Bias current control circuit
US5703424A · kind A · utility
45Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Sep 16, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C32/0451
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system for a magnetic bearing includes a sensor which generates an output representative of the relative shaft position. The signal from the sensor is processed by an integrator and offset adjustment block and a difference amplifier to subtract the processed sensor signal from a reference voltage. The difference signal result is fed to a bias control circuit including voltage dividers which generates a voltage which is received by coil current power amplifiers for both the upper and lower magnetic coils. Coil currents are then generated to stabilize the magnetic bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.