Patent ID: 7977847

Claim:
A vehicle alternator comprising a rotor, the rotor including: a first pole core having a plurality of circumferentially disposed first claws; a second pole core having a plurality of circumferentially disposed second claws, each of the second claws and each of the first claws of the first pole core is circumferentially disposed alternately in a face-to-face manner; a field coil disposed at the inner diameter side of the circumferentially disposed claws; and a plurality of holders, each of the holders contains a magnet and is disposed between the corresponding first claw and the second claw; wherein the holder is made of a tubular member, the tubular member has an opening at one or both ends, the tubular member contains the magnet and is deformed by press forming in a direction perpendicular to a direction the magnet is inserted so as to close the opening/openings.