Title:
ROTOR OF BRUSHLESS MOTOR
Document Type and Number:
WIPO Patent Application WO/1992/009132
Kind Code:
A1
Abstract:
A rotor (31) of a brushless motor comprises a rotary shaft (32) and a main yoke (33) fitted to the rotary shaft (32) in one unit. The main yoke (33) has at least two magnetic pole heads (34a, 34b) radially projecting from the rotary shaft (32). Between the adjacent magnetic pole heads (34a, 34b) there are provided magnet receiving seats (35a, 35b) on which field permanent magnets (36a, 36b) are so mounted that the like magnet poles are directed toward the rotary shaft (32), facing each other. Auxiliary yokes (38a, 38b) are mounted on the outer surfaces of the field permanent magnets (36a, 36b). On the outer surfaces of the magnetic pole heads (34a, 34b) and the auxiliary yokes (38a, 38b), a cylindrical sleeve (40) is provided. Thus the structure of the rotor (31) of a brushless motor is simple, and the magnetic flux ot the field permanent magnets (36a, 36b) are effectively utilized.
Inventors:
NAGATE TAKASHI (JP)
ENDO KENICHI (JP)
KOIKE YOSHIKAZU (JP)
SETO TAKESHI (JP)
YAMAGISHI YOSHIHIKO (JP)
ENDO KENICHI (JP)
KOIKE YOSHIKAZU (JP)
SETO TAKESHI (JP)
YAMAGISHI YOSHIHIKO (JP)
Application Number:
PCT/JP1991/001054
Publication Date:
May 29, 1992
Filing Date:
August 06, 1991
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
International Classes:
H02K1/27; (IPC1-7): H02K1/27
Foreign References:
| JPS4933482B1 | 1974-09-07 | |||
| JPS4921525Y1 | 1974-06-10 | |||
| JPH01209942A | 1989-08-23 | |||
| JPS5734170U | 1982-02-23 |
Attorney, Agent or Firm:
Mori, Masazumi (Honcho 2-chome Nakano-ku, Tokyo 164, JP)
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