OPTIMIZATION OF THE CONVERTER CHARACTERISTICS IN BRAKING TRANSITION MODES OF TRACTION ENGINE

Abstract

Described conditions of converter optimization for DC engine braking modes. Braking minimizes the level of current ripple when using various methods of current regulation. Solving problems of efficient use of a DC traction engine and create safe modes of operation by ensuring optimal mode. The introduction of additional elements in the scheme allows to reduce the rate of attenuation of the current in the brake coils. A significant advantage of the proposed circuit modernization is the introduction of diodes in the circuit, which will allow the use of self-excitation of the electric motor for electrical braking. The proposed solution simplifies the technical implementation and reduces costs due to the lack of an additional independent power source for the brake coils. A significant factor in increasing the profitability of electric transport in general may be the replacement of an existing traction electric drive (TEP) with their more modern types. Simulation models have been developed to allow the study of electromechanical processes in a serial DC engine. Introduction to the circuit of a pulsed regulator diode, which shunts the excitation winding, reduces the rate of attenuation of the current in this winding. The proposed modernization of the circuit is to introduce into the circuit the diodes, an energy storage, which allows the use of brake modes for self-excitation of the motor and to avoid the use of additional independent sources of current.