D.А. Istselemov - Head of Electric Drive Division of Engineering Department of CJSC NIPO; Post-graduate Student, Department of Electrical Engineering and Electromechanics, Perm National Research Polytechnical University. E-mail: novator@runbox.com E.V. Lyubimov - Ph.D. (Eng.), Professor, Department of Electrical Engineering and Electromechanics, Perm National Research Polytechnical University. E-mail: lis@pstu.ru D.A. Dadenkov - Senior Lecturer, Department of Microprocessor Automation Equipment, Perm National Research Polytechnical University. E-mail: dadenkov@mail.ru