TY JOUR TI Analysis of traction electrical equipment failures in ES104 “Finist” DC high-speed trains KW ES104 electric train KW failure KW traction electrical equipment KW traction motor KW stator winding KW traction converter KW electric train control system KW traction controller KW brake regulator JO Proceedings of Petersburg Transport University AU Ivaschenko, V.O. AU Shelagurov, A.V. PY 2026 IS 23 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"