Research On Control Strategy Of Permanent Magnet Synchronous Motor Based On Synergetic Theory

In recent years,permanent magnet synchronous motor(PMSM)has been widely used in the field of modern industry due to environmental protection and energy saving advantages.PMSM has played an important role in the field of high precision and high speed servo.Various control schemes of PMSM have been developed so that the requirements for PMSM control system performance are also increasing.Surface-mounted permanent magnet synchronous motor(SPMSM)is studied in this paper.The vector control and Space Vector Pulse Width Modulation(SVPWM)technology are introduced in this paper and the theory of synergetic control is introduced in the control strategy research of PMSM.Then,this paper aims at studying the dynamic response speed and the steady-state precision of PMSM control system.Based on the traditional vector control technology,several control schemes of permanent magnet synchronous motor are deduced and their feasibility is proved through the simulation and experiment.Secondly,the concept of manifold is introduced.The second-order system is taken as an example to illustrate the solution of the synergetic control algorithm.Because external disturbance(load torque)is a variable in the synergetic control algorithm,the load torque of PMSM is observed by sliding mode load torque observer and reduced-order observer.In order to make the control system more accurate,the identification of the moment of inertia of PMSM is increased Combined with the motion equation of SPMSM,the algorithm of PMSM is studied,and the mathematical analytic solution of the variable is deduced to form a simple and effective hysteresis control system.Through the improvement of manifold,an integral synergetic control system is formed,and the principle of selection of controller parameters is given.Through the control method,any fast dynamic response and small steady-state error may be made.Combined with the state space equation of PMSM,the traditional PI control is omitted,and the mathematical solution of the stator voltage is deduced through variable substitution.By analyzing the change of stator resistance and moment of inertia,the robustness of the synergetic control algorithm is verified.Finally,taking TMS320F2812 as the control core,the algorithm is implemented on PESX-Ⅱ power electronics and electric drive experiment platform.The closed-loop experiments in the synergetic control algorithm and traditional PI algorithm are carried out.The parameter adjustment of the synergetic control is simpler and more efficient.The correctness and feasibility of the synergetic control algorithm in PMSM are also verified.