Peculiarities of overhead crane movement mechanism operation when powered by a basbar's trolley at action of higher current harmonics
DOI:
https://doi.org/10.15588/1607-6761-2022-2-2Keywords:
trolley, busbar, voltage losses, active losses, model, overhead crane, harmonicsAbstract
Purpose. Analysis and research of interconnected electromagnetic processes between electric drives of overhead crane moving mechanism and trolleys under conditions of higher current harmonics, taking into account design features, nonlinearity of magnetic and electrophysical properties of materials, proximity effects, surface and external surface effects.
Methodology. The research was carried out using methods of electromagnetic field theory, electrical circuit theory, mathematical physics, solving a system of first order differential equations, interpolation, approximation and regression analysis.
Findings. A simulating model of interrelated electromagnetic processes between electric drives of an overhead crane mechanism and current-conducting elements of the power supply system of an overhead crane has been developed. Investigations of electromagnetic processes between the electric drives of the overhead crane mechanisms and the trolleys have been carried out. The laws of voltage losses in the busbar's trolleys from the torque of the asynchronous electric drive have been established. This allowed to determine the maximum permissible distance of overhead crane movement to the feeding point of the busbar's trolley section, at which trouble-free operation is ensured as well as to determine the number of feeding points of the busbar's trolley sections and the distance between them. This will ensure the same level of voltage losses and active losses in the trolleys at the fundamental harmonic, and taking into account the higher harmonics of the load current.
Originality. .A simulating model of interrelated electromagnetic processes between electric drives of an overhead crane mechanism and current-conducting elements of the power supply system of an overhead crane has been developed. which allows to use integrated parameters of busbar trolleys according to field calculation taking into account skin effect, the shape and location of tires (trolleys) in the busbar, the distances between them and the number of phases of the busbar, depending on the peculiarities of the modes of operation of the electric drive and the distance of the bridge crane to the power point of busbar trolley sections
Practical value. Based on the theoretical research, recommendations to reduce voltage losses and active losses in the trolley from the action of higher harmonic loads to the level of voltage losses and active losses at the fundamental harmonic current have been developed.
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