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Patent Searching and Data


Title:
ELECTRIC MOTOR, COMPRESSOR, AND AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/198138
Kind Code:
A1
Abstract:
This electric motor has a rotor which is rotatable about a rotation axis, and a stator which surrounds the rotor and which has an air gap between the stator and the rotor. The rotor has a rotor core which has a magnet insertion hole, and a rare-earth magnet which is disposed within the magnet insertion hole. The rotor core has a plurality of slits positioned outside the magnet insertion hole in a radial direction centered on the rotation axis. The length of each of the plurality of slits in the radial direction is greater than the length thereof in a circumferential direction centered on the rotation axis. The shortest distance of each of the plurality of slits to the magnet insertion hole is equal, and if the shortest distance is designated as T, and the air gap is designated as G, then the relationship of 2.75 ≤T/G ≤5.25 is satisfied.

Inventors:
ISHIKAWA Atsushi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2018/014989
Publication Date:
October 17, 2019
Filing Date:
April 10, 2018
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H02K1/27
Domestic Patent References:
WO2014069438A12014-05-08
Foreign References:
JP2018057155A2018-04-05
JP2008187778A2008-08-14
JP2011097754A2011-05-12
JP2013255321A2013-12-19
JP2015208053A2015-11-19
JP2014187748A2014-10-02
JP2017194064A2017-10-26
Attorney, Agent or Firm:
MAEDA Minoru et al. (MAEDA & YAMAGATA, Koda Bldg. 4F 16-2, Yoyogi 2-chome, Shibuya-k, Tokyo 53, 〒1510053, JP)
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