Patent · US Active

Current Sensor

US7400131B2 · kind B2 · utility

3Cited by

4References

20Claims

0Family size

Assignee

Vacuumschmelze GmbH & Co. KG · DE

Inventor

Norbert Preusse · Alzenau, DE

Key dates

Filing date	Oct 30, 2006
Grant date	Jul 15, 2008
Priority date	—
Expiry date	Jan 20, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG01R15/148
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A current sensor comprises a magnetic module, whereby a primary conductor, a compensating winding and a magnetic field probe are magnetically coupled to each other. The primary conductor carries a current to be measured, with a driving circuit, for producing a triangular current, injected into the compensating winding. An evaluation circuit switches the output signal thereof from a first to a second output level and vice versa by a zero crossing of a signal, provided by the magnetic field probe, whereby the output signal is pulse-width modulated, depending on the intensity of the current to be measured.

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