矢量控制中感应电动机转子电阻的自适应辨识

Rotor Resistance Adaptive Identification for Vector Control of Induction Motors

异步电动机的转子电阻在电机运行中由于温升、集肤效应等原因 ,往往是电机控制系统中变化最为明显的参数之一。如何准确、快速的辨识异步电动机转子电阻 ,以提高整个矢量控制系统的鲁棒性 ,一直以来是国内外研究的重点。转子电阻对异步电动机调速系统的影响由于控制策略和控制结构的不同而有所差别。本文在异步电动机矢量控制系统中提出了一种基于转子磁场定向的转子电阻自适应辨识方法。这种方法结构简单 ,计算量少 ,而且仿真和实验结果证明这种方法可以准确、快速的辨识转子电阻。

In the vector control of an induction motor,the rotor resistance is one of the most important parameters,and its variation is very significant because of the temperature rise and skin effect during the implementation of vector control.In order to improve the robustness of the control system the rotor resistance must be identified accurately and rapidly.In this paper,a novel method of rotor resistance adaptive identification based on rotor flux orientation is proposed.Simulation and experimental results are given to verify that the proposed algorithm is useful to identify the rotor resistance accurately and rapidly.