本文研究切換式磁阻馬達磁通鏈積分估測法，取代轉軸角度感測元件，使馬達順利運轉於不同的轉速範圍。由於切換式磁阻馬達在轉子換相時通常採用感測元件偵測換相位置，然而在一些特殊環境下(如高溫、易震動)，感測元件偵測方式不僅會降低系統的可靠度，還增加成本與系統複雜度，所以發展出無轉軸感測控制技術。本文所探討的無轉軸感測換相控制技術，首先以有限元素法(FEM)針對切換式磁阻馬達的磁路進行模擬分析，建構馬達的磁化特性曲線，獲取換相位置時，電流與磁通鏈之關係式，再經由數位化的磁通鏈積分運算，來執行馬達換相控制策略，期望以軟體分析的便利與準確性，取代實際量測馬達特性時所需考慮的諸多限制，與量測時程。換相控制系統係採用數位信號處理器DSP為控制核心，配合實體電路的製作，以實驗結果驗證本文採用方法之可行性。

　　This thesis discusses the flux integration method for the estimation of SRM commutating position in order to operate motors smoothly in various speed ranges. Conventionally, switched reluctance motor usually employs position sensors to determine the commutation position. However, under some special conditions, such as high temperature or vibration, employing position sensors will not only reduce the reliability of the drive system, but also increase prime cost and systematic complication. Thus, sensorless control technique is developed. In this thesis, the technique of sensorless method utilizes FEM(Finite Element Method) simulation analysis in order to construct magnetization curve of motor and to obtain the relation of current and flux linkage, and through operation of digitalized flux integration to execute the commutating control strategy; last, using the character of software, convenient and accurate analyses, to replace practical measuring which originally involves considerate limitation and measuring timing. Commutating control system uses DSP (Digital Signal Processor) and the fabrication of experimental circuit to accomplish the estimated control technique. The feasibility of the proposed method mentioned is verified through experimental results.

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