Hello everyone,
I’ve recently started exploring the field of power electronics, so I’m still getting familiar with many concepts. While I’ve managed to work through several challenges so far, there’s one issue I just can’t wrap my head around.
I’m working with a boost converter, intending to step up from 10V to 250V. I want to analyze the temperature behavior of the IGBT in this circuit. I’ve chosen a thermal model and implemented an initial cooling concept. However, I’ve noticed something: during the IGBT’s turn-on phase, the temperature decreases.
This seems wrong to me. Based on my setup, I expect—and do observe—significant conduction losses. Yet, when I try different input and output voltage levels, the temperature consistently drops during the turn-on phase. I just can’t figure out why.
As I mentioned, I’m still relatively new to this field and may be missing something fundamental. I’ve attached my circuit design, the thermal models I used, and a scope of the IGBT’s temperature and the losses.
I’d greatly appreciate any insights or guidance you can provide.
Best regards,
BOOST - PCM.plecs (11.2 KB)
IKQ120N120CS7_igbt.xml (6.3 KB)
E6D40065H.xml (3.0 KB)
Driton