改良式初始位置估測與高頻注入法之永磁同步馬達無感測控制;Improved Initial Position Estimation and High-Frequency Injection Method for Sensorless Control of Permanent Magnet Synchronous Motors

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Title:	改良式初始位置估測與高頻注入法之永磁同步馬達無感測控制;Improved Initial Position Estimation and High-Frequency Injection Method for Sensorless Control of Permanent Magnet Synchronous Motors
Authors:	戴嘉鋐;TAI, CHIA-HUNG
Contributors:	電機工程學系
Keywords:	永磁同步馬達;脈波電壓注入法;高頻電壓注入法;無感測器;磁場導向控制;Permanent magnet synchronous motor;pulse voltage injection method;high frequency voltage injection method;sensorless;field oriented control
Date:	2024-07-22
Issue Date:	2024-10-09 17:07:22 (UTC+8)
Publisher:	國立中央大學
Abstract:	本文研究當永磁同步馬達在磁場導向控制方法中，在馬達靜止時以改良式脈波電壓注入法注入不同角度電壓向量，依據磁飽和效應使得馬達激磁電感和電流會因轉子位置不同產生變化，進而估測出轉子初始位置，並結合高頻電壓注入法取代位置感測器，透過注入高頻電壓和提取出回授電流中的高頻訊號，解析出其中的位置誤差訊號估測出馬達轉速和角度。本論文使用改良式脈波電壓注入法，減少脈波電壓注入次數同時減少角度估測誤差增加解析度，並結合高頻訊號提取方法，解決傳統方法在表貼式永磁同步馬達在L_d≅L_q凸極性不明顯的情況下造成的估測失敗，並減少帶通濾波器所造成的相移問題減少估測誤差，同時簡化演算法流程，達成無位置感測器控制。 ;This thesis discusses when the permanent magnet synchronous motor is used in the field-oriented control method. When the motor is stationary, an improved pulse voltage injection method injects voltage vectors at different angles. According to the magnetic saturation effect, this causes changes in the motor′s excitation inductance and current due to variations in rotor position, thereby estimating the initial position of the rotor. Furthermore, by combining the high-frequency voltage injection method to replace position sensors, injecting high-frequency voltage and extracting high-frequency signals from the feedback current, the position error signal is analyzed to estimate motor speed and angle. This thesis proposed an improved pulse voltage injection method to reduce the number of pulse voltage injections, thereby decreasing angle estimation errors and increasing resolution. By combining a high-frequency signal extraction method to solve estimation failures caused by no obvious salient pole effect in L_d≅L_qin surface-mounted permanent magnet synchronous motors using conventional methods. Additionally, it reduces estimation errors resulting from phase shifts caused by bandpass filters, simplifies algorithm processes, and achieves sensorless control.
Appears in Collections:	[Graduate Institute of Electrical Engineering] Electronic Thesis & Dissertation

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