低定子频率下消除电流测量误差的磁链观测器  

Flux Observer for Elimination of Current Measurement Error at Low Stator Frequency

作　　者：周二磊[1] 符晓[1] 伍小杰[1] 戴鹏[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,徐州221008

出　　处：《电工技术学报》2011年第6期67-72,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51077124);江苏省2009年度普通高校研究生科研创新计划(CX09B_113Z);江苏省"青蓝工程"资助项目

摘　　要：随着控制性能要求的提高,电流测量误差对电励磁同步电动机控制性能的影响愈加显著。从电流测量路径看,产生误差不可避免,直流偏移和比例不平衡误差会造成转速周期性地波动。本文采用一种简单的谐振式观测器对低定子频率下存在的电流测量误差进行补偿,并且为了消除残余误差,纯积分磁链观测器采用了残余误差补偿器以精确观测磁链。最后,基于Matlab/Simulink对电流两相传感器的电励磁同步电动机调速系统进行仿真,仿真结果证明了该方案的有效性。As higher performance of control system is required,current measurement error seriously affected the control performance of electrically excited synchronous motor.The errors generated from the current measurement path are inevitable,such as offset currents and gain deviations,which causes the periodic rotor speed ripples.This paper presents a simple resonant type observer to compensate current measurement errors for the pure-integration-based flux estimation at a low stator frequency.The technique further contains a residual error compensator to eliminate miscellaneous residual error of the integrator.Finally,this paper uses the Matlab/Simulink to simulate excited synchronous motor with two phase current sensors.The simulation results show the effectiveness of the proposed scheme.

关 键 词：电流测量误差 谐振式观测器 纯积分磁链观测器 电励磁同步电动机 

分 类 号：TM341[电气工程—电机]