TY CONF TI Scientific and Methodological Approach to Teaching Calculations of Electrical Equipment in an Engineering University KW electrical equipment KW generator KW transformer KW equivalent circuit KW sinusoidal function KW real impulse KW exponential impulse JO VII Betancourt International Engineering Forum AU Chernysheva, Y.V. AU Gorskiy, A.. PY 2026 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"