M. F. Sadykov
Kazan State Power Engineering University (KSPEU).
Russian Federation

Marat F. Sadykov – Cand. of Physico-Mathematical Sciences, Associate Professor, Head of the Department of «Theoretical bases of electrical engineering» of Kazan State Power Engineering University (KSPEU). 

Kazan. 

A. V. Golenishchev-Kutuzov
Kazan State Power Engineering University (KSPEU).
Russian Federation

Alexandr V. Golenishchev-Kutuzov– Dr. of Physico-Mathematical Sciences, Professor, Head of the Department of «Industrial Electronics and Lighting Engineering» .

Kazan. 

N. K. Andreev
Kazan State Power Engineering University (KSPEU).
Russian Federation

Nikolay K. Andreev – Dr. of technical Sciences, Professor at the Department of «Instrumentation аnd Automatic Electric Drive». 

Kazan.