Abstract: The invention relates to a rotor (11) for an electrical machine, in particular for a motor vehicle, having an axis of rotation (X), a rotor radius (Rr), a polar step (?), and including a body (31) comprising a plurality of rotor teeth (40) defining cavities (36) in which permanent magnets (37) are accommodated, each rotor tooth (40) comprising a single lip (41) for radial retention of a permanent magnet, and an assembly of magnetic poles (50), each pole having a curvature in the form of an arc of a circle, the said arc of a circle being defined by a radius of curvature (Rc), a centre of curvature (Cc), and a polar angle (2?p), the said rotor having a ratio (r) between the radius of curvature (Rc) and the rotor radius (Rr) contained between 0.52 and 0.63, and a ratio (?) between the polar half-angle (?p) and the polar step (?) contained between 0.62 and 0.80.

Abstract: The invention mainly relates to a claw-pole rotor (2) for a rotating electric machine, characterized in that said rotor comprises a plurality of magnets (20) that are located between the poles and are made of neodymium-iron-boron having a dysprosium content of less than 2% by weight. By keeping the dysprosium content in the magnets of the rotating electric machine to a minimum, the invention thus does away with the problems associated with the limited dysprosium supplies and its cost.

Abstract: The invention relates mainly to a rotary electrical machine (10) comprising: a rotor (12) comprising permanent magnets (39); a stator (11) comprising a body (16) and a three-phase winding (25), characterised in that: the coupling of the coils (26) is of the triangle-series type; and the product of the number of turns of each coil (26), of the axial length of the stator body (16) expressed in mm, and of the inner diameter (L2) of the stator body (16) expressed in mm, is contained between 38998 and 39142; the number of turns being contained between 23 and 37, the axial length of the stator body (16) being contained between 17 mm and 27 mm, and the inner diameter (L2) of the stator body (16) being contained between 62 mm and 67 mm.