基于MRAS的异步电机无速度传感器矢量控制  

Speed-sensorless Vector Control System of Induction Motor Based on MRAS

作　　者：黄倩[1] 曹薇薇[1] 贾晨曦[1] 

机构地区：[1]中国矿业大学文昌校区信电学院

出　　处：《变频器世界》2010年第8期54-58,共5页The World of Inverters

摘　　要：异步电机无速度传感器矢量控制系统中的速度辨识方法是目前研究的热点,其中MRAS由于其原理简单、实用性较强等优点,在交流调速系统中得到了广泛应用。本文采用改进的电压型转子磁链估算模型,避免了由纯积分环节造成的积分漂移等问题,采用可变PI型自适应律,结构简单且具有较好的辨识效果,最后给出了转子磁场定向的无速度传感器矢量控制系统的实现,仿真结果表明该系统具有良好的动静态性能,且具有一定的抗干扰能力。In recent years, the sensorless control technology of induction motor has al- ready been a popular problem. The speed estimation is the core. Because of its simple in principle and practical, the algorithm of MRAS.has been widely applied in the AC Drive system. In this paper, an improved voltage-model is proposed to avoid the integral drift caused by pure integral. The adaptive law of variable PI is adopted. Finally, the rotor field-oriented speed-sensorless vector control system is given out. The simulation results show that this MRAS speed estimation model has satisfied estimation precision and dynamic performance while having a certain anti-interference ability.

关 键 词：异步电机 矢量控制 无速度传感器 模型参考自适应 

分 类 号：TM343[电气工程—电机]