本文旨在探討一體式啟動發電機於啟動模式下，利用轉子位置估測法取代高精度轉子位置感測器精度提升方法。系統應能在全速域內進行轉子位置估測，並在短時間內完成初始位置偵測，且在反轉時能維持運作。
轉子位置估測法主要基於馬達模型中的電壓和電流計算，但受到變頻器非線性效應的影響，導致電壓誤差並降低估測精度。此外，低速區域和高速區域之間的估測法切換若控制不當，會導致較大的估測誤差。過大的角度誤差將引起三相電流不平衡和過大電流諧波，降低馬達有載時的性能，嚴重時甚至可能導致系統驟停或損壞。
為降低變頻器非線性效應對估測法造成的轉子位置誤差，本文透過伏秒定理計算誤差電壓後，對轉子位置估測法進行補償。同時，利用高頻方波注入法調變方波電壓幅值，降低低速無載和有載條件下的轉子位置誤差。此外，以調製係數作為轉速過渡區間估測法切換的依據，減少過渡區間估測誤差造成的電流突波，實現全速域轉子位置估測目標。
實驗結果驗證所提出方法的有效性及全速域無感測器控制法的可行性，並於不同運行條件下穩定且精確轉子位置估測能力。

This thesis aims to explore the feasibility and accuracy improvement methods of replacing high-precision rotor position sensors with rotor position estimation methods in the startup mode of integrated starter generators. The system should be able to estimate rotor position across the full speed range, detect the initial position of a stationary motor in a short time, and maintain operation of the estimation method when the motor reverses.
The rotor position estimation method relies on voltage and current calculations within the motor model but is prone to errors due to inverter nonlinearities, which can reduce accuracy. Improper control during transitions between low and high-speed regions may lead to significant estimation errors, causing unbalanced three-phase currents, increased harmonics, reduced motor performance, and potential system shutdowns or damage.
To reduce rotor position errors caused by the nonlinear effects of the inverter, this thesis compensates for the rotor position estimation method by calculating the error voltage through the volt-second theorem. Simultaneously, by modulating the amplitude of the square wave voltage using the high-frequency square wave injection method under lowspeed no-load and load conditions, rotor position errors are minimized. Additionally, modulation coefficients are used as the basis for switching estimation methods during speed transition regions to reduce current surges caused by estimation errors in these regions, achieving the goal of improving rotor position estimation accuracy across the full speed range.
Experimental results validate the effectiveness of the proposed method and the feasibility of the full-speed range sensorless control method, demonstrating stable and accurate rotor position estimation capability under various operating conditions.

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