Electrical isolators
US4054829A · kind A · utility
11Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 1976 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | May 25, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electrical isolator has a transformer with an impedance in series with the primary winding and a high gain amplifier amplifying voltages induced in the secondary winding. Feedback is provided from the amplifier output to produce a current generating flux in the transformer core in opposition to flux produced by current in the primary. Thus the flux density is reduced and with a very high gain amplifier may be made close to zero and well away from saturation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.