本論文主要針對內藏型永磁馬達之空間向量直接轉矩控制技術進行研究，以修正電壓向量命令之方法，減少馬達輸出之電磁轉矩漣波。本文對電壓與內藏型永磁馬達轉矩之關係進行分析，並探討馬達暫、穩態之電壓與磁交鏈表現，從該結果設計一演算法，給予變頻器更加適合之電壓向量，以減少電壓與磁交鏈之漣波，進而減少轉矩漣波。
文中利用 Simulink電路模擬軟體建立控制架構，並模擬變頻器與微控制器之動作，此外，並利用 Maxwell進行馬達模擬，以求得馬達各項參數，並將其結合至 Simulink觀察馬達模型之表現。之後，將程式碼寫入德州儀器 C2000微控制晶片以實現變頻器開關命令之控制器，再利用硬體迴路 (Hardware in the loop, HIL)模擬驅動電路及馬達動作，驗證控制器及演算法在空間向量直接轉矩控制下降低馬達輸出之電磁轉矩漣波之效能。

This thesis proposes a method for permanent magnet synchronous motors to achieve low torque ripple by applying space vector modulation direct torque control (SVM-DTC). It analyses the relationship between voltage and electromagnetic torque and discusses the behavior of the voltage and flux linkage.
Based on the results obtained through simulations, this thesis develops a new algorithm to reduce the torque ripple by giving a proper command to the voltage source inverter (VSI).
In order to validate the proposed algorithm, Simulink is used to simulate the electric circuit and microcontroller and observe the performance of the motor model. Then, Hardware in the loop (HIL) and Texas Instruments' microcontroller are utilized to validate the simulation results and the performance of the proposed method.

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