I have a question. I am using PLECS 5.0.3 to analyze losses in a HERIC inverter that uses MOSFETs with diodes. To do this, I uploaded the thermal model for the IPW60R041P6 MOSFET and placed a Heat Sink block over the full-bridge switches, and another over the Bypass switches. Using a PROBE and a SCOPE, I analyzed the plot for conduction and switching losses across the switches.
The problem is that the average dissipated power shown by the HEAT SINK block is higher than the sum of the losses in the switches themselves. For example, the heat sink block over the full-bridge indicates a power dissipation of approximately 50 W. The conduction losses for a single switch are around 1 W, and its switching losses are around 8x10^-5 W. Since all four switches in the bridge behave similarly, the sum of the individual switch losses is much lower than the value reported by the heat sink.
What could be happening here? How does PLECS calculate these losses?