本論文的研究目的是以低價的32位元馬達控制單晶片為核心，開發一無轉軸位置感測之切換式磁阻馬達驅動系統。首先，針對切換式磁阻馬達的原理、結構及數學模型進行介紹，接著再介紹磁阻馬達與驅動系統的設計，然後針對兩種無轉軸感測元件下的系統驅動之方法進行討論，最後再以模擬及實驗驗證。本論文所使用的方法一為磁通鏈角度估測法，藉由量測激磁相的電壓及電流，進而估算激磁相磁通鏈，並用查表法估測角度，來完成在無轉軸偵測元件下之切換式磁阻馬達速度閉迴路控制；而方法二則是採用電流斜率角度估測法，首先量測激磁相的電流，接著算出電流斜率且配合功率轉換器的操作模式得出自感值，利用查表法來進行角度估測，完成在無轉軸感測元件下切換式磁阻馬達速度閉迴路控制。本論文最後利用世紀民生科技所生產的單晶片CS6257實現該驅動系統，並能在測試平台上初步的實測及驗證其功能。 ;Abstract The objective of thesis is to develop a sensorless switched reluctance motor (SRM) drive system with a low cost microcontroller. First, the principle, structure and mathematical model of the switched reluctance motor are introduced. Next, the designs of switched reluctance motor and drive system are discussed. Moreover, two sensorless methods of drive system are derived. At last, it is attested by simulation and experiment. The first method calculates the value of flux-linkage from the measurement of voltage and current. Consequently, the estimated rotor angle can be obtained by using a look-up table. Then, the closed-loop speed control of the switched reluctance motor can be accomplished. The other method estimates the self-inductance of windings by detecting the time derivative of the stator current with the assistance operating states of converter, and the estimated rotor angle can also be obtained by using a look-up table. The speed control can be achieved the same as the first method. In addition, a microcontroller CS6257, manufactured by Myson Century, Inc. is adopted to develop the proposed switched reluctance motor drive system. Finally, some experimental results are given to verify the feasibility of the proposed sensorless control system.