感应电动机定子磁链与转矩解耦自适应控制

ADAPTIVE STATOR FLUX AND TORQUE DECOUPLING CONTROL OF INDUCTION MOTORS

基于非线性状态变换和状态反馈,提出了感应电动机定子磁链和转矩的精确解耦控制策略。并针对电动机运行过程中定子和转子电阻值随温度升高而发生变化,提出了自适应解耦控制律,确保了电阻估计误差的收敛以及定子磁链和转矩对各自参考值的渐近跟踪。通过理论分析证明了自适应反馈控制的收敛性和整个闭环系统的稳定性,最后数字仿真验证了系统的控制性能。

An exact decoupling control for stator flux and torque of induction motors is proposed first, which is based on the nonlinear state space change of coordinates and nonlinear state feedback. Then, an adaptive decoupling controller is designed for the stator and rotor resistances of the motors, which values are variable with the temperature of motors. The proposed adaptive decoupling controller guarantees the bounded estimated errors of the resistances and the output regulation performance. The convergence of the proposed decoupling controllers and the asymptotic stability of the whole system are proved by the theoretical analysis. The simulations illuminate the performances of the proposed system.