摘要
以电压模型为参考计算转子磁链矢量的感应电机模型参考自适应控制(MRAC)转速观测器的性能受到电压模型对直流偏移和低速下对定子电阻敏感性的影响。针对这两个因素,通过引入复增益和变截止频率低通滤波器得到了无直流偏移的等效电压模型,并提出了基于转子反电动势矢量的MRAC定子电阻在线辨识方法。搭建了感应电机直接磁场定向无速度传感器控制系统,通过实验证明了所提方法的正确性与可行性。
Speed observer of induction machines based on rotor flux model reference adaptive control （MRAC） suffers from sensitivity of reference voltage model towards DC offset and stator resistance at low speeds.To resolve this prob- lem, complex gain and low pass filter with variable cut-off frequency are introduced to build an equivalent voltage model without DC offset.Moreover,a strategy of online identification of stator resistance based on back electromotive force MRAC is proposed.A induction machine control system is built,experimental results verify the proposed method.
出处
《电力电子技术》
CSCD
北大核心
2017年第12期117-119,共3页
Power Electronics
基金
广东省重大科技项目(2014B010125002)~~
关键词
感应电机
电压模型
模型参考自适应控制
定子电阻在线辨识
induction machine
voltage model
model reference adaptive control
online identification of stator resistance
