A rotor for a rotary electric machine, the rotor including first and second pole pieces each having a respective magnetic hub arranged for rotation about an axis along which they are spaced. Pluralities of magnetic first and second pole fingers are spaced from each other and extend between the hubs. Each pole finger has a proximal end connected to its respective hub, and an axially opposite distal end. The first and second pole fingers circumferentially alternate about the axis, and each pole finger has a respective radially inner surface defining a cavity that extends axially from the distal end to a cavity terminus. Relative to each pole finger, at a respective axial position between the distal end and the cavity terminus the radial distance between the axis and the radially inner surface is substantially greater inside of the cavity than outside of the cavity.

[Problem] A winding is provided which is so arranged that disengagement of a winding conductor is not caused after a winding around being finished. [Constitution] A winding according to the present invention includes a first descending conductor portion (2818c) being bent from an end-portion (2818a) of a winding conductor placed at a top portion of an elevated winding portion (28m) toward an outer lateral side in an axial direction of a winding (15), and descending along a side face of the elevated winding portion (28m), from the top portion thereof to a predetermined winding layer (2816) among a plurality of winding layers constituting the elevated winding portion (28m); a first connection conductor portion (2816a) bent from the first descending conductor portion (2818c) toward an inner lateral side in the axial direction of the winding (15), and disposed along the side face of the elevated winding portion (28m) in a direction to which a winding conductor constituting the winding (15) extends; and a second descending conductor portion (2816c) being bent from the first connection conductor portion (2816a) toward the outer lateral side in the axial direction of the winding (15), and descending along the side face of the elevated winding portion (28m), from the predetermined winding layer (2816) to another predetermined winding layer (2814).

A vehicle brushless alternator assembly comprising: a claw pole rotor assembly having a pair of opposing pole pieces, the rotor defining an axis of rotation, each of the pole pieces having a plurality of circumferentially spaced pole fingers extending axially, the pole fingers of the rotor alternating between north and south magnetic polarities upon energization of the field coil; a cylindrical stator comprising armature enveloping the magnetic claw poles, the stator arranged coaxially relative to the drive shaft; a field coil structured to be positioned coaxially within an internal cavity of said rotor to arrange the field coil in a spaced apart relationship relative to internal walls defining the internal cavity of the said rotor; and a housing assembly surrounding said cylindrical stator with the drive shaft being supported by the housing assembly wherein the field coil is fixedly mounted to the housing assembly.

A vehicle brushless alternator assembly that includes a claw pole rotor assembly having a pair of opposing pole pieces. The rotor defining an axis of rotation, each of the pole pieces having multiple circumferentially spaced pole fingers extending axially. The pole fingers of the rotor alternating between north and south magnetic polarities upon energization of a field coil. The assembly including a cylindrical stator including armature enveloping the magnetic claw poles, the stator arranged coaxially relative to the drive shaft. The field coil positioned relative to said rotor to generate magnetic flux and the field coil including a first field winding electrically connected with a second field winding by a switch such that: in a first operable configuration the switch operates to electrically connect the field windings in series during energization and in a second operable configuration the switch operates to electrically connect the field windings in parallel during energization.