Christoph Unterrieder

Learn More
—A reliable knowledge of cell parameters like the state-of-charge (SoC) is essential for the optimization of battery-powered applications. Usually, during relaxation (the phase of no or low loads) the SoC is determined based on the measurement of the battery's electro-motive force (EMF). To obtain a reliable measurment, it is required that the battery(More)
—In this paper, novel small-signal averaged models for dc–dc converters operating at variable switching frequency are derived. This is achieved by separately considering the on-time and the off-time of the switching period. The derivation is shown in detail for a synchronous buck converter and the model for a boost converter is also presented. The model for(More)
  • 1