Rotor for an alternator

A rotor for an alternator, comprising:

• a pair of rotor iron cores, in which plural claw-shaped magnetic poles, each approximately formed in a trapezoidal shape, are arranged at outer circumferential portions of disk-shaped basic portions at given intervals in a circumferential direction, said rotor iron cores being fitted to a shaft and being integrated with the shaft by abutting said basic portions so as to interdigitate the claw-shaped magnetic poles with each other;
• a winding would around said basic portions for generating magnetic flux by the flow of an exciting current;
• plural reinforcing bodies, each approximately formed in a U-shape, and having wing portions arranged at both sides of an attaching portion having a flat plate shape, and disposed such that the attaching portion faces an inner circumferential wall surface of one of said claw-shaped magnetic poles, said wing portions being located on either side of said claw-shaped magnetic pole in the circumferential direction;
• and
• plural magnets, each fixedly attached to a wing portion of each of said reinforcing bodies and disposed on either side of said claw-shaped magnetic pole in the circumferential direction, for reducing magnetic flux leakage between adjacent claw-shaped magnetic poles, wherein
• a multidegree of freedom vibrating system composed of said claw-shaped magnetic poles and said reinforcing bodies having said magnets fixedly attached thereto, wherein a press-fit ring-shaped interposing object presses at least one portion of said attaching portion reinforcing bodies against the inner circumferential wall surfaces of said claw-shaped magnetic poles.