- 學位論文
應用線上參數估測改善永磁同步發電機之無位置感測控制
Improvement of the Position Sensorless Control for the Permanent-Magnet Synchronous Generator Applying On-Line Parameter Estimation
摘要
本論文旨在改善應用於永磁同步發電機之無位置感測控制。當永磁同步發電機持續輸出電流時，其線圈電阻及電感都會隨著溫度而改變，因此本論文採用遞迴最小平方法即時估測線圈電阻及電感以改善轉子角度誤差。本論文首先介紹系統架構，包括電流控制、無位置感測、線上參數估測和驅動器之硬體電路設計，並對電流控制和無位置感測器的設計進行建模和參數量測。接著推導分切合整電流控制與延伸電動勢法之無位置感測器，再由微控制器實現此兩種控制方法。在線上參數估測部分，首先選擇遺忘因子大小，接著比較使用q軸或d軸模式，並驗證估測值準確度，最後將線上參數估測值代入無位置感測器改善轉子角度誤差。 關鍵詞：永磁同步發電機、無位置感測、線上參數估測 。
並列摘要
The on-line parameter estimation is implemented in this thesis to improve the position sensorless control of permanent-magnet synchronous generator (PMSG). First, the system configuration including the current control algorithm, position sensorless scheme, on-line parameter estimation and hardware circuit design is introduced. The modeling and parameter estimation are performed for the design of current control and position sensorless control schemes. The derivations of the division-summation (D-Σ) current control and extended-EMF based position sensorless control are accomplished. The position estimation and current control are implemented by the microcontroller. In the on-line parameter estimation, the forgetting factor is first chosen. The q-axis and d-axis models are compared, and the estimating accuracy is verified. Finally, the estimated parameter is implemented in the position sensorless control to improve the rotor position error. Keywords：permanent-magnet synchronous generator, position sensorless scheme, on-line parameter estimation.