Magnetic suspension device of a rotor placed in a sealed enclosure
US4500142A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1983 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Jun 13, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/1026
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to an active magnetic suspension device of a rotor placed in a sealed enclosure. Each active radial bearing comprises a stator composed of electromagnetic windings associated with a magnetic yoke which has end pole pieces placed at a short distance from the annular armature mounted on the rotor, the electromagnetic windings being arranged outside the sealed enclosure. Each stator magnetic yoke of laminar material is extended at the level of the end pole pieces by a terminal portion of non-laminar material, of small thickness, which constitutes directly a portion of the wall of the sealed enclosure and is attached by welding to the non-magnetic sealed wall portions which are not situated facing the annular armature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.