本論文提出同步磁阻電動機驅動系統的轉軸角度估測法則及兩種高性能控制器的設計。首先，提出雙電流斜率的轉軸角度估測法則。經由偵測定子電流，利用系統化的角度估測方法，可以準確地估測同步磁阻電動機的轉軸角度。此估測方法只要配合變頻器的切換狀態，適時量取定子電流的斜率，即可估測轉軸的角度，不受電動機參數的影響。此外，本文提出一種新型的狀態估測器，達成電動機的轉速估測，此估測器不易受高頻雜訊影響，且可達到良好的追蹤能力及穩態特性。

其次，本文提出被動式控制及適應性逆控制的設計及實現，以改善同步磁阻電動機的控制性能，達到快速的暫態響應、良好的干擾拒斥性及追蹤能力。此兩種控制方法皆可搭配轉軸角/速度估測法則分別應用在同步磁阻動機控速及定位系統上。

最後，本文使用德州儀器公司所生產的TMS-320F-28335數位訊號處理器，達成所有的轉軸角度及速度估測、電流控制、速度控制及位置控制等計算，故硬體電路甚為簡單。實驗結果說明本文所提方法在控速方面可達到1轉/分至2750轉/分的控速範圍；另一方面，在定位控制方面也能達到相當精準的定位控制功能。

The dissertation proposes a rotor position estimating method and two high-performance controller design methods for synchronous reluctance motor drive systems. First, a dual current-slope estimating method is proposed here. By detecting the three-phase stator currents and using the proposed systematic estimating method, the rotor position of the synchronous reluctance motor can be precisely estimated. The proposed method detects the current-slope of the stator currents, which is synchronized with the switching states of the inverter, to obtain the estimated rotor position. In addition, the method can remove the high frequency noises and achieve good tracking ability and good steady-state characteristic.

Next, the passivity-based control and adaptive inverse control are designed and implemented. The proposed control methods can achieve fast transient responses, good load disturbance rejection responses, and good tracking responses. Both control methods can be applied for the sensorless speed control system and sensorless position control system.

Finally, a TMS-320F-28335 digital signal processor, which was manufactured by Texas Instruments Company, is used to execute the rotor position estimation, rotor speed estimation, current control, speed control, and position control. As a result, the hardware is very simple. Experimental results show that the proposed sensorless drive system can be operated as a precise position control system.

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