the method includes the steps of operating first and second switches to an u201c on u201d position operating said first switch to a u201c off u201d position causing a flow of a first free wheeling current through a first free wheeling current path measuring a value of said free wheeling current controlling the switching of said second switch responsive to said value of said free wheeling current and regulating power from said power supply unit the power supply includes an inductive converter a first free wheeling current path comprising a first switch connected in series with said inductive converter and a first means for measuring a first free wheeling current flowing through said first free wheeling current path and a second free wheeling current path comprising a second switch connected in series with said inductive converter and a second means for measuring a second free wheeling current flowing through said second free wheeling current path application_number US 56707905 A description fig1 shows a block diagram of the actuation of an electric motor in a drive system a control system 1 generates actuation values with an electric motor 2 being intended to be actuated on the basis of the actuation values the electric motor 2 is usually actuated using a power electronics circuit 3 which comprises a power stage 4 and a driver circuit 5 in the example shown the power stage 4 generates three phase currents and for this purpose typically has 6 electronic switches not shown which are actuated by means of respective switching signals from driver circuit 5 the electric motor 2 is preferably in the form of a synchronous or asynchronous motor particularly in the.