ELECTROMAGNETIC INTERFERENCE DETECTION SYSTEM FOR MASS TRANSIT VEHICLES WITH ELECTRIC PROPULSION

摘要

An electric power vehicle includes a propulsion system (14A, 14B) connected to a direct current (DC) source via a supply line. The propulsion system (14A, 14B) converts the DC supplied via the supply line to an AC electrical power to operate an AC motor (4A, 4B) at a desired level. An electromagnetic interference detection system for the vehicle includes an EMI processor (28) connected to a current transducer and the propulsion system (14A, 14B). The transducer detects AC signals appearing on the supply line and provides an output to the EMI processor (28). The EMI processor (28) determines the frequency, amplitude and duration of the detected AC signals and causes the propulsion system (14A, 14B) to adjust the AC electrical power supplied to the motor as a function thereof.