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Title:
PERMANENT MAGNET ROTATING ELECTRIC MACHINE
Document Type and Number:
WIPO Patent Application WO/2015/132918
Kind Code:
A1
Abstract:
A permanent magnet rotating machine comprises: a housing having a cylindrical frame, a load-side bracket fixed on one end of the frame, and an anti-load-side bracket fixed on the other end of the frame, wherein an outer ring of a bearing is fitted into a circular recess of the load-side bracket; a stator formed in a cylindrical shape by stacking silicon steel plates, provided with a plurality of teeth on an inner circumferential portion thereof, and fitted into the frame of the housing with windings wound around the teeth; a rotor having a structural steel thin-walled cylindrical portion on an outer circumferential portion of which a plurality of permanent magnets are securely attached at equal intervals, a stepped circular plate portion connected to one end of the thin-walled cylindrical portion, and a shaft fixed at the center of the stepped circular plate portion, the rotor being freely rotatably supported at the load-side bracket of the housing in a cantilever manner with the stepped portion of the stepped circular plate portion fitted into an inner ring of the bearing; and a back yoke formed in a cylindrical shape by stacking silicon steel plates, inserted into the thin-walled cylindrical portion of the rotor at a distance of a very small air gap, and supported at the anti-load-side bracket of the housing in a cantilever manner.

Inventors:
OTSUKA, Hisashi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
YAMAGUCHI, Shinichi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
NAKA, Koki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
ISHIZUKA, Atsuki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2014/055690
Publication Date:
September 11, 2015
Filing Date:
March 05, 2014
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H02K21/14; H02K1/27; H02K16/04
Foreign References:
US20080231134A12008-09-25
JPS54157211U1979-11-01
JPH10323003A1998-12-04
US20040174083A12004-09-09
JPH11308844A1999-11-05
Attorney, Agent or Firm:
SAKAI, Hiroaki (Sakai International Patent Office, Toranomon Mitsui Building 8-1, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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