Patent ID: 7872389

Claim:
An electric drive with a permanent outer and inner stator and a rotor, a plurality of permanent magnet elements arranged on the rotor for producing an excitation flux being provided and at least one electrical field coil, the rotor comprising at least one bell shaped part, having a cylindrical wall and a base wall, the base wall being mounted perpendicularly and the cylindrical wall coaxially in relation to the axis of the rotor shaft, and the base wall being connected to the rotor shaft for transmitting a force or a torque, the permanent magnet elements resting on one side on the cylindrical wall and secured side by side to the rotor of the drive in the peripheral direction, the permanent magnet elements interacting with the outer and inner stator to give magnetic circuits, which completely extend through the cylindrical part of the rotor in the radial direction, wherein the permanent magnet elements are arranged only on the exterior of the cylindrical wall, wherein the cylindrical wall is integral with the base wall, wherein the cylindrical wall is made of a ferromagnetic material, wherein the electric drive further comprises an air gap between the wall and the magnetic feedback part forming the magnetic feedback or inner stator, and wherein the outer stator bears at least one electrical field coil.