Detection of failure of switch in electronic converter used in rail traction, uses control of switches to form closed circuit and monitoring of current flowing to detect switch failure

摘要

The failure detection operates by controlling (76) the switches to form a closed circuit connecting the terminals of the switch to be tested, then generating (78) a current in the closed circuit using a supply connected to the terminals of the converter. The values of a parameter representing current in the electric circuit are then analyzed (80) to deduce failure information.