本文旨在完成直接轉矩控制之磁通命令設定策略。首先介紹永磁同步馬達的直接轉矩控制策略，將永磁同步馬達(PMSM)之三相數學模型以座標軸轉換，並利用轉矩與磁通控制法對永磁同步馬達完成速度、轉矩與磁通量閉迴路控制。為了使馬達在變動負載及轉速命令下都能有最大轉矩電流比，本研究利用MATLAB軟體進行系統模擬，在分析出馬達運轉時轉速、轉矩、電流與磁通量互相的關係後，本研究採用擾動觀察法來調整磁通量，並以查表法輔助，達到提升系統響應、強健性及效率之目的。最後使用數位訊號控制器(dsPIC)與硬體在線迴路系統(HIL)實驗，並與模擬相互驗證及比較證明本論文所提出方法的效果及可行性。

This thesis proposes a command setting strategy of magnetic flux for the Direct Torque Control (DTC) on the permanent-magnet synchronous motor (PMSM). The content starts with the introduction of DTC methodology by αβ-axis transformation, closed-loop controls of speed and torque, and tuning of magnetic flux. In order to achieve maximum torque per ampere (MTPA) control, MATLAB simulation is used to analyze the relationships between speed, torque, current and magnetic flux when the motor is running at different operating conditions. The analytical result yields a proper way of flux tuning for the PMSM. Following that, a Perturb-and-Observe algorithm assisted by Lookup-Table method is proposed to regulate magnetic flux for enhancing the MTPA. Finally, the experiment is carried out using Digital Signal Controller (dsPIC) and Hardware in the loop (HIL). Experimental results are compared with the simulation ones to validate the effectiveness and feasibility of the proposed method.

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