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US 2022/0021248 A1Published application
Non-oriented electrical steel sheet, segmented stator, and rotating electrical machine
AssigneeNippon Steel Corporation
InventorsYoshiaki NATORI, Hiroyoshi YASHIKI, Miho TOMITA
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Abstract
A non-oriented electrical steel sheet has a chemical composition containing, in terms of % by mass, C: 0.0015% or less and Si: 2.5 to 4.0% and having an average crystal grain size of 10 to 40 μm, and an internal oxidation layer having a thickness of 0.5 to 3.0 μm present in a sheet thickness direction of a surface thereof.
Claims8
A non-oriented electrical steel sheet, comprising:
- a chemical composition containing, in terms of % by mass, C:
- 0.0015% or less;
- and
- 2.5 to 4.0%,
- wherein an average crystal grain size is 10 to 40 μm, and
- an internal oxidation layer having a thickness of 0.5 to 3.0 μm from a surface in a sheet thickness direction is present.
3 more elements
A segmented stator for a rotating electrical machine segmented into a plurality of stator pieces in a circumferential direction, comprising:
- a cylindrical yoke extending in an axial direction;
- and
- a plurality of teeth extending in a radial direction from an inner circumferential surface of the yoke,
- wherein each of the stator pieces is formed by laminating a plurality of non-oriented electrical steel sheets,
- when directions in which the teeth extend are defined as a reference of a crystal axis, an X-ray random intensity ratio of a {110} <001> orientation of the stator piece is 5 or more,
- an average crystal grain size of the non-oriented electrical steel sheet is 100 to 200 μm, and
- a chemical composition of the non-oriented electrical steel sheet contains, in terms of % by mass, C:
- 0.0015% or less;
- and
- Si:
- 2.5 to 4.0%.
8 more elements
Dependencies are inferred from the claim text.