Non-metallic structural rotor enclosure
US6495942B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Jan 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A non-metallic structural enclosure for a generator rotor replaces conventional containment components including rotor wedges, rotor teeth and retaining rings. The enclosure includes a non-metallic tube formed of a plurality of spaced rings or of a continuous tube including ventilation holes or slots. The simplified rotor assembly serves to restrain the winding against centrifugal forces with a more highly optimized use of space and materials. The arrangement allows more space for copper and ventilation, thereby benefiting both efficiency and the performance of the machine. The use of individual rings has the additional benefit of providing restraint against centrifugal forces without reducing the effectiveness of cross slots in the rotor body from correcting peripheral dissymmetries in rotor stiffness. The rings also provide openings for ventilation without introducing stress concentrations in the enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.