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研究生：	林易賢 Lin, I-Hsien
論文名稱：	應用無刷雙饋式磁阻發電機於波浪能轉換器之研究 Application of Brushless Doubly Fed Reluctance Generator on Wave Energy Converter
指導教授：	謝旻甫 Hsieh, Min-Fu
學位類別：	博士 Doctor
系所名稱：	工學院 - 系統及船舶機電工程學系 Department of Systems and Naval Mechatronic Engineering
論文出版年：	2013
畢業學年度：	102
語文別：	英文
論文頁數：	130
中文關鍵詞：	波浪發電、震盪水柱沉箱、無刷雙饋磁阻發電機、磁路模型
外文關鍵詞：	Wave energy, oscillating water columns, brushless doubly-fed reluctance generator, magnetic circuit model
相關次數：	點閱：123 下載：11
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本文主旨在於提出一無刷雙饋磁阻發電機之磁路模型與設計方法，以應用於波浪發電系統。本文所發展之波浪發電系統具備有震盪水柱沉箱、渦輪葉片與無刷雙饋式磁阻發電機，其目的在於將波浪能轉換為電能。
由於能源危機與溫室效應，再生能源未來將成為能源市場之主流。於各種再生能源中，海洋波浪能具有連續性以及場址多樣性，十分具有開發價值。然波浪發電裝置備受海洋環境考驗，考量其結構強健度，本文使用震盪水柱式系統做為波能轉換裝置。而就有效波浪能與安裝成本來說，近岸海域如港口之防波堤為適合的波浪發電場址。發電機方面，本文選用無刷雙饋式磁阻發電機為發電單元。
本文首先利用小型震盪水柱沉箱討論波浪能轉換系統，藉由分析所選定之波浪能場址，根據尺縮後的額定波浪功率，可計算沉箱轉換後的空氣動能，此空氣動能經葉片轉換為機械動能求得機械功率與轉速，以作為模型發電機的設計規格。本文利用等效電路討論無刷雙饋磁阻發電機之特性，並提出功率估測流程求得發電機輸出功率與操作範圍，以符合波浪發電系統之設計規格；發電機設計結果則使用有限元素模擬軟體進行初步驗證。本文另提出適用於無雙刷雙饋磁阻發電機之磁路模型，此模型可整合等效電路為一完整之電機設計與分析流程，適合作為設計階段的效能評估。本文建置之小型振盪水柱沉箱及無刷雙饋式磁阻發電機原型機，皆分別利用實驗驗證其設計與分析結果。

This thesis primarily proposes a magnetic circuit model (MCM) for brushless doubly-fed reluctance generator (BDFRG) applied to wave energy converter (WEC). The WEC includes: an oscillating water columns (OWC) with chambers, turbines and a generator for wave energy conversion.
Due to energy crisis and global warming, renewable energy is expected to dominate energy market in the future. In comparison with other renewable energy resources, wave energy is superior due to its consistency and variety selection of sites. This provides a great potential for development of wave energy. To confront the harsh sea environments, the OWC benefits from its robustness. Considering wave energy availability and installation cost, near-shore OWC can be constructed with the breakwater at the harbor area. In this thesis, BDFRG is selected as the generator for the OWC.
A prototype OWC chamber is firstly discussed. The scaled down OWC chambers are designed based on the wave conditions of the target installation site. The available rated air power converted from the chamber is calculated. The mechanical power extracted from the turbines is also determined. These will be used to determine the specifications of the model BDFRG. To verify the power generation and design methodology of the WEC, this thesis develops a model BDFRG for equivalent circuit (EC) discussion. The operating range is also investigated through a power estimation process. The generator design results are preliminarily validated with finite element analysis (FEA) simulations. A magnetic circuit model (MCM) for the BDFRG is proposed. This model can integrate the EC into a complete machine estimation process, which is useful to evaluate its performance at the design stage. The proposed MCM is verified through a prototype BDFRG. Experimental studies on the prototype OWC and BDFRG are both conducted to compare with the analytical results.

摘要	II
Abstract	III
誌謝	IV
Contents	V
List of Figures	VIII
List of Tables	XII
Nomenclature	XIII
Chapter 1　Introduction	1
1　Wave energy investigation	2
2　Energy conversion devices classification	3
2.1  OWC Chambers	5
2.2  Turbines	6
2.3  Generator	7
3  Research Motivation	9
4  Thesis Overview	10
Chapter 2　Oscillating Water Column	12
1　Research of wave energy conversions	12
2　OWC chamber introduction	13
3　OWC component discussions	13
4　The proposed OWC chambers	14
4.1　Site selection	15
4.2　Wave condition for OWC chamber design	16
4.3　Chamber parameter definition	19
4.4　Chamber pressure versus air velocity	21
4.5　 CP-TSR power curve	24
4.6　 Generator electric power test	25
4.7　Power match discussion	27
4.8  Chamber redesign	30
5　Summary	32
Chapter 3　BDFRG Principles	33
1　 Brushless Doubly-Fed Machine	33
1.1　Relation of excitation and rotation speed	34
1.2　Equivalent circuit	36
2  Torque calculation of BDFRG	38
2.1　d-q axis equivalent circuit	38
2.2　Torque calculation by equivalent circuits	39
2.3　Case study: model BDFRG	40
2.4　Case study: Results discussion	42
3　Summary	46
Chapter 4　BDFRG operating range	47
1　Operation range of BDFRG	47
2　Synchronized to the grid	48
3　Proposed power estimation process	49
3.1　Rotor of model BDFRG	50
3.2　Induced voltage on grid winding	51
3.3　Setting voltage level on grid winding	52
3.4　Power estimation	53
4  Case discussion	56
4.1  Induced voltage	56
4.2  With Grid voltage connected	56
4.3　Setting rotor initial position	59
4.4  Initial rotor position recheck	60
4.5  Phase difference from control winding recheck	61
4.6  Output power	63
4.7  Operating range of ED rotor	64
5  Scaled-up model BDFRG	66
5.1  Model BDFRG review	66
5.2  Scaled-up model BDFRG results	67
5.3  Operating range of scaled-up BDFRG	70
6  Experimental prototype BDFRG	72
7　Summary	74
Chapter 5　 Magnetic circuit model for BDFRG	75
1　EC for BDFRM	75
2　MCM for BDFRM	76
3　MCM of BDFRG	76
3.1　Experimental prototype BDFRG	76
3.2　Reluctance Components	79
3.3　MMF	81
3.4　Permeance Array	82
3.5　Iteration process	85
4　Case discussion	87
4.1　 Flux from FEA simulation	88
4.2　 MCM Iteration loop	88
4.3　Flux density comparison	89
4.4　 Flux linkage and voltage comparison	90
5　Discussion: Integrated calculation process	92
6　Summary	93
Chapter 6　Experimental study	94
1　OWC Experimental study	94
1.1　 Experimental setup	94
1.2　 Torque and power match	95
1.3　 Summary	97
2　BDFRG experimental study	97
2.1　 Rotor slow rotation test with DC current fed in	98
2.2　Induced voltage test	99
2.3　Induced voltage comparison	102
2.4　Summary	105
Chapter 7  Conclusions and Future Works	106
1  Conclusion	106
2  Future works	107
Reference	109
Chapter 1	109
Chapter 2	110
Chapter 3	112
Chapter 4	113
Chapter 5	113
Appendix A. Winding	115
A.1  Winding diagram	115
Appendix B. Winding excitation and discussion	120
B.1　Stator winding test	120
B.2  Winding Excitation	124
Appendix C.  Operating range of BDFRGs	128
                                    

Chapter 1
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Chapter 2
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Chapter 3
[3.1] X. Wang, P. C. Roberts, and R.A. McMahon, “Optimisation of BDFM stator design using an equivalent circuit model and a search method,” IET PEMD conference, 2006.
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[3.3] A. M. Knight, R. E. Betz, D. Dorrell, “Design Principles for Brushless Doubly Fed Reluctance Machines,” IEEE IECON, Nov 2011.
[3.4] A. M. Knight, R. E. Betz, D. G. Dorrell, “Design and analysis of brushless doubly fed reluctance machines,” IEEE ECCE, Oct. 2011.
[3.5] L. Xu, “Analysis of a doubly-excited brushless reluctance machine by finite element method,” Industry Applications Society Annual Meeting, Conference Record, vol.1, pp. 171-177, 1992.
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Chapter 4
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Chapter 5
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