NOUFERROUS METALLURGICAL EQUIPMENT

Aiming at the problem that full-automatic bridge crane controlled by frequency converter and programmable logic controller (PLC) swings due to inertia and wind load during handling, this paper puts forward a multi-speed anti-swing and precise positioning control method for bridge crane. By studying the actual working condition, automatic positioning, anti-swing algorithm and control program development of crane, a mathematical model of multi-speed curve is established, and a PLC anti-swing control program is developed. The control program is embedded in the main control program of crane, and the crane is controlled by frequency converter when positioning and moving. The control method has been tested and applied in the grab crane of iron and steel metallurgy cyclone pool. The positioning accuracy and anti-swing effect meet the requirements of the full-automatic bridge crane for slag grabbing in cyclone pool, which improves the working efficiency of the crane and reduces the safety risk.