The basic criteria of an optimality of an estimation the main properties of onboard electrical power supply systems (EPS) for perspective airplane with completely (or mainly) electrified equipment are offered, proved and accompanied by concrete examples. Examples of satisfying to these criteria one EPS channel possible structures are offered and described.
Keywords: сombined system of power supply of aircraft, structure synthesis, criteria of the optimality, completely electrified airplane.The innovational system of cooling of the automobile engine of internal combustion with proportional management on a difference of the given and real temperatures of cooling liquid is offered.
Keywords: system of cooling of the engine of internal combustion, width - pulse modulation, Increase of a voltage, proportional regulation, the electric motor of the fan of system of cooling.There was proposed a new management discipline of voltage and reactive power in electric traction network. There were considered theevaluation problems of regimes of traction power supply. In this paper performs the information accumulation system - SDTP NIIEFA– ENERGO and scheme of transfer of immediate information about train situation.
Keywords: voltage and reactive power; management discipline; the evaluation of regime; the accumulation and transfer of information.