Power cycling close to 50- Hz load, low temperature swings combined with an adjustable part of switching losses

摘要

Power cycling tests with low temperature swings are interesting for a lot of users, because often many of them occur in the application. However, most manufacturers and lifetime models cannot make a statement about the range in which a temperature swing leads to permanent damage (plastic strain) or only to reversible deformation (elastic strain). In this work, a power cycling test with superimposed switching losses is intended to investigate the area where both mechanisms have an impact on the lifetime and which dependencies can be detected. Furthermore, a simulation will be performed to detect the influence of plastic and elastic strain in the bond interconnection regarding lifetime.