矢量控制系统中转子电阻辨识方案的仿真研究

Simulation Analysis on Rotor Resistance Estimation Method for Vector Controlled IM Drives

设计了一种基于自适应磁链观测器的无速度传感器感应电机矢量控制系统,给出了转速和转子电阻的辨识率,保证了系统在全速度范围内能够稳定运行。通过仿真和实验,对转子电阻随温度的变化对无速度传感器控制系统的影响进行了模拟研究。研究结果表明:给出的转子电阻的辨识方案具有更快的收敛速度;转子电阻的辨识对电机的速度辨识具有很好的修正作用。

An adaptive flux observer was designed for a speed sensorless vector controlled induction motor drive in which the rotor resistance value was updated during operation and a new speed-adaptive law was given. The sensorless drive system was capable of steadily working in whole speed range from very low speed to high speed and exhibits good dynamic and steady-state performance. The impact of the rotor resistance change on the speedless vector control system was at first verified by simulation and then by extensive experimentation. The result shows that the proposed rotor resistance estimator has a better dynamic performance, and is capable of modifying the estimated speed effectively.