Patent ID: 6720703
Filing Date: 2004-04-13
Classification: H02K

Abstract:
An electrical machine having a rotor (10), having an exciter system of electrically excited individual poles in the rotor (10), wherein said individual poles are electromagnetically excited poles (28) and counterpart poles (34), having a pole gap closure (55), inserted between the electromagnetically excited poles (28) and counterpart poles (34) that alternate on a circumference of the rotor (10), wherein said pole gap closure (55) at least partly fills open spaces, characterized in that the pole gap closure (55) is braced by at least one axial end region, via projections (64), on pole roots (31, 37), wherein the pole gap closure (55) has axial regions (61) having two peripheral sides, wherein each of said peripheral sides has a recess (67) formed therein, wherein said projections (64) are fitted into said recesses (67), whereby surfaces oriented outward of the pole gap closure (55), electromagnetically excited poles (28) and counterpart poles (34) result in an essentially cylindrical surface of the rotor (10) and wherein the at least one axial end region extends between two pole roots of one pole wheel.