Negative power at Tj sweep 0°C...175°C at DPT

nugzari

Hello, I don't understand why I get a 0 line shifted downwards at power. This also influences my energy calculat.

But this cannot be the truth, that with increasing Tj the energy loss decreases.

But if I mathematically shift the negative zero line up to 0KW, I get different energy.

and if I simply calculate Vmid*Ids, the power is not shifted downwards and I also get plausible energy losses.

My question now, which of these three methods is correct? and more accurate. why is the zero characteristic curve in the model equation for power shifted to the negative range where no current flows?
I assume that the calculation of I*U is not as accurate as I take this long equation from Model. Is there an error in the model equation for power or am I making a mistake?

this is the power formula of double pulse test model.

V(N005)*Ix(U1:V+)+V(UDS)*Ix(U1:Mid)+V(N013)*Ix(U1:V-)+V(VG1)*Ix(U1:G1)+V(VK1)*Ix(U1:K1)+V(VG2)*Ix(U1:G2)+V(VK2)*Ix(U1:K2)+V(HS)*Ix(U1:Tc1)+V(HS)*Ix(U1:Tc2)+V(TjQ1)*Ix(U1:TjQ1)+V(TjQ2)*Ix(U1:TjQ2)+V(TjD1)*Ix(U1:TjD1)+V(TjD2)*Ix(U1:TjD2)+V(N012)*Ix(U1:Baseplate)

I would like to use the model equation, I think it is much too accurate, because it has many dependencies in it, which corresponds to reality.