Improved load modelling for switching power supplies in electrified vehicles

The trend for hybrid powertrain concepts has led to a widespread application of electric drives and electronic inverters in electrified vehicles. The operating principle of switched mode power supplies causes different motor excitations with respect to the excitation signals under stationary conditions. I.e. the motor is driven by fast transient switching signals instead of single harmonic signals, respectively. The simulation based prediction of occurring side effects like resonances becomes a matter about the accuracy of the load model. In this paper we present improved load modelling for electric motors in electrified vehicles to cover occurring side effects due to switching power supply excitation.