摘要
研究了一种模型参考自适应系统(model reference adaptive system,MRAS)方案,用于永磁同步电机(permanent magnet synchronous motor,PMSM)无速度传感器矢量控制系统的转速辨识。以PMSM为参考模型,电机的电流模型为可调模型。设计了自适应律PI调节器参数,达到了可调模型能稳定跟踪参考模型的目的,实现了PMSM无速度传感器矢量控制系统的转速和位置估算。仿真结果表明,所提出的转速辨识方法在高低速均能准确检测到转子的速度和位置,系统具有较好的鲁棒性和良好的动静态运行性能。
A method of MRAS observer for speed identification was proposed in a speed sensorless vector control system of PMSM.This strategy selects PMSM itself as the reference model and its current model as the adjustable model.By designing the adaptive PI regulator parameters,adjustable model achieved the purpose of tracking the reference model,the rotor position and speed was accurately estimated in speed sensorless vector control system of PMSM.Simulation results show that the proposed method is capable of precise estimating the rotor position and speed under the condition of high or low speed.The system has stronger robustness and good static and dynamic performance.
出处
《机电一体化》
2014年第11期20-24,73,共6页
Mechatronics
