Dynamoelectric machine
US7728480B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2007 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Jan 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The stator core is configured into a cylindrical shape by abutting a laminated core that is obtained by bending and forming a rectangular parallelepiped lamination and integrating the stator core by welding. The lamination is configured by laminating a predetermined number of thin strip-shaped magnetic plates that are formed so as to have a flat rectangular shape, and in addition at least two thin sheet coupling weld portions that integrate the predetermined number of thin strip-shaped magnetic plates by welding are formed so as to extend from a first end to a second end in a direction of lamination on an outer wall surface of the lamination and so as to have a predetermined spacing in a longitudinal direction of the lamination. The stator core is formed such that an axial length A at the thin sheet coupling weld portions and a maximum axial length B between the thin sheet coupling weld portions satisfy an expression: 0.0 mm≦B·A≦0.2 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.