摘要
将一种全阶磁链观测器引用到异步电动机的直接转子磁场定向中,研究其运行时受电机参数变化的影响.借鉴频率响应法,对比常见的电流模型磁链观测器和电压模型磁链观测器,采用数据拟合的方法对电机参数变化下的磁链观测值进行拟合,得到其参数鲁棒性结论.仿真结果表明,应用该全阶磁链观测器可以克服电机转子电阻变化的影响,减小电机定子电阻变化的影响,提高系统运行的参数鲁棒性.
A full-order closed-loop rotor flux estimator was introduced into the direct field oriented control（DFOC） in an induction motor,and the observer precision affected by motor parameter was investigated.The normal current flux observer and voltage flux observer were compared by frequency response method.Amplitude-and-phase-frequency characteristic curve method of linear time-invariant system was used to simulate the parameter robustness of the proposed full order flux observer.The simulation results indicated that DFOC system can operate with a excellent dynamic performance when rotor resistance variation,and it can reduce the influence of rotor resistance by using the proposed full order flux observer,the system′s parameter robustness improved significantly.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2011年第1期30-34,共5页
Journal of Huaqiao University(Natural Science)
关键词
异步电动机
全阶磁链观测器
磁场定向
转子电阻
参数鲁棒性
induction motor
full-order flux observer
magnetic field oriented control
rotor resistance
parameter robustness
