초록 ▼

The invention relates to a rotating electric machine, especially an alternator or alternator/starter for motor vehicles, including a stator surrounding a rotor ( 10 ) equipped with a pack of metal plates, a gap between the stator and the rotor, permanent magnets integrated into the rotor and excitat

The invention relates to a rotating electric machine, especially an alternator or alternator/starter for motor vehicles, including a stator surrounding a rotor ( 10 ) equipped with a pack of metal plates, a gap between the stator and the rotor, permanent magnets integrated into the rotor and excitation coils ( 14 ) integrated into the rotor, in which the excitation coils are wound around salient poles ( 1310 ) cut out in the pack of metal plates of the rotor, and the permanent magnets are accommodated in housings ( 13110 ) formed in the pack of plates of the rotor and open towards the periphery of the rotor, characterized in that the housings ( 13110 ) are closed axially at each of their ends by a non-magnetic retaining piece ( 13 ) equipped with a part intended to come into abutment with the magnets, and in that the retaining piece features recesses for accommodations [sic] of the buns of the excitation coils ( 14 ).

대표청구항 ▼

1. Rotating electric machine, especially an alternator or alternator/starter for motor vehicles, including a stator surrounding a rotor ( 10 ) equipped with a pack of metal plates ( 11 ), a gap between the stator and the rotor, permanent magnets ( 15 , 16 ) integrated into the rotor and excitation c

1. Rotating electric machine, especially an alternator or alternator/starter for motor vehicles, including a stator surrounding a rotor ( 10 ) equipped with a pack of metal plates ( 11 ), a gap between the stator and the rotor, permanent magnets ( 15 , 16 ) integrated into the rotor and excitation coils ( 14 ) integrated into the rotor, in which the excitation coils are wound around salient poles ( 1310 ) cut out in the pack of metal plates of the rotor, and the permanent magnets are accommodated in housings ( 13110 , 1160 ) formed in the pack of plates of the rotor, characterised in that the housings ( 13110 ) are closed axially at each of their ends by a retaining piece ( 13 ) equipped with a non-magnetic part ( 132 , 13220 ) intended to come into abutment with the magnets, and in that the retaining piece features recesses ( 1323 ) for accommodating buns of the excitation coils. 2. Machine according to claims 1 , characterised in that the retaining piece, at its outer periphery, features axial extensions ( 13100 , 13111 ) directed in the reverse direction with respect to the pack of plates ( 11 ) of the rotor and shaped to retain the excitation coils ( 14 ) counter to the action of centrifugal force. 3. Machine according to claim 2, characterised in that the end part of the said extensions is inclined towards the rotational axis of the machine. 4. Machine according to claim 3, characterised in that the said extensions ( 13100 , 13111 ) have a pointed shape, such as trapezoidal. 5. Machine according to claim 3, characterised in that the said extensions are carried by a ferromagnetic cap ( 131 ) which has the same shape as the plates, the said cap being interposed between the pack of plates and a non-magnetic flange ( 132 ), the cap and the flange constituting the retaining piece ( 13 ). 6. Machine according to claim 2, characterised in that the retaining piece ( 13 ) carries fan blades ( 18 , 118 , 1118 ), and in that the blades extend in projection from the retaining piece. 7. Machine according to claim 6, characterised in that the blades ( 118 ) are of a single piece with the retaining piece. 8. Machine according to claim 6, characterised in that the blades are attached to the retaining piece. 9. Machine according to claim 8, characterised in that the surface of the retaining piece features bosses for holding the blades. 10. Machine according to claim 1, characterised in that grooves ( 1325 ) are provided on the surface of the flange for accommodating a wire ( 140 ) of the excitation coils when the said wire passes from one coil, to the other.