issue 5-8

20220508-full
Issue 5-8, 2022

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 57. No 5-8/2022
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20220508-full

C O N T E N T S

Special issue (second volume): scientific papers from 14-th International conference on Electron Beam Technologies ...  read more

20220508-01
Laser heated cathodes for electron beam welding applications
Colin Ribton, Paul Plumb

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Electron guns for processing applications typically use a thermionic cathode as the source of electrons, where the cathode is a resistively heated refractory metal ribbon. In order to keep the heat input to the gun reasonably ...  read more

20220508-02
Demagnetization of thick section steels for electron beam welding
Colin Ribton

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High power electron beam welding can be applied to structures such as pressure vessels with wall thicknesses of up to 200 mm. Such applications often make use of steels that exhibit ferromagnetic properties. If the work pieces ...  read more

20220508-03
Optimization of electron beam welding of Ti-6Al-4V thin plates
Lilyana S. Koleva, Asya Lozeva, Elena G. Koleva

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In this paper the electron beam welding of Ti–6Al–4V thin plates is simulated by implementation of a moving linear heat source model. The simulation results are used for estimation of regression models for the dependencies ...  read more

20220508-04
Simulation of electron beam welding of Inconel 718 thin plates
Lilyana S. Koleva, Natalia Hristova, Elena G. Koleva

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In this paper the simulation of electron beam welding of Inconel 718 thin plates by a moving linear heat source is considered. Regression models for the molten pool geometry characteristics, depending on the electron beam ...  read more

20220508-05
Robust model-based multicriterial optimization strategies for electron beam welding of Steel 45
Elena G. Koleva, Lilyana S. Koleva

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In this paper an experimental study of the geometrical characteristics of the cross-sections of the thermally affected areas obtained by electron beam welding joints of carbon steel grade 45 is made. The thermally affected ...  read more

20210508-full
Issue 5-8, 2021

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 56. No 5-8/2021
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20210304-full

C O N T E N T S

ELECTRICAL ENGINEERING
Dejan S. Stevanovic, Miona V. Andrejevic Stosovic, Milan M. Savic
 ...  read more

20210508-02
Advanced computation of the field apparent resistivity of the soil for driven-rod electrodes
Slavko Vujević, Tonći Modrić, Ivan Krolo

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In this paper, analytical formulas for the computation of the field apparent resistivity of the soil for driven-rod electrodes are presented. General four driven-rod electrode array configuration and its special cases: general ...  read more

20210508-01
Power monitoring system for current up to 20A
Dejan S. Stevanovic, Miona V. Andrejevic Stosovic, Milan M. Savic

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In this paper we proposed a system for AC current monitoring in home appliances, up to 20A. System also measures voltage, line frequency, power factor, active power, and total imported active energy. The accuracy of the realized ...  read more

20210508-03
Different AC magnetic field shielding procedures
Teodora G. Gavrilov, Karolina K. Kasas-Lazetic, Miroslav A. Prsa

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In this paper, the analysis of magnetic field distribution of shielded copper conductor with the current of 100 A RMS is presented. The impact of various shielding materials (copper, aluminium and zinc-coated iron tin) and ...  read more