本文探討內藏式永磁同步電動機的轉軸角度估測方式及最佳轉速控制器的設計。轉軸角度估測方式使用高頻訊號注入法，利用內藏式電動機的凸極效應進行角度估測。首先，透過驅動系統的電流解析度及配合實驗結果，決定高頻訊號的電壓振幅及頻率。接著，將高頻電壓訊號注入於估測座標d ̂-軸上，並藉由回授d ̂-q ̂軸高頻電流計算出估測與實際角度的誤差。最後，透過遞回修正的方式估測轉軸角度。轉速迴路控制器使用最佳控制，依據系統的動態方程式配合性能指標，計算出最佳控制器參數。
本文使用數位訊號處理器TMS320F2808作為控制核心，實現轉軸角度估測及最佳轉速控制，實驗結果說明本文所提方法的可行性及正確性。

This thesis investigates the rotor position estimation and optimal speed controller for an interior permanent magnet synchronous motor. By using a high-frequency injection method, the rotor position and speed can be estimated based on the saliency of the interior permanent magnet synchronous motor. First, the frequency and amplitude are selected according to the current resolution and the testing results. Next, the high-frequency voltage is injected into the estimated d ̂-axis. Then, the rotor position estimated error is computed via the d ̂-q ̂ axis feedback currents. Finally, an iterative method is used to compute the estimated rotor position. The speed-loop controller is an optimal controller, which is designed based on the motor dynamic equation and performance index.
A digital signal processor TMS320F2808, is used as a control kernel to execute the rotor position estimation and the control algorithm. Experimental results show the feasibility and correctness of the proposed methods.

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