基于无源性的感应电机控制系统设计

感应电机的无源性控制方法从能量的角度分析电机控制系统,具有形式简单、无奇异点、鲁棒性好等特点.本文给出了感应电机的欧拉方程并将感应电机系统分解为电气和机械两个无源子系统的反馈并联,从而说明在设计控制器时只需要考虑电气子系统,简化了控制算法.在此基础上,利用无源性控制原理,设计了电机的转矩和转速控制器.该控制算法具有全局稳定,系统鲁棒性较好的特点.仿真和实验结果均证明了用此算法构成的感应电机控制系统能很好地跟踪速度给定,具有较好的动静态响应能力.

Design of passivity-based control system for induction motors

Due to the great potential value in theory and application,nonlinear control strategies of induction motors,especially passivity-based control(PBC) methods,have been focused on.Passivity-based control is an undecoupling nonlinear feedback method using energy concept,and it analyzes the motor system and finds out the "workless force".In this way,the nonlinearity of the system need not be cancelled completely in the feedback control designing,therefore the control is simplified.At the same time,the torque and flux magnitude can be asymptotically tracked.In this paper,an induction motor model described by EulerLagrange equations is presented and decomposed as a feedback interconnection of an electrical and a mechanical passive subsystem.On this basis,the passivity-based torque and speed controllers were designed.The resulting control algorithm is globally stable without singularities and guarantees robustness to the overall system.Both the simulation and the experimental results prove that the control system based on this control law possesses nice static and dynamic performance and tracks reference speed well.