Current difference sensors, systems and methods
US10488445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2017 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | May 24, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/096
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an embodiment, a current difference sensor includes first and second conductors arranged relative to one another such that when a first current flows through the first conductor and a second current, equal to the first current, flows through the second conductor, a first magnetic field induced in the first conductor and a second magnetic field induced in the second conductor cancel each other at first and second positions; first and second magnetic field sensing elements are arranged at the first and second positions, respectively, and have a first sensitivity to the first and second currents; third and fourth magnetic field sensing elements are arranged at other positions, and have a second sensitivity to the first and second currents; and the first sensitivity is less than the second sensitivity such that the first and second magnetic field sensing elements and not the third and fourth magnetic sensing elements are selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.