Rotor lamination assembly for a dynamoelectric machine
US4987330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7035
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved laminated rotor assembly is disclosed which features a novel key/keyway design that prevents lamination reversal while permitting indexing of successive laminae for the distribution of dimensional variations thereof. There are multiple, symmetrically oriented keyways, each keyway having an identical asymmetrical profile. The symmetrical distribution of identical profile keyways permits indexing of successive laminae, and the asymmetrical keyway profiles prevent lamination reversal. In the preferred embodiment, two or three keyways are employed, each key and keyway being formed in the shape of a step having at least two different radial dimensions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.