本論文提出矩陣轉換器為基礎的內藏式永磁同步電動機驅動系統，探討轉軸角度估測方法、適應性速度控制器配合最大轉矩/安培控制、及提升效率控制。
文中首先利用矩陣轉換器雙向開關元件切換的PWM電壓，所產生的電流變化量，進行轉軸角度的估測，不須額外注入高頻的電壓或電流信號，可以提升整體電壓利用率，並適當地補償虛擬直流鏈電壓脈動產生的漣波，以便提高電動機的轉軸角度估測值的精確度。其次，探討適應性速度控制器配合模糊邏輯搜尋法的最大轉矩/安培控制，達到快速的暫態響應，良好的加載響應，及滿意的追蹤響應。接著，提出提升效率的控制方法，以增加矩陣轉換器的整體驅動系統效率。
本文使用數位信號處理器TMS320LF2407A作為控制核心，實現轉軸角度估測及控制法則。實驗結果與理論分析相當吻合，說明本文所提方法的正確性及可行性。

The dissertation proposes a matrix-converter based sensorless interior permanent magnet synchronous motor (IPMSM) drive system. The research includes rotor position estimation method, adaptive speed controller with maximum torque/ampere control, and increasing efficiency control. First, the current deviation, which is caused by the switching-state of the matrix converter, is used to estimate the rotor position. The proposed method does not need to inject the high frequency voltage or current signal, can increase the voltage utilization of the drive system. By suitably compensating the voltage ripple of the virtual dc-link voltage, the accuracy of the estimated rotor position can be improved. Next, a speed-loop adaptive controller and a fuzzy-logic-search algorithm are used to achieve the maximum torque/ampere control. By using this method, the drive system can achieve fast transient responses, good load responses, and satisfactory tracking responses. After that, an improved efficiency control is proposed to increase the total efficiency of the whole matrix converter drive system.
A digital signal processor, TMS320LF2407A, is used as a control center to implement the rotor position estimation and control algorithms. Experimental results can validate the theoretical analysis to show the correctness and feasibility of the proposed methods.

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