本論文旨在研製高功因可調電壓無轉軸偵測元件之開關式磁阻電動機驅動系統，並實際應用在洗衣機。文中介紹開關式磁阻電動機的結構、原理及數學模式，說明無轉軸偵測元件系統驅動方法，並探討於電源側加入一功因校正電路，提升電動機運轉輸入側電源的功率因數。最後，再加入一可調降壓電路，藉以調整直流鏈電壓，進一步降低電動機之噪音及振動。本文所提之開關式磁阻電動機轉軸角度估測法，係利用即時運算電動機激磁繞組的磁通鏈，再配合事先建立的電動機磁通鏈對電流及轉軸角度的關係表，以決定激磁相位及估測轉速。
本論文將開關式磁阻電動機應用在洗衣機驅動系統，以數位信號處理器TMS320LF2407A晶片為系統核心發展軟體，執行無轉軸角度估測方法進行換相及估測轉速，完成閉迴路控制，實測結果驗證本文所提出的方法確實可行。

The thesis investigates into the design and implementation of a high power-factor, adjustable voltage, sensorless switched reluctance motor drive system, which is used in a washing machine. First, the structure, principle, and mathematical model of the switched reluctance motor are introduced. Then, a sensorless drive system is illustrated. After that, a power factor correction circuit is used to improve the the power factor of the ac input side. Finally, a buck converter is implemented to adjust the dc voltage and then to reduce the acoustic noise and vibration. The thesis proposes a simple rotor position estimating method. By computing the flux and comparing the table, the rotor position and speed can be obtained.
The proposed switched reluctance motor drive system is applied to a washing machine. A digital signal processor, TMS320LF2407A, is used as a control unit to execute the sensorless operation and achieve closed-loop control system. Experimental results verify the correctness and feasibility of the proposed system.

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