Lobatiuk V. Optimization of work modes of electrotechnical complex consisting of a battery-driven vehicle with DC electric drive

The object of the study are processes in an electrotechnical complex of a vehicle in possible operating modes. The aim of the thesis is an increase in power reserve of a battery-driven vehicle by optimizing modes of it’s electrotechnical complex. Research methods: methods of electric drive theory, methods of theoretical mechanics and mathematical analysis, methods of aerodynamics, methods of optimization of dynamic systems, methods of automatic control theory, simulation modeling.Theoretical results: models of optimal motion of normally loaded and underloaded battery-driven vehicle with direct current traction motor of series excitation as for the criterion of minimum electric energy consumption of the storage battery were synthesized for the first time; a synthesis of law and optimal motion control system for a battery-driven vehicle driving with variable speed caused by road signs and influence from other vehicles in a city traffic was made for the first time; decomposition of a problem of optimization of a battery-driven vehicle whose traction system also has an internal combustion engine which moves it to a class of hybrids was made; a computational method for identifying models of optimal motion of a battery-driven vehicle with idle drive system from stop to stop for a given time was proposed and its modification was performed.Practical results: methods and system of optimal control of a battery-driven vehicle driving either without barriers on a horizontal section, uphill and downhill or in a city traffic allow to produce such current in the anchor of direct current traction motor of series excitation at any vehicle speed that will minimize electric energy consumption of the storage battery. Extension of electrical traction unit of a battery-driven vehicle with internal combustion engine allowed to provide driving modes which will minimize electric energy and fuel consumption.Proposed mathematical models can be easily adapted to trolleybuses. Most of results obtained within this work were implemented in Vinnytsya National Technical University by including them into study courses dedicated to electrical equipment of cars, methods of identification and optimization of electrotechnical complexes and organization of scientific researches, some of them were implemented by using in state-funded research topic “Informational technology of processing parameters of state-time models of data of dynamic multiply connected spatially-distributed systems.”, state registration number № 0115U00112, and also passed for implementation in “ATP Slobodyanuk” LLC and “Vinnytsya Transport Company” utility company.Scope of use - electrical energy industry.