具三階段能量管理及最大功率追蹤之直接甲醇燃料電池系統

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研究生：	黃宇翔 Yu-Hsiang Huang
論文名稱：	具三階段能量管理及最大功率追蹤之直接甲醇燃料電池系統 Direct Methanol Fuel Cell Systems with Tri-stage Energy Management and Maximum Power Point Tracking
指導教授：	羅有綱 Yu-Kang Lo 邱煌仁 Huang-Jen Chiu
口試委員:	鄭世仁 Shih-Jen Cheng 馬紅波 Hong-Bo Ma
學位類別：	碩士 Master
系所名稱：	電資學院 - 電子工程系 Department of Electronic and Computer Engineering
論文出版年：	2013
畢業學年度：	101
語文別：	英文
論文頁數：	90
中文關鍵詞：	直接甲醇燃料電池、具耦合電感之SEPIC轉換器、三階段能量管理、最大功率追蹤
外文關鍵詞：	DMFC, coupled-inductor SEPIC, Tri-stage management, MPPT
相關次數：	點閱：373 下載：0
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現在大部分可攜式電子產品皆配備可長時間提供電力的鋰電池；直接甲醇燃料電池具有高能量密度及使用可攜式的液態燃料並可當作可對電池充電的替代電源。直接甲醇燃料電池深受甲醇滲透影響，它的燃料效率在低功率時呈現低效率，隨著輸出功率的增加而改善。綜合上述特點及各個模組的未知甲醇滲透率，使得最大效率點的追蹤不易控制，有利的是，電池的最大功率點非常接近最大效率點。本論文利用最大功率追蹤演算法逼近最大功率點。此外根據能量的剩餘或不足，利用三階段能量管理演算法控制能量的供給。本文提出的SEPIC轉換器和整體系統控制演法將被進一步探討，而相關的實驗結果將被一併提出。

Nowadays, most of portable electronic products are equipped with Li-ion battery to provide the sustained energy supply. Besides, direct methanol fuel cells (DMFCs) have several advantages and are widely researched for portable applications. 1. It is portable due to the use of liquid fuel. 2. It has high energy density. Above all, it is easily taken as an alternative for charging batteries. However, DMFC is highly affected by methanol crossover rate. Its efficiency is low at low power and higher as the output power increases. Combined with this characteristic and unknown crossover rate makes the tracking of the maximum efficiency point (MEP) difficult. Fortunately, the maximum power point (MPP) is close to MEP. This thesis utilizes the maximum power point tracking (MPPT) algorithm to approach the MPP and thus approach MEP. Moreover, in attempt to contain the energy supply, the tri-stage energy management’s (TEM’s) algorithm is implemented based on power deficit or surplus. The proposed SEPIC converter and the system algorithms will be discussed, and the experiments results are given too.

Abstract	i
摘要	ii
誌　謝	iii
Contents	iv
List of Figures	vii
List of Tables	x
Chapter 1 Introduction	11
1.	Motivation	11
2.	Thesis Organization	14
Chapter 2 Basic Concepts of Direct Methanol Fuel Cells	15
1. Brief Introduction of Fuel Cell	15
1.1. Category of Fuel Cells	15
1.2. Theory and Features of Fuel Cell	20
1.3. Polarization	24
2. Direct Methanol Fuel Cells’ Characteristics	30
3. Equivalent Model of Direct Methanol Fuel Cells	32
Chapter 3 Maximum Power Point Tracking Techniques	36
1. Introduction	36
2. Incremental Conductance Method	36
3. Three-Point Weight Method	39
4. Perturbation and Observation Method	42
5. Comparison and Conclusion for different Methods	43
Chapter 4 Analysis of Coupled-Inductor SEPIC Converter	45
1. System architecture	45
2. Analysis of Coupled-Inductor SEPIC Converter	46
3. Coupled Inductor and Ripple Steering in SEPIC	52
3.1. Model of Two Coupled Inductors	52
3.2. Ripple Elimination for Input Current	54
Chapter 5 Introduction for Digital Control System	56
1. Digital Signal Processor TMS28035 Briefing	56
2. Peripheral Circuit Design	60
2.1. Driving Circuit Design	60
2.2. Voltage and Current Feedback Circuit Designs	62
3. System Control Algorithm and Tri-stage Energy Management	65
Chapter 6 Component Selections	67
1. Inductor Selection	67
2. Input Capacitor Selection	68
3. SEPIC Flying Capacitor Selection	68
4. Power MOSFET Selection	69
5. Output Diode Selection	70
6. Output Capacitor Selection	70
Chapter 7 Experimental Results	72
1. Converter Specifications	72
2. Experimental Measurements	72
3. Loss Analysis	81
3.1. MOSFET Switching Loss and Conduction Loss	81
3.2. Transformer Loss	82
3.3. Power loss of the flying capacitor	82
3.4. Retifier Diode Loss	83
4. Measurement of the Tri-stage Energy Management (TEM)	85
Chapter 8 Conclusions and Future Works	86
References	87

                                

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全文公開日期 2016/07/05 (校內網路)
全文公開日期本全文未授權公開 (校外網路)
全文公開日期本全文未授權公開 (國家圖書館：臺灣博碩士論文系統)

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