Table of Contents
International Journal of Vehicular Technology
Volume 2009, Article ID 505246, 10 pages
Research Article

Calculation of Rail Internal Impedance by Using Finite Elements Methods and Complex Magnetic Permeability

Department of Energy, Politecnico di Milano, 20156 Milano, Italy

Received 19 May 2009; Revised 5 October 2009; Accepted 20 November 2009

Academic Editor: R. M. A. P. (Nandana) Rajatheva

Copyright © 2009 Alberto Dolara and Sonia Leva. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The internal parameter of UNI 60 rail is calculated by using finite elements methods. Steel's characterizations by its normal magnetization curve and by complex magnetic permeability are here considered and included into the proposed FEM models. Rail's resistance and internal inductance in function of current and frequency are calculated using both FEM and analytical models. The results obtained at the frequency of 50 Hz are compared with few measurements available, and then they are extended to other frequencies.