Rotor for rotary electric machine comprising magnet element between two adjacent teeth

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 (26a) 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 (26a) 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.