Title:
EMBEDDED PERMANENT MAGNET ELECTRIC MOTOR AND COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2013/114541
Kind Code:
A1
Abstract:
An embedded permanent magnet electric motor obtained by arranging within a stator a rotor core (7) obtained by layering a plurality of electromagnetic steel sheets, wherein magnets constituting a magnetic pole of the rotor core (7) comprise: ferrite magnets (4) arranged in the circumferential direction of the rotor core (7) in a number equivalent to the number of poles, the ferrite magnets (4) being provided to the outer peripheral side of the rotor core (7); and rare earth magnets (3) arranged between the ferrite magnets (4); the cumulative thickness of the rotor core (7) is formed to be greater than the cumulative thickness of a stator core (24); the axial length (Lf) of the ferrite magnets (4) is formed to be greater than the axial length (Ln) of the rare earth magnets (3); the axial length (Ln) of the rare earth magnets (3) is formed to be substantially equivalent to the cumulative thickness of the stator core (24); the axial length (Lf) of the ferrite magnets (4) is formed to be substantially equivalent to the cumulative thickness of the rotor core (7) and the rare earth magnets (3) are provided to a position corresponding to an inner peripheral section of the stator core (24) with respect to the cumulative thickness direction of the rotor core (7).
Inventors:
BABA KAZUHIKO (JP)
NIGO MASAHIRO (JP)
YABE KOJI (JP)
TSUCHIDA KAZUCHIKA (JP)
NIGO MASAHIRO (JP)
YABE KOJI (JP)
TSUCHIDA KAZUCHIKA (JP)
Application Number:
PCT/JP2012/052027
Publication Date:
August 08, 2013
Filing Date:
January 30, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
BABA KAZUHIKO (JP)
NIGO MASAHIRO (JP)
YABE KOJI (JP)
TSUCHIDA KAZUCHIKA (JP)
BABA KAZUHIKO (JP)
NIGO MASAHIRO (JP)
YABE KOJI (JP)
TSUCHIDA KAZUCHIKA (JP)
International Classes:
H02K1/27; H02K21/16
Foreign References:
| JP2010068600A | 2010-03-25 | |||
| JP2009038930A | 2009-02-19 | |||
| JP3832530B2 | 2006-10-11 | |||
| JP2001115963A | 2001-04-27 | |||
| JP2012023833A | 2012-02-02 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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Claims: