Electromagnetic interference issues in the specification of AC and DC propulsion systems for light rail vehicles

Concerns about electromagnetic interference (EMI) issues are gaining more importance in the specification of propulsion equipment for light rail vehicles, as the number and complexity of switching power converters increases. EMI may adversely affect the operation of the signalling systems and the safety of the vehicle. This paper examines requirements associated with EMI and identifies the possible sources of EMI. It describes the on-board equipment and fixed installations responsible for EMI generation. Mitigation techniques are discussed