Patent · US Active

Methods and systems for accuracy improvement in current comparators

US9632164B2 · kind B2 · utility

1Cited by

4References

10Claims

0Family size

Assignee

GUILDLINE INSTRUMENTS LIMITED · CA

Inventors

Mark Evans · Troy, US
Tomasz Barczyk · Ottawa, CA
Iain Page · Ottawa, CA
Kenneth Mikolajek · Ottawa, CA

Key dates

Filing date	Jul 1, 2014
Grant date	Apr 25, 2017
Priority date	—
Expiry date	Jun 18, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG01R35/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Precision AC and DC voltage, current, phase, power and energy measurements and calibrations with current ranges from 1 uA to 20 kA and voltage ranges from 1V to 1000 kV are now performed with accuracies of better than one part per million. Continued demand for improved accuracy has led the inventors to address remnant magetization within the current comparators that form the basis of the measuring process within many of the measurement instruments providing the precision AC and DC measurements and calibrations. Accordingly, the inventors present current comparator and measurement system architectures together with control protocols to provide for correction of this remnant magnetization.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.