IMPROVED DESIGN TECHNIQUE FOR CONDUCTING PARTS OF ELECTROMAGNETIC CONTACTORS

Ivan P. Ivanov, Dmitriy V. Samuilov, Gennadiy P. Svintsov, Alexey A. Fedimirov, Evgeniy V. Shpakov

DOI: 10.47026/1810-1909-2021-3-73-82

Key words

electromagnetic contactor, conductive elements, design, improved technique, temperature distribution constant, heating temperature.

Abstract

The existing design techniques for the conductive parts of the main circuit of electromagnetic contactors are based on two assumptions: the infinite length of the conductor and the absence of its heating, which is determined by the contact resistance. This can lead to significant errors in the design of conductors of finite length, primarily in the design of conductive parts with contact bridges, which contain almost all modern electromagnetic contactors. For a more efficient determination of the geometric parameters of the conductive parts, it is proposed to use an improved technique without the above assumptions. The technique uses a model of a contact formed by overlapping the ends of two rectangular conductors and containing a contact piece as a design one. A key feature of the technique is the use in the calculations of the temperature distribution constant along the length of the conductor, introduced for the first time, which determines the nature of the change in its heating temperature. The main stages of calculation and an example of determining the geometric dimensions of the conductive parts by this method for ABB contactors for different rated currents are given.

References

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Information about the authors

Ivan P. Ivanov – Candidate of Technical Sciences, Chief Researcher, JSC «VNIIR Progress», Russia, Cheboksary (ipivanov@vniir.ru).

Dmitriy V. Samuilov – Post-Graduate Student of Electric and Electronic Apparatus Department, Chuvash State University, Russia, Cheboksary (dsamuilov@vniir.ru).

Gennadiy P. Svintsov – Doctor of Technical Sciences, Professor of Electric and Electronic Apparatus Department, Chuvash State University, Russia, Cheboksary (eea_chuvsu@mail.ru).

Alexey A. Fedimirov – Post-Graduate Student of the Department of Electromechanics, Electrical and Electronic Apparatuses, National Research University «Moscow Power Engineering Institute», Russia, Moscow (afedimirov@vniir.ru).

Evgeniy V. Shpakov – Design Engineer, JSC «VNIIR-Progress», Russia, Cheboksary (evshpakov@vniir.ru).

For citations

Ivanov I.P., Samuilov D.V., Svintsov G.P., Fedimirov A.A., Shpakov E.V. IMPROVED DESIGN TECHNIQUE FOR CONDUCTING PARTS OF ELECTROMAGNETIC CONTACTORS. Vestnik Chuvashskogo universiteta, 2021, no. 3, pp. 73–82. DOI: 10.47026/1810-1909-2021-3-73-82 (in Russian).

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