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Alternator-for-vehicles-having-permanent-magnets-in-rotor

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Alternator for vehicles having permanent magnets in rotor

Details

Inventors: Tan, Yoshiki; Murata, Nakato;
Assignee: Denso Corporation (Kariya, JP)
Primary Examiner: Nguyen; Tran
Assistant Examiner:
Attorney, Agent or Firm: Oliff & Berridge, PLC

A brushless-type alternator has a rotor, which comprises a pair of pole cores. The pole cores include a plurality of nail parts, respectively. The nail parts are arranged alternately in a rotating direction of the rotor. The nail parts are coupled to-each other with a non-magnetic ring. A permanent magnet is interposed between adjacent two of the nail parts, and fixedly held in position with the non-magnetic ring. The permanent magnets are located radially inside or outside the non-magnetic ring.

DETAILED DESCRIPTION The present invention addresses this problem, and has an object to improve electric power generated by an alternator without complicating manufacturing and assembling processes.
According to the present invention, an alternator has a rotor, which comprises a pair of pole cores.
The pole cores include a plurality of nail parts arranged alternately in a rotating direction, respectively.
The nail parts are coupled to each other with a non-magnetic ring.
A permanent magnet is interposed between adjacent two of the nail parts, and fixedly held in position with the non-magnetic ring.
The permanent magnets are located radially inside or outside the non-magnetic ring.

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