Title:
ROTOR AND DYNAMO-ELECTRIC MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/255481
Kind Code:
A1
Abstract:
This rotor (20) is provided with a rotor core (22) that has a plurality of magnet accommodation holes (24) in a folded shape protruding radially inward, and a plurality of permanent magnets (23) embedded in the plurality of magnet accommodation holes. The rotor core includes a plurality of core sheets (30) stacked in an axial direction, each of the plurality of core sheets having a plurality of magnet through-holes (31, 32). The plurality of magnet accommodation holes are configured by the plurality of magnet through-holes of the axially stacked plurality of core sheets overlapping in the axial direction. The inner surfaces of the magnet accommodation holes include rugged portions (43, 44, 45) formed by positional differences in edge portions of the magnet through-holes overlapping in the axial direction, and a non-rugged portion (46) where the rugged portions are not formed. The permanent magnets have engaging portions (51, 52, 53) that fit into concave portions (43a, 44a, 45a) of the rugged portions.
Inventors:
SAKAI MASAHITO (JP)
Application Number:
PCT/JP2022/022615
Publication Date:
December 08, 2022
Filing Date:
June 03, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02K1/2706
Domestic Patent References:
| WO2018128006A1 | 2018-07-12 |
Foreign References:
| JP2015116105A | 2015-06-22 | |||
| JP2020156295A | 2020-09-24 | |||
| JP2006033982A | 2006-02-02 |
Attorney, Agent or Firm:
ONDA Makoto et al. (JP)
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