Miroshnyk D. Perfection of control system for increasing energy effectiveness of traction frequency-controlled asynchronous electric drive with supply from charge battery

Object of research are energy, electromechanical and electromagnetic processes in the traction asynchronous electric drive with supply from the charge battery. The goal - increase of energy efficiency of the traction frequency asynchronous electric drive with supply from the charge battery by improvement the frequency converter scheme, a formation method supply voltage of the motor, and also the system structure of vector control. Methods: at synthesis of systems voltage control in a DC link of the frequency converter, current and voltage of the charge battery, are used method of the combined control on disturbing influence, a graphic-analytical method of differential equations calculation and a method of consecutive correction; at formation mathematical model of system "the traction asynchronous electric drive - the storage battery" and calculation of parameters of the step-up converter are used methods of linear electric circuits calculation in aggregate with a method of switching functions; and methods of mathematical and physical modeling are used for research of the proposed solutions. Novelty: for the first time it is offered the combined method of supply voltage asynchronous motor formation with using the pulse-width modulation, that allows to reduce energy losses of the electric drive in shunting operating modes; it is improved the structure of vector control system with regulation of the moment asynchronous motor, differing by insertion addition control contours of charge battery current and voltage, and frequency converter voltage in DC link with error compensation channel that allows to increase system speed of operation and to reduce the charge battery energy losses. Results of researches can be used by the developers and the research organizations which are engaged in design of mining locomotives, electric cars, accumulator vehicles on the basis of the traction electric drive with the alternating current motor, and also in educational process. The application branch is electrical engeneering.