基于MRAS的改进型无速度传感器矢量控制系统仿真

Improved Simulation for Sensorless Vector Control System on MRAS

以异步电机矢量控制的基本方程式为基础,提出了一种基于模型参考自适应(MRAS)理论的异步电动机无速度传感器矢量控制系统的设计方案。针对传统的MRAS采用纯积分器易引起误差累积和直流偏移问题,通过增加滤波器改进了转子磁链估算模型。以Matlab/Simulink为平台对系统进行了仿真,结果显示,电机转速误差约为1%,说明该系统动态性能良好,有较好的负载扰动抑制能力。

The speed sensorless vector control system was established based on the fundamental equations of induction motor for vector control.This paper proposes a novel scheme for a speed sensorless vector control system of induction motor based on MRAS.As the traditional MRAS uses pure integrator,which results in accumulated error and DC offset problem easily,the paper presents the improved integral model rotor flux estimation model by increasing filter.On the platform Matlab/Simulink,the system was simulated.Simulation results show that the motor speed error is approximately 1%,and the system has better dynamic performance and better load disturbances attenuation.