Simulation of a high voltage system in a hybrid electrical vehicle

  High-Volt-System Copyright: © IEM

In modern (hybrid) electric vehicles the electrical system includes different voltage levels. Visualization of the electric quantities such as currents and voltages of a high voltage system under load conditions is presented in this work. Different strategies of electric component modeling such as machines or power electronics are used for an intensive analysis of the electrical system. Evaluation of the DC-link with respect to transients and feedbacks resulting from operational performance or fault operation is possible. The figure shows a typical electrical system of a mild hybrid vehicle. Signal flow oriented methods using transfer functions and modeling approaches based on electric equivalent circuit with concentrated parameters are used. A combination of both methods, which exploits the advantages of both, gives the required detail level.