Minimization of Quasi-Static Electromagnetic Interference from Light Rail

Light rail transit systems are commonly routed through or near high density areas such as university and medical campuses since these types of destinations support high ridership numbers. Campuses that are involved in research pose a special challenge to designers because some of their equipment has extremely low tolerances to magnetic fluctuations; Nuclear Magnetic Resonance (NMR) spectrometers and electron microscopes have limits of less than several milliGauss. Hospitals can pose similar challenges with Magnetic Resonance Imaging (MRI) equipment. The light rail vehicles on a light rail transit system produce strong direct current (DC) magnetic fields that cover a wide area. This paper studies the basic mechanisms of the quasi-static electromagnetic interference (EMI) produced by a light rail transit system including some of the possible techniques used to mitigate this interference. Test data and modeling from a number of transit systems provides insight on a standardized approach to mitigation. By understanding these mechanisms and mitigation techniques, a light rail transit system can be designed much closer to existing sensitive equipment than typically possible.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 8p
  • Monograph Title: Rail Conference 2009 Proceedings

Subject/Index Terms

Filing Info

  • Accession Number: 01157799
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 2 2010 11:50AM