基于无功功率的永磁同步电机转速辨识

Speed Estimation of Permanent Magnet Synchronous Motor Based on Reactive Power

传统的模型参考(MRAS)转速辨识是基于永磁同步电机理想的参考模型,要想准确地辨识出电机的转速需要准确地知道电机各种参数,但由于电机运行在不同条件下会导致参数发生变化,使得辨识系统性能变差。介绍了一种采用电机定子电流无功功率作为参考模型的永磁同步电机模型参考自适应系统,并结合矢量控制,利用Matlab进行了仿真分析。仿真结果表明采用上述无功功率参考模型的转速辨识系统具有良好的稳态性能,能够快速地辨识出电机转速,且依赖电机参数较少。

Traditional model reference adaptive system(MRAS)speed identification is based on the ideal reference model of permanent magnet synchronous.In order to accurately determine the speed of the motor need to know exactly the motor parameters,but the motor runs under different conditions will lead to changes in parameters,which make poor performance of identification system.So introduced a model reference adaptive system based on reactive power of stator current.Combined with vector control and simulation analysis were based on Matlab.The simulation results show that the speed estimation system based on model reference adaptive system of reactive power has good steady-state performance,identify motor speed quickly and use less parameter of permanent magnet synchronous motor.