Device for mounting and driving a spindle, particularly a textile spindle
US5973430A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 1996 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | May 3, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2380/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for mounting and driving a tubular spindle (10) has first and second axial-flux radial active magnetic bearings (60, 70) disposed respectively at a first end of the tube (10) and at a second end thereof. Each of the radial active magnetic bearings (60, 70), between which an electric motor (80) is interposed, includes a stator magnetic circuit made up of two subassemblies (61, 62; 71, 72) each of four axial-flux slot-free touching elements distributed around the tube (10). A mechanism is also provided for establishing a reduced pressure, of the order of a few hundreds of Pascals to a few thousands of Pascals, inside the spindle in the air gaps of the radial magnetic bearings (60, 70) and of the electric motor (80).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.