本文旨在提出一套高性能風力發電機的設計準則，包含高效率、高感應電動勢、低電壓諧波失真、低轉矩漣波及低頓轉轉矩為目標，利用田口法及磁石修弧技術作定子與轉子之最佳化，並用同一電機結構由外部接線來改變雙三相及六相繞組，在低風速時二組三相繞組可串聯以提高輸出電壓；而在高風速時則可採並聯方式，其優點為當其中一組故障時，則另外一組可繼續發電供負載使用。藉由有限元素磁路分析套裝軟體進行磁路與電氣特性分析，從空載及加載的實驗結果探討發電機的特性，並分別以額定容量10 kW及300 W風力發電機來作應用說明並完成實作，成功驗證所提理論及設計方法，其中300 W風機與日本大廠作比較，無論是尺寸大小及材料的用量都較少，在相同轉速下的輸出功率更提高了近40%，效率也達近90%。
本研究利用去除傳統靴部結構來簡化製作定子的製程，也就是採完全開口槽作設計，繞線方式則利用絕緣片先在電機結構外繞製完成
，即可套入定子齒部，此一改良可大幅度提高製程效率並節省成本。另可加裝導磁性較佳的墊片(如傳統矽鋼片或鐵質材料)，此墊片可採ㄇ型或鞋型結構，卡入定子齒部，達到類似傳統具有靴部結構之定子。
傳統模擬頓轉轉矩的方式常用全模型或是分割成對稱性結構來處理，但在大型電機或槽數與極數較多的情況下，會受限於有限元素軟體網格數目而無法分析。本文提出了一個新式快速頓轉轉矩分析方法-半磁極對法，配合有限元素套裝軟體及Matlab中的Simulink疊加方式來達到可快速求解與評估頓轉轉矩大小。並利用「力與力臂之槓桿原理」設計出一個簡易且精確的頓轉轉矩量測方式，使用日常生活容易取得的資源來設計量測工具與技術，分別進行16次的量測後再求平均值，與半磁極對之快速法結果相比，差異小於7%，驗證本研究提出之頓轉轉矩快速法的準確性與實用性。

This dissertation is devoted to the analysis and design of high performance permanent-magnet synchronous wind generators. The Taguchi and magnet-shaping methods are used to raise electromotive force, and to reduce voltage total harmonic distortion, respectively. The proposed six-phase and double three-phase windings structures, which consists of six windings in stator, could divide the current of the motor driver evenly and improve the machine safety. Besides, windings are connected in series to increase the output voltage at low speed and in parallel during high speed to generate electricity when either one winding fails. The magnetic and electrical characteristics, such as the magnetic field distribution, equivalent rotor magnetic flux distribution, cogging torque and induced voltage etc., are analyzed by finite element electromagnetic-field analysis software package, Maxwell_2D. Two prototypes generators, 10 kW and 300 W, respectively, are designed in accordance with the proposed method, and verified the performances under load test. The results show a 40% increase in output power with an efficiency of 90% as compared to HR-250, the bigger sized 300 W Japanese generator, which yields 75% efficiency under the same rotating speed.
A new topology is proposed using fully open slots for the stator to reduce the manufacturing complexity by eliminating the traditional boot structure. The ㄇ-shape and shoe types of the stator preferably composed of silicon steel slice and ferrous material allow the spacers wedging into the teeth to improve the manufacturing efficiency, and to reduce the cost.
In order to study the existence and effects of cogging torque, a novel and rapid analysis technique, half magnet pole pair (HMPP), is proposed for forecasting and effectively evaluating cogging torque. Applying the technique with the finite element method and software Matlab, one could evaluate the cogging torque efficiently, meanwhile reduce numerous computing jobs and simulation time. An example of a rotor-skewed structure used to reduce cogging torque of permanent-magnet synchronous machines is evaluated and compared with conventional analysis method for the same motor to verify the effectiveness of the proposed approach. The difference between results from the HMPP and real measurement lies within 7%, proving valuable and suitable usage of the novel method, especially for large-capacity or multiple-pole, multiple-slot machine design.

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