Based on the modernization experience of multi-motor electric drives, unique technological lines and hoisting units. Implementation methodology for such projects was suggested. Their essence is in the combination of experimental studies in the normal operation of equipment and the physical simulation to obtain adequate mathematical models, as well as in the development of new systems in the normal and emergency modes. This technology is allowed to upgrade electric drives of unit continuous annealing and casting crane with hoisting capacity 420 tons of the JS "ArcelorMittal Temirtau". As a result, metal heat treatment increased velocity from 2,5 to 8 m/s with a minimum dynamic loads in the strip. The imbalance of the moments was decreased to 1-2,5% from 45% in static and 20% in dynamic for casting crane, and the crane productivity has doubled.
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