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Journals and Conferences
The general nature of electrical-supply network disturbances caused by arc-furnace operation is reviewed, including the guidelines adopted in several countries concerning disturbance-level estimation for single-and multifurnace installations. The meters available for the measurement of voltage flicker, including the international standard meter proposed by… (More)
Conditions in the slag bath of an electric smelting furnace are examined as are several existing models for such furnaces. A digital model that provides an improved simulation of the slag bath is described. The model is used to determine the electrical resistance between electrodes and can be used to examine the nature of the electromagnetic forces that… (More)
The calculation of metal circulations in a three-phase in-line electrode arc furnace to obtain the most likely locations of refractory wear as a function of the phasing of supply currents is discussed. The approach is analytic, and the result of calculations indicate the directions and the expected magnitudes of circulations (curl) in the furnace at various… (More)
The method used in Part I for the determination of Fourier coefficients of homogeneous functions is generalized here for nonhomogeneous functions. A number of examples from the field of power converter and inverter circuits are presented. Such special cases as harmonics of oscillations at the moments of valve's ignitions and extinctions are analyzed here.
A method of data acquisition and analysis is described that has been developed to assess in detail the performance of electric arc furnaces. The method has been implemented on a small single user minicomputer (a PDP 11/40) and on a large mainframe (an IBM 3033). The method was specifically developed in order to determine reliable statistical parameters that… (More)
Four approximate analytical methods have been studied for determining the current density and power loss distributions in multilayer sheet windings. A number of distributions were obtained using different approximations. The methods are described and their ranges of applicability discussed.
A new method of determining Fourier coefficients is described. The advantage of the method is the substitution of algebraic addition to replace the integration operation in Fourier analysis. The method is applicable to every periodic function that satisfies Dirichlet conditions. Several waveforms of converter voltages and currents are analyzed as examples… (More)
A theory of the circulation in a three-phase in-line electrode-arc furnace with rectangular cross section is derived. It is assumed that the depth of the furnace is infinite and that the length of the electrodes inside the melt is infinite. It isfurther assumed that the melt is electrically homogeneous. Assuming the exponential variation of the electrode… (More)
The problem of scaling a slag resistance electric smelting furnace from the pilot plant stage to a full size production unit is considered. Several of the existing scaling methods are discussed with a view to pointing out their limitations. It is shown that some are clearly inappropriate for the scaling process since they neglect significant factors that… (More)