本論文提出一個以參考模型適應系統為基礎的無速度感測器之感應馬達直接轉矩控制系統。其中,用以估測馬達轉速的參考模型適應系統係以Luenberger全階觀測器為基礎。為獲得一穩定的適應機構,本文採用李阿普諾夫(Lyapunov)函數進行推導。傳統的直接轉矩控制技術之優點為轉矩響應快速,但其缺點是轉矩及轉速的漣波較大,因此本文採用結合滑動模式控制與電壓空間向量調變的改良式直接轉矩控制來降低該缺點。 為了驗證所提方法的有效性,本文利用MATLAB/Simulink模擬軟體與PC-based馬達即時控制發展系統,來進行電腦模擬與實驗驗證。由模擬與實驗結果顯示,本論文所提方法具有良好的效能。
This paper presents a sensorless direct torque control (DTC) induction motor driving control system based on model reference adaptive system (MRAS). In the MRAS, the estimation scheme of the rotor speed is based on Luenberger full-order observer, and the stabilities of the observer is proved by the Lyapunov’s theorem. Advantages of the conventional direct torque control are its fast torque capabilities, and its drawbacks are that larger ripples in the torque and rotor speed. To alleviate the disadvantages mentioned above, a combination of sliding mode control and voltage space vector modulation are used in the improved DTC method. In order to verify the effectiveness of the proposed method, we use MATLAB/Simulink simulation software and PC-based real time motor control development system to carry out computer simulation and experimental verification. By the simulation and experimental results show that the proposed method in this paper has a good performance.