Multirate DAE-Simulation and its Application in System Simulation Software for the Development of Electric Vehicles

new accepted paper by Michael Kolmbauer, Günter Offner, Ralf Uwe Pfau, and Bernhard Pöchtrager


This work is devoted to the efficient simulation of large multi-physicalnetworks stemming from automated modeling processes in system simulation soft-ware. The simulation of hybrid, battery and fuel cell electric vehicle applications re-quires the coupling of electric, mechanic, fluid and thermal networks. Each networkis established by combining the connection structure of a graph with physical equa-tions of elementary components and resulting in a differential algebraic equation(DAE). In order to speed up the simulation a non-iterative multirate time integrationco-simulation method for the system of coupled DAEs is established. The power ofthe multirate method is shown via two representative examples of a battery poweredelectric vehicle with a cooling system for the battery pack and a three phase inverterwith a cooling system.

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