Current sensor with self-oscillating generator circuit
US6218825A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jul 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Current sensor with a magnetic core (8) on which, besides a primary winding (9) in which the current to be measured (i) flows, at least one secondary winding (5) is wound, into which winding an alternating current that is generated by a generator circuit (1 to 7; 14 to 29) is fed, said current saturating the magnetic core (8) in alternating fashion in at least one direction, whereby the generator circuit is self-running, whereby the polarity of the alternating current generated by the generator circuit (1 to 7; 14 to 29) alternates depending on the current flowing in the secondary winding (5) and on at least one threshold value for this current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.