Patent ID: 10955446

Abstract:
A method for ascertaining phase currents of an electric machine including a converter and stator including stator windings (phase number of at least three), in which the phase currents of measuring phases (at least two), are measured, the phase currents being measured in a measuring interval when the active switching elements of the measuring phases in a lowside path of the converter are activated in a switching interval delimited by a switching-on point-in-time and switching-off point-in-time, the phase currents of the remaining phases being determined arithmetically from the measured phase currents so that the measured phase currents, a spatial angle of the measuring phases, and a spatial angle of the remaining phases are used for arithmetic determination, in which the measuring interval is selected to be with respect to time outside a switching-on point-in-time or switching-off point-in-time of at least one of the active switching elements of the stator phases.