改良轉子位置估測之永磁同步馬達直接轉矩控制;Direct Torque Control of Permanent Magnet Synchronous Motor with Improved Rotor Position Estimation

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/84167

Title:	改良轉子位置估測之永磁同步馬達直接轉矩控制;Direct Torque Control of Permanent Magnet Synchronous Motor with Improved Rotor Position Estimation
Authors:	鍾嘉倫;Chung, Chia-Lun
Contributors:	電機工程學系
Keywords:	永磁同步馬達;最小平方法;空間向量脈波寬度調變;直接轉矩控制;Permanent magnet synchronous motor;least square method;space vector pulse width modulation;direct torque control
Date:	2020-07-28
Issue Date:	2020-09-02 18:26:10 (UTC+8)
Publisher:	國立中央大學
Abstract:	本論文提出了使用低解析度的霍爾感測器，改良轉子位置估測方法並應用於永磁同步馬達(Permanent Magnet Synchronous Motor, PMSM)控制。霍爾感測器只能偵測馬達換相時的轉子角度位置，在其它位置則藉由估測來獲得。但是由於其本身低解析度的特性，加上安裝誤差導致不對稱偏移，造成在位置估測上造成誤差，無法得到準確的轉子位置，使得系統不穩定。為了解決霍爾感測器低解析度及位置偏差的問題，本論文利用霍爾感測器的換相點來估測轉子位置，提出了使用最小平方法，來降低位置誤差且達到和高解析度感測器一樣的效果。以此位置估測方法，應用於一種結合空間向量脈波寬度調變(Space Vector Pluse Modulation , SVPWM) 和直接轉矩控制(Direct Torque Control, DTC)的方法來控制永磁同步馬達。;This thesis proposes a low-resolution Hall sensor to improve the rotor position estimation method and apply it to the Permanent Magnet Synchronous Motor (PMSM) control. The Hall sensor can only obtain the angular position of the rotor when the motor is commutated, and it can be obtained by estimation at other times. Based on its low resolution characteristics, coupled with installation errors, it leads to an asymmetric offset, resulting in errors are caused in the position estimation, and the accurate rotor position cannot be obtained, making the system unstable. In order to solve the problem of low resolution and position deviation of the Hall sensor, this article proposes to use the least square method and use the commutation point of the Hall sensor to estimate the rotor position to reduce the position error and achieve high resolution degree sensor like effect. In addition to the position estimation method, a method combining Space Vector Pluse Modulation (SVPWM) and Direct Torque Control (DTC) is also used to control the motor.
Appears in Collections:	[Graduate Institute of Electrical Engineering] Electronic Thesis & Dissertation

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