基于Fuzzy-PI和MRAS的异步电机变频调速系统的设计与仿真

针对PI调节器和有速度传感器的异步电机矢量控制系统,提出Fuzzy-PI和MRAS相融合的无速度传感器的变频调速系统.以转子磁链的电流和电压模型分别计算得到转子磁链的期望值和估计值,构建了基于MRAS的转速辨识方程,根据比例、积分参数的特点,建立一套与转速调节器相匹配的Fuzzy-PI算法,并利用MATLAB/Simulink软件,搭建了异步电机变频调速系统的仿真模型.仿真实验结果表明Fuzzy-PI和MRAS相融合的无速度传感器的变频调速系统具有响应速度快、超调量小、辨识精度高等优良品质,为异步电机的调速系统提供一种新思路.

Design and Simulation of Variable-frequency Speed Regulation Systems of Asynchronous Motor Based on Fuzzy-PI and MRAS

In the report, aimed at the PI regulator and the asynchronous motor vector control system with speed sensor, the speed sensor less adjusting speed system which is the integration of Fuzzy-PI and MRAS was pro- posed. The expectations and estimates of rotor flux were calculated by its current and voltage model, respective- ly, the speed identification equation which is based on MRAS was constructed. According to the characteristics of proportional and integral parameter, a set of Fuzzy-PI algorithm that matches the speed regulator was estab- lished. The simulation model of induction motor adjusting speed system was set up by the MATLAB/Simulink software. The simulation experiment results showed that the system have good qualities such as fast response, small overshoot and high precision identification, which provides a new idea for the induction motor adjusting soeed system.