The Study On Coordinated Control Of Coupled Induction Multi-Motor System

In recent years, with the continuous development and application of modern power electronics and advanced control theory, more and more induction motor is applied to the field of modern industrial applications and rail transportation. At the same time, in the field of industrial applications and rail transportation, there are a lot of multi-motor system, and most of the multi-motor system in the practical application is a parallel multi-motor system, due to the work environment and different connection between the motors, usually the multi-motor system will have interaction coupling force between the motors, and this coupled force will produce a corresponding impact on the coordinated control of multi-motor system of induction motor. Therefore, It has a very important practical significance to study the coordinated control problem of two coupled induction motorisystem.Firstly, This paper establish mathematical model of the two coupled induction motor system and studies the robust stability problem of the two coupled induction motor system. Based on interval matrix theory and Lyapunov stability theory, by analyzing the stability of state-space model of the two coupled induction motor system, We obtain the robust stability sufficient condition of the two coupled induction motor. Then we give the simulation analysis for two coupled induction motor on different parameters. The simulation results show that two coupled induction motor system can restored rapidly to pre-disturbance state after different pulse interference, which indicate that the two coupled induction motor system has good robustness.Next we study the coordination problems of two coupled inducion motor. Based on lyapunov theory, we give the LMI condition for the coordinated problem of two coupled induction motor system, the status feedback coordination controller is obtained by solving the LMI.At last, we give the simulation results for two coupled induction motor system on different parameters, the simulation results show that the rotor speed of two coupled induction motor system on different parameters can achieve consistent by the state feedback coordinated controlller.