Evaluation of the efficiency of a 4q-S converter of an alternating current electric locomotive of the "O’Z-ELR" series using a computer simulation model

Investigation of electromagnetic processes of 4q-s converters of an electric locomotive of the "O’Z-ELR" series with an assessment of the efficiency of the converter at different frequencies of the timing signal and with increasing traction load power. To study the electromagnetic processes of 4q-s converters of an electric locomotive of the O’Z-ELR series, a simulation model of a traction electric drive of an AC electric locomotive with input 4q-s converters was created in the Matlab Simulink package. In the course of modeling electromagnetic processes in 4q-s converters of an electric locomotive of the "O’Z-ELR" series, the losses in power semiconductor devices were calculated in accordance with the formulas and using the traction, winding current oscillograms obtained when modeling electromagnetic processes with increasing traction load power from 0.25 to 1.25.