Pmsm Speed Regulation System Based On Active Disturbance Rejection Control

Permanent Magnet Synchronous Motor(PMSM)has a series of advantages such as high power density,small size,heat dissipation and so on.In recent years,PMSM has played an important role in the field of high precision and high speed servo.With the widely use of PMSM,the requirements for PMSM control system performance are also increasing,and the disturbance rejection performance of the control system is more challenging than before.In order to reduce the influence of load change on output speed of PMSM,in this paper,the control strategy of PMSM Based on ADRC is studied,and a Gopinath observer is used to compensate the ADRC.the PMSM vector control system with the speed loop and current loop using ADRC is analyzed.In the motor control system,the auto-disturbance-rejection control technology has better dynamic response performance and disturbance rejection performance than the traditional PI control technology.For the problems of ADRC control parameters tuning in this paper,the Parameters tuning of the ADRC with linear structure is accomplished by deriving the closed-loop characteristic function of the system,and the immune particle swarm optimization(PSO)algorithm is used to tune the parameters of the ADRC with nonlinear structure.In order to reduce the burden of the extended state observer and improve the disturbance rejection performance of the control system,the compensating ADRC is used in this paper,and the physical quantity of the compensation includes the moment of inertia and the load torque of the PMSM.For identification of the moment of inertia,three online identification methods are analyzed and compared:A least squares method with forgetting factor,a Model Reference Adaptive Strategy(MRAS)based on Popov's super stability,and a MRAS based on landau discrete iteration.The moment of inertia can be identified accurately by choosing reasonable gain.For torque observation,the commonly used on-line observation method is uses the reduced order observer to reconstruct the state quantity.Based on the characteristics of the proposed scheme,in this paper,the load torque is observed by using Gopinath observer.Through the stability analysis to select reasonable control parameters,the load torque can be accurately observed.For the special occasions that are not suitable for the installation of speed encoders,this paper estimate the speed of PMSM control system based on auto-disturbance rejection control by using MRAS.The speed estimate algorithm used in this paper is simple and easy to implement,and the performance of the system can meet the basic requirements.The experimental uses PESX-? power electronics and electric drive experimental platform,and TMS320F2812 was selected as the control core.The scheme of PMSM control by using PI control,ADRC control and compensation ADRC control are implemented.By comparing the experimental results with the simulation results,the effectiveness and superiority of the compensation ADRC scheme is verify,and the scheme can be applied to the actual.