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Burca A.,University of Oradea | Burca A.,1 Universitatii St | Stanciu B.,UAMT Oradea | Mich-Vancea C.,University of Oradea | Mich-Vancea C.,Postal address 1 Universitatii st
Journal of Electrical and Electronics Engineering

The context of sustainable economic development, with high efficiency and low consumption of materials and energy, respectively the need for automatic control, determines the intense use of inductive heating devices in hardening processes. This paper presents a simulation of an installation of superficial heating treatment (hardening), performed with the help of the commercial software ELTA ID, produced for inductive heating process. It highlights the links between different feeding electric parameters and constructive geometric parameters for maximizing electro-thermal effects that lead to a high quality heat treatment. The analysis of various material and electrical parameters during hardening is performed, in order to use these parameters in other environments for designing adjacent equipment. Source

Bogdan S.,UAMT Oradea | Stefan N.,University of Oradea | Stefan N.,1 Universita | Claudiu M.-V.,University of Oradea | Claudiu M.-V.,1 Universita
Journal of Electrical and Electronics Engineering

The paper presents the numerical modeling of the volume induction heating process for nonferromagnetic semi-products with rectangular (or cylindrical) cross-section. We analyze the couplet electromagnetic and thermal phenomena (variation of temperature, frequency, power consumption, etc.). Numerical modeling can offer precise information about several interdependent linear and non-linear parameters that can influence the transient and final thermal conditions of the semi-product, and how to optimize the design of induction heating systems in order to grow the efficiency of the heating process and to obtain the wanted temperature profile. Source

Leuca T.,University of Oradea | Mich-Vancea C.,University of Oradea | Nagy S.,University of Oradea | Tamas M.,Technical College Mihai Viteazul Oradea | Stanciu B.,UAMT Oradea
Journal of Electrical and Electronics Engineering

The paper present aspects of the numerical modeling of the electromagnetic phenomena coupled with the thermal ones (induction heating) when processing the cylindrical parts made up of nonferrous material, through electromagnetic induction, with the purpose to obtain a homogenous heating of the parts lengthwise in the shortest time. When modeling any induction heating process, it is critically important that the electromagnetic fields to be properly represented, in all the complexity that the system may involve. We start our numerical modeling from Maxwell's equations that describe the electromagnetic field and show the important quantity of eddy currents induced in the piece. By calculus these quantity result the electromagnetic losses, due to their transformation in thermal energy. In this way is possible to determining these losses and verifying the quantity of heat emerged in the piece. The purpose of the numerical modeling is to render solution to homogenize the intensity of the magnetic field induced according to the inductor length and wrapping step and frequency influence on the solution obtained. Source

Mich-Vancea C.,University of Oradea | Mich-Vancea C.,Postal address 1 Universitaii st | Leuca T.,University of Oradea | Leuca T.,Postal address 1 Universitaii st | And 5 more authors.
Journal of Electrical and Electronics Engineering

Further development and quality requirements imposed on production processes lead to determining new research to find optimal process parameters and configurations of the electromagnetic induction heating system. This work analyzes the process of mass heating for lengthy pieces by numerical modeling to obtain a uniform temperature by using multiple heating stages with different geometrical and electrical parameters. An important aspect treated in this paper is inductive heating stages alternating with phases of uniform temperature without heat. To achieve the intended purpose we used a commercial software for numerical modeling that has simulation facilities for the induction heating process in several stages. The results obtained by numerical modeling allow us to analyze several cases of induction heating, in a short time and to choose the best solution that provides a uniform heating of the work piece with low cost of material for devices and minimum power consumption. Source

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