Patent ID: 7230396

Claim:
A device for switching currents in a stator winding of a generator-electric motor combination, wherein the stator winding comprises at least one winding that can be shorted or switched to high resistance through at least one device, wherein the at least one winding is connected to a capacitor, by means of which voltage peaks, because of the switching processes, can be reduced and the energy stored in the stator winding can be temporarily stored, wherein at least one switchable decoupling element is arranged between the winding and the capacitor, in which energy to be temporarily stored via decoupling element can be taken off, because of disengagement of the device in a nonworking cycle, as a charging current for the capacitor and the temporarily stored energy can be fed back to the stator winding as working current in the working cycle, wherein the decoupling element is temporarily controlled during feedback, so that the capacitor voltage does not drop below a fixed voltage value.