Current probe
US5493211A · kind A · utility
30Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1993 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | Jul 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current probe comprising a Hall device and a secondary winding in a flux linking relationship with a magnetic circuit is self-calibrated by disconnecting the Hall device from the winding, passing a current through the winding so as to induce a magnetic flux in the magnetic circuit, measuring voltage developed by the Hall device in response to linking by the magnetic flux, calculating the Hall gain of the Hall device, and then adjusting the gain of a scaling output amplifier on the basis of the calculated Hall gain to compensate for variation in Hall gain due to changes in operating conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.