永磁游標電機（Permanent Magnet Vernier Motor, PMVM）因其高轉矩密度與低速直驅的特性，成為電動載具與風力發電等應用中的潛力選項。然而，相較於傳統永磁同步馬達，PMVM 因高極對數結構導致其電感較高、電抗顯著，進而造成功率因數偏低的問題。低功率因數將使變頻器需承受更高視在功率，增加系統成本與損耗，影響整體效率。本研究使用一套整合磁場導向控制(Field Orient Control, FOC)與單位功率因數控制（Unity Power Factor Control, UPFC）之控制策略，針對 PMVM 建立數學模型並推導功因控制下之電流命令軌跡。透過模擬與實驗，比較 UPFC 與傳統最大轉矩每安培（Maximum Torque per Ampere, MTPA）控制策略在不同負載條件下的性能差異。模擬結果顯示，UPFC 可將功率因數維持於接近 1，有效降低虛功率與視在功率，提升能量使用效率。實作部分以 TI F28379D 控制板為核心，搭配實體 PMVM 驅動平台驗證所提控制架構之可行性，實驗結果顯示 UPFC 能在不同負載下維持電壓與電流相位一致，功率因數顯著優於 MTPA。本研究結果證實 UPFC 能有效改善 PMVM 的低功率因數問題，並具有實作可行性，適用於對能源效率要求高的游標電機應用。

Permanent magnet vernier motors (PMVMs) are promising candidates for applications such as electric vehicles and wind power generation due to their high torque density and low-speed direct-drive capability. However, the high pole-pair structure of PMVMs leads to large inductance and reactance, resulting in a relatively low power factor compared with conventional Permanent Magnet Synchronous Motors. A low power factor increases inverter apparent power, system cost, and losses. In this thesis, an integrated control strategy combining Field-oriented control (FOC) and unity power factor control (UPFC) is presented. A mathematical model of the PMVM is established, and the current reference trajectory under unity power factor operation is derived. Simulation and experimental results are provided to compare UPFC with the conventional maximum torque per ampere (MTPA) control under different load conditions. Experimental validation is carried out using a TI F28379D control board and a PMVM drive platform. The results show that UPFC maintains voltage and current in phase under various loads, achieving a significantly higher power factor than MTPA and demonstrating practical feasibility for high-efficiency PMVM applications.

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