在高度自動化的時代，許多3C產品與設備在組裝時常需要鎖付螺絲，傳統上會透過氣動式螺絲起子或手持電鎖方式以人力作業，但螺絲量多時會耗費較多工時，且容易發生漏鎖的情況，使產品品質不穩定，此時自動化伺服電鎖的投入將成自動化產業的一大助力，能穩定鎖付品質。
　　本論文以應用於伺服電鎖之馬達為設計目標，首先對伺服馬達的轉矩常數衰減率進行討論，並參考市售電鎖規格進行設計，比較有、無槽式馬達輸出特性，討論直驅設計的可行性與探討相同體積下轉矩之限制。本論文主要研究無槽式永磁同步馬達(Slotless Permanent Magnet Synchronous Motor)又可稱空心杯馬達，於不同繞線設計之表現，與探討繞線位置與產生之反電動勢相位關係，也藉此修正繞線因數使轉矩公式更貼近實際情況。使用磁路模擬軟體進行有限元素法分析(Finite Element Analysis)時，為減少模擬所需時間與建模難度，本論文提出一2D等效模擬方式取代3D分析，使無槽式馬達設計與模擬時程大幅縮短。最後提出一新繞線設計與市售及其他空心杯繞線方式進行性能比較，並考量製程的實務面，評估繞線方法於自動化生產的難易度。最終利用實測驗證無槽式雙層併繞馬達之設計。

In the era of high automation, many 3C products and equipment often need to be screwed during assembly. Traditionally, manual operations are carried out through pneumatic screwdrivers or handheld electric locks. However, when the amount of screws is large, more man-hours will be consumed. Moreover, the occurrence of missing locks makes product quality unstable. At this time, the investment of automated servo electric locks will be a big boost to the automation industry, which can stabilize the quality of locks.
This thesis takes the motor applied to the servo lock screw machine motor as the design goal; therefore it compares the performance of slotless permanent magnet synchronous motors in different winding designs and discusses the winding position and the phase relationship of the back EMF and also uses it to modify the winding factor making the torque formula closer to the actual situation.
When using magnetic circuit simulation software for Finite Element Analysis, in order to reduce the time required for simulation and the difficulty of modeling, this thesis proposes a 2D equivalent simulation method to replace 3D analysis, so that the process of design and simulation of slotless motors is greatly shortened.
Finally, a new winding design is proposed and the performance comparison among such new winding design, commercially available methods and other winding methods are presented; in addition, the practical aspects of the manufacturing process are considered to evaluate the difficulty of such winding method applied in automated production. At the end, the design of the slotless motor is verified by actual measurement.

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