Calculation of Voltage Transformer Parameters for Mathematical Model of Induction Channel Furnace

Abstract

Purpose. Nowadays, the upward continuous casting method is widely used copper wires and electric cables production. The electrothermal model of an induction channel furnace intended to solve the technological process modernizing issues, accounting specific production conditions, choosing the necessary electrical and energy characteristics of electrical equipment, as well as optimal operating modes. The working principle of the electrical unit of an induction furnace is similar to a single-phase power transformer operating in a short-circuited mode. Determining the parameters of this transformer is an important task requiring a specific calculation technique. Methodology. Fundamentals of electric circuit theory were applied. For further calculations, the equivalent circuit of transformer with secondary parameters transferred to the primary side was used. Results. Active resistance value of the primary winding at an operating temperature of 115 degrees Celsius is 0.005683 Ohms; inductive reactance of the primary winding is 0.008747 Ohms; active resistance of the secondary winding transferred to the primary winding at a temperature of 1080 degrees Celsius is 0.036 Ohms. Originality. The actual dimensions of the inductor for the induction channel furnace were used for the calculation. The inductor is the primary winding of the transformer, and the molten metal that fills the channel performs the role of the secondary winding. Since the secondary winding of the studied transformer, in fact, is a single short-circuited turn, then its inductance and inductive reactance can be neglected without losing accuracy. Practical value. Detailed calculation procedure for determining the single-phase furnace transformer parameters was proposed. Conclusions. This article explores the methodology for calculating the electrical parameters of the equivalent circuit of a specialized voltage transformer. These characteristics used for modeling the electrothermal processes in an induction channel furnace. Coming work for this research should focused on mathematical model enhancement and modeling of electrothermal processes in an induction channel furnace. References 12, figures 5.