Evaluation of dual mode locomotive braking parameters by the results of certification tests
The article overviews the main results of certification and approval braking tests of series ЭВ120 innovational freight mainline three-unit dual-mode electric locomotive which were carried out at the speedy testing ground. Performance specifications of the electric locomotive braking system are presented which were evaluated during stationary braking trials. The data obtained were used during train tests and final processing of the results. The preparatory part and realization of trial trips of operational breaking tests are described. The experiments were carried out considering the plan, profile and length of the railway section which had been given for trials at the stated velocity values before breaking of the locomotive. The experimental data obtained by the results of a series of test trips of the dual-mode electric locomotive were analyzed. The section average curve was defined, the breaking distance in relation to braking initial nominal speed and the area considering the track profile were calculated. The difference between empiric data and theoretically calculated values is shown graphically. The results of the trial trip to define the braking distance when using the electrodynamic brake are given. The conclusions are drawn about the prospect of implementation of dual-mode electric locomotives on railways using testing ground principles of control over transportation process.