Claw rotor equipped with insulator for an excitation coil and magnets, and rotary electrical machine equipped with rotor of this type

摘要

The claw rotor (2) comprises: an axial symmetry axis (X-X); two magnet wheels having a core and teeth (9); insulation (11′) for a field coil (10) mounted onto the core; and permanent magnets mounted between two adjacent teeth (9) belonging to one and the other of the magnet wheels, wherein the insulation (11′) comprises a hub and a flange on each end of the hub (110), each flange having a plurality of projecting petals for engaging with the angled inner periphery (90) of a tooth (9). At least some petals of a flange (120) corresponding to the permanent magnets (38) are split into a plurality of portions, namely, a main petal (121a) for engaging with the inner periphery (90) of a tooth of the magnet wheel (8) in question and at least one side secondary petal (121b) that is lower, when seen in the radial direction, than the main petal. The rotating electrical machine comprises such a rotor. The invention is of use in a claw rotor for motor vehicle alternator or alterno-starter.

主权项

1. A claw rotor (2) for an alternator or alternator-starter of a motor vehicle, the rotor comprising;
an axis of axial symmetry (X-X); two magnet wheels (7, 8) each comprising a flange bearing projections (19) extended by teeth (9) with axial orientation facing towards the flange of the other magnet wheel (8, 7); a core interposed between the flanges of the magnet wheels (7, 8); an insulator (11′) for an excitation coil (10) fitted on the core and permanent magnets (38) fitted between two adjacent teeth (9) belonging to one and the other of the magnet wheels (7, 8); the insulator (11′) comprising a hub (110) fitted onto the core, and a cheek (130, 120) at each of the ends of the hub (110), each cheek (120, 130) supporting a plurality of projecting petals (121, 131) designed to co-operate with an inclined inner periphery (90) of one of the teeth (9); the petals of one cheek (120, 130) are associated with the permanent magnets (38) and are divided into a plurality of parts; the plurality of parts comprising a main petal (121a) for co-operation with the inner periphery (90) of the tooth (9) of the magnet wheel (7, 8) and at least one lateral secondary petal (121b), both extending radially outwardly; a height in the radial direction of the at least one lateral secondary petal (121b) is lower, than a height in the radial direction of the main petal (121a).