本論文旨在探討開關式磁阻電動機的轉軸角度估測方法及其在跑步機的應用。文中，首先介紹開關式磁阻電動機之結構，原理及數學模式，其次，分別說明具轉軸角度偵測及無轉軸角度偵測驅動方法。其中，無轉軸角度偵測的方法，是利用偵測定子電流的斜率估算自感，進而估測轉軸角度。最後探討以模糊比例積分控制應用在開關式磁阻電動機的速度控制，以改善跑步機驅動系統速度追隨及干擾拒斥的能力。
本論文將開關式磁阻電動機應用在跑步機驅動系統，由無轉軸角度估測方法計算轉軸速度，完成閉迴路控速，電腦模擬及實測結果驗證本文所提出的方法確實可行。

The thesis proposes the rotor estimating technique for a switched reluctance motor with its application in a running machine drive system. In this thesis, first, the structure, principle, and mathematical model of the motor is introduced. Then, the drive systems with and without a rotor position sensor are discussed. The sensorless technique, which does not include any rotor position sensor, is proposed in this thesis by detecting the stator currents of the motor, computing the self inductance from the current slope, and then estimating the rotor position. Finally, a fuzzy PI controller is designed to control the motor speed and improve the tracking ability and load disturbance rejection capability.
This thesis uses the switched reluctance motor applying in a running machine system. Based on the proposed sensorless technique, a closed-loop adjustable speed system can be achieved. The simulated results and experimental results validate that the proposed method is feasible and correct.

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