变频调速异步电动机转速辨识的研究

Study of Rotative Velocity Identification for VFD Asynchronous Motor

转速辨识的准确性直接关系异步电动机变频调速系统的性能。基于Matlab/Simulink仿真软件,完成模型参考自适应(MRAS)转速辨识下矢量控制系统的建模。在该模型下观测所得转速与实际转速的差值,决定辨识转速的精确度。研究表明,基于MRAS的无速度传感器控制系统能够较准确地辨识转速,从而提高调速系统的性能。

The accuracy of rotative velocity identification is directly related to the performance of the speed control system of the variable frequeney driving （VFD） asynchronous motor. The model of vector control system for MRAS （Model Reference Adaptive System） rotative velocity identification is built based on Matlab/Simulink simulation software. By which, the accuracy of rotative velocity identification is obtained from the observed rotative velocity and its difference to the actual one. The study shows that the non-speed sensor control system based on MRAS can accurately identify the rotative velocity and improves the performance of speed control system.