Methods and devices for AC current sources, precision current transducers and detectors
US9759748B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2015 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Jun 16, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/185
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Precision AC 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 improvements to dual stage and multi-stage current transducers that may form the basis of the measuring process within many of the measurement instruments providing the precision AC measurements and calibrations. Additionally, the improvements to dual stage and multi-stage current transducers provide for novel feedback controlled precision AC current sources without requiring measurement of the AC current source output directly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.