The electrical energy system has a common armature (5) for both the motor and the generator sides (M, G), the generator side (G) having a north pole (1) and a south pole (2) and the motor side (M) having a south pole (3) and a north pole (4). The motor side has a greater length than the generator side, so that the braking effect caused by the generator side when both sides have the same current requirement is eliminated.
