异步电机自适应矢量控制系统研究

Study on Adaptive Vector Control System of Induction Motors

提出了一种速度自适应的转子磁链闭环观测器.并应用于矢量控制系统中.以取代传统的纯积分器。经过理论证明,该系统是超稳定系统。针对1.1kW感应电机.采用MATLAB/SIMULINK仿真软件对系统进行仿真,仿真结果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。同时,基于磁链状态观测器设计的速度辨识方案收敛速度快.精度高.尤其是在较低转速下仍能保持很高的精度。

A speed adaptive flux observer of an induction motor will be proposed to replace the classical pure integrator in the vector control system.The resulting system is verified to be hyperstatic. This approach has been implemented in a 1.1kW drive with MATLAB/SIMULINK. Simulation shows that the adaptive observer gives very satisfied estimation result of rotor flux and the rotor speed, especially near zero speed, and offers greatly yobustness to parameter variation.