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I think you can sense the current through the varying resistor. If you have enough money, you can use LEM. Once voltage and current all know, you know the resistance, then the temperature. I think you can use a MCU (cpu like 8051) with a curve table to solve the problem.
I think it is very hard to get the value with high precision. Because the switching losses depend on the topology, driving circuits, temperature, and the type of the mosfet. Some one using oscillograph to get the current and voltage waveforms, then get the loss value. But it is still not good...
If your are using PSpiceAD, you can access "window/Display Control"
then give a "New Name" and save.
when you want to reuse, you can "Restore".
happy holiday!!!
you can use N-mos instead of the P-mos.
But the gate driving circuits will be complex.
And you can use some special driving IC or drivng transformer to drive the high side N-mos in Buck regulator.
So the high efficiency can be obtained.
time step too small
I also meet this problem in orcad (pspice).
After increase the default convergence times (maybe K4 in orcad9) from 10 too 200, many Transient analysis can run but the speed is slow.
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