摘要
文中提出了一种基于电压解耦原理的简化的感应电机模型。通过在定子电压指令中增加解耦项,即在励磁和转矩信号输入端增加一个标量解耦环节,以消除感应电机的内部耦合。根据该模型,设计了一个转子磁通t轴分量控制器,获得了转子速度的辨识方法。另外,在动态过程中,当电机参数特别是转子电阻发生变化时,通过加入转子磁通角偏移的补偿环节,可以确保转子磁通获得快速、准确的定向。同时,也分析了转子电阻变化对速度辨识精度所产生的影响。仿真和实验验证了所提方案的有效性。
This paper describes a simplified model of induction motor based on voltage decoupling control principle. We add decoupling terms of stator voltage commands of induction motor, namely, add a scalar quantity decoupling tache between excitation and torque signal input port to cancel the inner coupling action of induction motor. According to this model, a speed identification method is presented, which uses t-axis flux to obtain rotor speed estimated value. In addition, when the parameters of motor changes such as rotor resistance especially, we can add compensating terms of the deviation of rotor flux-angle to insure fast and exact orientation of rotor flux. At the same time, the influence on precision of estimated speed is also analyzed when the rotor resistance changes. The validity of the proposed method is verified by computer simulation and experiment results.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第14期98-102,共5页
Proceedings of the CSEE
关键词
电机
无速度传感器
辨识
矢量控制
电压解耦控制
Electric machinery
Speed sensodess
Identification
Vector control
Voltage decouping control
