Velocity and imbalance observer control circuit for active magnetic bearing or damper
US4841184A · kind A · utility
20Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1987 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jun 23, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C32/0444
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
"Velocity Observer" and "Imbalance Observer" circuits are used to control the journals in the magnetic field of an attractive type active magnetic bearing and/or damper. The circuits are characterized by the use of integrators rather than differential components. The velocity observer circuit uses a position feedback loop and a velocity observer feedback loop, both with variable gain, to control the levitation of the journal in the magnetic field. The imbalance observer circuit recreates the journal acceleration directly from the displacement measurement and can be used optionally on-line and off-line to suppress vibrations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.