Abstract: A method and a system for determining a phase shift between a phase current and a phase voltage in an AC phase line of a converter. A method and a system for determining a phase shift between a phase current and a phase voltage in an AC phase line of a converter, in particular a converter of a system for inductive power transfer, wherein a phase current change dependent quantity is determined, wherein a voltage-specific reference time point is determined depending on the phase current change dependent quantity, wherein the phase current is determined, wherein a current-specific reference time point is determined depending on the phase current, wherein the phase shift is determined depending on the time difference between the voltage-specific reference time point and the current-specific reference time point.

Abstract: A method and a system for determining a phase shift between a phase current and a phase voltage in an AC phase line of a converter. A method and a system for determining a phase shift between a phase current (Iu, Iv, Iw) and a phase voltage (Uu, Uv, Uw) in an AC phase line (U, V, W) of a converter (5), in particular a converter (5) of a system for inductive power transfer, wherein a phase current change dependent quantity is determined, wherein a voltage-specific reference time point is determined depending on the phase current change dependent quantity, wherein the phase current (Iu, Iv, Iw) is determined, wherein a current-specific reference time point is determined depending on the phase current (Iu, Iv, Iw), wherein the phase shift is determined depending on the time difference between the voltage-specific reference time point and the current-specific reference time point.

Abstract: An apparatus for detecting energy consumption in a local power supply system having at least one central line and a plurality of sublines branching from the central line and connected to consumers includes at least one detection unit for centrally detecting the individual energy consumptions of the individual consumers, the detection unit having an analog-to-digital converter detecting electric voltage on the central line. An analog input of the analog-to-digital converter is connected to the central line. The detection unit has a plurality of input channels, each input channel being coupled to a measuring transformer integrated into one of the sublines for measuring the flow of current through said subline. The detection unit is configured to successively sample the input channels and determine individual energy consumptions in each subline based on measured current flow through sublines and detected voltage on the central line.