基于滑模磁通和速度观测器的异步电动机间接磁场定向控制  

Indirect Field-Oriented Control for Induction Motor Based on Sliding Mode Flux and Speed Observer

作　　者：李春菊[1] 刘国荣[1] 蔡斌军[1] 

机构地区：[1]湖南工程学院,湖南湘潭411101

出　　处：《微特电机》2009年第4期48-50,共3页Small & Special Electrical Machines

基　　金：湖南省科技计划项目(2008FJ3029)

摘　　要：针对无速度传感器异步电动机转子电阻变化所带来的问题,设计了一种间接磁场定向控制(IFOC),提出了一种新的滑模技术。所观测的磁通收敛性由所观测的电流收敛性来保证。根据估计的定子电流和转子磁链来估计转子转速和转子时间常数。估计的转子时间常数用于滑模计算和观测器结构中,估计的转速用来作为转速调节的反馈。仿真结果证明所提出的速度估算方法有效,所提出的观测器结构具有鲁棒性。Aimed to the problems caused by rotor resistance variations of speed sensorless induction motor, an indirect field orientation control（IFOC） was designed and implemented using a new sliding mode technique. The convergence of the observed flux was guaranteed by the convergence of the observed currents. The rotor speed and the rotor time constant were estimated based on the estimated stator currents and rotor flux. The estimated rotor time constant was used in slip calculation and observer structures and the estimated speed was used as feedback to the speed regulation. Simulation results of the speed control verified the validity of the proposed speed estimation algorithm and showed the robustness and performance of the proposed observer structure.

关 键 词：无速度传感器 异步电动机 间接磁场定向 仿真 

分 类 号：TM341[电气工程—电机]