Abstract: A rotor is provided for a rotating electric machine. The rotor includes a magnetic pole core and a cooling fan. The cooling fan includes a base plate laser-welded to an axial end face of the magnetic pole core and a plurality of fan blades extending from the base plate. Further, in the rotor, a weld formed between the base plate of the cooling fan and the magnetic pole core has a pair of open ends.

Abstract: A rotor is provided for a rotating electric machine. The rotor includes a magnetic pole core and a cooling fan. The cooling fan includes a base plate laser-welded to an axial end face of the magnetic pole core and a plurality of fan blades extending from the base plate. Further, in the rotor, a weld formed between the base plate of the cooling fan and the magnetic pole core has a pair of open ends.

Abstract: A vehicle alternator is disclosed as having a rotor including magnetic pole pieces, each having claw-like magnetic pole fingers, a field coil wound on boss portions of the magnetic pole pieces, and cooling fans fixedly mounted on the magnetic pole pieces, respectively. Each cooling fan includes a central disc portion, a plurality of fan base portions formed on the central disc portion, and fan blades standing upright from the fan base portions in an axially outward direction, respectively. The central disc portion has an outer circumferential periphery formed with a plurality of cutout portions to be contiguous with roots of the fan base portions, respectively, and placed in areas radially inward of the fan blades, respectively. Each cutout portion is so placed to be perpendicular to the radial direction on which each claw-like magnetic pole finger is oriented.

Abstract: A vehicle alternator is disclosed as having a rotor including magnetic pole pieces, each having claw-like magnetic pole fingers, a field coil wound on boss portions of the magnetic pole pieces, and cooling fans fixedly mounted on the magnetic pole pieces, respectively. Each cooling fan includes a central disc portion, a plurality of fan base portions formed on the central disc portion, and fan blades standing upright from the fan base portions in an axially outward direction, respectively. The central disc portion has an outer circumferential periphery formed with a plurality of cutout portions to be contiguous with roots of the fan base portions, respectively, and placed in areas radially inward of the fan blades, respectively. Each cutout portion is so placed to be perpendicular to the radial direction on which each claw-like magnetic pole finger is oriented.

Abstract: A rectifier protection arrangement of a vehicle rotary electric machine is disposed where conductive liquid may be splashed on thereon. The arrangement includes a positive conductor member that is connected to a positive terminal of a battery and has a higher normal electrode potential than hydrogen and an insulation member disposed in contact with a ground potential conductor member to insulate the positive conductor member, a sacrificing metal member that has a lower normal electrode potential than the positive potential conductor member is disposed between the positive conductor member and the insulation member. The sacrificing metal member has a higher electric resistance than the positive potential conductor member if oxidized.

Abstract: A rectifier protection arrangement of a vehicle rotary electric machine is disposed where conductive liquid may be splashed on thereon. The arrangement includes a positive conductor member that is connected to a positive terminal of a battery and has a higher normal electrode potential than hydrogen and an insulation member disposed in contact with a ground potential conductor member to insulate the positive conductor member, a sacrificing metal member that has a lower normal electrode potential than the positive potential conductor member is disposed between the positive conductor member and the insulation member. The sacrificing metal member has a higher electric resistance than the positive potential conductor member if oxidized.