Title:
PERMANENT MAGNET EMBEDDED ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATING AND AIR-CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/092925
Kind Code:
A1
Abstract:
A permanent magnet embedded electric motor (1) comprises a stator (3) and a rotor (5) provided facing the stator (3) in a rotatable manner. The rotor (5) has a rotor core (11) in which a plurality of magnet insertion holes (21) into which the respective corresponding permanent magnets (19) are inserted are formed. The permanent magnets (19) and the magnet insertion holes (21) are formed in an arc shape protruding toward the center side of the rotor (5). When the shortest distance between adjacent magnet insertion holes (21) is defined as an inter-polar shortest distance (L), the ratio of the inter-polar shortest distance (L) to the outer diameter (D) of the rotor (5) satisfies a relationship of 0.035 ≤ L/D ≤ 0.05.
Inventors:
ISHIKAWA ATSUSHI (JP)
BABA KAZUHIKO (JP)
NIGO MASAHIRO (JP)
TSUCHIDA KAZUCHIKA (JP)
BABA KAZUHIKO (JP)
NIGO MASAHIRO (JP)
TSUCHIDA KAZUCHIKA (JP)
Application Number:
PCT/JP2013/084323
Publication Date:
June 25, 2015
Filing Date:
December 20, 2013
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02K1/27
Foreign References:
| JP2001218404A | 2001-08-10 | |||
| JP2000333391A | 2000-11-30 | |||
| JP2013212035A | 2013-10-10 | |||
| JP2010213553A | 2010-09-24 | |||
| JPH08331783A | 1996-12-13 | |||
| JPH11275783A | 1999-10-08 |
Attorney, Agent or Firm:
SOGA, Michiharu et al. (JP)
Michiharu Soga (JP)
Michiharu Soga (JP)
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