Research On Performance Of PMSM Control System For Belt Conveyor Based On EKF

As energy demand continues to grow,coal mine equipment requires energy conservation,environmental protection,and green efficiency.As one of the main transportation equipment for coal transportation in coal mines in our country,the key core of the belt conveyor is the driving system.The traditional driving method is"asynchronous motor+reducer",and its disadvantage is that the system energy consumption increases,noise and other faults are prone to occur,and the stability and reliability of the belt conveyor is difficult to ensure.The belt conveyor is directly driven by a permanent magnet synchronous motor(Permanent magnet synchronous motor,PMSM)with a low speed and a large torque,which has the advantages of energy saving and high efficiency,large starting torque,high reliability,and strong overload capacity.Therefore,the paper has conducted an in-depth exploration of the vector control aspect of the permanent magnet synchronous motor for the belt conveyor and the new sensorless control strategy.Based on theoretical derivation,a simulation model was constructed and experimental demonstration was carried out,and the control strategy of permanent magnet synchronous motor for belt conveyor was studied.Firstly,theoretical calculations related to the conveyor belt was carried out.According to the dynamic and static characteristics of the belt conveyor,this paper determined that the fractional derivative viscous viscosity model was used to establish the belt conveyor's dynamic model,and with the corresponding initial solution condition and matrix assignment,the dynamic equation of the whole machine was finally obtained.The motor structure and basic equations were introduced,and the mathematical model of PMSM was established based on the coordinate conversion method.The principle of SVPWM modulation technology was analyzed in detail,the vector control strategy of id=0 was determined for PMSM,and the electromechanical coupling relationship between belt conveyor and permanent magnet direct driving system(Permanent magnet direct drive system,PMDDS)was given.Based on the principle of Kalman filter algorithm,a detailed theoretical derivation of the extended Kalman filter(Extended Kalman filter,EKF)algorithm model was conducted.Aiming at the shortcomings of the traditional EKF algorithm,a multi-innovation idea was proposed,and the EKF algorithm was improved by adding two innovation values and Gaussian white noise.Finally,with the help of Matlab/Simulink simulation,the results show that the traditional EKF algorithm has prediction and correction functions,and the effectiveness of the two algorithms in the sensorless vector control of permanent magnet synchronous motors is verified.In terms of system rapidity,stability,output accuracy and robustness,the improved EKF algorithm has better control performance.By setting up the PMSM experiment platform to carry out the towing,no-load and load experiments of the motor respectively,the simulation and the experimental results are in good agreement with each other,which verifies the rationality and correctness of the simulation model established in the paper as well as the effectiveness of the improved EKF algorithm control strategy.Meanwhile,in view of the shortcomings of the existing technology,two PMSM protection devices are designed to solve the problems of motor damage caused by poor protection and of motor failing to work due to its inability to adjust the height.The results obtained in this paper are of great importance to the realization of high performance control of the belt conveyor's PMDDS.Meanwhile,they provide the corresponding technical support for practice in mining.Figure[83]table[6]reference[79]...