Title:
STATOR CORE MANUFACTURING METHOD, STATOR CORE, AND MOTOR
Document Type and Number:
WIPO Patent Application WO/2023/182257
Kind Code:
A1
Abstract:
This stator core manufacturing method includes: a distortion prevention hole forming step for forming, in a steel plate, first distortion prevention holes and second distortion prevention holes; a cut line forming step for, by pressing, in the thickness direction of the steel plate, at least part of divided core piece forming regions of the steel plate where divided core pieces are to be formed, forming cut lines that constitute parts of the outer circumferences of the divided core piece forming regions and that connect the first distortion prevention holes and the second distortion prevention holes formed in the steel plate; and a push-back step for returning, to original positions of the steel plate, portions of the divided core piece forming regions pressed in the thickness direction in the cut line forming step.
Inventors:
KITA NOBUYUKI (JP)
YONEYAMA TAKASHI (JP)
YONEYAMA TAKASHI (JP)
Application Number:
PCT/JP2023/010829
Publication Date:
September 28, 2023
Filing Date:
March 20, 2023
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02K15/02; H02K1/18
Domestic Patent References:
| WO2016147214A1 | 2016-09-22 | |||
| WO2018062003A1 | 2018-04-05 | |||
| WO2019049486A1 | 2019-03-14 |
Foreign References:
| JP2012005155A | 2012-01-05 | |||
| JP2015080412A | 2015-04-23 | |||
| JP2021052574A | 2021-04-01 |
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