臺灣博碩士論文加值系統

本研究為設計一軸向磁通馬達，藉由其高扭力特性及薄型結構之優點，使其方便架設於現有無輔助動力之車輛上，以作為提供騎乘者的輔助動力來源。
該設計源自線性馬達的架構，以磁極吸斥效應進行車輪驅動。馬達之轉子部分架設於輪幅上；定子部分則是固定於車架上。透過負載分析法及電機理論獲得馬達初始相關規格，再使用有限元素分析軟體Ansoft Maxwell進行馬達電磁分析與磁路模擬，反覆調整規格參數與驗證輸出功率，以取得最佳設計參數。
最後利用動態模擬來驗證該馬達之性能，觀察在斜坡上達平衡等速前進時之車速與馬達輸出轉矩。因馬達結構本身之電感較大，電流響應速度較慢，使得馬達在5度斜坡上提供50%轉矩時之車速為8.5 (km/hr)，比一般期望車速略小。

The thesis considers the analysis and design of an Axial-Flux Permanent Magnet (AFPM) motor and its application to auxiliary power system for bikes. Owing to its thin type structure and high torque characteristic, it is convenient to implement the motor on a conventional bike and is able to provide the auxiliary power for the riders when it is needed..
The main design idea of the auxiliary motor is from the structure of a linear motor. The propelling force applied to the wheel is generated through the attraction and repulsion between the magnets. The rotor consisting of permanent magnets is equipped on the wheel and the stator is fixed on the frame of bike. The design specification of the motor is proposed according to the dynamic analysis for riding on the 5-degree slope and the characteristics of electric motor. The electromagnetic field analysis is carried out by the finite element based software Ansoft Maxwell. According to the numerical results of static and dynamic analysis, the motor parameters can be determined such that the design requirement is achieved.
Dynamic simulations are provided to verify the performance of AFPM motor. Owing to the structure of the motor, the inductance is bigger and the response of current is slower than conventional motor. Therefore, the velocity of the bike when riding on the 5-degree slope is 8.5 (km/hr). It is lower than the usually expected speed.

中文摘要 I
英文摘要 II
誌謝 III
目錄 V
表目錄 VIII
圖目錄 IX
第一章 緒論 1
1.1 研究背景與動機 1
1.2 文獻回顧 3
1.3 本文架構 5
第二章 軸向磁通馬達原理 6
2.1 永磁無刷馬達介紹 6
2.1.1 永磁無刷馬達結構 7
2.1.2 軸向磁通馬達分類 10
2.2 磁路模型 15
2.2.1 磁的基本概念 16
2.2.2 磁場源 19
2.3 軸向磁通馬達模型 24
2.3.1 無槽繞線分析 25
2.3.2 簡化軸向馬達模型 26
2.3.3 感應電壓與轉矩分析 28
第三章 軸向磁通馬達設計 31
3.1 負載分析 33
3.2 基本尺寸設計 37
3.3 磁路設計 42
3.3.1 氣隙磁通密度推導 42
3.3.2 反電動勢推導 45
3.4 繞線設計 47
3.4.1 繞線限制 47
3.4.2 線圈與霍爾元件設置 49
3.5 驅動方式 51
3.5.1 六步方波驅動 52
3.5.2 馬達參數計算 55
3.6 結果與討論 60
第四章 有限元素分析 64
4.1 分析工具介紹 64
4.2 三維靜態分析 65
4.3 三維動態分析 70
第五章 結論與未來展望 86
參考文獻 88
附錄一 FEA動態分析參數 91
附錄二 動態模擬相關參數 92

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