| Abstract |
Since 1997, most of the new traction converters designed by ALSTOM are based on high voltage-high
power IGBT module technology. The first application of high power hybrid module started in France
on tramway application in 1995. From 1994, many laboratories focused on reliability and identified
failure modes and failure indicators due to thermal cycling generated by the urban traction working
conditions. The present paper will describe and discuss, concept and methodology, developed in an
experimental program on a sub-urban mass transit train, in order to identify real stress and correlate
with standard accelerated tests results. Moreover, by developing measurement methods of parameters
identified as failure indicators in laboratory works, during standard reliability test easily applicable in
railway workshop, a predictive maintenance approach can be developed. |
