Iron loss in the choke coil’s core and copper loss in its coil become a heat source in addition to reducing efficiency, so they need to be understood and reduced from a heating design standpoint. An analysis using the finite element method (FEM) is effective in getting more information about the design by quantitatively evaluating the heat generation phenomena with copper and iron losses as the heat sources.
This Application Note shows the use of a thermal analysis to obtain the temperature distribution using the iron losses and copper losses in the choke coil as the heat source.
Fig. 1 shows its temperature distribution, and fig. 2 shows the maximum temperature in each part.