New Interpretation of Process of Formation of Tractive Effort of the Locomotive

Study of the influence of electric transmission parameters on the efficiency of freight rolling stock of direct current

“…The difference of currents in parallel-connected motors of sequential excitation is expressed through 1 …”

“…At present, most research aimed at enhancing effectiveness of rolling stock operation are conducted in the following main areas: improvement of efficiency of energy conversion and power transmission [1], improvement of onboard control systems, enhancement of conditions for implementation of traction and braking efforts of rolling stock [2]. One of the main factors for increasing the quality of traction of wheels and rails is the development of more advanced structures of crew pieces of rolling stock [3][4][5].…”

“…During manufacturing and operation of these elements, the difference in their characteristics is sure to occur. To eliminate the harmful effect of this difference, a number of systems, such as the system of axial regulation of traction effort [1], dynamic redistribution of loadings from wheelsets on rails [9], alignment of currents by parallel branches of the power circuit [10], were developed and implemented, the design of bearing elements of rolling stock [11] was improved, interaction of the wheel rolling surface with rails and brake pads [12] was improved and so on. However, these developments have not enabled the full use of the traction mass of locomotives and maximal efficiency of their operation under all modes of operation [13,14].…”