The coupling of electrotechnical and structural dynamics domains for a NVH system model of an electrical drive train

Abstract

In this paper, an approach is presented using the example of a drive train of a series-produced electric vehicle which connects the electrotechnical domain with the structural dynamics domain in an efficient way including retroactive effects. On the electrotechnical side, the transient, nonlinear system model considers control, power electronics and the behavior of the electrical machine under the influence of manufacturing deviations and structural dynamic feedback such as dynamic eccentricity, torsion and bending of the rotor. On the structural dynamics side, the complete drive train including shaft system, gearbox and housing is represented in an elastic multibody simulation in the time domain to simulate transient processes. The approach allows the calculation of the nonlinear acoustic system behavior and is validated by measurements. The possibilities to study the sensitivities of the NVH behavior by variant calculations or to optimize components in the design process on system level are shown and discussed.