內藏式永磁同步電機之無差拍直接轉矩控制研究

Abstract

本論文將無差拍控制與基於空間向量調變技術之直接轉矩控制做結合並應用於內藏式永磁同步電機。無差拍直接轉矩控制(Deadbeat-Direct Torque Control, DB-DTC)能夠快速實現轉矩的追蹤和響應，而基於空間向量調變技術能夠改善傳統切換表技術之直接轉矩控制所產生之轉矩和速度漣波，提高了系統的穩定性和性能。由於無差拍控制器容易受參數誤差影響的問題，因此本論文利用結合電流模型與電壓模型之定子磁通及轉矩觀測器進行補償。此外，加入了每安培最大轉矩控制(Maximum Torque Per Ampere, MTPA)對磁通命令作最佳化，可有效減少轉矩漣波，進一步優化內藏式永磁同步電機的控制性能。最後，使用MATLAB/Simulink軟體來建構內藏式永磁同步電機模型與控制策略進行模擬及驗證。

This thesis combines deadbeat control and SVM-based direct torque control and applies them to interior permanent magnet synchronous motors (IPMSM). The Deadbeat-direct torque control (DB-DTC) enables rapid tracking and response of torque, while the implementation of space vector modulation (SVM) techniques significantly reduces the torque and speed ripples generated by conventional direct torque control, thereby enhancing system stability and performance. As the deadbeat controller is vulnerable to parameter inaccuracies, this research uses a hybrid stator flux linkage and torque observer that combines the current model and voltage model for error compensation. Moreover, the inclusion of maximum torque per ampere (MTPA) control optimizes the flux command, effectively reducing torque ripples and further improving the control performance of IPMSM. Finally, the IPMSM model and control strategies are constructed, simulated, and verified using the MATLAB/Simulink software platform.