Numerical modeling for heatsink emissions in power electronics

[摘要] The parasitic coupling between power semiconductors and the heat sink isresponsible for noise current in Switching Mode Power Supply (SMPS) systems.In this paper, the variations in the radiation characteristics of heatsinksare investigated with respect to their geometries by use of numerical models.Analyses are facilitated by using a mopole antenna as an EMI receiver and byusing simplified heatsink models as EMI transmitters to model the heatsinkradiated emissions. In addition, the analysis is confirmed usinglaboratory measurements.

[学科分类] 电子、光学、磁材料