MODELLING OF ELECTROMECHANICAL CONVERTERS OF TRACTION USED ON ELECTRIC LOCOMOTIVES
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2010, Vol 34, Issue 34
Abstract
The paper begins by presenting basic electrical diagrams of the main types of electric locomotives (with chopper and DC motors or with rectifiers and DC motors or with VVVF and induction motors IM or with self-controlled synchronous motors SCSM) powered from DC contact line or from AC contact line. To obtain the movement diagrams, in the paper they are established the equations of useful movement and it is built the structural diagram corresponding to a locomotive with „z” traction identical motors. The paper aims to build, on the new concepts basis, structural models (easily reconfigurable in the Simulink models) for all types on electromechanical converters, of traction, that are today installed on the electric locomotives. For modelling is proposed the original idea of fictitious split of any traction electric motors into an „electromagnetic part” and into a „mechanical part”. Construction differences, functional differences and mathematical differences of the equations that describing the various types of electromechanical converters are given only by their electromagnetic parts. Starting from that idea, the paper presents the mathematical equations and structural diagrams for all electromechanical converters of traction used on the electric locomotives. For electromagnetic part of the DC motors and the induction motors, equations and structural diagrams take into account the real iron core magnetization curve. Only for modeling SM is adopted the Park theory (with unsaturated iron core). As a validation of the models, in the last part of the paper are summarized the Simulink model of an induction motor, the Simulink model for useful movement and, for concrete data, the running diagrams of ETR 500 high speed train obtained by numerical simulation.
Authors and Affiliations
Doru Adrian NICOLA, Daniel Cristian CISMARU
Keywords
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