臺灣博碩士論文加值系統

直流對直流轉換為系統之需要提供一正確的電源，被用於不同的控制方案的穩壓器。直流對直流轉換器廣泛的使用在電力電子電路，為其提供有效率並可調整之輸出電壓。本論文中探討三種轉換器：降壓轉換器和升壓轉換器以及升/降壓轉換器。
這些直流對直流轉換器為電子設備提供一針對輸入電壓以及負載電流調整不同的輸出電壓，首先降壓轉換器的輸出電壓將低於輸入電壓，再來，升壓轉換器的輸出電壓將高於輸入電壓，最後，升/降壓轉換器則可提升或降低輸出電壓，本文將使用Multisim軟體驗證這些直流對直流轉換器，每一個轉換器擁有自己的電感峰對峰漣波電壓，電容峰對峰電流，電感，以及開關狀態，並以數學描述上述轉換器。

DC-DC conversion would provide the correct power to the system needed. Many different varieties of voltage regulators with a variety of control schemes are used. DC-DC converters are some of the most widely used power electronics circuits for its conversion efficiency and flexible output voltage. In this thesis 3 common topologies that makes useful are the Buck, Boost, and the Buck Boost converters.
These converters used for electronic devices are designed to regulate the output voltage against the changes of the input voltage and load current. The first converter is a buck converter which steps a voltage down. The producing voltages would be lower than the input voltage. The next converter is a boost converter that steps a voltage up producing a voltage higher than the input voltage. A buck boost converter step a voltage up or down, producing a voltage equal to or higher or lower than the input voltage. The performance has been proved by the Multisim software. The performance simulation mainly focuses on analysis of different DC-DC converters. Each converter has its own peak-to-peak inductor ripple current, peak-to-peak capacitor, inductor, on switch of different converters, all of which are expressed mathematically.

ABSTRACT (CHINESE) I
ABSTRACT (ENGLISH) II
ACKNOWLEDGMENTS III
ABBREVIATION IV
TABLE OF CONTENTS V
LIST OF FIGURES VII

CHAPTER 1. INTRODUCTION 1
1.1 Literature review 2
1.2 Research Purpose 4
1.3 Objective of Study 5
CHAPTER 2. DESIGN OF BUCK-BOOST CONVERTERS 7
2.1 The Buck Converter 8
2.2 Buck converter condition for continuous current and capacitor voltage 14
2.3 The Boost Converters 15
2.4 Circuit Description 15
2.5 Boost converter condition for continuous current and capacitor voltage 19
2.6 The Buck-Boost Converter 19
2.7 Circuit description 20
2.8 Buck-Boost converter condition for continuous current and capacitor voltage 25
CHAPTER 3. MATEMATICAL DESIGN OF EQUIVALENT 26
3.1 Finding the values of the Buck converter 26
3.2 Finding the values of the Boost converter 27
3.3 Finding the values of the Buck-Boost converter 28
CHAPTER 4. PERFORMANCE SIMULATION 31
4.1 Buck converter simulation 31
4.2 Boost converter simulation 34
4.3 Buck-Boost converter simulation 36
4.4 Discussions of simulations 38
CONCLUSION 40
REFERENCES 42

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