Authors: A. Kislov, O. Talipov, K. Karmenov, S. Toraigirov

Abstract: Induction smelting crucible furnaces have the advantage of optimal management of the process, regulation of the capacity and have high technical indices. The research of electrical and energetic correlation of induction smelting crucible furnaces is necessary in order to analyze the work and elucidate the optimal condition of exploitation, to work out the methods of projection and determine the optimal constructions of magnet wires. The authors worked out the methods of calculating the energy of electromagnetic field according to the sections of the space of the induction system, to the selection and installation of magnet wires in order to meet the technological requirements in the best way and to achieve high energetic and exploitation indices when building the induction crucible furnaces. The work represents the influence and interrelation of the inductor and the charge with the magnet wire depending on geometrical correlation of the induction system.

116

Authors: I. Nikulin, A. Perminov

Abstract: In this paper mathematical model is developed for the study of metal melt flows general regularities in non-uniform alternating magnetic field, in which cylindrical area filed with paramagnetic conducting melt is considered, the symmetry axis is directed vertically. The model include the equations describing spatial magnetic field distribution, the equations for induced currents, the equation of heat energy transfer that includes movement of media and volume heat sources, the equation of melt convection in Boussinesq’s approximation including of Lorentz force action to the melt. The boundary conditions for the melt velocities, magnetic fields and heat fluxes are described detail. The governing equations and boundary conditions are given in dimensionless form. The results of numerical experiments with different magnetic Reynolds number are given.

242

Authors: Victor Timofeev, Maksim Khatsayuk, Mikhail Eremin

Abstract: The present article describes the analysis of electromagnetic field in an induction MHD-stirrer for liquid metals with the account of transverse di-mensions of the inductor and bath with melt. The parameters of the equivalent circuit of a MHD-stirrer and its electromagnetic characteristics have been defined.

66

Authors: Bronius Karaliunas, Edvardas Matkevicius, Brone Mitkiene

Abstract: The submitted list of scientific publications and literature indicate, that so far there have never been comprehensively analysed the braking modes of the Linear Induction Motor (LIM) with a short secondary part. The article deals with the theoretical simulation model of such a LIM, containing even, odd or fractional number of the active (excitation) zones. The spectral analysis method is used to calculate the spectral characteristics of the motor braking. After having applied, Fourier and Laplace integral transformations for the non – periodic volumetric density functions of the braking current, there have been derived the analytical expressions of the continuous amplitude spectra. These obtained expressions successfully meet/harmonize the analysis of spectral characteristics of the primary and secondary magnetic field.

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