本研究針對永磁同步馬達之直接轉矩控制(Direct torque control, DTC)驅動架構提出磁交鏈觀測器設計，利用現有的磁交鏈觀測器架構做參數靈敏度分析，探討參數變化對觀測器的影響，並改善現有觀測器的缺失，提出一新型之磁交鏈觀測器架構。所提之磁交鏈觀測器設計，主要分成兩部分：為了實現無感測驅動，應用主動式磁交鏈(Active Flux)的概念，用來獲得轉子位置資訊；接下來，觀測器會需使用到馬達的數學模型，其參數之準確性相當重要，本研究提出線上參數估測方法，可及時對參數做出修正。實驗部分，以硬體在環(Hardware-in-the-Loop, HIL)方式結合及時控制處理器，驗證磁交鏈觀測器設計之可行性，最後達到永磁同步馬達之無感測直接轉矩控制實現。

Designated to the direct torque control (DTC) of permanent magnet synchronous motors, this thesis proposed a flux observer design. For the purpose of constructing a better flux observer structure, the influence of the inductance and resistance variation on the observer performance was analyzed, and thus the sensitivity of the existing flux observers were investigated and improved. Further, a new flux observer design is proposed, which were featured with two focus design concepts. First, the conduction of active flux is employed to successfully obtain position information of rotors, which enables the realization of senseless drive. Second, the on-line parameter estimation was designed to on-line tuning the parameters to ensure the accuracy and correctness of the parameters; and then it can be secured that motor models provided to the observer is correct. In addition, an experiment platform combining the hardware-in-the-loop and the processor was established for the verification of the feasibility of the proposed flux observer, and the realization of the sensorless direct torque control of permanent magnet synchronous motor drive is fulfilled in this thesis.

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