Patent ID: 6930424

Claim:
An alternator for a motor vehicle comprising a stator, a claw-type rotor with N pole pairs which is arranged inside the stator and carries an excitation coil complete with an input wire and with an outlet wire, the stator comprising a cylindrical body, several phases each formed by a plurality of electrically conducting elements mounted in series along the periphery of the stator between an input and an outlet, the cylindrical body comprising, in its radially inner face, radial slots for accommodating at least four phase-conductor elements which are juxtaposed in the slot in the radial direction so as to form at least four layers of conductor elements, each conductor element exhibiting the form of a pin extending between two slots and including a first branch which is placed in a slot in a predetermined layer, and a second branch arranged in another slot in a predetermined layer and, between the two branches, on one axial side of the body of the stator, a head forming a U-shape seen in the peripheral direction, while, on the other axial side of the body, a free end of a branch of a conductor element is electrically connected to a free end of a branch of another conductor element, the half of the conductor elements which are engaged by their first branches in a slot being engaged by their second respective branches in the same other slot, each forming the said U-shapes between the two slots, wherein at least first and second conductor elements of the said half are such that the radial spacing of the layers to which the two branches of the said first conductor element belong is the same as the radial spacing of the layers to which the two branches of the said second conductor element belong, and in that the radii of curvature of the U-shapes of the two conductor elements are substantially identical, with eight conductor elements per slot, four of these conductor elements extending between the same two slots, wherein the said four conductor elements are grouped in pairs of adjacent conductors, the above-mentioned radial spacing being the same for the two conductor elements of the one pair, and wherein the radii of curvature of the U-shapes of the two conductor elements of the one pair are substantially identical.