A.G. Generalov – Head of Laboratory, JSC «Research Institute for Electromechanics» (Istra, Moscow region) E-mail: otd24@niiem.ru

E.V. Gadzhiev – Ph.D.(Eng.), Leading Research Scientist, JSC «Research Institute for Electromechanics» (Istra, Moscow region) E-mail: otd24@niiem.ru