本論文以永磁式無刷電機設計觀念為基礎，設計永磁起動發電機(Permanent Magnet Starter Alternator, PMSA)，並以直驅方式起動轉子引擎(Wankel Engine)，當轉子引擎順利運轉後便帶動PMSA提供負載用電，取代傳統的直流有刷起動馬達與發電機，便可減少空間與重量、降低機械損耗摩擦，達到提升效率之目的。本論文PMSA主要是採用高性能稀土類磁鐵，不僅使功率密度提高，重量減輕，而且維護方便，可靠度及效率皆有所提升，但是應用於大型的PMSA，即會產生組裝困難之問題。因此本論文將結合「後充磁法」(Post-Assembly Magnetization,PAM)，設計出後充磁式永磁無刷起動發電機，來解決大型PMSA之組裝問題。
本論文將依負載需求，規劃出永磁式起動發電機之設計條件與後充磁之限制，並以電機理論與等效磁路設計PMSA雛形及尺寸，並加入繞線與電氣方面的設計，最後透過有限元素分析模擬PMSA磁路特性與性能。另外，在後充磁方面，透過模擬分析並找出轉子相對位置與充磁所需之電流，並提出槽極比為3倍的充磁法。此充磁法不需計算角度，且可應用於各種接線方式，可與充磁機的規格作匹配上的調整，再透過實驗與模擬交叉驗證其正確性。並整理出完整的充磁外部接線方式和充磁轉子相對位置，最後以一次充磁與二次充磁作完整比較與探討。實驗部分，PMSA在馬達模式能夠提供足夠轉矩帶動轉子引擎順利運轉，而在發電機模式時能夠符合轉換條件3000rpm與額定條件6500rpm下的規格。並結合後充磁方式，與前充磁作完整的分析與比較，最後，量測與實驗結果符合理論設計，達成永磁起動發電機結合後充磁法之設計與研發之目的。

In this study, the design concept of the permanent magnet brushless motor is based on the permanent starter alternators (PMSA) and uses direct drive to start Wankel engine. The rotor driven PMSA provides electrical power and is able to reduce the spaces, weights and the mechanical losses of the transitional DC brush motors and generators. The purposed PMSA uses high performance rare-earth magnet to increase the power density, reliability and efficiency and reduce the weights and the difficulty of the assembling. Since the degree of difficulty will increase when the PMSA becomes larger, this study combines the Post-Assembly Magnetization (PAM) to solve the assembling problem.
The design conditions and the restrictions of the PAM are known after the load analysis. The basic shape and size of the PMSA are designed by the electrical theory and the equivalent circuit. After all parameters are set, the magnetic characteristics and the performance are simulated by the finite element analysis. It can also be used in PAM method to find out the relative rotor position and assembling current.
From above, the design proposes a novel PAM approach in pole-slot ratio at 3. The relative position of the rotor and the magnetizing current requirement are satisfied through the simulation. This method needs no angle rotation, and can be used in a variety of connection methods, magnetizing machine can match the specifications for the adjustment, and results are verified through experiment and simulation. Then, a completely list is sorted by the order of PAM external connection mode and relative rotor position.
In the experiments, one time magnetization compare with twice magnetization so that shows the different and further discussion in details. Also, the new design of PMSA drive the Wankel Engine smoothly and is proved under rating operation at 3000rpm and 6500rpm. Finally, the magnetizing method combined with a magnetized for an integrated analysis and comparison, measurement, and experimental results with the theoretical design, design and realization of permanent magnet starter alternators with Post-Assembly Magnetization design and research is achieved.

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