本論文之主要目的是藉由採用柔性切換來實現UPS小型輕量化之產品趨勢
。由於在線式UPS架構複雜，本文以無電氣隔離式及電氣隔離式之功率因
數改善轉換器,直流/直流轉換器與直流/交流換流器之柔性切換為研究主
題。針對無電氣隔離式具功率因數改善之升壓轉換器，本文提出一諧振箱
技術以獲致主開關的零電壓切換且藉由可變延遲責任週期之控制方法以降
低不必要之環流損失。在電氣隔離式之功率因數改善升壓轉換器之柔性切
換研究,則提出一新型架構以達成小型、輕量、高轉換效率及降低成本之
目的。實驗結果證實了所提出之分析、設計與控制方法是可行的。關於柔
性切換式直流/直流轉換器，本論文則提出一新的觀念,只要以H-soft-
switched cell取代原有之PWM開關即可以獲致柔性切換之目的。此H-
soft-switched cell用於無電氣隔離之直流/直流轉換器可達成定頻無損
失切換之優點。其可視為一柔性開關故可採用傳統PWM轉換器一樣之控制
電路。藉由定義VH及等面積觀念，本論文歸納出一歸一方法可對降壓轉換
器、降-升壓轉換器及升壓轉換器來進行穩態分析,同時利用有效責任週期
之觀念可獲致轉換器設計簡化之目的。 論文第六章提出一新型高頻交鏈
在線式UPS,其結合了柔性切技術及充電器整合於直流/直流轉換器之優點,
不但可獲致高效率，低成本、輕量及小型化之目的亦可達成長延時UPS所
需要之大電流充電裝置 ,實驗結果驗證了所提之柔性切技術與控制方法是
可行。

In this dissertation, the goal is to implement the UPS product
trend by using soft-switched technology. Due to the complex
structure of the on-line UPS, the penetration is located in
researching of non-isolated PFC converter, isolated PFC
converter and DC/DC converter and DC/AC inverter. For non-
isolated soft-switched boost converter, the study has found a
resonant tank to achieve the zero-voltage switching of the main
switches and also proposed a control scheme for reducing the
circulating loss. For isolated soft-switched boost converter,
the study was proposed a new soft-switched topology which can
achieved the goals of light weight, small size, high conversion
efficiency and low cost. And, the analysis, design and control
of the proposed isolated soft-switched boost converters were
presented and experimental results weresubmitted for
verification.Regarding to soft-switched DC/DC converters, a new
ideal for implementing soft-switched technologies was proposed,
by replacing the original PWM switch with proposed H-soft-
switch. ThisH-soft-switched cell can obtain soft switching in
single-switch non-isolatedDC/DC converter and provides constant-
frequency loss-less switching. It maybe regarded as a soft-
switch with a similar control circuit to that used in
conventional PWM converters. Based on an equal area concept, a
unified methodfor steady-state analysis is also proposed. The
concept of equivalent dutyis introduced to simplify the design
of the converters. In Chapter 6, a novel high-frequency-link UPS
topology is proposed which using the soft-switchedtechnologies
and integrating the charger in the DC/DC converter, the
experimental results show the proposed UPS has a high-degree of
efficiencyincreasing, cost reducing, size reducing and weight
reducing. It is verysuitable for long backup-time UPS
requirement, as the DC/DC converter cansatisfy the charging
requirement of the long backup batteries.

COVER
Content
摘要
Abstract
List of Figures
List of Table
Acknowledgment
CHAPTER 1 Introduction
1.1 Background
1.1.1 Soft-Switched Techniques in AC/DC and DC/DC Converters
1.1.2 Soft-Switched Techniques in DC/AC Inverter
1.2 Motivation of the Work
1.3 Dissertation Outline
CHAPTER 2 Non-Isolated Soft-Switched Boost Converter
2.1 Introduction
2.2 Operational Principle and Analysis
2.3 Parameter Design
2.4 Implementation of Control Circuit
2.5 Controller Design
2.5.1 Controller Modeling
2.5.2 Controller Design
2.6 Experimental Result
2.7 Conclusion
CHAPTER 3 Isolated Soft-Switched Boost Converter
3.1 Introduction
3.2 Operational Principle and Problem Analysis
3.2.1 Operational Principle
3.2.2 Problem Analysis
3.3 Practical Design Consideration
3.3.1 Stabilized Power
3.3.2 Design Procedure
3.4 Experimental Result
3.5 Summarization
CHAPTER 4 Soft-Switched DC/DC Converter
4.1 Introduction
4.2 Operational Principle and Analysis
4.3 Steady State Analysis
4.4 Design Procedures
4.5 Experimental Result
4.6 Summarization
CHAPTER 5 H-Soft-Switched Cell Inverter with Active Clamper
5.1 Operational Principle and Analysis
5.1.1 In Case of Io>0
5.1.2 In Case of Io>0
5.2 Design Procedure
5.3 Operational Sequence of Combining a RDCL Tank with a 3-level Hysteresis F-link Inverter
5.4 Simulation and Experimental Results
5.5 Discussion
CHAPTER 6 A Novel Soft-Switched UPS with High-Frequency Tri-port DC/DC Converter
6.1 Introduction
6.2 Operation Concept and Analysis
6.2.1 Operation Concept
6.2.2 Operation Analysis
6.3 Charging Concept and Control Strategy
6.3.1 Charging Concept
6.3.2 Control Strategy
6.4 Experimental Result
6.5 Summarization
CHAPTER 7 Conclusion
Reference
Biography