Electromagnetic damping of a shaft
US5053662A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1990 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Apr 18, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/23
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Electromagnetic damping techniques for use in slowing down the shaft to a gas turbine based on various electrical machine concepts. A rotor may be mounted on an outer race of a bearing through which the shaft extends. The damper may use a permanent magnet (PM) design with permanent magnets mounted to the rotor. Alternately, the rotor and stator may be designed to operate upon a switched reluctance motor (SRM) design. Instead of having the rotor mounted to the outer race, an alternate arrangement may use a rotor mounted directly to the gas turbine shaft in which case the rotor and a corresponding stator serve both as a damper and as an electrical generator for providing the usual electrical generation functions from the gas turbine shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.