Controller for magnetic bearing system
US4879500A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Dec 19, 1988 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Dec 19, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2322/39
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A controller for a magnetic bearing system which controls the magnetic attraction force acting between a rotor yoke rigidly secured to a rotary shaft and a pair of electromagnet stators rigidly secured to a casing on the basis of a signal output from a displacement sensor which measures relative displacement between the rotary shaft and the casing. The signal output from the displacement sensor is input to a compensation circuit. The signal output from the compensation circuit is input to both the non-inverting input terminal of one operational amplifier and the inverting input terminal of the other operational amplifier. An exciting coil bias voltage is input to the respective inverting input terminals of the two operational amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.