Magnetic Field Modeling of a Single-Arm Pantograph a 25 kV Overhead Power Transmission System for Electric Railway Using a 3D Finite Element Method
Keywords:
finite element method, pantograph, electromagnetic fieldAbstract
The research presents a mathematical model of the magnetic field generated by a single upper-arm pantograph in a 25 kV overhead power transmission system for railways, expressed through second-order partial differential equations. Computer simulation results were obtained using the 3D finite element method implemented in the MATLAB program, providing graphical analyses of the magnetic field distribution around the pantograph in a steady state. The study simulated the magnetic field distribution in a single-arm upper pantograph structure and analyzed the magnetic field distribution of a pantograph with a graphite contact strip and brass as the contact strip material. The magnetic field values under the transmission line, particularly at the center, have the most significant impact on the pantograph, measuring 5.9840 and 5.7515, respectively. The overall pantograph averages 0.0559 and 0.0501, respectively. It is observed that the average and maximum values of the magnetic field for graphite contact strips have a higher average distribution than brass contact strips but remain similar. Therefore, graphite and brass materials exhibit properties suitable for substituting pantograph contact strips.
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