Dynamic And Steady State Coordinated Control Of PMSM Drive Systems

Permanent magnet synchronous motor(PMSM)is widely used in many fields due to its superiorities,for instance low manufacturing cost and simple structure.Therefore,tighter requirements are required for control methods of PMSM drive system.In order to ensure that PMSM control system has good dynamic and steady-state performances,from the point of view of dynamic control and steady-state control respectively,different kinds of controllers are designed,and these controllers are coordinated by using the coordinated control strategy to meet the high performance requirements of PMSM drive system.The main content of this article is:(1)The integrated time-varying sliding mode control method of PMSM velocity is studied.An integral time-varying sliding mode controller was designed based on the feedback linearization principle.In order to deal with external load disturbance better,an extended state observer was proposed.Using the Links-RT semi-physical simulation platform for the integral time-varying sliding mode control for experiment and analysis,and comparing with traditional sliding mode control.The experimental results fully show that speed tracking response is faster of this control method and dynamic performance is more stable,the extended state observer designed also improve the performance of PMSM drive system against load disturbance.(2)The backstepping integral sliding mode and the port-controlled Hamiltonian(PCH)coordinated control method of PMSM speed is studied.Considering that the actual PMSM system needs to have superior dynamic and steady state performances,the dynamic controller is backstepping integral sliding mode controller,and the steady state controller is state PCH controller,and the coordination function is designed to form the coordination controller with time as the independent variable.The Luenborg observer is designed to track the external load disturbance.The simulation experiments of the proposed time coordination control method are carried out by using Matlab software,and it is proved that the proposed method is effective.This method can fully combine the advantages of the backstepping integral sliding mode controller and state PCH controller,meet the high performance requirements of PMSM drive system.(3)The feedback linearization of PMSM speed and the state-error PCH coordinated control method are studied.In order to complete rapid response speed,feedback linearization control method is designed,and the state-error PCH control method was designed to make the steady state accuracy of speed higher.In order to combine the advantages of two controllers,a Gaussian coordination function was designed to form a coordination controller based on error as the independent variable.The method is verified by simulation experiments with MATLAB software,it is proved that the proposed coordination control method can make different controller give full play to their role in different times.The PMSM drive system in the case of steady state energy losses to a minimum guarantee to achieve faster dynamic response,the system has more superiority in dynamic and steady state performances.