• Energy Research

The automotive power system is being increasingly expanded by adding high-dynamic power electronics. These components can potentially cause malfunction or failure of safety-relevant low-voltage components. The susceptibility to disturbances is often reduced by usage of oversized passive input electronics. This paper introduces an alternative means of disturbance suppression by the introduction of system integrated adaptive passive filters. A proposed methodology is presented for examining the suitability of potential access points within complex networks. An algorithmic procedure for the parametrization of several switchable bandpass filter stages is explained. The in-vehicle measurement demonstrates the effectiveness of the dimensioned filter being able to reduce disturbances at 70 kHz by more than 75 %.

Virtually developing of automotive power systems is currently experiencing increasing significance due to elevated vehicular electrification and automation of driving functions. The analysis of system-inherent disturbances requires accurate simulation models for both short-term transients or long-term driving cycles. The electrical behavior of electromechanical actuators such as brake or steering highly depends on the mechanical environmental interaction being dependent many variables. This contribution presents a methodology to extract abstracted models of machine driven actuators on the basis of an electric steering. The dynamics of a complex electromechanical model are investigated using pulse response analysis for differentiated operation points. The obtained model reduction is implemented in a frequency-dependent equivalent circuit.