Modeling of electric vehicles dynamics with Multi-Bond Graphs

The construction of a model that represents the behavior of an Electric Vehicle is studied in detail. The contribution of this work is twofold. On one hand an efficient and compact way to model dynamical systems is introduced. On the other hand, the power interchange between the electrical and mechanical sub-models allows a deep understanding of the dynamics involved in electrically driven vehicles. The approach used to model the mechanical parts (chassis, suspension, wheels) and the induction motors is the Multi-Bond Graph based in models discussed in recent literature. Then these models are integrated in order to form the complete model that simulates the whole system dynamics. Simulation results are aimed to illustrate the electromechanical interaction (ABS, regenerative braking, etc) as well as the evolution of certain variables during a risky situation. Conclusions are obtained based on these results.