. Under the same conditions of turns ratio and duty ratio, higher voltage gain can be accomplished. To improve conversion efficiency, the energy stored in the leakage inductance of the transformer can be totally recycled.
In the thesis, theoretical analysis, detailed derivation, and operation principle are conducted. The feasibility of the presented converter has been verified through hardware implementation.

中文摘要 i
Abstract ii
誌謝 iii
Contents iv
List of table v
List of figure vi
Chapter 1 Introduction 1
1-1 Research background 1
1-2 Research purposes 3
1-3 Content Outline 4
Chapter 2 A triple-wnding high setp-up /down bi-directional converter 5
2-1 A triple-wnding high setp-up /down bi-directional converter 5
2-2 Operation mode 5
2-2-1 Buck Mode 5
2-2-2 Boost Mode 12
2-3 Steady-state analysis 17
2-3-1 Steady-state analysis of buck mode 18
2-3-2 Steady-state analysis of the boost mode 25
2-4 Power switching component breakdown voltage 30
Chapter 3 Experimental results 33
3-1 Buck Mode 33
3-2 Boost Mode 39
Chapter 4 Conclusions 45
References 46

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