| Abstract |
Modular power inverter systems for auxiliary drives in utility vehicles can meet various differentcustomer requirements. A model based approach can be used for validating the thermal design of thosesystems in any suitable modular configuration. This contribution is focused on an equivalent lumpedthermal network model for a modular inverter system on a given heat sink concept. The proposednetwork representation is based on spatial splitting of the heat sink geometry whereby the lumpednetwork elements are parametrized by means of the heat sink geometry. Since the proposed network iseasy and straightforward, a minimum of variables are introduced to adjust the temperature resultsempirically with FEM results on certain reference operation points. Furthermore, modularity isconsidered due to the coolant and therefore, customer specific placement of modules can beinvestigated. Finally, the proposed model is compared with FEM results of a worst case systemconfiguration, the influence of the introduced adjustment variables is shown and further validationresults with thermal measurements and FEM results of different system configurations are given. |
