當今隨著科技發展，微控制器的效能提升使得永磁同步馬達的驅動控制逐漸被廣泛應用在業界當中，永磁同步馬達其中一項缺陷便是會在運轉的過程中，因為外界條件的改變使其內部馬達電氣參數如電感等發生改變，導致馬達實際參數與最初寫入驅動演算法的數值不同，進而發生控制效能降低的問題。在永磁同步馬達的驅動中，磁交鏈的估測也是非常重要的一環，而對磁交鏈的估測又與電感參數高度相關。
本論文的目標在於設計一能夠抵抗電感參數變異的磁交鏈觀測器，該觀測器將通過電流誤差收斂，計算出因電感變異而產生的磁交鏈誤差值所造成的反電動勢誤差，接著經過積分器將反電動勢誤差轉成磁交鏈誤差項並補回估測的總磁交鏈中，以完成能夠抵抗電感變異的磁交鏈觀測器架構。
本論文使用以總磁交鏈作為輸入參考的直接磁通控制法(Direct Flux Control, DFC)取代傳統磁場導向控制法(Field Oriented Control, FOC)，透過將控制架構轉換至總磁通座標軸(??軸)，能夠對扭矩與磁交鏈進行更為直接的控制，增加對扭矩的控制性，降低穩態扭矩振盪。此外，本論文也引入能夠實時修改參數的次最佳化最大扭矩每安培(Sub-ptimal Maximum Torque Per Ampere)演算法，取代傳統無法更動扭矩曲線的查表法(Look-Up-Table, LUT)最大扭矩每安培(Maximum Torque Per Ampere, MTPA)，增加驅動架構的使用彈性。

The drive control of PMSMs has become widely used in the industry with the advancement of technology and the improvement in microcontroller performance. During the Operation, changes in external conditions can cause variations in internal motor electrical parameters such as inductance. This leads to discrepancies between the actual parameters of the motor and the values initially written into the drive algorithm, resulting in reduced control performance. The goal of this paper is to design a magnetic flux observer that can resist variations in inductance parameters. This observer will calculate the back electromotive force (EMF) error caused by the magnetic flux linkage error due to inductance variations by converging the current error. The back EMF error is then converted into a magnetic flux linkage error term through an integrator and compensated back into the estimated total magnetic flux linkage, thereby completing a magnetic flux observer structure that can resist inductance variations. Additionally, this paper introduces a Sub-Optimal Maximum Torque Per Ampere (MTPA) algorithm capable of real-time parameter modification, replacing the traditional look-up table (LUT) method for MTPA, thereby increasing the flexibility of the drive structure.

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