Device and method for measuring an electric current

US6583613B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Hans-Peter Hohe · Heiligenstadt, DE
• Norbert Weber · Pocking, DE
• Josef Sauerer · Herzogenaurach, DE

Key dates

• Filing date: Jul 18, 2001
• Grant date: Jun 24, 2003
• Expiry date: Jul 18, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R15/20
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A current measuring device for measuring the current through one or a plurality of conductors (L1, L2, L3) of an array of n conductors, n being a natural number≧2, comprises n+1 magnetic-field-sensitive sensors (S1 to S4) which are arranged such that two respective magnetic-field-sensitive sensors are arranged adjacent a respective conductor. A unit (12) for reading out output signals of the magnetic-field-sensitive sensors is provided. Furthermore, the current measuring device is provided with a unit (10) for calculating the current through one or a plurality of conductors on the basis of the read output signals and on the basis of coefficients which describe the influence of currents flowing through each of the n conductors and of a constant magnetic field on the output signal of each of the magnetic-field-sensitive sensors.