基于模型参考自适应的异步电机矢量控制系统

以异步电动机矢量控制的基本方程式为基础,构建了一个无速度传感器矢量控制系统。该系统的转速估计采用模型参考自适应控制理论,并对自适应机构以分段变参数方式进行改进,以提高估计速度和精度;转速调节器利用模糊自适应PI进行改进,以提高异步电机的可靠性和鲁棒性。仿真结果表明,该控制系统动态性能良好,转速估计能快速准确地跟踪,系统具有较强的鲁棒性和稳定性。

Vector Control of Asynchronous Motor Based on Model Reference Adaptive System

A speed sensorless vector control system was established based on the fundamental equation of vector control of asynchronous motor. The theory of model referencing adaptive control was applied to the system rotor-speed-estimation and the adaptive institutions were modified by way of segmented variable parameters in order to improve the estimation speed and accuracy; The adaptive fuzzy PI control was brought in speed regulator to improve the reliability and robustness of asynchronous motor. Simulation results showed that the system had a better dynamic performance and tracked the variation of the motor speed accurately, and it had strong robustness and stability.