Method and apparatus for measuring current
US7746068B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 25, 2005 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Aug 15, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/181
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Current testing/measuring apparatus 10 comprises a flexible member 12 having a first end 14 and a second end 16. In use, the flexible member 12 is arranged to locate around a conductor 11 carrying a current to be measured. In particular, the current measuring apparatus 10 comprises a Rogowski coil. The ends of the flexible member 12 are coupled together in use but a gap is created between the ends. This distance can generate errors in the current measurement and the present invention provides compensation means 28 in the form of a compensation windings. The compensation windings comprise a planar spiral conductor provided on a printed circuit board to compensate for the separation distance between the first end and the second end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.