本文旨在探討同步磁阻電動機無轉軸角/速度偵測元件直接轉矩控制驅動系統及相關的適應性速度控制器之設計。文中，首先介紹同步磁阻電動機的構造，特性及數學模式。其次，實現無轉軸角/速度偵測元件直接轉矩控制之同步磁阻電動機驅動系統；文中，應用低通濾波器之組合改善傳統磁通估測的缺點。另ㄧ方面，本文提出二種適應性控制器，針對同步磁阻電動機的運轉環境，適時調整適應律以調整控制器的相關參數，提高系統的速度響應及干擾拒斥能力，並以李阿普諾法則說明該控制法則可使驅動系統達到漸進穩定，此控制法則可成功地應用於速度控制系統。本文中除了以電腦模擬驗證相關理論的可行性外，並實際製作一同步磁阻電動機控速系統，該系統以一個32位元數位訊號處理器TMS320-C30為中心，執行直接轉矩控制及適應性控制法則，藉以達到系統數位化之目的。實驗結果證明本文所提理論的正確性及可行性。

This thesis proposes a sensorless, direct torque control, synchronous reluctance drive system and its adaptive speed controller design. First, the structure, characteristics, and mathematical model of the synchronous reluctance motor are introduced. Then, a sensorless, synchronous reluctance drive system with direct torque control is implemented. In addition, a low-pass filter is used to improve the disadvantage of traditional flux estimator. Moreover, two different adaptive controllers are proposed. The controllers can on-line tune their parameters according to the operating conditions to improve the transient speed response and load disturbance rejection capability. The Lyapunov function is applied to prove that the drive system is asymptotically stable and the proposed controllers can be successfully applied in speed control system. Several computer simulation results are provided. In addition, a TMS320-C30 based drive system is realized to execute the direct torque control and adaptive control algorithms. Experimental results validate the correctness and feasibility of the proposed system.

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