Predicting these losses and the heat that they generate is a vital component of transformer design, but it is difficult to estimate them from desktop calculations, so evaluations and detailed analyses using the finite element method (FEM) are indispensable.
This note obtains loss distribution for each component in drive condition and checks local overheating.
Joule Loss Density Distribution
Fig. 1 shows the magnetic flux density distribution, fig. 2 shows the current density distribution, and fig. 3 shows the joule loss density distribution in the tank. From fig. 1, it is apparent that magnetic flux is leaking from the transformer to the tank. This leakage flux generates eddy currents in the tank, as shown in fig. 2. Fig. 3 shows that joule losses get bigger in places with high current density.
Joule loss distribution or the shield, clamp and connector are displayed in figures 4 through 6 Check the danger of localized heating from joule loss distribution in each part.