Electrical Engineering & Electromechanics, ISSN 2074-272X (Print), ISSN 2309-3404 (Online), Editor-in-Chief: Prof. KLYMENKO B.V., e-mail: b.v.klymenko@gmail.com. Address of the Journal: 21, Frunze Street, National Technical University «Kharkiv Polytechnic Institute», Kharkiv, Ukraine, 61002, Tel. mobile +380 67 3594696, e-mail: a.m.grechko@gmail.com