INVESTIGATION OF ELECTRO-MECHANICAL OVERLOADS OF ELECTRIC LOCOMOTIVES TRACTION ENGINES IN CASE OF OPERATING CONDITIONS VIOLATION

Le résumé fourni par la source

In modern railway transport, there are cases of premature failure of traction motors of electric locomotives. The cause of these failures of electrical machines may be the influence of such factors as accelerated aging or breakdown of electrical insulating materials due to electrical overvoltages, the effects of mechanical overloads, violation of operating modes of locomotive equipment under increased loads or untimely switching in the electrical connection circuit of traction motors. Such factors lead to a decrease in the guaranteed service life of traction electric machines and, as a consequence, to their unscheduled repairs with corresponding financial costs. In some cases, locomotive equipment is beyond repair and requires complete replacement. Aim of research To study the influence of switching processes in the electrical connection circuit of traction motors on their possible failure in the event of violation of operating conditions with increased mechanical load and untimely switching of the method of their inclusion in the electrical circuit. Research methods For modeling and analysis of dynamic changes in the mechanical torque and electrical voltages of traction motors during a connection circuit switching, the simulation model has been developed in the MatLab Simulink software environment. Results The influence of changes in the transient electrical resistance of the contact gap of the switching equipment on the operation of the electric locomotive traction motor at a short-term moment of switching the connection circuit in case of violation of the operating conditions of the electric locomotive is considered. Recommendations were proposed to reduce the number of failures of traction motors.

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