20140054985 | INTERNALLY EXICTED SYNCHRONOUS MOTOR COMPRISING A PERMANENT MAGNET ROTOR WITH MULTIPLE CORROSION PROTECTION - A module for a rotor of an electric machine, said rotor being excited by means of permanent magnets and rotating in a liquid medium, wherein the module contains a cylindrical, active part having a plurality of circular, magnetically soft laminations which form a laminated stack and have a central opening for receiving a rotor shaft; wherein at least two permanent magnets protected against the liquid medium are arranged in at least two corresponding cutouts in the laminated stack, the cutouts being formed under a cylindrical circumferential surface of the laminated stack. | 02-27-2014 |