摘 要

隨著近年來風電技術大幅提昇及市場需求快速增加，風力發電已慢慢從輔助性轉為主力能源之ㄧ，風電能提供潔淨無污染之綠色電能，有能源與環保之雙重貢獻。而風力發電機在國內的研究仍屬少數，本研究著重於風力發電機(Wind Power Generator)的功率密度、效率與低頓轉扭矩之研究。首先對傳統的發電機進行探討，分析其基本磁路設計，再採用Klaus Halbach的磁路設計理論，進行模擬驗證後確認此理論可信度，對此理論結構做尺寸因子與磁石延展角、間隙的電磁分析實驗後，應用霍巴陣列(Halbach Array)的高磁密弦波輸出，設計新型無槽無鐵心式風力發電機，並使用模擬軟體將其進行建模與參數分析，接上負載與三相全橋式整流電路，觀察不同輸出時之工作特性與效率，最後比較此結構設計與傳統風力發電機在整體尺寸、工作特性與成本之差異性。

關鍵詞：風力發電機、霍巴理論、低頓轉扭矩

ABSTRACT
As the technology in wind power generation has advanced and the market has rapidly grown in recent years, wind power has gradually switched from auxiliary to primary utility sources with green energy without pollution which contributes to both environmental and energy consideration. Since researches in wind power generators are still scarce in Taiwan, this thesis focuses on the analysis of power density, efficiency and cogging torque of small wind-power generators. We first review the traditional generator and analyze the magnetic circuits; and, we adopt the Halbach magnetic theory for our new design. We further verify the design via computer simulations on size effects, extended angles, and interleaves of magnet. The design of wind power generator provides sinusoidal magnetic flux density in slotless and coreless structure given by Halbach Array. After preliminary design is done, computer simulations in static and dynamic conditions are conducted with output performances with rated load under either Y or bridge-rectified DC connection. Finally, pros and cons between the proposed design and traditional design are concluded on performances and costs.

Keywords：Wind Power Generation, Halbach Theory, Low Cogging Torque

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