Calculation of the Electrical Parameters of Direct Resistance Heating of Rectangular Workpieces
An approximate solution for the problem of the distribution of the electric field strength and of the alternating current density across the cross section of a rectangular metal workpiece and its resistance is presented. This problem is especially important in the case of direct resistance heating of workpieces for estimating their resistance and determining its dependence on the temperature and on the geometrical parameters. The results of the analytical solution are given for aluminium and copper products and are compared with the results of numerical calculations.