Influence of pulse excitation on electromechanical indicators of a linear pulse converter of electrodynamic type

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Authors:

V. F. Bolyukh, Dr. Sc. (Tech.), Prof., Professor of the Department of General Electrical Engineering, orcid.org/0000-0001-9115-7828, National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Yu. V. Kashanskyi, Postgraduate Student of the Department of General Electrical Engineering, orcid.org/0000-0002-1532-9613, National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

I. S. Shchukin, Cand. Sc. (Tech.), Assoc. Prof., Associate Professor of the Department of Electric machines, orcid.org/0000-0001-7982-8633, National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2020, (3): 73-80

https://doi.org/10.33271/nvngu/2020-3/073

 

повний текст / full article

 

Abstract:

Purpose. Investigation of the effect of pulsed excitation of the electronic circuit-controlled inductor and armature windings, powered with the capacitive energy storage (CES) source, on the speed and power indicators of a linear pulse electrodynamic converter (LPEC).

Methodology. On the basis of the developed numerical model, the influence of pulsed excitation — vibrationally damped, half-wave, aperiodic, and aperiodic with recharge, on the characteristics and performance of LPEC is studied. The mathematical model of the LPEC, using the lumped parameters of the stationary winding of the inductor and the movable winding of the armature, takes into account the interconnected electromagnetic, mechanical and thermal processes, presenting their solutions in a recursive form.

Findings. It was found that the pulse excitation of the LPEC insignificantly affects the maximum speed, the pulse of electrodynamic forces (EDF) and the temperature rise of the inductor winding. The highest values of the maximum speed and impulse of an EDF arise upon excitation by a vibrationally damped current pulse, while the smallest ones – upon excitation by an aperiodic pulse. The LPEC excitation by an aperiodic current pulse with recharge allows the use of a reduced charge voltage for rechargeable CES. With a decrease in this voltage and with conservation of the energy of the CES, the amplitude of the EDF decreases by 31.5 %, but due to the delay of electromagnetic processes, the pulse of the EDF increases by 3 %, and the efficiency – by 8.2 %.

Originality. A comprehensive criterion for the LPEC efficiency was introduced, which takes into account the amplitude of the excitation current, the mass of the windings, the temperature of the inductor winding, the magnitude of the EDF pulse, the efficiency, and the maximum speed for a given reliability coefficient. Using this criterion, we found that in terms of power and speed indicators, the most efficient is a converter excited by an aperiodic current pulse with recharge, and the quality of work is a converter excited by an aperiodic pulse.

Practical value. The influence of the width of the copper bus and the corresponding axial heights of the windings of the inductor and the armature on the speed and power performance of the LPEC using vibration-damping, half-wave, aperiodic and aperiodic with recharge current pulses is established.

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ISSN (print) 2071-2227,
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