隨著衛星任務對小型化、高效率及長壽命的需求日益提高，本文開發一種適用於衛星姿態控制系統之反應輪馬達，並提出創新設計的徑向折疊式印刷電路板(FPCB)繞組技術。相較於傳統以銅線繞製並灌膠固定的無槽式定子繞組，本文所提出的FPCB繞組具備製程一致性高、整合性強與可模組化等優勢，能有效提升系統可靠性與製造效率。為克服PCB繞組於徑向磁通應用的空間侷限與導體截面積不足等挑戰，本文採用多層佈線與折疊結構，搭配其邊緣鍍金接點(金手指)與底部PCB板進行電氣連接，實現FPCB繞組三維化，並將結線與部分元件整合以強化其結構一體性與降低阻抗。此外，為突破反電動勢限制所導致的轉速瓶頸，本文提出「部分繞組分離法」，透過開關元件斷開部分繞組以降低高轉速區的反電動勢，擴大角動量操作範圍並維持低功耗特性。本文亦建立完整功耗模型，針對穩態懸停與姿態修正兩種操作模式進行損耗分析，並以模擬與實測驗證設計成效。實驗結果顯示，本文所設計之FPCB反應輪原型機在體積受限條件下成功實現高慣量輸出與低能耗運作，為小型衛星反應輪的可量產化與高可靠性應用提供了新的解決方案。

With increasing demands for miniaturization, high efficiency, and long lifespan in satellite missions, this study presents a reaction wheel motor specifically designed for satellite attitude control, incorporating an innovative radial-folded flexible printed circuit board (FPCB) winding. Compared to traditional slotless windings made with potted copper wire, the proposed design offers greater process consistency, integration, and modularity, thereby enhancing system reliability and manufacturability. To overcome the spatial constraints and limited conductor cross-section of PCB windings in radial flux applications, this work adopts a multilayer interconnect and folding structure. Electrical connections are achieved using gold fingers and a base PCB, enabling a three-dimensional FPCB winding layout. Additionally, connection terminals and components are structurally integrated to reduce impedance and improve mechanical robustness. Furthermore, to address the back electromotive force (Back EMF) limitation that restricts rotational speed, this study introduces a novel "Partial Winding Separation Method." By selectively disconnecting portions of the winding via switching elements, the BEMF in high-speed regions is effectively reduced, allowing an extended operational angular momentum range while maintaining low power consumption. A complete power loss model is developed for steady-state and attitude adjustment modes. Simulation and experimental results confirm that the proposed FPCB reaction wheel achieves high inertia and low energy consumption within a compact form factor, providing a viable solution for reliable, scalable small satellite applications.

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[B1] ISO281:2007, Rolling Bearings – Dynamic Load Ratings and Rating Life.
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