基于全阶状态观测器的无速度传感器DTC系统  

Speed Sensorless DTC System Based on Full-order State Observer

作　　者：奚国华[1] 沈红平[1] 喻寿益[1] 桂卫华[1] 

机构地区：[1]中南大学信息科学与工程学院

出　　处：《电气传动》2008年第7期22-25,68,共5页Electric Drive

基　　金：国家自然科学基金项目(60574030)

摘　　要：提出一种新型的自适应速度磁链观测器,它利用Matlab进行磁链观测器极点配置及增益矩阵选取。基于全阶观测器,采用李亚普诺夫稳定性理论对电机转速进行在线辨识,实现了异步电机无速度传感器直接转矩控制系统。由于电机定子电阻压降显著增加低速时转速观测误差,为提高低速运行时转速辨识精度,观测器同时辨识电机定子电阻,确保系统在低速时仍有良好的特性。仿真实验结果验证了此方案在低速时具有良好的静、动态性能和转速辨识精度。A new speed-adaptive flux observer which make use of Matlab to station the pole of flux observer and select plus matrix was put forward. Motor speed was estimated on line base on Lyapunov＇s stability theory, and in this the speed sensorless direct torque control emulation system was designed. Because the voltage lower of motor stator resistance can increase the observer error in the low speed rapidly, so in order to increase estimate precision, the observer should estimate stator resistance at the same time, then it can make sure that the system also have perfect characteristic in the low speed. The emulate experiment results validate that the scheme have perfect static dynamic performance and speed estimate precision in the low speed.

关 键 词：全阶状态观测器 直接转矩控制 无速度传感器 李亚普诺夫稳定性理论 

分 类 号：TM301.2[电气工程—电机]