Thermal modeling of planar transformer for switching power converters

Features measurement and reliability considerations on a proposed main converter for LHC experiments

“…In order to dissipate the heat generated by Joule's effect in secondary windings, we have utilized thermal layers [33]. During both the design and test phases of the MC, the planar transformer with PCBs, as before described, has been replaced with copper windings separated by mica in order to get better thermal performance and then higher reliability.…”

Thermal modeling and design of power converters with tight thermal constraints

“…The simplified device models can be collected from previous works [2,6,7] or added for the current case study.…”

“…This simplified FE model was built as done in [6] assuming the windings as homogeneous material, with uniform heat sources, and starting from the detailed model described in [7]. The simplified transformer, together with aluminum bars and iron screws used for clamping it to the heat-sink, is depicted in Fig.…”

“…11) has the core bottom thermally connected to the baseplate. Starting from the analysis in [7], this transformer was wrapped by aluminum bars and plates, to carry the heat generated in the upper zones towards the cold plate. Between aluminum thermal bridges and everywhere a part is near the baseplate, a thermal conductive gap filler (paste or pad) is placed.…”

Reliability oriented design of power supplies for high energy physics applications

“…The thermal conduction through the inner thermal layers is guaranteed by a number of copper plated vias. A detailed description of the thermal design of the planar transformer can be found in [7].…”