异步电机转子磁链观测器的准确度分析与设计

提出一种基于频率响应函数的转子磁链观测器准确度分析方法 ,推导出两种基本开环转子磁链观测器观测值相对实际值的频率响应函数 ,分析了电机参数的估计值偏离实际值对观测值准确度的影响 .应用Gopinath最小阶观测器理论设计了一种新型闭环转子磁链观测器 .实例分析表明 ,此方法能对转子磁链观测器准确度进行透彻分析 ,设计的闭环转子磁链观测器结构简单 ,综合了电流模型和电压模型开环转子磁链观测器最好的特性

The Accuracy Evaluation and Design for Rotor Flux Observers of Induction Motor

A method of accuracy evaluation for rotor flux observers of induction motor is presented based on the analysis of frequency response function. The functions relating to the estimated and actual fluxes for two basic forms of open-loop rotor flux observers are derived. The effect of machine parameter deviations from actual values on the accuracy of rotor flux observers is analyzed. The Gopinath′s minimal order observer theory is applied to design a new closed-loop rotor flux observer. It is shown that the proposed method is useful and insightful and the new rotor flux observer is a straightforward structure combining the best features of current model and voltage model open-loop rotor flux observers.