傳統跑步機之動力驅動架構為馬達經由皮帶輪減速再驅動跑步機，其體積龐大且噪音大，有鑑於此，本研究配合直流無刷馬達之設計，提出一新型直接驅動跑步機架構，可避免皮帶輪產生的機械損失、噪音並可節省空間。在馬達之設計上並引入模組化架構之觀念，將新型直流無刷馬達分為數個模組，不僅可以增加整合馬達性能規格的彈性，也同時具有優越的擴充性。
本文依跑步機之負載需求，規劃出新型馬達之額定條件，並以電機理論及等效磁路設計馬達雛形尺寸，最後利用電磁分析軟體分析馬達磁路特性及性能。其中亦討論磁路飽和對於馬達性能之影響，並針對飽和發生原因提出改善磁路飽和之對策。

Pulleys are often used in the transmission of traditional treadmills to reduce the speed from the DC motor and to transmit the power to the treadmills. Such treadmills have large size and noise problems. A new motor design for the treadmills is hence proposed in this thesis where the concept of module design is applied for ease of implementations. The new driving system that directly drives the treadmill using a high torque brushless DC motor, is without the pulley so that it can have achieve the design of smaller volume, quiet operation and high efficiency.
For a directly driving treadmill, the draft of a new high torque brushless DC motor is first developed based on the given rated power and performance. Commercially available finite element analysis software is then employed to do magnetic and electrical circuit design and analysis. The influence of magnetic saturation on the brushless DC motor is also discussed, and several solutions have been proposed to solve these saturation problems.

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