组合式磁链观测器研究及其在异步电机矢量控制系统中的应用  

Combined Flux Observer and Its Application to Vector Control System of Induction Motor

作　　者：张斌[1] 张增华[1] 袁亮[1] 高鹏[1] 

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070

出　　处：《信息与控制》2017年第5期634-640,共7页Information and Control

摘　　要：依据带通滤波器和纯积分器在原点处零极点的相互抵消对电压模型做出改进,使得对异步电机的转子磁链估算更加准确.由于改进的电压模型在电机起步运行速度较低时存在缺陷,本文提出结合磁链观测的电流模型构建组合模型磁链观测器.通过仿真实验的方法推导出分段函数的参数,从而获得了更高性能的磁链观测结果.在Matlab/Simulink仿真平台中搭建基于组合模型观测器的矢量控制系统仿真模型,仿真结果表明:组合模型的误差曲线在低速阶段和高速阶段分别与两种观测器模型的误差曲线重合,在速度的过渡阶段介于两者之间.实验结果证明,组合模型能够准确计算电机转子的位置信息,动态响应性能良好.This paper is based on the principle that the pole of a band-pass filter and the zero of pure integrator offset each other at the origin to improve the voltage model.The rotor flux estimation of the induction motor is accurate.However,the improved voltage model still has the disadvantages of poor performance and low speed.Thus,the current model combined with the voltage model flux observer is proposed to construct a combined model flux observer.The parameters of the piecewise function are derived through a simulation experiment,and the combined model flux observer performed efficiently on the basis of the flux observation results.The simulation model of the combined model rotor flux observer is built in the Matlab/Simulink simulation platform.Simulation results show that the error curve of the combined model is coincident with the error curve of the two observer models at low and high speeds.However,the error curve of the combined model in the transition phase of speed is between that of the voltage model and the current model.Experimental results show that the combined model can accurately calculate the rotor position and has good dynamic response.

关 键 词：异步电机 带通滤波器 分段函数 组合模型 矢量控制系统 

分 类 号：TM343[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]