啟動馬達，在眾多的電力或動力系統中均可見到，大至微電網系統的發電機組，小至汽機車的發動裝置，皆可看見它的蹤影，而啟動馬達的好壞對系統的初始運轉有著重要的影響。傳統的啟動馬達通常以電磁鐵的方式產生磁場，但是當磁場繞組通過大電流時，銅損會跟著產生，進而降低運轉效率。本論文旨在探討高輸出功率、高效率的啟動馬達結構設計，研究中先以一市售之啟動馬達作為參考原型機，對參考機行進行建模還原，並將結果與實測之數據進行比較，發現兩者之間雖存在差異，但趨勢相同，因此模擬結果對於輸出變化的掌握具有參考性。

從參考原型機的還原結果，發現定轉子皆有發生磁飽和的現象，因此接下來對馬達之磁路與電路進行調整。調整後，初步得到之模型，在輸出功率和輸出轉矩有較佳的表現，但是啟動之能量效率比參考原型機更低，因此針對該模型進行田口法最佳化。最後所得之模型，能量效率達到39.27%，比參考原型機提升了1.57%，同時最大輸出功率提升至13.24 kW，為參考原型機之156.50%。

經過一系列方法的調整，最後對參考原型機、最佳化前的馬達模型以及最佳化後的馬達模型，三個模型進行成本效益與功率密度的評估。從評估結果發現，最佳化前的馬達模型為三者中最差的選項，經過最佳化後的馬達模型成了最佳解，因此該最佳化分析對於馬達的設計是一可行的方式。

Starter motors are used in many electrical apparatus, such as starter of emergency generator units, engines in automobiles etc., which determining the initial operation of the system seriously. Conventional starter motors usually provided the magnetic field by electromagnet configuration, exciting current and field windings, however higher current in the magnetic field winding, caused a large amount copper loss and temperature rise, which deceasing the operation efficiency. This thesis aims to investigate the better structural design of a high output power and high efficiency starter motor. A commercially available starter motor was used as a reference prototype, and the modeling simulation results were compared with the experimental measured data to ensure the accuracy and reliability of the modeling.

From the restoration results of the prototype, it was found that magnetic saturation existed during the rotor operation and should be improved both in the magnetic circuit and the electric configuration of the motor. The first revise model has better performances in output power and torque, but the starting energy efficiency is lower than the reference prototype, so the model is optimized further by Taguchi method. The final model achieved an energy efficiency of 39.27%, which was 1.57% higher than the reference prototype, while the maximum output power was increased to 13.24 kW, which was very higher than 9.0 kW, and 156.50% of the reference prototype.

The numerical evaluation about the cost-effectiveness and power density for the reference prototype, the pre-optimized motor model and the post-optimized motor model were executed quantitatively. From the evaluation results, it was found that the motor model before optimization was the worst option among the three, and the motor model after optimization showed the best performance, confirmed the valuable and feasibility of the research for starter motor design.

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