Otimização elétrica de uma ponte rolante utilizando controle vetorial com enfraquecimento de campo

Abstract

This study shows a steady state hoist crane electrical optimization application using a vector control frequency converter. Field weakening methodology was used because of oversizing normally used in cranes application. The methodology was confirmed by simulation with a generic machine operating in a large range of load and magnetization current. A typical application was chosen, in an auxiliary hoist at crane 51PR12 at Slab Conditioning Area on ArcelorMittal Tubarão. This crane is used to move metallic scrap bucket, resulted of steel slab scarfing process. Practical results were obtained confirming the methodology. Defined the optimal magnetization current reference to drive, in energy optimization point of view, based on operational work cycle and calculated the gain obtained. The operational work cycle consists to left an empty bucket at collecting position and takes it out when it is full. Isn’t possible to change dynamically this current reference (is a configuration parameter of drive), so was defined the optimal reference based calculation with this two loads and optimal magnetization current, merging this two characteristic movements.