Mine Hoist Control System Design Based On PLC

Mine hoist is important equipment in the mining industry,etc.Minerals and personnel transportation is inseparable from the hoist.Our traditional mine hoist mainly adopts relay-contactor control,and through motor rotor circuit series additional resistance to realize the start and speed.This control system is poor reliability,high failure rate,complex operation,power waste,the low efficiency,etc.Aim at the problems of traditional hoist,this design adopts the PLC control system,and with frequency converter realize the hoist speed control.Through to hoist system research,complete hoist control system design,select hardware device type and complete hardware system design,According to the hardware system requirements draw outside wiring diagram and write system programming.Through the PLC control inverter realize the hoist start,accelerate,constant speed,reduction,crawl and parking operation,and monitoring overload,speeding,hoist top,etc.Frequency control is through changing power frequency of the controlled object realize the AC motor Non-polar smooth speed in the wide range.Application of frequency converter improve mine hoist control system,which will become the inevitable trend of history.