Patent ID: 8264119

Claim:
A rotor ( 10 ) for a rotary electrical machine, the rotor comprising: two magnet wheels ( 12 ), each of which extends roughly radially with respect to the principal axis of the rotor ( 10 ), and comprises a series of axial teeth ( 20 ), each tooth ( 20 ) of which extends axially inwards from the associated magnet wheel, in the direction of the other magnet wheel ( 12 ), so that each tooth ( 20 ) on a magnet wheel ( 12 ) is situated in the space existing between two consecutive teeth ( 20 ) on the other magnet wheel ( 12 ); and at least one magnetic element ( 24 ) with a longitudinal principle orientation that is arranged transversely between two adjacent teeth ( 20 ) belonging respectively to each magnet wheel ( 12 ); each of opposite lateral faces ( 22 ) of the two adjacent teeth ( 20 ) having a groove ( 26 ) with a bottom ( 26 a ) extending in the longitudinal direction of the lateral face ( 22 ) so that the two grooves ( 26 ) on the two adjacent teeth ( 20 ) delimit a housing in which the magnetic element ( 24 ) is housed and so that a transverse width (Lg) of the magnetic element ( 24 ) being substantially equal to the distance between the bottoms ( 26 a ) of the two opposite grooves ( 26 ); the magnetic element ( 24 ) comprising at least one magnet ( 28 ), at least one support shim ( 30 ) produced from a non-magnetic material and mounted on a transverse end face of the magnet ( 28 ), and means for connecting the support shim to the magnet; the support shim ( 30 ) being received in an associated groove ( 26 ); the ratio between a width of the magnet ( 28 ) and the transverse width (Lg) of the magnetic element ( 24 ) is between 0.4 and 1.