Hello,
Looking at the graph you attached, let’s just say during each switch-on event the IGBT dissipates 1J. However, since your switching frequency is set to 1MHz, you will have 1MW of losses during a 1 second window of time. So I believe you need to greatly reduce your switching frequency to see more realistic switching losses. And anyway, an IGBT is likely not designed for such operation, but rather to be switched in the 10’s of KHz.
Kris