Title:
STATOR CORE AND MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/112969
Kind Code:
A1
Abstract:
Provided are a stator core and a manufacturing method capable of achieving improved suppression of iron loss. A stator core is formed by laminating stator pieces 17 having tooth pieces 21 in the inner periphery of annular sections 20, and comprises: radial recess sections 23 provided to outer edges 35 of the stator pieces 17; radial projecting piece sections 25 provided inside the radial recess sections 23; lamination-direction recess sections 27 and projection sections 29 provided to the front and rear sides of the radial projecting piece sections 25; a fitted section 47 in which the recess sections 27 and projection sections 29 are fitted to each other between the stator pieces 17 by means of fastening in the lamination direction; and a welding part 5 in which the projection sections 29 and the recess sections 27 of the fitted section 47 are welded in the lamination direction.
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Inventors:
TAMURA TATSUJI (JP)
Application Number:
PCT/JP2022/046089
Publication Date:
June 22, 2023
Filing Date:
December 14, 2022
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
H02K1/18; H02K15/02
Domestic Patent References:
| WO2017104403A1 | 2017-06-22 |
Foreign References:
| JP2017208955A | 2017-11-24 | |||
| JP2017005785A | 2017-01-05 |
Attorney, Agent or Firm:
SUDO Yuichi et al. (JP)
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