Method of manufacturing core sheet including insulation coating removing step
US11881341B2 · kind B2 · utility
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1References
15Claims
0Family size
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Inventors
Key dates
| Filing date | Mar 31, 2020 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Jul 25, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method of manufacturing a core sheet. The core sheet has an annular core back portion and a plurality of tooth portions extending from the core back portion toward a radial center thereof. The method includes a blanking step, a rolling step and a removing step. In the removing step, an insulation coating, which is on a region of a grain-oriented magnetic steel sheet for forming a band-shaped core back portion, on a band-shaped core back portion of a sheet piece or on the core back portion of the core sheet, is at least partially removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.