一种基于模型参数自适应理论的异步电动机转子电阻辨识实验研究

Identification Method of Rotor Resistance of Asynchronous Motor Based on Model Reference Adaptive System

矢量控制系统的性能很大程度上依赖于电动机参数的准确测量,而异步电动机的转子电阻在运行中由于温升、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。怎样快速、准确地辨识异步电动机的转子电阻,以提高整个控制系统的鲁棒性一直是国内外研究的重点。提出了一种基于模型参考自适应的转子电阻辨识方法。以瞬时无功功率作为模型,通过自适应调节得到所需的转子电阻参数。仿真和实验结果表明,这种方法可以准确、快速辨识转子电阻,并且提高了系统的鲁棒性。

To great extent the performance of the vector control depends on the precise measurements of motor parameters, but in the control of asynchronous motor system, 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 control. How to know the rotor resistance of asynchronous motor fast and accurate and to enhance the entire control system robustness are always the key point of the research. A rotor resistance estimation method based on the instantaneous reactive power （IRP） model MRAS is proposed, and it get the suitable rotor resistance value by self-adaption. Simulation results are given to verify the rotor resistance accurately and rapidly, and enhances its robustness.