Abstract

MARIN, Evelio Palomino et al. Influence of misalignment on functional dynamic parameters of a 250 kW direct current motor. Ingeniería Mecánica [online]. 2023, vol.26, n.3, pp. 8-16.  Epub Feb 10, 2023. ISSN 1815-5944.

An experimental investigation was carried out to determine the influence of misalignment on the functional dynamic parameters of a 250 kW DC motor in a steel plant. The objective was to determine the most sensitive online symptom parameters to the alignment condition of the 250 kW GH280 PK DC motor of a steel plant. To do this, it was necessary to obtain a mathematical model that described the behavior of certain functional dynamic parameters based on the motor misalignment. Parallel horizontal misalignment was caused in a motor and temperature, vibrations, and current consumption were measured. Through statistical analysis, a moderately strong correlation was found between misalignment and current consumption. A linear model relating both variables was obtained, which was satisfactorily validated. The most relevant result was that although the residual misalignment was tolerable, it caused significant changes in energy consumption, which translates into reductions of up to 13 % in energy consumption by periodically realigning the motor based on current consumption. The research concluded that the model obtained allowed estimating misalignment by measuring the current, being useful, even without exceeding tolerable limits, for planning corrective actions thus optimizing energy consumption.

Keywords : shaft misalignment; direct current motors; current consumption; statistical analysis; dynamic functional parameters; steel rolling mill.

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