• 改進滑模變結構永磁電機控制器研發
    中國測試期刊

    張自友, 周大鵬
    (樂山師范學院物理與電子工程學院,四川 樂山 614004)
    摘  要:為克服傳統滑模觀測器對永磁同步電機進行無傳感器控制時存在高頻抖振和轉子位置估算不精確的缺陷,提出一種基于改進滑模觀測器的PMSM控制器設計方法。首先,建立PMSM的數學模型并分析傳統滑模觀測器轉子位置估計原理和缺陷,然后,采用低通濾波器對電流誤差開關信號進行濾波并對轉角進行補償,采用飽和函數代替開關函數以減少滑模運動的高頻抖動,最后,采用李亞普若夫穩態判定方程證明設計的改進觀測器的穩定性。系統測試表明:該方法能較為準確地對PMSM的轉子位置和速度進行估算,具有較高的估算精度。
    關鍵詞:永磁同步電機;滑模;無傳感器;控制器
    中圖分類號:TM351;TM571.1;TP302.7;TM930.12     文獻標志碼:A     文章編號:1674-5124(2013)04-0081-04
    Control design for permanent magnet synchronous motors based on improved
    sliding mode variable structure control
    ZHANG Zi-you, ZHOU Da-peng
    (College of Physics and Electronic Engineering,Leshan Normal University,Leshan 614004,China)
    Abstract: In order to overcome the defects of chattering and the inaccuracy estimation of rotor position when the traditional sliding mode observer was used to control the PMSM, a design method based on improved sliding mode observer was proposed. Firstly, the mathematical model of PMSM was given and the rotor position estimation principle and its defects of the traditional sliding mode observer were analyzed. Then, the low pass filter was used to filter the current error switch signal and compensate the rotor angle, and the saturation function was used to replace the switch function for reducing the chattering. Finally, the stability was proved to build the equation. Experimental results show that this method can estimate the speed and rotor position with high accuracy. It is proved as an effective control method for PMSM.
    Key words: PMSM; sliding mode; senorless; control
     
     
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