High Speed Hybrid Simulation Engine for Electrical Mission Profiles

Abstract:
In this paper, two common simulation methods are described and analysed, which are used to calculate the power losses and the resulting power module temperatures in an inverter system for a specific mission profile. The advantages, disadvantages and limitations of both methods are described. Subsequently, a way is shown how to combine both methods to create a hybrid simulation engine that provides superior computation speed and simulation accuracy over the entire inverter output frequency range including 0 Hz. The simulation program SemiSel 5 contains the hybrid simulation engine. Example calculations demonstrate that the hybrid engine is more than 50 times faster than the conventional method, while offering a maximum of accuracy and numerical stability.