Enhanced Thermal Couple Term Model for Power Modules

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 6Sprache: EnglischTyp: PDF

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Stroebel-Maier, Henning (Danfoss Silicon Power GmBH, Germany)

In this paper, a thermal coupling network for a directly cooled ShowerPower 3D(r) module is introduced. The data required for the network is created by using CFD-methods with a multi physical approach. The CFD results are used to create a nonlinear analytical fit function which can estimate the temperature of every component much more precisely than the linear models. This holistic approach shows that the copper losses of the DBC metallization must not be neglected in thermal modelling. Furthermore, the model is capable of estimating the device temperatures during operation using the NTC temperature as a reference.