摘要
矢量控制系统的性能很大程度上依赖于电机参数的准确测量,而异步电机的转子电阻在电动机运行中由于温升、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。文中提出了一种基于模型参考自适应的转子电阻辨识的方法,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。仿真结果表明。该方法可以准确、快速的辨识转子电阻,并且提高了系统的鲁棒性。
The pertormance of the vector pends on the precise measurements of motor parameters, 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. A rotor resistance estimation method based on the instantaneous reactive power (IRP) by means of MRAS system is proposed, and it gets the suitable rotor resistance value by self-adaption. Simulation results are given to verify that the proposed algorithm is useful to identify the rotor resistance accurately and rapidly so as to enhance its robustness.
出处
《电机技术》
2008年第1期5-8,共4页
Electrical Machinery Technology
关键词
参数辨识
模型参考自适应理论
异步电机
转子电阻
瞬时无功功率
Parameter identification Model reference adaptive system Asynchronous motor Rotor resistance Instantaneous reactive power