Patent ID: 6333582
Filing Date: 2001-12-25
Classification: H02K

Abstract:
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 in 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 these 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; andplural 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 claw-shaped magnetic poles, whereina multidegree of freedom vibrating system composed of said claw-shaped magnetic poles and said reinforcing bodies having said magnets fixedly attached thereto, wherein said attaching portion of each of said reinforcing bodies is fixedly attached to the inner circumferential wall surface of an associated claw-shaped magnetic pole.