臺灣博碩士論文加值系統

本論文提出具有隔離雙向交錯式低漣波轉換器，低壓側使用兩顆儲能電感以降低電流漣波，藉由倍壓與箝位電容使變壓器匝數比降低以及實現漏感能量回收進而降低開關應力，且高壓側採用倍壓電路提高電壓增益。此外，所提出轉換器之開關具有零電壓切換功能，能降低開關切換損耗以增加電路轉換效率。而控制部分，利用全數位撰寫回授控制以提升電路的穩定性與功能性。
實驗電路規格為低壓端24 V、高壓端400V且額定功率1kW，並且透過模擬軟體與實作加以驗證本論文提出電力轉換器之有效及可行性，所提出之轉換器在升壓模式下最高效率點為400W時98.2%，滿載效率為94.6%；而降壓模式下最高效率點為500W時96.25%，滿載效率為94.46%。

In this thesis, a high efficiency, isolated bidirectional high conversion gain interleaved converter (IBHIC) is proposed. Two energy storage inductors are used in the low-voltage-side to reduce the current ripple. The both clamp and voltage-doubler capacitors accomplish active clamping, and recycle the energy stored in the leakage inductance, the turns ratio could be also reduced. The voltage-doubler circuit in the high-voltage-side enhance the voltage gain. Furthermore, power switches are operated with zero-voltage-switching and reduced switching losses, also improved efficiency. As for the PWM signal, full digital control is used to achieved the stability and functionality of the circuit. The prototype circuit with the low-side voltage 24 V, the high-side voltage 400 V and the rated power of 1 kW, is implemented to verify the feasibility of proposed topology. The maximum efficiency of the proposed topology in the step-up mode is 98.2% at 400W; and in step-down mode is 96.25% at 500W. In addition, the measured full-load efficiencies are respectively 94.6% and 94.46%.

摘要
Abstract
致謝
Contents
List of Tables
List of Figures
Chapter 1 Introduction
1.1 Background
1.2 Motivation
Chapter 2 Overview of Isolated Interleaved Converter
2.1 Isolated Interleaved Converter Type I
2.2 Isolated Interleaved Converter Type II
Chapter 3 The Proposed Isolated Bidirectional High Conversion Gain Interleaved Converter
3.1 Introduction of the proposed IBHIC
3.2 Operating Principles
3.2.1 Step-up Mode
3.2.2 Step-down Mode
3.3 Steady-state Analysis
3.3.1 Step-up Mode
3.3.1.1 Voltage Conversion Gain
3.3.1.2 Voltage Stresses
3.3.1.3 Current Stresses
3.3.1.4 Effects of the Equivalent Resistances of the Proposed IBHIC
3.3.2 Step-down Mode
3.3.2.1 Voltage Conversion Gain
3.3.2.2 Voltage Stresses
3.3.2.3 Current Stresses
3.3.2.4 Effects of the Equivalent Resistances of the Proposed IBHIC
3.4 Design Considerations
3.4.1 Step-up Mode
3.4.2 Step-down Mode
Chapter 4 Experimental Results
4.1 Step-up Mode
4.2 Step-down Mode
4.3 The Measured Conversion Efficiency of the Proposed IBHIC
4.4 Performance Comparison
Chapter 5 Conclusion and Future Research
5.1 Conclusion
5.2 Future Research
Reference

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