Model Predictive Control Of Permanent Magnet Synchronous Motor Based On Active Disturbance Rejection Technology

Permanent magnet synchronous motor(PMSM)appeared in the 1950 s.The basic motor model is a wound rotor synchronous motor.It replaces the electromagnetic pole with permanent magnet,and maintains the magnetic field without external energy.At the same time,it also removes the winding and brush needed by electromagnetic excitation,so that the structure is more simplified.At present,it is widely used in aviation,ships,UAVs,electric vehicles,rolling,medical equipment and many other fields.With the rapid development of science and technology,industrial manufacturing requirements are also getting higher and higher.The traditional PMSM speed control strategy gradually cannot keep up with the higher performance requirements of speed control servo system in all walks of life.Therefore,the design of speed control servo system with better performance,higher control precision and stronger robustness for PMSM not only meets the needs of modern industrial manufacturing development,but also has considerable academic research value.Based on the field-oriented control of PMSM,this paper does the following work:In view of the shortcomings of the traditional PMSM speed regulation process,such as poor anti-disturbance ability of PI controller and excessive overshoot in the speed regulation process,this paper proposes an active disturbance rejection controller based on the idea and characteristics of active disturbance rejection control technology.To reduce the difficulty of parameter tuning of ADRC and optimize the structure,a linear ADRC is designed and applied to the speed loop.It is found that when the given speed frequency is high,the speed tracking speed will be reduced.To solve this problem,differential compensation is added to the tracking differential module.Simulation results show that the improved linear active disturbance rejection controller improves the speed tracking performance and has good disturbance rejection ability.To further improve the control ability of PMSM system and reduce the fluctuation of stator current,this paper designs a deadbeat current predictive controller applied to the current loop through the current predictive control technology.To solve the problem of extremely sensitive to parameter changes,the sliding mode observer is introduced into the controller,and the simulation verifies that the proposed method can effectively solve the problem of parameter mismatch.Then the dynamic characteristics of PMSM double closed-loop system using improved linear active disturbance rejection controller and deadbeat controller based on sliding mode observation are simulated and analyzed,and the correctness of the proposed method is verified.Finally,a PMSM speed control test platform is built on TI platform based on DSP.The comparison experiment between the PI control strategy of double closed-loop and the control strategy proposed in this paper shows that the designed PMSM double closedloop control system has the advantages of no overshoot in the speed control process,rapid dynamic response,strong anti-disturbance ability and good current control effect.This thesis has 54 figures,7 tables and 77 references.