Current sensor with magnetic toroid
US7145321B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 25, 2005 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Feb 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/185
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current sensor for sensing current in a primary source, including a primary conductor forming at least one winding on a first portion of a toroid formed from a magnetic material. A secondary source of electrical current from a signal forms a plurality of winding on a second portion of the toroid. An output reader measures the instantaneous loading of the signal passing through the plurality of windings as a function of the primary source current. The preferred toroid is formed from an amorphous core magnetic material having an hysteresis saturation point is much larger than the coercivity of the material and said primary source of electrical current is AC or DC current. The device includes an amplifier for receiving the signal and place an AC voltage or current on the plurality of windings, and further includes a resistor form measuring the resulting voltage or current instantaneous loading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.