A comparative analysis of the parameters of a rotating magnetic field inductor when using concentric and loop windings





rotating magnetic field inductor, stator winding versions, geometrical and electromagnetic parameters


Introduction. Three-phase inductors of a rotating magnetic field are used in grinders, separators and stirrers for the technological processing of bulk and liquid substances. This occurs in a cylindrical working chamber under the influence of ferromagnetic elements in the form of pieces of iron wire, which move together with the field. Problem. By analogy with three-phase induction motors, for the stator of inductors a concentric winding is adopted, which is a diametric single-layer winding. When moving from such motors to an inductor, its operating conditions have changed due to the significantly increased non-magnetic space inside the inductor compared to the motor clearances. The difference in the frontal parts of the phase windings has become essential for the electromagnetic parameters and the structure of the magnetic field in the inductor working chamber. Therefore, a loop shortened stator winding, which is symmetrical, can be considered as an alternative to a concentric diametric winding. Goal. The aim of the work is to compare the dimensional and electromagnetic parameters of a rotating magnetic field inductor in two versions of its three-phase winding: concentric single-layer diametrical and loop shortened two-layer. Methodology. Comparison of the windings is carried out through a detailed analysis of the geometrical parameters of their frontal parts, as well as through numerical-field calculations of the electromagnetic parameters of the inductor as a whole and the distribution of the magnetic field in its working chamber. Results. A significant difference in the geometrical parameters of the frontal parts of the two windings under inductor conditions was revealed. The loop version of the winding makes it possible to reduce the length of the winding conductor, its active resistance, as well as the reactance of its frontal dissipation. At the same time the asymmetry of the phase windings is excluded and an increase in the homogeneity of the magnetic field in the inductor working chamber is provided. Originality. The scientific novelty of the work lies in the development of a method of comparative analysis of the windings under the conditions of the rotating magnetic field inductor and in revealing the advantages of a loop shortened winding compared to the used concentric diametric winding. Practical value. The loop shortened stator winding recommended for the inductor will eliminate the asymmetry of its electromagnetic system. Thereby, the quality of its work in the technological processing of different substances is significantly increased due to ensuring the homogeneity of the magnetic field in the working chamber. At the same time, the copper conductor of the winding is still saved, and the efficiency of the inductor is also increased by reducing the power of electrical losses.

Author Biographies

V. I. Milykh, National Technical University «Kharkiv Polytechnic Institute», Ukraine

Doctor of Technical Science, Professor

M. G. Tymin, National Technical University «Kharkiv Polytechnic Institute», Ukraine

Postgraduate Student


Logvinenko D.D., Sheljakov O.P. Intensifikacija tehnologicheskih processov v apparatah s vihrevym sloem [Intensification of technological processes in apparatus with a vortex layer]. Kiev, Tehnika Publ., 1976. 144 p. (Rus).

Belounis A., Mehasni R., Ouil M., Feliachi M., El-Hadi Latreche M. Design with optimization of a magnetic separator for turbulent flowing liquid purifying applications. IEEE Transactions on Magnetics, 2015, vol. 51, no. 8, pp. 1-8. doi: https://doi.org/10.1109/tmag.2015.2424401.

Company GlobeCore. Vortex Layer Machine ABC-100. Available at: https://avs.globecore.ru/products/avs-100.html (accessed 30 September 2017). (Rus).

Ogonowski S., Wołosiewicz-Głąb M., Ogonowski Z., Foszcz D., Pawełczyk M. Comparison of wet and dry grinding in electromagnetic mill. Minerals, 2018, vol. 8, no. 4, p. 138. doi: https://doi.org/10.3390/min8040138.

Wolosiewicz-Glab M., Ogonowski S., Foszcz D., Gawenda T. Assessment of classification with variable air flow for inertial classifier in dry grinding circuit with electromagnetic mill using partition curves. Physicochemical Problems of Mineral Processing, 2018, vol. 54, no. 2, pp. 440-447. doi: http://dx.doi.org/10.5277/ppmp1867.

Całus D., Makarchuk O. Analysis of interaction of forces of working elements in electromagnetic mill. Przegląd Elektrotechniczny, 2019, no. 12, pp. 64-69. doi: https://doi.org/10.15199/48.2019.12.12.

Shvedchykova I., Melkonova I., Romanchenko J. Research of magnetic field distribution in the working area of disk separator, taking into account an influence of materials of permanent magnets. EUREKA: Physics and Engineering, 2020, vol. 1, pp. 87-95. doi: https://doi.org/10.21303/2461-4262.2020.001106.

Makarchuk O., Calus D., Moroz V. Mathematical model to calculate the trajectories of electromagnetic mill operating elements. Technical Electrodynamics, 2021, no. 2, pp. 26-34. doi: https://doi.org/10.15407/techned2021.02.026.

Kopylov I.P., Klokov B.K., Morozkin V.P., Tokarev B.F. Proektirovanie elektricheskih mashin [The design of electrical machines]. Moscow, Yurait Publ., 2011. 767 p. (Rus). Available at: https://em.fea.kpi.ua/images/doc_stud/distsiplini/oapem2/kopilov_proektirovanie_em_2011.pdf (accessed 10 May 2021).

Milykh V.I., Shilkova L.V. Characteristics of a cylindrical inductor of a rotating magnetic field for technological purposes when it is powered from the mains at a given voltage. Electrical Engineering & Electromechanics, 2020, no. 2, pp. 13-19. doi: https://doi.org/10.20998/2074-272x.2020.2.02.

Milykh V.I., Shilkova L.V. Control current method of the concentration of ferromagnetic elements in the working chamber of the technological inductor of magnetic field during its operation. Electrical Engineering & Electromechanics, 2020, no. 5, pp. 12-17. doi: https://doi.org/10.20998/2074-272x.2020.5.02.

Finite Element Method Magnetics: OldVersions. FEMM 4.2 11Oct2010 Self-Installing Executable. Available at: http://www.femm.info/wiki/OldVersions (accessed 15 May 2021).



How to Cite

Milykh, V. I., & Tymin, M. G. (2021). A comparative analysis of the parameters of a rotating magnetic field inductor when using concentric and loop windings. Electrical Engineering & Electromechanics, (4), 12–18. https://doi.org/10.20998/2074-272X.2021.4.02



Electrical Machines and Apparatus