Abstract
Large charging cranes are used to introduce hot metal into the BOF through the use induction motor drives for main and auxiliary hoist. These motor drives shall have the capability of dealing with bi-directional power flow due to the action of lifting (motoring) or lowering (regenerating) the load. The use of active rectifier increases the energy efficiency since the braking energy is not lost in heat. This work proposes the True Unit Power Factor converter with common DC bus and compare it to an existent solution. Theoretical analysis, simulation results and losses calculation show the advantages of the proposal in terms of power quality, energy efficiency and reliability. HIL results show the proper work of the developed control system.
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