輕型電動載具的普及有利於城市間短程交通的需求，相較於燃油引擎更能有效降低溫室氣體的排放量。近年來，以輕巧便攜為特色的電動滑板車逐漸受到世人關注；作為代步工具，車體輕量化以及續航力的提升是至關重要的部分。市售電動滑板車多數採用輪轂式永磁無刷馬達作為動力源，其重量功率密度有一定的上限，而永磁游標馬達以結構簡單且具有「齒輪比」的特性，可進一步提升馬達的性能。
本研究針對永磁游標馬達低功率因數的原因「磁極間緊密排列的漏磁現象」進行討論，以一個關鍵係數描述漏磁的影響，透過設計漏磁係數改善功率因數，最後歸納出一個適合的設計方案。在實驗結果中顯示，相較於市售馬達，本研究提出的一般型永磁游標馬達設計在反電動勢常數與轉矩常數分別提升27.72 %和41.39 %。
在一般型永磁游標馬達的設計流程中，端部繞組會因為整體槽數減少而增高，本研究針對此問題進而提出由3D金屬粉末列印製成的導磁端蓋合併矽鋼片的「混合式定子」設計，達到內收部分端部繞組的效益。與市售馬達相比，最終提升24.58 %的重量功率密度。

The popularity of light electric vehicles is conducive to the demand for short-distance transportation between cities, and can effectively reduce greenhouse gas emissions compared to fuel engines. In recent years, electric scooters featuring light weight and portability have gradually attracted the attention of the world; as a means of transportation, the lightweight of the car body and the improvement of endurance are crucial parts. Most commercial electric scooters use permanent magnet brushless in-wheel motors as power sources, and their weight power density has an upper limit. Permanent magnet vernier motors (PMVM) compared to the former ones have simpler structure and “gear ratio” characteristics, which can further improve the performance of the motor.
This research uses a key parameter called “leakage factor” to describe the range of flux leakage between magnetic poles closely arranged which leads to the problem of low power factor. By designing the leakage factor to improve the power factor, and finally conclude a suitable result. The experimental results show that the general PMVM proposed in this paper has increased the back-EMF constant and torque constant by 27.72 % and 41.39 % than the benchmark.
In the general PMVM design flow, the end winding will increase due to the reduction of the overall number of slots. To improve the above phenomenon, this research proposes a “hybrid-stator” combined with 2D steel sheets lamination and 3D printing magnetic end cap (MEC) to achieve the benefit of reducing partial end winding. Lastly, the new hybrid-stator PMVM’s weight power density gets 24.58 % higher than the benchmark.

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