基于状态观测器的异步电机定子磁链观测和速度辨识  

Stator Flux Linkage and Speed Estimation of Induction Motor Based on Full-Order State Observer

作　　者：宋文祥[1] 曹大鹏[2] 陈国呈[2] 陈陈[1] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]上海大学机电工程与自动化学院,上海200072

出　　处：《上海大学学报（自然科学版）》2008年第4期349-354,共6页Journal of Shanghai University:Natural Science Edition

基　　金：上海市重点学科建设资助项目(T0103)

摘　　要：提出一种基于全阶观测器的感应电机磁链估计方法,系统地给出了这种观测器的设计过程.仿真研究表明,该方案对电机参数变化的鲁棒性较好,磁链观测精度高.根据李雅普诺夫稳定性原理推导出基于自适应状态观测器的直接转矩控制系统速度辨识算法,其收敛速度快、精度高.基于状态观测器方案在准确观测电机磁链的同时,可实现高性能的无速度传感器运行.A method for designing full-order state observer for induction motor is proposed, in which the state variables are stator current and stator flux linkage. The design method for the state observer is given systematically. Simulation results show that the observer has satisfactory estimation performance of stator flux. Based on the adaptive full-order observer, a speed estimation method is obtained based on the Liapunov stability theorem. With the proposed full-order observer, the flux linkage of motor can be accurately observed and high performance achieved without shaft encoder.

关 键 词：交流异步电机 状态观测器 极点配置 直接转矩控制 

分 类 号：TM464[电气工程—电器]