本論文提出一新型無轉軸偵測元件直接轉矩控制的同步磁阻電動機驅動系統。文中設計一適應性步階回歸控制器，以得良好的暫態響應及加載響應。首先，探討電動機的結構、特性、及數學模式。其次，提出無轉軸偵測元件的直接轉矩控制。經由此一控制方法，可得到電動機的最大轉矩。然後，研究以適應性步階回歸控制器來改善驅動系統的暫態及加載響應。
文中以TMS320F28335數位訊號處理器作為控制核心，用以執行控制及估測法則，故硬體相當簡單。實驗結果說明本文所提驅動系統的正確性及可行性。

This thesis proposes a novel sensorless direct torque control for a　synchronous reluctance drive system. An adaptive backstepping controller is designed to achieve good transient responses and load disturbance responses. First, the configuration, characteristics and mathematical model of the motor are discussed. Then, a sensorless direct torque control is proposed. By using this method, the drive system can achieve its maximum torque. Next, an adaptive backstepping controller is proposed to improve the performance of the drive system, including transient responses and load disturbance rejection responses.
A digital signal processor TMS320F28335, is used as the control unit to execute the control algorithm and estimating algorithm. As a results, the hardware is very simple. Experimental results validate the correctness and feasibility of the proposed drive system.

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