Electromagnetic Interference Characteristics of Advanced Propulsion Systems for Urban Rail Vehicles

摘要

Early research and development efforts by the Urban Mass Transportation Administration (UMTA) in the area of urban rail transit were long range programs attempting to apply advanced technology to problems plaguing U.S. transit properties. The programs themselves are known collectively as Subsystem Technology Applications to Rail Systems (STARS). This study of electromagnetic interference (EMI) characteristics of advanced propulsion systems, directed toward resolving total systems problems with EMI, is a part of a larger STARS program. This report describes various track circuit signalling systems and identifies different modes of possible EMI from onboard electrical power subsystems for urban rail vehicles. Chopper controlled ac drives and inverter controlled ac drives are analyzed and characterized as electromagnetic noise sources. Waveforms of currents through various reactors in the drive circuitry are presented. Finally, eleven different chopper circuit configurations are analyzed in detail in Appendix A and the characteristics of multiple-car trains are reviewed in Appendix B.