异步电机的精确控制和速度辨识是交流传动系统中重要问题。该仿真模型在异步电机的数学模型、矢量控制原理及速度辨识算法的基础上，利用Matlab/Simulink仿真软件中SimPowerSystems模块，构建了基于MRAS无速度传感器的异步电机矢量控制系统。-The precise control and the speed identification of AC motor are the very important issues on AC drive system. In this paper, on the basis of analyzing the mathematical model of AC motor, the principle of vector control and the algorithm speed identification, the speed sensorless vector control system of induction motor based on MRAS is constructed on SimPowerSystems modules of Matlab/Simulink simulation software.