Patent ID: 7808147

Claim:
A rotor ( 3 ) for a permanent magnet motor, comprising a yoke ( 7 ) formed of a plurality of axially stacked sheet lamellas ( 10 ) and having a plurality of receptacles ( 16 ); and a plurality of permanent magnets ( 6 ) symmetrically circumferentially offset relative to each other and are arranged in respective receptacles ( 16 ), wherein the lamellas ( 10 ) each has a coaxial inner hole ( 9 ), at least one first recess ( 8 a ) open toward the inner hole ( 9 ), and at least one second recess ( 8 b ) closed toward the inner hole ( 9 ), first and second recesses ( 8 a , 8 b ) of the lamellas ( 10 ) forming the plurality of receptacles ( 16 ), wherein the lamellas ( 10 ) are formed rotationally symmetrically for rotation about at least a phase angle (φ), and at least two lamellas are offset relative to each other by a half of the phase angle (φ), and wherein notches ( 13 ) are provided in the sheet lamellas ( 10 ) between the recesses ( 8 a , 8 b ) which open toward the inner hole ( 9 ) and are circumferentially offset and extend along a notch angle (α) which is quantitatively greater than half of the phase angle (φ).