汽柴油車或大樓緊急發電機的啟動，常需借助一組專用的起動馬達來帶動引擎，傳統啟動馬達的磁場是以電磁鐵方式產生的，所以當磁場繞組通過大電流時，會有較大的銅損產生，故電磁鐵激磁式之馬達整體效率相對會較低。本論文旨在探討更有效、高效率的啟動機結構設計，研究中首先以市售的啟動馬達作為參考機型，對參考機型建模與還原，在還原的過程中，發現模擬數據與實測數據有不小的差異，經過分析相關論文與手冊後，發現造成模擬與實測不同的原因為電刷偏移的影響。
接下來將激磁繞組的部分改為高剩磁的永磁材料，少了激磁繞組的部分，可使結構更加的精簡，並且提高電機的功率密度，在轉子結構與參考機型相同的條件下，將定子使用永久磁鐵替代，分析永磁型與參考機型輸出結果的不同，永磁型直流機的輸出功率與參考機型的7.08 kW相比提升2.4 kW。而後針對永磁型直流機使用田口法最佳化與基因演算法最佳化，使永磁式直流機的最大輸出功率能夠上升，最終模擬兩種最佳化的結果都能夠使最大輸出功率提升，田口法最佳化最大輸出功率為9.72 kW，經基因演算法法最佳化後的輸出功率可以達到9.80 kW。
研究中最後設計出兩種機型，分別為永磁同步馬達與切換式磁阻馬達，經過模擬分析後，兩者的最大輸出功率分別為28.20 kW與11.11 kW。在分析完四種機型後，也評估了四種機型的成本效益與功率密度，成本效益以切換式磁阻馬達的509.6 W/USD為最佳；而功率密度的評比上，則以永磁同步馬達的27.1 W/cm3為最好。

The start of a diesel engine or building emergency generator often requires a starter motor to drive the engine. The magnetic field of conventional starter motor is generated by electromagnet, so when the magnetic field winding passes through a high current, there will be a large copper loss, so the overall efficiency of the electromagnet excited motor is relatively low. This thesis aims to investigate the design of a more efficient starter structure. In this study, the commercially available starter motor is used as a reference model, and the modeling and restoration of the reference model are carried out.
The alternative means of magnetic field is to replace the excitation winding with a high remanence permanent magnet material, which reduces the excitation winding part and makes the structure more compact, and increases the power density of the motor. Under the condition that the rotor structure is the same as that of the reference model, the stator is replaced by a permanent magnet. The output power of the permanent magnet type DC machine (PMDC) is increased by 2.4 kW compared to 7.08 kW of the reference model. Then, the maximum output power of the PMDC can be increased by using the Taguchi method optimization and the genetic algorithm optimization for the PMDC. The maximum output power optimized by Taguchi method is 9.72 kW, and the output power optimized by genetic algorithm method can reach 9.80 kW.
In the study, two models were further investigated and designed, a permanent magnet synchronous motor (PMSM) and a switched reluctance motor (SRM), and their maximum output power was 28.20 kW and 11.11 kW respectively from computer simulations. After analyzing the four motor models, the cost effectiveness and power density of the four models were also evaluated. The cost effectiveness of the SRM was the best at 509.6 W/USD, while the power density was the best at 27.1 W/cm3 for the PMSM, may more suitable to be starter for diesel engines.

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