Simulation-Based Optimization of Multi Voltage Automotive Power Supply Systems

Complex multi-voltage automotive power supply systems are difficult to optimize. In this paper a simulation-based method to optimize multi voltage power supply systems is presented. With an electrical-thermal wire model the ampacity and the voltage drop of a cable can be determined. With these criteria cables of the power supply system can be dimensioned. By extending the electric-thermal models with functions defining costs, weight and space of the wires and DC/DC-converter models evaluation and optimization of multi-voltage vehicle systems is possible.