Flare tooth stator for an AC generator
US6742238B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2001 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Aug 8, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53143
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stator core extends along a longitudinal axis and includes a yoke, and a plurality of radially-inwardly projecting teeth separated by intervening slots. A radially innermost portion of each tooth initially includes a pair of legs separated by a recess disposed therebetween. The conventional tooth tips are unformed in the first stage, thereby defining an increased-size slot opening for allowing the insertion of stator windings. In a second processing stage, after the core itself has been manufactured and wound with stator windings, the legs are cold-formed in order to form tooth tips, which define a reduced-size slot opening to provide a magnetic flux path and provide a wire retention function. A higher stator slot fill is provided, which allows and enables higher generator efficiencies and output for a given package size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.