基于PLC与变频器的带式输送机集控系统应用分析

Application of Centralized Control System of Belt Conveyor on PLC and Frequency Converter

由于煤炭运输过程的不确定性,带式输送机经常会出现重载启动、停止以及空载、轻载,操作人员排除设备故障等工作状态,造成运输设备的运行和操作人员的安全隐患。基于此,提出了一种基于PLC与变频器的井下带式输送机集控系统。系统以PLC为控制器,变频器软启动方式启动电机,可以动态调节电机及皮带机的负荷,并与上位机的组态软件相结合。采用了PROFIBUS现场总线技术组建系统的通信网络,上位机采用Wincc软件组态系统的监控界面,实时监控带式输送机的运行状态,实现了对皮带机及控制设备的实时保护。

Due to uncertainty in coal transportation,there occur some working modes in belt conveyor frequently,which would cause security risk for equipment and staff,including heavy load start,halt,no-load,light-load,and trouble shooting by staff.The paper proposes a centralized control system of the belt conveyors based on PLC and frequency converter.With the PLC as the controlling unit and the frequency converter starting motor by soft boot,the system could dynamically modulate the load on the motor and the belt conveyor.Combined with configuration software of host computer,PROFIBUS field bus technology is used to build communication network.With the monitoring interface of Wincc software configuration system,the host computer could monitor the operation of the belt conveyor in real time,which has realized the real time protection for the belt conveyor and controlling equipment.