Keywords
aluminum billets
three-phase inductor
computer modeling
electrothermal processes
active power transfer
How to Cite
Abstract
For the proposed design variant of a three-phase inductor of a device for induction heat treatment of cylindrical aluminum billets, which is used in the technology of production of conductive cores of power cables before pressing of wire rod, using the developed mathematical model of electrothermal processes, the process of active power transfer between phase sections and along the length of the billets, which occurs in the inductor due to inductive coupling between phase windings, has been investigated. It was established that the side phase sections of the inductor are characterized by the lack of balance between the active power consumed from the power supply network and the total heat dissipation in the phase section and the corresponding part of the aluminum billet, while this balance is fulfilled for the central phase section and the inductor as a whole. The distribution along the length and radius of the induction installation of the axial component of the electromagnetic field energy flux density vector was obtained, which confirms the presence of active power transfer between adjacent phase sections of the three-phase inductor and indicates its absence along the aluminum billets (on the secondary side of the system). It was established that the transfer of active power between the phase sections of the inductor has practically no effect on the heating of the aluminum billets. It was determined that the negative consequence of the transfer of active power between the phase sections of the three-phase inductor is the uneven load of the phases of the electrical network. A rational power supply scheme for a three-phase three-layer inductor from a three-phase industrial electrical network is proposed, which provides the maximum possible energy efficiency of the induction installation with minimal unevenness of the phases load of the electrical network. Ref. 9, fig. 6, table.
References
1. Zolotarev V.M., Shcherba M.A., Guryn A.G., Suprunovskaya N.Y., Chopov E.Yu., Obozny A.L. Electrotechnological complex for the production of cable systems for a voltage of up to 400 kV. K.: Pri format. 2017. 594 p. (Rus)
2. Zharkin A.F., Goryslavets Yu.M., Gluhenkyi O.I., Zolotaryov V.V., Bilyanin R.V. Modeling of electrothermal processes in the installation of induction heat treatment of aluminum ingots and determination of ways to increase its efficiency when pressing wire rod for power cables. Tekhnichna Electrodynamika. 2023. No 6. Pp. 81–91. (Ukr) DOI: https://doi.org/10.15407/techned2023/06/081
3. Nemkov V., Goldstein R. Design Principles for Induction Heating and Hardening in Handbook of Metallurgical Process Design. Marcel Dekker. 2004. Pp. 591–641.
4. Vishtak P.A., Kondratenko I.P., Rashchepkin A.P. Energy parameters of three-phase cylindrical inductors. Tekhnichna Elektrodynamika. 1996. No 6. Pp. 55–58. (Rus)
5. Shidlovsky A.K., Shcherba A.A., Zolotarev V.M., Podoltsev A.D., Kucheryavaya I.N. Cables with polymer insulation for ultra-high voltage. K.: Institute of Electrodynamics of the National Academy of Sciences of Ukraine. 2013. 550 p. (Rus)
6. Zharkin A.F., Goryslavets Yu.M., Gluhenkyi O.I., Bilyanin R.V. Multilayer inductors for induction heat treatment installation of aluminum castings when pressing rods for power cables. Pratsi Instytutu Elektrodynamiky Natsionalnoi Akaddemii Nauk Ukrainy. Kyiv. 2024. Issue 68. Pp. 13–21. (Ukr) DOI: https://doi.org/10.15407/publishing2024.68.013
7. Zimin L., Yeghiazaryan A. Features of induction heating for the deformation. Vestnik Samarskogo Gosudarstvennogo Tekhnicheskogo Universiteta. Seria Tekhnicheskie Nauki. 2015. No 3 (47). Pp. 128–134. (Rus)
8. Nemkov V.S., Demidovych V.B. Theory and calculation of induction heating devices. L.: Energoatomizdat, 1988. 271 p. (Rus)
9. Kuznetsov Е.V. Control of power redistribution in three-phase induction heaters. Vestnik KrasGAU. 2007. No 3. Pp. 203–236. (Rus)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright (c) 2025 A.F. Zharkin, Yu.M. Goryslavets, O.I. Gluhenky, R.V. Belyanin