摘要
提出了一种具有自适应转子电阻估计器的感应电机的逆解耦控制方法。首先通过非线性状态反馈获得感应电机的逆系统,将感应电机这个多变量、非线性、强耦合的对象动态解耦成转速与转子磁链两个二阶子系统;然后,采用模型参考自适应系统(M RA S)理论来设计转子电阻估计器,在线估计时变的转子电阻,从而保证在整个电机运行区域内,转速与磁链之间的输入输出解耦关系不变;最后,分别设计线性控制器对转速与磁链子系统进行闭环控制。仿真结果表明,提出的控制方案具有优良的动态和静态性能,且对电机参数变化具有强鲁棒性。
A novel inverse decoupling control method with the adaptive rotor resistance estimator for induction motor is proposed in this paper. First, the inverse system of the induction motor is obtained by means of nonlinear state feedback. Consequently, the multivariable, nonlinear and strongly coupling induction motor is deeoupled into two independent second-order linear subsystems, the speed and flux subsystem. Then, a rotor resistance estimator is designed based on model reference adaptive system （MRAS） theory to give the estimated value of the rotor resistance on-line, which assures that the input-output decoupling relationship between speed and flux is true in all drive range. Last, the two linear controllers are designed respectively to control the speed and flux subsystem. Simulation results show that the proposed control scheme possesses excellent control performance and good robustness against parameter variation.
出处
《电气传动》
北大核心
2005年第11期36-40,共5页
Electric Drive
基金
江苏省高校自然科学基金资助项目(03KJB510041)
