The conventional dynamic switching performance
IGBT module test platform in Fig.2 uses the double-pulse
method. The platform is composed of high power P-i-N
diode DM, switch SM with anti-parallel diode, and a load
inductor Lload. The inductor Lload is energized to build the
desired current at a certain bus voltage in the first pulse.
When the second turn on pulse is applied to switch SM, the
switching waveforms, such as the gate driver signal, the
chip temperature, collector voltage and collector current of
the switch can be captured to evaluate power device
switching performance [13]. The TSEPs of the high power
diodes can also be measured and extracted with this singleended
chopper test platform because the dynamic switching
performance of the power diodes is intertwined with that of
the IGBTs.