Patent ID: 7679259
Filing Date: 2010-03-16
Classification: H02K

Abstract:
1. A claw-pole rotor for an electrical machine, having two pole wheels ( 26 , 27 ), which each carry claw poles ( 28 and 29 , respectively), which each originate in a plate region ( 50 ) and have a pole root ( 53 ), and on a circumference of the claw-pole rotor ( 20 ), claw poles ( 28 , 29 ) of the pole wheels ( 26 , 27 ) are located in alternation, and located between claw pole interstices ( 56 ), and a claw pole ( 28 , 29 ) has a radially outward-oriented cylindrical-jacketlike surface ( 43 ), by which a pivot axis ( 65 ) is defined, wherein a chamfer ( 68 ) extends on the one hand in a circumferential direction and on the other in an edge direction of a claw pole ( 28 and 29 , respectively), wherein the chamfer ( 68 ) has a center (M), wherein the center (M) centrally divides a length (l) of said chamfer ( 68 ), wherein the chamfer ( 68 ) has a center portion (m) in an edge direction that intersects a transition plane ( 59 ) which demarcates the pole root ( 53 ) and the freely projecting part of the claw pole ( 28 and 29 , respectively), wherein the center portion (m) is arranged symmetrically relative to the center (M), wherein the center portion (m) amounts to 8/10 of the length, oriented in the edge direction, of the chamfer ( 68 ); and wherein the claw pole ( 28 , 29 ) has a width B K oriented in the circumferential direction, wherein a half width B K on the cylindrical surface ( 43 ), in a plane of the claw pole ( 28 , 29 ) that is vertical to the pivot axis ( 65 ), defines a point (P), wherein a tangent (T) is inscribable into said point (P), and an angle of inclination α which has a magnitude of between 15° and 25° is enclosed between the tangent (T) and the chamfer ( 68 ) in the plane that is vertical to the pivot axis ( 65 ), and wherein the tangent (T) lies in a plane that is vertical to the pivot axis ( 65 ).