Research And Development Of The Experimental Platform For Permanent Magnet Direct-connected Belt Conveyor System

Compared with traditional belt conveyors,permanent magnet direct-coupled belt conveyors have the advantages of simple structure,large starting torque,and high work efficiency,and are widely used in the coal transportation industry.However,because the permanent magnet direct-coupled belt conveyor always maintains a constant speed during operation,the speed of the conveyor belt is not adjusted,and the operation process consumes a lot of energy.Therefore,the frequency conversion energy-saving speed regulation technology of permanent magnet direct-connected belt conveyor has become a hot research topic.Due to the lack of a priori data of the permanent magnet direct-connected belt conveyor,the research on its operating characteristics is not deep enough,especially the lack of operating characteristic data under typical working conditions,and the lack of basis for speed regulation,that is,the relationship between coal volume and belt speed and energy consumption It is impossible to achieve load-dependent speed regulation to reduce energy consumption.Considering that the relevant technology research on the actual coal mine underground belt conveyor not only affects production,but also has high economic costs,and there are certain safety risks.Therefore,this thesis designs a set of experimental platform for permanent magnet direct-coupled belt conveyor system for the study of the characteristics of permanent magnet direct-coupled belt conveyor system.The main research contents are as follows:The functional requirements of the experimental platform of the permanent magnet direct-connected belt system are analyzed,and the specific parameters of the experimental platform are determined.Preliminarily draw up the overall design plan of the experimental platform,and construct the overall framework of the experimental platform.According to the main technical parameters and overall framework of the experimental platform,the three main systems of the experimental platform-variable frequency drive system,belt conveyor system,and simulated load system are designed and calculated,and the final construction of the experimental platform is completed.The design of the intelligent controller of the experimental platform of the permanent magnet direct-connected belt conveyor system based on fuzzy PID.The experimental platform is a complex system with nonlinear time-varying lag.It is impossible to establish an accurate mathematical model,and there are sudden load changes and continuous load changes during operation,resulting in unstable system control performance.Fuzzy control is combined with traditional PID control.Compound control algorithm,design an experimental platform controller based on fuzzy PID to optimize the control system,and establish a simulation model,and compare and analyze the simulation with traditional PID control.The results show that fuzzy PID control has better stability,faster speed response and better robustness.Carry out the control system design of the experimental platform of the permanent magnet direct-connected belt conveyor system.Design the hardware and software of the control system of the experimental platform,establish communication with the PLC through the Kingview upper computer software,carry out program design such as startup control,energy-saving speed regulation control,and comprehensive protection to realize the experimental platform of the permanent magnet direct-connected belt conveyor system Intelligent control,and real-time monitoring of the operating status and related parameters of the experimental platform.In the experimental platform system built for experimental verification,start-stop,comprehensive protection experimental test,and frequency conversion energy-saving speed regulation experiment research.Based on the real-time data obtained from the experiment,the energy-saving effect analysis of the frequency conversion energy-saving speed regulation technology is carried out.The results show that the frequency conversion energy-saving speed regulation operation can reduce the operating energy consumption of the permanent magnet direct-connected belt conveyor system experimental platform by 17.80%.