Patent ID: 7116020
Filing Date: 2006-10-03
Classification: H02K

Abstract:
1. An alternator, for a motor vehicle, comprising a stator ( 12 ), a rotor ( 4 ) disposed within the stator ( 12 ) and carrying at least one excitation winding ( 5 ), the stator ( 12 ) having a plurality of phases, wherein the stator comprises at least two armature windings connected to a current rectifier device ( 11 ) of an apparatus for supplying electrical power, in particular for an on-board network of a motor vehicle, and wherein each armature winding is part of a power supply source connected between earth and a supply line, each source comprising at least one armature winding and a bridge of rectifying diodes; with one of the sources comprising an auxiliary bridge of rectifier elements of positive type, the other an auxiliary bridge of rectifier elements of negative type, with a means, connected to one and to the other of the said two bridges, being adapted to be controlled, for the purpose of: in a first state, connecting the two auxiliary bridges in series, the rectified voltage supplied to the supply line being then the sum of the voltages supplied by the armature winding or windings of each of the two sources and rectified, in a second state, blocking the connection between the two sources, which then feed the power supply line in parallel, wherein the auxiliary bridges of rectifying elements are arranged centrally with respect to the bridges of rectifying diodes of the two sources, and wherein the bridges are carried by a support which is fixed with respect to a rear bearing of the alternator.