基于感应电机状态方程的定子电阻辨识方法的研究

基于感应电机两相同步旋转坐标系状态方程,提出了一种新的定子电阻辨识方案。在分别利用励磁电流微分方程和转矩电流微分方程推算转速的基础上,利用二者的等量关系实现了定子电阻在线辨识。该方案的优点是,定子电阻估算仅需要电机终端可测的定子电压、电流,无须借助转子或定子磁链。仿真实验将其应用于无速度闭环矢量调速系统,实时更新转速估算模块中的定子电阻,论证了该方案对电机参数变化鲁棒性强及对改善转速估算精度的有效性。

Speed Estimation Method Based on State Equations of Induction Motor

Based on the state equations of induction motor on two-phase synchronous rotating coordinate system,a new identification of stator resistance scheme is proposed in this paper.On the base of estimating speed through the excitation current differential equation and torque current differential equation,identification of stator resistance is proposed through equivalent relation.The scheme has many advantages such as stator resistance estimation without the aid of the stator flux or rotor flux,need stator voltage and current which can be measured.